JPH0664460B2 - Recorder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recorder, and more particularly to a recorder having a built-in sensor for detecting a physical quantity in a pipe such as a musical sound. The recorder has improved operation reliability of the sensor. Regarding

<Prior Art> Performance sounds of a musical instrument are generally collected by a microphone arranged at a predetermined position outside the musical instrument. Even in the recorder, the performance sound is collected by the recorder, that is, the microphone fixed at a predetermined position apart from the player, but the relative position with respect to the microphone changes as the player moves, and the sound is collected. There was an inconvenience that the level fluctuated. Therefore, the applicant of the present application proposes, in the specification submitted on the same date as the invention of the present application, a recorder in which a sensor capable of detecting a physical quantity inside the head tube is incorporated. For example, as one mode, this recorder is provided with a microphone that collects a musical sound as a sensor in a block fitted to the head tube body, and collects the musical sound at a constant sound collecting level without affecting the musical sound. Configured to be able to.

<Problems to be Solved by the Invention> However, in this recorder, the solid vibration caused by the finger movement for opening and closing the sound hole is transmitted to the microphone via the head tube or the like, and the microphone emits the solid vibration. However, if the recorder is dropped on the floor, the impact force may be transmitted to the microphone and the microphone may be damaged. There is also a problem that moisture in the breath of the performer adheres to the microphone and deteriorates the microphone.

Therefore, an object of the present invention is to provide a sensor-incorporated recorder with improved sensor operation reliability.

<Means for Solving Problems> The recorder according to the invention described in claim 1 is
A hollow tube having a window and a plurality of sound holes formed therein, a block having an inner hole defining surface which defines the inner hole of the tube and which is disposed at an end of the tube, and an air vibration generated in the inner hole of the tube. A sensor provided with a sound collecting portion for detecting, and a sensor embedded in the block so that the position of the surface of the sound collecting portion in the axial direction of the tubular body is substantially the same as the position of the surface defining the inner hole in the axial direction of the tubular body, and this sensor. Is provided on the front surface of the block, and the surface thereof has a moisture-proof means that is substantially flush with the inner hole defining surface of the block.

The invention described in claim 2 is the recorder according to claim 1, characterized in that the sensor is provided with a vibration isolator.

<Operation and Effect> In the recorder according to the invention of claim 1, when the performer blows exhaled air into the tube hole and opens and closes the sound hole during performance, the air column of the tube hole resonates, A musical sound of a predetermined pitch is generated. The antinode of vibration of the air column in the pipe inner hole always occurs in the vicinity of the inner hole defining surface of the block near the window (end of the pipe body) regardless of the pitch. That is, the sensor located at this location can always detect the antinode of the air column. Therefore, in the recorder according to the present invention, it is possible to detect the musical sound of the recorder at a constant level at any pitch.

Further, since the moisture-proof means is provided on the front surface of the sensor so that the surface thereof is flush with the inner hole defining surface of the block, the vibration of the air column generated in the inner hole of the pipe is obstructed by disposing the sensor. There is no. Therefore, it is possible to detect a musical sound without damaging the timbre of the main body of the recorder.

Furthermore, the sensor is protected by the moisture proof means. Therefore, it is possible to prevent the deterioration of the sensor due to the water in the exhaled air that has flowed into the tube inner hole adhering to the sensor, and the reliability of the sensor is improved.

In the recorder according to the invention described in claim 2, the sensor is protected by the vibration isolator. Therefore, even if vibration occurs due to the finger movement that opens and closes the sound hole, this vibration is difficult to transmit to the sensor, and the sensor does not detect unnecessary noise. Further, even if the recorder is accidentally dropped, the sensor is protected by the vibration isolator, so that the sensor can be prevented from being damaged by the impact force of the drop.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

1 and 2 show a recorder according to an embodiment of the present invention. FIG. 1 is an overall view in which a part is sectioned, and FIG. 2 is an enlarged view of a main part.

In FIG. 1, reference numerals 41, 42, and 43 respectively indicate a head tube, a middle tube, and a foot tube that form a tubular body, and the head tube 41 is a block 45 at one end of a hollow head tube body 44. It is configured by inserting. Since the groove is formed on the outside of the block 45, a window ray 46 is defined between the head tube main body 44 and the block 45. Also, a window is provided at one end of the head tube body 44.
47 is formed, and an edge 48 projects from the window 47 and faces the outlet end of the window ray 46. Since one end side end surface of the head tube body 44 that defines the window 47 is located on the same plane as the inner end surface of the block 45, the head tube body 44 and the block 45 communicate with the outside air through the window 47. Defining an inner bore 49 for The above-mentioned block 45 has a hole 51 opened at its inner end surface.
As shown in detail in FIG. 2, a microphone 52 (for example, a condenser type) for collecting the musical sound in the inner hole 49 is formed in the hole 51 by a vibration-proof rubber (vibration-proofing means) such as polyurethane. It is inserted and fixed through 99. This microphone
52 is covered with a polyethylene film (moisture-proof means) 98 adhered to the block 45 and faces the inner hole 49, and its sound collecting surface is located substantially on the same plane as the inner end surface of the block 45.
The wiring 53 connected to the microphone 52 is connected to a signal processing device (not shown) such as a sound system through a hole (not shown) formed in the block 45 and the head tube main body 44.

On the other hand, the middle tube 42 is composed of a hollow tube,
The head tube 41 is fitted at one end thereof. A plurality of sound holes 55a to 55f, which communicate with the inner hole 54 defined inside and the outside air, are formed at a predetermined interval on the wall of the middle tube 42, and a thumb hole is formed substantially behind the sound hole 55a. 56 is drilled.

On the other hand, the foot tube 43 is configured by a hollow tube having an outer shape that gradually expands, and one end of the foot tube 43 is fitted to the other end of the middle tube 42. Therefore, the inner hole of the foot tube 43 is
The inner hole 54 of the head tube 41 and the inner hole 49 of the head tube 41 are communicated with each other. One end of the inner tube 49, 54 and the like is communicated with the outside air through the window 47, and the other end is the foot tube 43. An air column communicating with the outside air is formed at the other end or any of the sound holes 55a to 55f.

Next, the operation of this embodiment will be described.

In such a recorder, when the performer opens and closes the sound holes 55a to 55f while inhaling from the window ray 46 during performance, the air in the inner hole 49 resonates to generate a musical sound of a predetermined scale, and the microphone 52 collects a musical sound in the inner hole 49.
Therefore, even if the player moves, the sound collection level does not change, and the musical sound can be collected at a constant sound collection level.

On the other hand, during this performance, the sound holes 55a to 55f by the performer are
Solid vibration is generated in the middle tube 42 and the like due to the opening and closing finger movement, and this solid vibration propagates toward the microphone 52 through the head tube main body 44, the block 45, and the like. However, an anti-vibration rubber 99 is placed between the block 45 and the microphone 52.
Since the microphone is interposed, the microphone 52 hardly collects solid vibration as a sound, and only musical sound can be collected. Further, even if the recorder is accidentally dropped, the impact force will not damage the microphone.

Further, the exhaled air blown into the inner hole 49 contains a large amount of water, but since the microphone 52 is covered with the polyethylene film 98, water does not adhere to the microphone 52 and the microphone 52 It is possible to prevent deterioration and improve durability.

Although the microphone 52 and the anti-vibration rubber 99 are covered with the polyethylene film 98 in the above-described embodiment,
Microphone covered by polyethylene film 98
It is also possible to support 52 on the rubber cushion 99 block 45.

Further, in the above-mentioned embodiment, the vibration isolator is composed of the rubber 99 of urethane, and the moistureproof means is composed of the polyethylene film 98, but the urethane and the polyethylene film are only one example. It is needless to say that the moisture-proof means can be integrally formed of a foam having a non-foamed integral skin layer on the surface, and the present invention can be achieved by using other materials. Furthermore, the present invention may be applied to the case where another sensor such as a piezoelectric element is used instead of the microphone.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a recorder according to an embodiment of the present invention, and FIG. 2 is an enlarged sectional view of an essential part shown in FIG. 41 …… Head tube 42 …… Center tube 43 …… Foot tube 44 …… Head tube body 45 …… Block 46 …… Window ray 47 …… Window 49 …… Inner hole 52 …… Microphone (sensor) 55a , 55b, 55c, 55d, 55e, 55f …… Sound hole 98 …… Polyethylene film (moisture-proof means) 99 …… Vibration-proof rubber (vibration-proof means)

Claims (2)

[Claims] 1. A hollow tube body having a window and a plurality of sound holes formed therein, a block provided at an end of the tube body, the block having an inner hole forming surface for defining the tube inner hole, and the tube inner hole. A sensor provided with a sound collecting portion for detecting air vibrations generated and embedded in the block such that the position of the surface of the sound collecting portion in the axial direction of the pipe is substantially the same as the position of the surface defining the inner hole in the axial direction of the pipe. A recorder provided on the front surface of the sensor, the moistureproof means having a surface substantially flush with the inner hole defining surface of the block. 2. The recorder according to claim 1, wherein the sensor is provided with a vibration isolation means.