WO2019088328A1 - Acoustic guitar and tone control apparatus - Google Patents

Abstract

The present invention relates to an acoustic guitar and a tone control apparatus, the acoustic guitar having a sound pillar insertion groove for allowing the tone control apparatus (or a sound pillar) to be easily and insertedly mounted on the acoustic guitar, and having a magnet insertedly fixed thereon. To this end, disclosed is the acoustic guitar comprising: an upper plate; a lower plate arranged so as to be spaced apart at a predetermined distance from the upper plate and to face the same; and loading grooves formed in an upper plate region and a lower plate region.

Description

Aerator and tone control

[0001] The present invention relates to a ventilation device and a tone color adjusting device, and more particularly, to a ventilation device having a sound filler insertion groove formed therein to easily insert a tone color adjusting device (or a sound filler) into a ventilator, The present invention relates to an air purifier and a color tone adjusting device.

A tone color adjusting device (hereinafter, referred to as a sound filler) for adjusting the tone of the ventilator supports between the upper plate and the lower plate area of the ventilator by adjusting the length in the longitudinal direction of the sound filler. The length adjustment is achieved by inserting a spring into the sound pillar or adjusting the length of the support of the sound pillar in the longitudinal direction using a control knob or the like. On the other hand, the sound filler is inserted through the sound hole of the ventilator. At this time, when the sound filler is mounted to the upper plate and the lower plate area of the ventilator through the sound hole 11, the user can not see the mounting position, and thus it is difficult to mount the sound filler correctly.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a sound pillar receiving groove (furthermore, a sound pillar guide groove) and a magnet in a sound pillar receiving groove, And it is an object of the present invention to provide an invention that allows a user to easily mount the device when the device is mounted.

The above-described object of the present invention can be achieved by providing a ventilator comprising a top plate, a bottom plate arranged to face the top plate at a distance from the top plate, and a seating groove formed in the top plate region and the bottom plate region.

It is still another object of the present invention to provide a vacuum cleaner comprising a body portion, a support portion having a first support portion coupled to one end of the body portion and a second support portion coupled to the other end of the body portion, And the tone of the ventilator is adjusted by being elastically supported in the lower plate area.

It is still another object of the present invention to provide a method of manufacturing a semiconductor device having a body portion, a tip portion having a first tip portion coupled to one end of the body portion and a second tip portion coupled to the other end of the body portion, And the length of the tip portion is adjusted in the upper and lower plate regions of the ventilator so as to adjust the tone of the ventilator.

According to the present invention as described above, since the sound pillar seating groove, the sound pillar guide groove, and the magnet are provided, it is possible for the user to easily mount the sound pillar inside the pillar.

Further, according to the present invention, by limiting the elastic modulus of the spring inserted into the sound pillar, it is possible to define a spring that can be applied to tone color adjustment of the air filter.

In addition, according to the present invention, the length of the sound filler can be freely adjusted.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.

FIG. 1 is a view illustrating a sound filler inserted into an air inlet according to an embodiment of the present invention,

FIG. 2 is an enlarged view of the sound filler insertion mounting region in FIG. 1,

FIG. 3 is a view showing an upper plate of the ventilator according to an embodiment of the present invention,

4 is a view showing numerical values of a sound pillar seating groove and a guide groove according to an embodiment of the present invention,

FIG. 5 is a bottom view of the ventilator according to an embodiment of the present invention,

FIG. 6 is a graph showing characteristics of each band of a weak spring according to an embodiment of the present invention, and FIG.

FIG. 7 is a graph showing characteristics of each band of a spring having a high elasticity according to an embodiment of the present invention, and FIG.

8 is a view showing a sound filler (or tone color adjusting device) according to an embodiment of the present invention,

9 to 10 are views showing a first embodiment of length control of a sound filler,

11 is a view showing a leaf spring,

12 to 13 are views showing a second embodiment of the length adjustment of the sound filler,

14 to 15 are views showing a body portion of the length adjusting portion,

16 is a view showing a lid portion of the length adjusting portion,

17 to 18 are views showing a third embodiment of the length adjustment of the sound filler,

19 is a view showing a body portion of the length adjusting portion,

20 is a view showing a cover portion of the length adjusting portion.

<Sound filler Insert groove  And Guide Home>

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the content of the present invention described in the claims, and the entire structure described in this embodiment is not necessarily essential as the solution means of the present invention. In addition, the description of the prior art and those obvious to those skilled in the art may be omitted, and the description of the omitted components and the function may be sufficiently referred to within the scope of the technical idea of the present invention.

The sound filler 300 according to an embodiment of the present invention is a detachable (or mountable) type speaker which enables a player or a user to adjust the tone of a string instrument such as a violin or an aerator, It is an accessory type tone control device for strings. Hereinafter, the ventilator 10 will be described as an example, but an embodiment of the present invention may be applied to a string instrument. The sound filler 300 may be formed of a first support part 310, a second support part 320, and a body part 330 (or a cap part) as shown in FIGS. The first support portion 310 and the second support portion 320 are fixed to the inside of the body portion 330 at one ends thereof as shown in the figure. The first support part 310 is fixedly supported in the area of the upper plate 100 of the ventilator and the second support part 320 is fixed and supported in the area of the lower plate 200 of the ventilator to control other tone colors. At this time, a sound pillar tip of various materials is mounted on the tip of the first support part 310 or the second support part 320. Depending on the material and shape of the tip of the sound filler, the tone of the ventilator changes. In addition, the first and second support portions 310 and 320 may have respective elastic lengths or elastic lengths. Therefore, when the sound filler 300 is mounted between the upper plate and the lower plate of the ventilator, it can be easily mounted. Various embodiments of the sound filler 300 described above are not separately described in the present application, but the contents disclosed in Korean Patent Application No. KR 10-2015-0068642 (entitled &quot; Tone Color Adjusting Device for String Instruments &quot;) filed by the present applicant All of which can be referred to in the present invention.

As described above, the sound pillar 300 for adjusting the tone of the ventilator is inserted between the upper plate 100 area and the lower plate 200 area of the ventilator 10, as shown in FIGS. 3 and 5, it is fixed between the upper plate bushing 110 and the lower plate bushing 210 (hereinafter, it can be described as being inserted and fixed between the upper plate and the lower plate). The user inserts the sound filler 300 through the sound hole 11 shown in FIG. 3 to mount and fix the sound filler 300 between the upper plate 100 and the lower plate 200, The tips of the tips of the first and second support portions 310 and 320 are inserted into the respective sound filler receiving grooves 120 and 220 formed in the lower plate bushing 210 to support the sound filler 300 between the upper plate and the lower plate. At this time, when the user inserts the sound filler 300 through the sound hole 11 and fixes the sound filler between the upper plate and the lower plate, it is often difficult to fix the sound filler to the respective sound filler receiving grooves 120 and 220. This is because not only the diameter of the sound filler receiving grooves 120 and 220 is small but also the position where the sound filler receiving groove is formed can not be directly seen by the user.

Therefore, in the present invention, a magnet is used to easily mount the sound filler 300, or the sound filler guide groove 130 is formed as shown in FIGS. 3 and 4. First, when a magnet is used, a magnet is inserted into the tip portion of the first support portion 310 of the sound pillar 300 or the tip portion of the second support portion 320. The magnets are also inserted into the first and second support portions 310 and 320 and the sound filler receiving grooves 120 and 220 into which the first and second support portions 310 and 320 are inserted. When the user brings the sound pillar 300 to the sound pillar seating grooves 120 and 220, the sound pillar 300 can easily be seated in the sound pillar seating groove by the magnetic force.

3, a sound pillar seating groove 120 is formed in the upper plate bushing 110 and a sound pillar guide groove 130 for guiding the sound pillar 300 to the sound pillar seating groove 120 . 3 shows the upper plate 100 of the ventilator 10 in which the upper plate first bushing 111 and the upper plate second bushing 112 are provided on the lower surface of the upper plate 100 as " Quot; shape. Of course, in addition to the first and second bushings, additional top bushings may be further disposed. At this time, the first and second bushings 111 and 112 are arranged in an " X " shape so as to pass near the sound hole 11. The upper plate bushing 110 may be formed in various forms according to the model of the ventilator 10, and FIG. 3 according to the present invention is merely one embodiment. The sound pillar seating groove 120 into which the sound pillar 130 is inserted is formed at the intersection of the " X-shaped " It is preferable that the sound filler seating groove 120 is formed at approximately 2 to 5 cm from the nearest outer point of the sound hole 11. [ The sound filler guide groove 130 may be formed at a predetermined depth in a direction in which the sound filler receiving groove 120 is located from a direction in which the sound hole 11 is located. The sound filler guide groove 130 is formed at a predetermined depth (as described below, approximately 1.5 mm deep) in the longitudinal direction of the ventilator from the one-way end point of the intersection region of the " X- Accordingly, when the user inserts the sound filler 300 into the sound hole 11, the first support portion 310 of the sound filler is naturally guided along the sound filler guide groove 130, Can be seated.

As shown in FIG. 4, a sound pillar seating groove 120 and a sound pillar guide groove 130 are formed in the upper plate bushing 110. At this time, the groove diameter of the sound filler receiving groove 120 is approximately 3 mm, and the groove depth of the sound filler receiving groove 120 is approximately 3 mm. At this time, the groove depth of the sound filler guide groove 130 is approximately 1.5 mm. Each of the above-mentioned numerical values may vary slightly depending on various models of the ventilator 10 and the kind of the sound filler (or the tip type of the sound filler). Meanwhile, as described above, the magnet can be inserted into the sound filler receiving groove 120. When the magnet is inserted, it should be fixed firmly to the sound pillar seating groove 120, and the depth of the sound pillar seating groove 120 may be deeper in consideration of the thickness of the magnet.

As shown in FIG. 5, a lower plate bushing 210 is formed on the upper surface of the lower plate 200 of the ventilator 10 in the horizontal and vertical directions. The first, second, third, and fourth bushings 211, 212, 213, and 214, which are the lateral bushings, are disposed on the lower plate 200 of the ventilator while being spaced apart from each other by a predetermined distance, and the fifth bushing 215, As shown in FIG. The sound pillar seating groove 220 formed on the lower plate 200 is formed on the fifth bushing 215 and is preferably formed at a position corresponding to the sound pillar seating groove 120 of the upper plate shown in Fig. Do. The diameter and the depth of the sound pillar seating groove 220 of the lower plate are to be replaced with the description of the sound pillar seating groove 120 of the upper plate. On the other hand, the magnet may be disposed in the sound filler receiving groove 220 of the lower plate. Therefore, the second supporting portion 320 can easily be seated in the sound filler receiving groove 220 of the lower plate by the magnetic force acting between the magnet inserted and disposed in the tip portion of the second supporting portion 320.

Also, if necessary, the lower plate 200 may be provided with a sound pillar guide groove in the longitudinal direction of the ventilator. Therefore, when the user inserts the sound filler 300 into the sound hole 11, the second support portion 320 is seated in the sound filler mounting groove 220 of the lower plate, and the first support portion 320 is inserted into the sound filler guide groove 130 of the upper plate. The supporting portion 310 is guided and the first supporting portion 310 is finally seated in the sound filler receiving groove 120 of the upper plate.

<Elastic modulus of spring>

In the Korean Patent Application No. KR 10-2015-0068642 filed by the present applicant, a position adjusting unit is known in the art, and the position adjusting unit is elastically supported by the first supporting unit 310 or the second supporting unit 310. [ (320), and thereby, pushes the upper plate and the lower plate of the ventilator using elasticity and supports the same. At this time, the position adjusting unit may be embodied as a spring or a spring. It is preferable that the elastic modulus of the spring has a value within a range of approximately 0.1 to 2 (N / mm), more preferably the spring having a weak elastic modulus has a value within a range of 0.2 to 0.6 (N / mm) It is preferable that the spring having a good elasticity has a value within a range of 1.15 to 1.55 (N / mm) in elastic modulus. As shown in FIG. 6, as the spring having a weak elasticity (that is, the elastic modulus is lowered) is used, the value of the high-frequency region in the 8 to 16 kHz region decreases as a whole, and the value in the middle region of 125 to 250 kHz Overall up. As shown in FIG. 7, as the spring having a high elasticity (that is, the elasticity coefficient is increased) is used, the value of the high-frequency range in the 8 to 16 kHz range is generally increased and the value of the low- Lower. Therefore, the values of the various frequency ranges can be adjusted according to the elastic modulus value of the spring.

<Sound filler length control>

(Embodiment 1)

The sound filler 300 includes first and second tip portions 310 and 320 and a cap portion 330 as shown in FIG. At this time, the cap portions are separated from each other by the first and second cap portions 331 and 332. When an external force is applied to one of the cap portions, any one of the tip portions is moved in the longitudinal direction to adjust the length. Hereinafter, for convenience of explanation, it is assumed that the first tip portion 310 is moved in the longitudinal direction by applying an external force to the first cap portion 331. FIG.

In the first embodiment, the length of the first cap portion 331 is adjusted by pushing and pulling by the external force. 9 to 11, the first cap portion 331 is disposed on the left side of the partition portion 353 and is pushed and pulled by an external force, and the second cap portion 332 is disposed on the right side of the partition portion 353 And is threadedly engaged with the threaded portion 354. The first and second tip portions 310 and 320 are inserted into the first and second holder portions 341 and 342 and the first and second holder portions 341 and 342 are inserted into one end region of the first and second cap portions 331 and 332. Accordingly, the sound filler has a substantially symmetrical shape.

The first and second cap parts 331 and 332 are hollow. A spring 370 is inserted into the inner space of the second cap portion 332 between the length adjusting portion 350 and the second holder portion 342 so that the second tip portion 320 is elastically inserted into the upper surface of the ventilator. Or the bottom plate.

A recess 351 is formed on the left side of the body of the length adjuster 350. A partition wall 353 is formed at a substantially central portion of the length adjuster 350 and a threaded portion 354 is screwed to the second cap 352, . The first cap portion 331 is disposed on the left side with respect to the partition wall portion 353, and the second cap portion 332 is disposed on the right side. The leaf spring 352 is disposed in the space between the rear surface of the first holder 341 and the front surface of the length adjuster 350 and the inner surface of the first cap 331 and the top surface of the recess 351, As shown in FIG. Accordingly, when external force (pushing and pulling) is applied to the first cap portion 331, the length of the bent portion 352a of the leaf spring portion is adjusted by moving in the longitudinal direction along the concave / convex portion 351. The adjustment length in steps may vary depending on the number and spacing of the concave-convex portions 351.

The plate spring portion 352 is composed of four leg portions which are bent downward from a substantially central portion so that the four leg portions are arranged so as to surround the concave and convex portions 351 in the circumferential direction. A bent portion 352a is formed at an end portion of each leg.

(Second Embodiment)

In the second embodiment, the first cap portion 431 and the cover portion 452 are rotated by an external force to adjust the length. 12 to 16, the first cap portion 431 is disposed on the left side of the partition portion 451c and rotated by an external force, and the second cap portion 432 is disposed on the right side of the partition portion 451c And is screwed to the threaded portion 451d. The first and second tip portions 410 and 420 are inserted into the first and second holder portions 441 and 442 and the first and second holder portions 441 and 442 are inserted into the first end portions of the first and second cap portions 431 and 432. Accordingly, the sound filler has a substantially symmetrical shape.

The first and second cap portions 431 and 432 are hollow. A spring 470 is inserted between the body portion 451 and the second holder portion 442 in the inner space of the second cap portion 432 so that the second tip portion 420 elastically contacts the upper plate of the ventilator To be supported on the lower plate.

A length adjusting guide groove 451a is formed in a left side surface of the body portion 451 of the length adjusting portion and a partition wall portion 451c is formed at a substantially central portion of the length adjusting guide groove 451a. (451d) is formed. The length adjustment guide groove 451a is formed along the longitudinal direction on the left side of the body portion, and is formed at a predetermined angle. That is, as shown in FIG. 14, a diagonal groove is formed in the other direction from one side. Depending on the direction or angle of the oblique line, the adjustment length may vary depending on the step, and the oblique line may be curved. A stop guide groove 451b is formed on the left side surface of the body portion. The stop guide grooves 451b are linearly formed in the longitudinal direction. The left side surface of the body portion 451 is inserted into the lid portion 452. The cover 452 is disposed in the space between the inner surface of the first cap portion 431 and the left surface of the body portion. The lid portion 452 is formed at a position where the length adjustment guide portion 452a and the stop projection 452b correspond to each other at one end region as shown in Fig. When the first cap portion 431 and the lid portion 452 are rotated by the external force, the length adjustment guide portion 452a moves along the length adjustment guide groove 451a, thereby adjusting the length of the sound filler. That is, for example, if the sound pillar is rotated in the clockwise direction, the entire length of the sound pillar is lengthened. If the sound pillar is rotated in the counterclockwise direction, the length of the sound pillar is shortened. However, a stop portion (step portion) is further formed in the end region of the length adjusting guide groove 451a for restricting the rotation, thereby preventing the length adjusting guide portion 452a from moving further.

(Third Embodiment)

In the third embodiment, the first cap portion 531 and the cap portion 552 are pulled (or pushed) and rotated by an external force to adjust the length. 17 to 20, the first cap portion 531 is disposed on the left side of the partition wall portion 551b, and the second cap portion 532 is disposed on the right side of the partition wall portion 551b with the threaded portion 551c ). The first and second tip portions 510 and 520 are inserted into the first and second holder portions 541 and 542 and the first and second holder portions 541 and 542 are inserted into one end region of the first and second cap portions 531 and 532. Accordingly, the sound filler has a substantially symmetrical shape.

The interior of the first and second cap portions 531 and 532 is hollow. A spring 570 is inserted between the body portion 551 and the second holder portion 542 in the inner space of the second cap portion 532 so that the second tip portion 520 elastically contacts the upper plate To be supported on the lower plate.

A length adjusting guide groove 551a is formed in a left side surface of the body portion 451 of the length adjusting portion and a partition wall portion 551b is formed at substantially the center. (Not shown). 19, the length adjusting guide groove 551a is formed in the left side of the body portion along the longitudinal direction with a groove (or an embossed shape) of an " E &quot; character shape as shown in Figure 19. Depending on the interval of the length adjusting guide groove 551a The left side of the body portion 551 is inserted into the lid portion 552.

Therefore, the lid portion 552 is disposed in the space between the inner surface of the first cap portion 531 and the left surface of the body portion. The lid portion 552 has a length adjusting guide portion 552a formed at one end region as shown in FIG. When a plurality of length adjusting guide grooves 551a are formed, a plurality of length adjusting guide portions 552a are formed so as to correspond to the length adjusting guide grooves 551a. The length adjustment guide portion 552a is moved along the E-shaped groove 551a to achieve the adjustment of the length of the sound filler in stages. The length adjustment guide portion 552a When the first cap portion 531 is rotated clockwise as an example, the length adjusting guide portion 552a is moved in the horizontal direction. At this time, when the first cap portion 531 is pulled in the longitudinal direction, The adjustment guide portion 552a moves. When the first cap portion 531 is rotated in the counterclockwise direction again after the desired length is pulled, the length adjustment guide portion 552a is moved again in the horizontal direction to adjust the length.

All the contents described in Korean Patent Application No. KR 10-2015-0068642 filed by the present applicant (title of the invention: tone color adjusting device for string instruments) can be included in the contents of the present application in order to support the above description.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to be exemplary only and are not restrictive of the invention, It will be possible.

The configuration and functions of the above-described components have been described separately from each other for convenience of description, and any of the components and functions may be integrated with other components or may be further subdivided as needed.

Although the present invention has been described with reference to the embodiment thereof, the present invention is not limited thereto, and various modifications and applications are possible. In other words, those skilled in the art can easily understand that many variations are possible without departing from the gist of the present invention. In the following description, well-known functions or constructions relating to the present invention as well as specific combinations of the components of the present invention with respect to the present invention will be described in detail with reference to the accompanying drawings. something to do.

[Description of Symbols]

(Sound groove), sound hole, sound hole, sound hole, sound hole, 100: upper plate, 110: upper plate bushing, 111: top plate first bushing, 112: upper plate second bushing, A lower plate first bresing, a lower plate second bresing, a lower plate second bresing, a lower plate third bresing, a lower plate fourth bresing, a lower plate fifth bresing, A sound pillar mounting groove (insertion groove or support seat groove) 300: a sound filler 310: a first support portion 320: a second support portion (second tip portion) 330: a body portion (or a cap portion) 331 A first cap portion 332 a second cap portion 340 a holder portion 341 a first holder portion 342 a second holder portion 350 a length adjusting portion 351 a recessed portion 352 a leaf spring portion 352a a bent portion A first screw portion (or a first screw portion), 362 a second screw portion (or a second screw portion), 370 elastic portions, and 410 a first support portion 1 tip portion), 420: second support portion A second cap part 431 a first cap part 432 a second cap part 440 a holder part 441 a first holder part 442 a second holder part 450 a length adjuster 451a is a length adjusting guide groove, 451b is a stop guide groove, 451c is a partition wall portion, 451d is a thread engaging portion, 452 is a lid portion, 452a is a length adjusting guide portion, 452b is a stopping projection, 530: a body part (or a cap part); 531: a first screw part (or a first coupling part); 470: an elastic part; 510: a first supporting part (first tip part) A cap portion 532 a second cap portion 540 a holder portion 541 a first holder portion 542 a second holder portion 550 a length adjusting portion 551 a body portion 551a a length adjusting guide groove 551b a partition wall portion , 551c: screw-engaging portion, 552: lid portion, 552a: length adjusting guide portion, 561: first screw portion (or first engaging portion), 570: elastic portion

Claims (22)

1. Top plate,

   A lower plate disposed so as to face the upper plate at a distance from the upper plate,

   And a seating groove formed in the upper plate region and the lower plate region.
2. The method according to claim 1,

   The seating groove

   And a sound filler which is supported between the upper plate region and the lower plate region and adjusts a tone color is inserted.
3. 3. The method of claim 2,

   The upper and lower plates are each provided with a bushing,

   And a sound filler seating groove is formed in each of the upper plate bushing and the lower plate bushing.
4. The method of claim 3,

   The upper plate bushing is arranged in an X-shape,

   And a sound filler receiving groove of the upper plate is formed at an intersection of the X-shaped breathing.
5. 5. The method of claim 4,

   Further comprising a sound filler guide groove formed at a predetermined depth in a direction in which the sound filler receiving groove of the upper plate is positioned, from a direction in which the sound hole of the air filter is located,

   Wherein the sound pillar guide groove guides the support portion of the sound pillar when the sound pillar is inserted.
6. 5. The method of claim 4,

   The sound-filler-

   Is formed at the intersection of the X-shaped breathing at about 2 to 5 cm from the nearest outer point of the sound hole of the ventilator.
7. 5. The method of claim 4,

   The X-

   Wherein the ventilation hole is disposed in an X-shape so as to be spaced apart from the ventilation sound hole.
8. The method of claim 3,

   The lower plate bushing

   Respectively, in the horizontal direction and the vertical direction,

   And a sound pillar receiving groove of a lower plate is formed on the lower plate bushing in the longitudinal direction.
9. 9. The method of claim 8,

   The sound-filler-seating groove of the lower plate,

   Wherein the sound pipe is formed at a position corresponding to the sound filler mounting groove of the upper plate.
10. The method of claim 3,

    Wherein a magnet is inserted and fixed in at least one of the seat pillar receiving grooves of the upper plate and the sound pillar receiving grooves of the lower plate, thereby guiding the supporting portion of the sound pillar by the magnetic force when the sound pillar is inserted.
11. Body portion,

    And a support portion having a first support portion coupled to one end of the body portion and a second support portion coupled to the other end of the body portion,

    Wherein at least one of the support portions is elastically supported in an upper plate and a lower plate region of the ventilator to adjust the tone of the ventilator.
12. 12. The method of claim 11,

    A spring is inserted in the body portion to elastically support the support portion,

    And the elastic modulus of the spring has a value of 0.1 to 2 (N / mm).
13. 12. The method of claim 11,

    Wherein a magnet is inserted and arranged at a tip of at least one of the first support portion and the second support portion so that the tone color adjustment device is guided to the support portion seat by a magnetic force when the tone color adjustment device is inserted into the ventilator.
14. 14. The method of claim 13,

    And a magnet is inserted and fixed in the support receiving groove.
15. Body portion,

    A tip portion having a first tip portion coupled to one end of the body portion and a second tip portion coupled to the other end of the body portion,

    And a length adjuster for moving at least one of the tips of the tips in the longitudinal direction by an external force,

    Wherein the tip portion adjusts the tone of the ventilator by adjusting the length of the upper plate and the lower plate of the ventilator to adjust the tone of the ventilator.
16. 16. The method of claim 15,

    The length adjuster is configured to adjust,

    And the length is adjusted by pulling and pulling, or adjusted by being rotated, pulled, and rotated.
17. 17. The method of claim 16,

    The length adjuster, which is adjusted in length by pushing and pulling,

    A concave / convex portion provided on one side of the body,

    A plate spring portion that moves in the longitudinal direction relative to the concavo-convex portion by an external force, and

    And a screw coupling portion provided on the other side of the body.
18. 17. The method of claim 16,

    The length adjuster, whose length is adjusted by rotation,

    A body portion having a length adjusting guide groove formed at one side of the body at a predetermined angle in the longitudinal direction and a threaded portion provided at the other side of the body,

    And a lid part having a length adjusting guide part guided along the length adjusting guide groove by an external force.
19. 17. The method of claim 16,

    The length adjuster, which is length-controlled by pulling and rotating,

    A body portion having a length adjusting guide groove provided on one side of the body with an E-shaped groove and a screw engaging portion provided on the other side of the body,

    And a lid part having a length adjusting guide part guided along the length adjusting guide groove by an external force.
20. 18. The method of claim 17,

    The leaf spring portion

    Wherein a plurality of legs bent downward from the central portion are formed, and the leg portion is disposed so as to surround the concave-convex portion.
21. 19. The method of claim 18,

    One side of the body portion provided with the length adjusting guide groove is inserted into the lid portion,

    Wherein the length adjusting guide groove is formed in an oblique line.
22. 20. The method of claim 19,

    Wherein the adjustment of the length of each of the E-shaped grooves is varied according to a longitudinal direction interval of the E-shaped grooves.

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