JP2015079096A - Silencer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a silencer allowing a player to sufficiently receive the vibration and sound fed back to the player, even when the player plays a wind instrument while a silencer is attached to the wind instrument.SOLUTION: An opening 15 is disposed in the center of a disc-shaped closed unit 12. One end of a pipe 21 is fixed to an edge of the opening 15. Both ends of the pipe 21 are open. A musical interval adjustment unit 23 is disposed at the other end of the pipe 21. A substantially annular fixed unit 25 is bonded to the vicinity of the edge of the closed unit 12. The end on the outer peripheral side of the fixed unit 25 is molded so that the cross section has a hook shape. The closed unit 12 is fixed to an end of a bell 3 by hanging the end on the outer peripheral side of the fixed unit 25 on a wound part of the end of the bell 3.

Description

  The present invention relates to a silencer.

  There are cases where wind instrument practice is performed in places and situations where wind instruments cannot be played at high volume. In such a case, a silencer is used for the purpose of reducing the volume of the wind instrument. A conventional silencer (for example, a silencer disclosed in Patent Document 1) has a cylindrical main body, and a fixed portion is provided on the outer wall of the main body. The silencer is fixed to the wind instrument by bringing the fixing portion into contact with the inner wall of the bell. Here, the bell in the wind instrument refers to a portion in the vicinity of the exhalation outlet where the diameter of the wind instrument tube is gradually widened in order to increase the volume.

Japanese Patent No. 2865030

By the way, the wind instrument winder adjusts the degree of tension of the lip muscles and the degree of breath blowing instantaneously for each pronunciation so that the pitch and volume of the sound to be generated are appropriate. . The brass player makes such adjustments by relying on vibrations and sounds fed back from the wind instrument to the wind instrument when the wind instrument is played. Examples of vibrations and sounds that are fed back from the wind instrument to the brass player include the following.
(1) Sound radiated from the end face of the bell and reaching the winder's ear (2) Vibration of the wind instrument itself during the wind transmitted to the hand holding the wind instrument, etc. (3) From the bell outer wall due to the vibration of the bell during the wind Sound that radiates and reaches the ear of the blower (4) Vibration of the mouthpiece during blowing that is transmitted from the mouthpiece to the lips, teeth, etc.

  When a silencer is attached to a wind instrument and played, the volume of the sound emitted from the end face of the bell decreases. In addition to this, when the silencer is attached to the wind instrument, the silencer comes into contact with the inner wall of the bell, so that the vibration of the wind instrument that occurs during blowing is suppressed by the silencer. For this reason, the vibration of the wind instrument itself transmitted to the hand etc. which hold | maintain a wind instrument reduces. Moreover, since the vibration of the bell is suppressed, the sound radiated from the outer wall of the bell and reaching the blower's ear is also reduced. Accordingly, when the silencer is attached to the wind instrument, the wind player cannot sufficiently receive the sound from the end face of the bell, the vibration of the wind instrument itself, and the sound from the outer wall of the bell. The failure to receive enough sound from the end face of the bell is a result of the muffler's original role, but it can receive enough vibration from the wind instrument itself and sound from the outer wall of the bell. Elimination is a side effect that is undesirable. Of the vibrations and sounds that are fed back from the wind instrument to the brass player, not only the sound from the end face of the bell but also the vibrations of the wind instrument and the sound from the outer wall of the bell cannot be received sufficiently, so these feedback vibrations Depending on the sound and sound, it becomes difficult to instantaneously adjust the degree of tension of the lip muscles and the state of breath blowing for each pronunciation so that the pitch and volume are appropriate.

  The present invention has been made in view of the above circumstances, and even when a silencer is attached to a wind instrument and played, the vibration and sound fed back to the wind instrument, particularly the vibration of the wind instrument itself and the outer wall of the bell. The purpose is to provide a silencer that can be fully received by the player.

  The present invention relates to a closing portion that closes an end surface of a bell of a wind instrument, a pipe having one end fixed to an opening provided in the closing portion, and communicating a space inside the bell and a space outside the bell. A silencer comprising: a pitch adjusting unit fixed to the other end of the pipe; and a fixing unit for fixing the closing unit to the end of the bell.

  According to this invention, the fixing | fixed part which fixes the obstruction | occlusion part which obstruct | occludes the end surface of the bell of a wind instrument to the end part of a bell is provided. The end of the bell is presumed to be a portion with small vibration when played without a muffler. Since the closed part is fixed to the end of the bell, which is presumed that the vibration at the time of playing is originally small, through the fixing part, even if the closed part is fixed, the vibration of the bell at the time of playing is affected. There is no. For this reason, when the silencer is attached to a wind instrument and played, the user can perform vibrations and sounds fed back from the wind instrument, particularly vibrations of the wind instrument itself and bells, as in the case of playing without the silencer attached to the wind instrument. Can fully receive sound from the outside wall.

  Further, according to the present invention, a closed portion that closes an end face of a bell of a wind instrument, and one end thereof is fixed to an opening provided in the closed portion, and the space inside the bell and the space outside the bell are communicated with each other. A silencer comprising: a pipe, a pitch adjusting unit fixed to the other end of the pipe, and a fixing unit fixing the pitch adjusting unit to an inner wall of a straight taper portion of the bell. .

  According to this invention, the fixing | fixed part which fixes a pitch adjustment part to the inner wall of the straight taper part of a bell is provided. The straight taper portion of the bell is presumed to be a portion with small vibration when played without a muffler, similarly to the end portion of the bell. Since the pitch adjustment part is fixed to the inner wall of the straight taper part of the bell, which is presumed to have low vibration during the playing, even if the pitch adjustment part is fixed, the vibration of the bell during the playing is fixed. Will not be affected. For this reason, when the silencer is attached to a wind instrument and played, the user can perform vibrations and sounds fed back from the wind instrument, particularly vibrations of the wind instrument itself and bells, as in the case of playing without the silencer attached to the wind instrument. Can fully receive sound from the outside wall.

It is the longitudinal cross-sectional view and front view which show the structure of the silencer 1 by 1st Embodiment of this invention. FIG. 3 is an enlarged longitudinal sectional view showing an enlarged configuration of an end portion of the bell 3 and a configuration of a fixing portion 25 of the silencer 1 attached to the end portion of the bell 3. 3 is a longitudinal sectional view showing a configuration of a bell 3. FIG. It is a longitudinal cross-sectional view which shows the structure of the silencer 1A by 2nd Embodiment of this invention.

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 in which the diameter of the tube of the wind instrument (trumpet) in the bell gradually decreases is referred to as the rear, and the direction in which the diameter of the tube of the wind instrument in the bell increases gradually is referred to as the front.

  FIG. 1 (A) is a longitudinal sectional 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 front. It is a front view which shows the structure. 1A and 1B show a state where the silencer 1 is attached to the trumpet.

  As shown in FIG. 1, the silencer 1 includes a closing part 12, a support part 22, a pipe 21, a pitch adjustment part 23, and a fixing part 25.

  The closing part 12 is a member for closing the end face of the bell 3. The blocking part 12 has a disk shape. The diameter of the blocking portion 12 is slightly smaller than the diameter of the end face of the bell 3. An opening 15 having a circular cross section that penetrates the blocking portion 12 is provided at the center of the closing portion 12.

  One end of a cylindrical support portion 22 is fixed to one surface of the closing portion 12 in the vicinity of the edge of the opening 15. Hereinafter, the wall surface of the closed portion 12 where the support portion 22 is fixed may be referred to as an inner wall, and the opposite wall surface may be referred to as an outer wall. One end of a cylindrical pipe 21 is inserted inside the support portion 22. One end of the pipe 21 is fixed to the edge of the opening 15. The outer wall of the portion of the pipe 21 that is inserted inside the support portion 22 is fixed to the inner wall of the support portion 22.

  The pipe 21 has a constant outer diameter and inner diameter from one end to the other end. The rotation axis of the pipe 21 (hereinafter simply referred to as an axis) is parallel to the normal line of the wall surface of the closing portion 12. In a state where the silencer 1 is mounted on the trumpet, the 21 axis of the pipe overlaps the rotation axis (hereinafter simply referred to as the axis) of the bell 3.

  Both ends of the pipe 21 are open. The pipe 21 communicates the space inside the bell 3 and the space outside the bell 3 through the space inside the pipe 21. The space inside the bell 3 refers to the space inside the trumpet closed by the silencer 1 when the silencer 1 is mounted, and the space outside the bell 3 refers to the space outside the trumpet. Say. The pipe 21 plays a role of discharging the exhaled air blown into the trumpet by the blowing from the space inside the bell 3 to the space outside the bell 3. The inner diameter of the pipe 21 and the diameter of the opening 15 are equal to or larger than the minimum inner diameter of the mouthpiece.

  A pitch adjusting unit 23 is provided in the vicinity of the other end of the pipe 21. The pitch adjuster 23 has an outer diameter and an inner diameter that decrease toward the other end of the pipe 21 along the inner wall of the bell 3. That is, in a state where the closing portion 12 closes the end surface of the bell 3, the outer wall of the pitch adjusting portion 23 projects toward the inner wall of the bell 3. The large-diameter side end 23a of the pitch adjusting unit 23 is open. The small diameter side end 23 b of the pitch adjusting unit 23 is fixed to the other end of the pipe 21 and closed.

  A fixing portion 25 is provided in the vicinity of the edge of the closing portion 12. The fixing portion 25 is a member for fixing the closing portion 12 to the end portion of the bell 3. That is, the silencer 1 is attached to the trumpet via the fixing portion 25. The fixing portion 25 has a substantially annular shape, and is provided over the circumference of the closing portion 25. The fixing part 25 is formed of a material having appropriate hardness and appropriate flexibility such as rubber, for example.

  FIG. 2 is an enlarged longitudinal sectional view showing the configuration of the end portion of the bell 3 and the configuration of the fixing portion 25 of the silencer 1 attached to the end portion of the bell 3 in an enlarged manner. As shown in FIG. 2, the end portion on the inner peripheral side of the fixed portion 25 sandwiches the closed portion 12 from both wall surfaces of the closed portion 12 in the vicinity of the edge of the closed portion 12. The end portion on the inner peripheral side of the fixing portion 25 is joined to the edge portion of the closing portion 12.

  The end of the bell 3 is composed of an edge ring 32 and an edge winding part 31. The edge ring 32 has an annular shape. The edge ring 32 is made of metal or the like. The edge winding portion 31 is a tip portion of the bell member, and is a portion processed into a shape in which the edge ring 32 is wound around the outer winding.

  An end portion on the outer peripheral side of the fixed portion 25 is a portion attached to the edge winding portion 31 at the end portion of the bell 3. The end portion on the outer peripheral side of the fixed portion 25 is shaped so that the cross section has a bowl shape. More specifically, the end on the outer peripheral side of the fixing portion 25 bends backward (in other words, the direction in which the pipe 21 is provided with respect to the closing portion 12) as it goes to the tip, It is rounded in the direction toward the axis. The end on the outer peripheral side of the fixed portion 25 is bent along the outer wall of the edge winding portion 31 at the end of the bell 3.

An end on the outer peripheral side of the fixing portion 25 is hooked on the edge winding portion 31 so as to accommodate the edge winding portion 31 inside the bag formed by the end portion. When the outer peripheral end of the fixing portion 25 is attached to the edge winding portion 31 in this way, the closing portion 12 is fixed to the end portion of the bell 3 (more precisely, the edge winding portion 31). Is closed by the closing portion 12 and the fixing portion 25. A cavity 13 is formed inside the bell 3 by the fixing portion 25, the closing portion 12, the support portion 22, the pipe 21 and the bell 3. When the outer peripheral end of the fixed portion 25 is attached to the edge winding portion 31, only the outer peripheral end of the fixed portion 25 contacts the bell 3, and the other part of the silencer 1 is the bell. 3 is not touched.
The above is the configuration of the silencer 1.

  The silencer 1 according to the present embodiment is characterized in that the silencer 1 (more precisely, the closing portion 12) is fixed to the end portion (more precisely, the edge winding portion 31) of the bell 3 as described above. There is one. The reason for this will be described below.

  Describe the case where the silencer is not attached to the trumpet. When a trumpet without a silencer is played, the bell 3 vibrates in accordance with the playing. FIG. 3 is a cross-sectional view showing the configuration of the bell 3. As shown in FIG. 3, the bell 3 can be roughly divided into an end portion 35, a straight taper portion 36, and a flare portion 37 of the bell 3. The inventor speculated that the magnitude of the vibration of the bell 3 during blowing would be different for each part of the bell 3.

  The end portion 35 of the bell 3 is a front portion of the bell 3 and is a portion in the vicinity of the edge winding portion 31. As described above, the end portion 35 of the bell 3 is formed by processing the edge winding portion 31 into a shape in which the edge ring 32 is wound. For this reason, it can be said that the edge winding part 31 is suppressed by the edge ring 32. Therefore, it is presumed that the end portion 35 of the bell 3 has a smaller magnitude of vibration during blowing compared to a flare portion 37 described later.

  The straight taper portion 36 is a rear portion of the bell 3 and is a portion where the diameter of the tube is increased. The straight taper portion 36 is continuous with the trumpet body. For this reason, it can be said that it is suppressed by the trumpet body. Therefore, it is estimated that the straight taper portion 36 of the bell 3 has a smaller magnitude of vibration at the time of playing compared to a flare portion 37 described later.

  The flare portion 37 is a portion between the straight taper portion 36 and the end portion 35 of the bell 3, and is a portion where the diameter of the tube is greatly expanded (that is, a portion where the diameter of the tube is rapidly expanded). is there. The flare portion 37 is for efficiently radiating the vibration of the air inside the tube to the surrounding space. Therefore, it is estimated that the flare part 37 vibrates significantly according to the wind performance.

  It is presumed that the vibration of the bell 3 at the time of playing is mainly the vibration of the flare portion 37 of the bell 3. For this reason, even if the silencer 1 is brought into contact with the end portion 35 of the bell 3 whose vibration is originally small, it can be said that the vibration of the bell 3 at the time of blowing, that is, the vibration of the flare portion 37 of the bell 3 is not affected. . Therefore, in the silencer 1 according to the present embodiment, the silencer 1 is fixed to the end portion 35 of the bell 3 via the fixing portion 25.

  In the conventional silencer, as described above, the fixed portion is brought into contact with the inner wall of the bell 3, but more specifically, the stationary portion is brought into contact with the inner wall of the flare portion 37 of the bell 3 where vibration during blowing is large. That is, the silencer 1 according to the present embodiment is greatly different from the conventional silencer in that the silencer 1 is not fixed to the inner wall of the flare portion 37 of the bell 3 but is fixed to the end portion 35 of the bell 3.

  Next, the operation and usage of the silencer 1 according to the present embodiment will be described. When using the muffler 1, the user (wind player) inserts the muffler 1 into the bell 3 of the trumpet from the pitch adjusting unit 23 side. The user positions the closing portion 12 of the silencer 1 inserted into the bell 3 in the vicinity of the end face of the bell 3. And a user hooks the edge part of the outer peripheral side of the fixing | fixed part 25 on the edge winding part 31 of the edge part of the bell 3. FIG. After mounting the silencer 1 on the trumpet in this way, the user plays the trumpet.

  The exhaled air blown from the mouthpiece by blowing is passed through the trumpet, guided into the pipe 21 from the end of the pipe 21 of the silencer 1 into the pipe 21, passed through the pipe 21, and bell from the opening 15. 3 is discharged into the outer space.

  Sound waves generated in the trumpet due to blowing are transmitted to the cavity 13 through a gap between the outer wall of the pitch adjusting unit 23 and the inner wall of the bell 3. As the cavity 13 advances forward, the cross-sectional area of the cavity 13 gradually increases. For this reason, the acoustic impedance in the cavity 13 gradually changes along the axis of the bell 3. From this, a part of the sound wave traveling forward in the cavity 13 is reflected at each position in the axial direction of the bell 3. In addition, the sound wave that travels forward in the cavity 13 and hits the inner wall of the closed portion 12 is reflected backward by the inner wall of the closed portion 12. The reflected sound wave traveling backward interferes with the forward sound wave. Thereby, the energy of the sound wave is reduced in the cavity 13 and the sound is muted.

  When the silencer 1 is not attached, the end face of the bell 3 is acoustically a sound pressure node. In the state where the silencer 1 is mounted, the end surface of the bell 3 is closed by the disc-shaped closing portion 12, so that the end surface of the bell 3 is acoustically an antinode of sound pressure. For this reason, it seems that the pitch when the silencer 1 is worn and played is shifted from the pitch when the silencer 1 is played without wearing the silencer 1. However, in the silencer 1 according to the present embodiment, the pitch adjusting unit 23 is provided to prevent the pitch when the silencer 1 is worn and played from being deviated from the pitch when played without the silencer 1 being worn. doing.

  Thus, the silencer 1 according to the present embodiment has the closing portion 12 that closes the end face of the bell 3. A substantially annular fixing portion 25 is joined to the edge of the closing portion 12. An end portion on the outer peripheral side of the fixing portion 25 has a hook shape. When the silencer 1 is mounted, the outer peripheral end of the fixed portion 25 is hooked on the end 35 of the bell 3. As described above, it is presumed that the vibration at the time of blowing is originally small at the end 35 portion of the bell 3 as compared with the flare portion 37 in which the diameter of the tube is rapidly widened. The silencer 1 according to the present embodiment is fixed to the end portion 35 of the bell 3 where the vibration at the time of blowing is estimated to be originally small, and does not contact the flare portion 37 of the bell 3 where the vibration at the time of blowing is estimated to be large. Since the vibration at the end of the bell 3 is originally small, even if the silencer 1 is fixed to the end 35 of the bell 3, it affects the vibration of the bell 3, that is, the vibration of the flare 37 of the bell 3. Does not affect. That is, it is possible to avoid the vibration of the flare portion 37 of the bell 3 that is generated during blowing from being suppressed by the silencer.

  Therefore, by using the silencer 1 according to the present embodiment, even when the user plays with the silencer attached to the trumpet, the user is fed back to the user in the same manner as when playing without the silencer attached. Vibration and sound, in particular, vibration of the trumpet itself and sound from the outer wall of the bell 3 can be sufficiently received. For this reason, when the user wears the silencer 1 according to the present embodiment and plays the sound, the state of tension of the lip muscles and the state of breath blowing for each sound generation so that the pitch and volume are appropriate. The momentary adjustment can be performed in the same manner as when playing without a silencer, depending on the vibration of the trumpet itself and the sound from the outer wall of the flare portion 37 of the bell 3.

Second Embodiment
FIG. 4 is a longitudinal sectional view showing the structure of the silencer 1A according to the second embodiment of the present invention. The silencer 1A according to this embodiment is different from the silencer 1 according to the first embodiment in that a fixing portion 26 is further provided.

  The fixing part 26 is a member for fixing the pitch adjusting part 23 to the inner wall of the straight taper part 36 of the bell 3. As described in the first embodiment, the straight taper portion 36 is a portion that is estimated to have small vibration during playing. The fixing part 26 is a substantially rectangular parallelepiped block-shaped member. The fixing part 26 is formed of a material having appropriate hardness and appropriate flexibility, such as rubber, for example, like the fixing part 25. A plurality of fixing portions 26 are provided on the outer wall in the vicinity of the small diameter side end 23 b of the pitch adjusting portion 23. The fixing portions 26 are arranged in a distributed manner in the direction around the axis of the pipe 21. In this embodiment, although it arrange | positions every 90 degree | times of the direction around the axis | shaft of the pipe 21, the number and arrangement | positioning of the fixing | fixed part 26 are not restricted to this. In addition, there is an opening between the fixed portions 26.

  The pitch adjuster 23 is provided so that the fixed portion 26 contacts the inner wall of the straight taper portion 36 of the bell 3 when the silencer 1A is attached to the trumpet. That is, the pipe 21 to which the pitch adjusting unit 23 is fixed has such a length that the fixing unit 26 is in such a state.

  When using the silencer 1 </ b> A, the user inserts the silencer 1 </ b> A into the bell 3 from the pitch adjustment unit 23 side and positions the closing portion 12 on the end face of the bell 3, as in the silencer 1 according to the first embodiment. Then, the end portion on the outer peripheral side of the fixed portion 25 is attached to the edge winding portion 31 of the end portion 35 of the bell 3. Thereby, the closing part 12 is fixed to the edge winding part 31 of the end part 35 of the bell 3 by the fixing part 25. In the silencer 1A according to the present embodiment, when the end portion on the outer peripheral side of the fixing portion 25 is attached to the edge winding portion 31 of the end portion 35 of the bell 3, the fixing portion 26 provided on the outer wall of the pitch adjusting portion 23 is the bell. 3 in contact with the inner wall of the straight taper portion 36. Thereby, the pitch adjusting unit 23 is fixed to the straight taper portion 36 of the bell 3 by the fixing unit 26. Further, in the silencer 1A, the portions other than the fixing portions 25 and 26 do not contact the bell 3.

  The sound waves generated in the trumpet due to the blowing after the silencer 1A is mounted are between the outer wall of the pitch adjusting unit 23 and the bell 3 between the fixed portions 26 provided on the outer wall near the small diameter side end 23b of the pitch adjusting unit 23. It is transmitted to the gap between the inner wall and the gap 13 from the gap. The sound wave transmitted to the cavity 13 is silenced in the cavity 13 in the same manner as the silencer 1 according to the first embodiment. Moreover, the exhaled air which was blown into the trumpet by the blowing after the silencer 1A is mounted is discharged in the same manner as in the first embodiment.

Thus, in the silencer 1A according to the present embodiment, the fixing portions 25 and 26 for fixing the silencer 1A to the end portion 35 and the straight taper portion 36 of the bell 3 that are presumed that the vibration at the time of playing is originally small are provided. It has been. That is, the silencer 1A according to the present embodiment is the same as the silencer 1 according to the first embodiment in that the silencer 1A according to the present embodiment is not fixed to the flare portion 37 of the bell 3 that is presumed to have a large vibration during playing.
Therefore, the same effects as those of the first embodiment are obtained.

  Furthermore, since the silencer 1A according to the present embodiment is fixed to the bell 3 at each of the front end and the rear end of the silencer 1A, the silencer 1A is more stable than the silencer 1 according to the first embodiment. The effect of being fixed to the bell 3 is also achieved.

  In addition, the pitch adjuster 23 works to make the pitch adjuster 23 acoustically a node of sound pressure. For this reason, the vibration of the bell 3 is smaller at the position of the pitch adjusting unit 23 than at a position where the sound pressure is antinode. In the silencer 1A according to the present embodiment, the fixing unit 26 is provided in the pitch adjusting unit 23 that is acoustically a node of sound pressure and in which the vibration of the bell 3 is small. For this reason, even if the fixing portion 26 is brought into contact with the bell 3, the vibration of the bell 3 is not greatly affected.

<Other embodiments>
Although the first and second embodiments of the present invention have been described above, other embodiments are conceivable for the present invention. For example:

(1) In the first and second embodiments, the trumpet silencers 1 and 1A have been described as examples. However, similar silencers can be designed for silencers used for wind instruments other than the trumpet. Of course.

(2) In the first embodiment, the silencer 1 is fixed to the end portion 35 of the bell 3, and in the second embodiment, the silencer 1A is connected to the end portion 35 of the bell 3 and the straight taper portion 36 of the bell 3. It was fixed to both. However, the silencer may be fixed only at the straight taper portion 36 of the bell 3 without being fixed to the end portion 35 of the bell 3. The point is that a silencer that suppresses the vibration should not be fixed to the flare portion 37 of the bell 3 that is presumed to have a large vibration during blowing. In an embodiment in which the silencer is fixed only at the straight taper portion 36 of the bell 3, it is preferable that the end surface of the bell 3 is sealed by the closing portion 12. This is because by sealing the end face of the bell 3, the silencer can appropriately exhibit a silencing function.

(3) The closing parts 12 of the silencers 1 and 1A according to the first and second embodiments have a disk shape. However, the closing portion is not limited to a disk shape. For example, the closed portion may be formed in a curved shape such as a dish shape or a bowl shape. When the closed portion is curved, the pipe 21 may be provided on the concave surface side. In this aspect, compared to a silencer having a disk-shaped closing portion, it is possible to reduce the pitch when a sound is played with the silencer attached and from the pitch when the sound is played without the silencer attached.

(4) In the silencers 1 and 1A according to the first and second embodiments, the outer peripheral end of the fixing portion 25 whose outer peripheral end has a bowl shape is used as the edge winding 31 of the bell 3. The closing portion 12 was fixed to the end portion 35 of the bell 3 by hooking. However, the mode of fixing the closing portion 12 to the end portion 35 of the bell 3 is not limited to this. This is because it is sufficient that the closing portion 12 can be fixed to the end portion 35 of the bell 3. As another mode of fixing the closing portion 12 to the end portion 35 of the bell 3, for example, a string-like member (for example, a belt) is wound around the outer periphery of the end portion 35 of the bell 3, and the end portion 35 of the bell 3 is wound. The string-like member is fastened on the outer wall, and the outer end of the cloth-like member joined to the edge of the closing portion 12 is hooked on the string-like member to be folded, and the folded inner surface is hooked with a hook-and-loop fastener. The aspect of stopping is mentioned. In this aspect, the string-like member on the outer wall of the end portion 35 of the bell 3 is hooked on the wall surface on the rear side of the edge winding portion 31, and the closing portion 12 is connected to the end of the bell 3 via the cloth-like member fastened to the string-like member. It is fixed to the part 35. Also in this aspect, the same effects as those of the first and second embodiments are obtained.

(5) The fixing part 26 of the silencer 1A according to the second embodiment is provided on the outer wall of the small diameter side end 23b of the pitch adjusting part 23. However, the position where the fixing portion 26 is provided is not limited to the vicinity of the small diameter side end 23b. This is because the fixing portion 26 only needs to fix the pitch adjusting portion 23 to the inner wall of the straight taper portion 36 of the bell 3. For example, the fixing portion 26 may be provided on the outer wall of the large-diameter side end 23 a in the pitch adjusting portion 23.

  Moreover, since the fixing | fixed part 26 should just be able to fix the pitch adjustment part 23 to the inner wall of the straight taper part 36 of the bell 3, it is not the outer wall of the pitch adjustment part 23, but is provided behind the pitch adjustment part 23. May be. For example, the pipe 21 is extended behind the pitch adjusting section 23, and the fixing section 26 is provided on the outer wall at the tip of the extended pipe 21. According to this aspect, the fixing part 26 fixes the pitch adjusting part 23 to the inner wall of the straight taper part 36 of the bell 3 via the pipe 21. Therefore, also in this aspect, the same effect as in the second embodiment can be obtained.

  The straight taper portion 36 of the bell 3 is longer in the axial direction of the bell 3 than the flare portion 37. Since the fixing part 26 only needs to be able to fix the pitch adjusting part 23 to the inner wall of the straight taper part 36 of the bell 3, the pitch adjusting part 23 is fixed at any position in the axial direction of the bell 3 in the straight taper part 36. May be. Further, the axial position of the bell 3 of the fixing portion 26 may be adjusted by adjusting the length of the pipe 21 fixing the fixing portion 26 via the pitch adjusting portion 23.

(6) A member for hanging a finger (for example, a ring that can be inserted and hooked with an index finger) may be provided on the outer wall of the blocking portion 12. Accordingly, the user can easily remove the silencers 1 and 1A.

DESCRIPTION OF SYMBOLS 1,1A ... Silencer, 3 ... Bell, 12 ... Closure part, 13 ... Cavity, 15 ... Exhaust port, 21 ... Pipe, 22 ... Support part, 23 ... Sound adjustment part, 23a ... Large diameter side end, 23b ... Small diameter Side ends, 25, 26 ... fixed portion, 31 ... edge winding portion, 32 ... edge ring, 35 ... end portion of bell, 36 ... straight taper portion, 37 ... flare portion.

Claims (3)

A closing part for closing the end face of the bell of the wind instrument;
One end is fixed to the opening provided in the closing portion, and a pipe communicating the space inside the bell and the space outside the bell;
A pitch adjuster fixed to the other end of the pipe;
A fixing portion for fixing the blocking portion to an end of the bell;
A muffler characterized by comprising: A closing part for closing the end face of the bell of the wind instrument;
One end is fixed to the opening provided in the closing portion, and a pipe communicating the space inside the bell and the space outside the bell;
A pitch adjuster fixed to the other end of the pipe;
A fixing portion for fixing the pitch adjusting portion to the inner wall of the straight taper portion of the bell;
A muffler characterized by comprising: The silencer according to claim 2, wherein the fixing part is provided behind an outer wall of the pitch adjusting part or behind the pitch adjusting part.

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