Adjustable flute head and flute

Abstract

The utility model relates to an adjustable flute head and a flute. The adjustable flute head comprises a flute head tube and a movable sleeve. The flute head pipe is provided with a through hole and a blowing hole; the flute head tube is sleeved with the movable sleeve, a membrane hole is formed in the tube wall of the movable sleeve and used for covering the flute membrane, and the movable sleeve can move relative to the flute head tube so that the membrane hole can be selectively overlapped with the through hole or the tube wall of the movable sleeve. The flute comprises the adjustable flute head and a pipe body, and the pipe body is detachably connected with the adjustable flute head. According to the adjustable flute head, the flute can make flute sounds with different timbres only by driving the movable sleeve to move, operation is simple, membrane holes do not need to be formed in the flute body, the risk that the flute body is damaged is reduced, and cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of musical instruments, and particularly to an adjustable mouthpiece and a flute. Background Art

[0002] The Chinese bamboo flute is a main member of the national musical instrument family and one of the most beloved musical instruments of the Chinese people. In the production of Chinese bamboo flutes, there is a production technique that has been passed down in Chinese history for nearly two thousand years. That is, when making a bamboo flute, a hole similar in size to the finger hole is dug between the blowing hole of the bamboo flute and the finger hole closest to the blowing hole. This hole is used to stick a piece of bamboo core or aloe core membrane on it when playing the bamboo flute. This will change the tone of the bamboo flute. After the bamboo flute is made through this process, the sound blown out is very different from the previous sound. The flute sound will become bright and pleasant. The volume will increase, and the sound will be more expressive and more individualized.

[0003] The Western flute has been introduced to China for a hundred years. The twelve-tone equal temperament opening holes and Boehm-style keys of the flute make it easy for players to transpose and play semitones. Comparatively speaking, each has its own advantages and disadvantages. The tone of the flute is significantly different from that of the bamboo flute and has different charms.

[0004] There is no clear boundary between the flute and the bamboo flute. In the 1980s, some musicians tried to open holes on the flute to make the flute produce a sound similar to that of the bamboo flute. However, when it is necessary to play the original tone of the flute again, it is necessary to block the holes with other objects. In this way, the operation is very inconvenient. Moreover, the membrane holes of this kind of flute are opened on the flute body, and the cost of the flute body is relatively high. Slight errors in making the membrane holes will cause the entire flute to be scrapped, and the risk is relatively high. Summary of the Invention

[0005] Based on this, in view of the problems of inconvenient operation for switching the tone of a flute with membrane holes and high production costs, it is necessary to provide an adjustable mouthpiece and a flute.

[0006] On the one hand, the present application provides an adjustable mouthpiece for connecting the tube body of a flute. The adjustable mouthpiece includes:

[0007] A mouthpiece tube, which is provided with a through hole and a blowing hole;

[0008] A movable sleeve, sleeved on the mouthpiece tube. The tube wall of the movable sleeve is provided with a membrane hole for covering the flute membrane. The movable sleeve can move relative to the mouthpiece tube so that the membrane hole overlaps with the through hole or overlaps with the tube wall of the movable sleeve.

[0009] In one of the embodiments, the flute head tube is further provided with an operation window, and the operation window is arranged on the tube wall of the flute head tube, so that the flute membrane can enter the flute head tube through the operation window and be attached to the inner wall of the flute head tube and cover the through hole.

[0010] In one of the embodiments, the flute head tube is provided with a first ventilation hole and a second ventilation hole, and along the length direction of the flute head tube, the projected distance between the first ventilation hole and the blowing hole is smaller than the projected distance between the second ventilation hole and the blowing hole; the movable sleeve is provided with a first membrane hole and a second membrane hole, and along the length direction of the flute head tube, the projected distance between the first membrane hole and the second membrane hole is equal to the projected distance between the first ventilation hole and the second ventilation hole; and a line connecting the center of the first membrane hole and the center of the second membrane hole intersects with a line connecting the center of the first ventilation hole and the center of the second ventilation hole, so that when the flute head tube and the movable sleeve move relatively to the point where the first membrane hole overlaps with the first ventilation hole, the second membrane hole does not overlap with the second ventilation hole.

[0011] In one of the embodiments, the movable sleeve is further provided with a third membrane hole and a fourth membrane hole, and in the length direction of the flute head tube, the projection distance between the third membrane hole and the first ventilation hole is equal to the projection distance between the fourth membrane hole and the second ventilation hole, so that when the flute head tube and the movable sleeve move relatively to the point where the third membrane hole overlaps with the first ventilation hole, the fourth membrane hole overlaps with the second ventilation hole.

[0012] In one embodiment, the movable sleeve is provided with a fifth membrane hole and a sixth membrane hole, and the fifth membrane hole and the sixth membrane hole are arranged along the moving direction of the movable sleeve, and when the mouthpiece tube and the movable sleeve move relatively, the through hole selectively overlaps with the fifth membrane hole or the sixth membrane hole.

[0013] In one embodiment, the adjustable mouthpiece further comprises a sealing ring, which is sleeved on the mouthpiece tube and abuts against an end of the movable sleeve.

[0014] In one embodiment, the adjustable mouthpiece further comprises a first limit member, which is arranged on the outer peripheral side of the mouthpiece tube and located between the through hole and the blowing hole, and the first limit member abuts against the side of the sealing ring away from the movable sleeve to limit the movement of the sealing ring in the direction close to the blowing hole.

[0015] In one embodiment, the first limiting member is in a ring shape, and the first limiting member is interference fit with the mouthpiece tube.

[0016] The adjustable mouthpiece described in the present application is configured such that a movable sleeve provided with a membrane hole is sleeved on the mouthpiece tube. When the movable sleeve is driven to move relative to the mouthpiece tube, the membrane hole can be aligned or not aligned with the through hole. When the membrane hole is aligned with the through hole, the sound produced by the flute has a timbre similar to that of a bamboo flute; when the membrane hole is not aligned with the through hole, the sound produced by the flute has the original timbre of the flute. In this way, the performer only needs to drive the movable sleeve to move during the performance to make the sound produced by the flute have two timbres, which is simple to operate. On the other hand, the membrane hole is provided on the mouthpiece, and there is no need to process the flute body, which reduces the risk of damage to the flute body and reduces costs.

[0017] On the other hand, the present application also provides a flute, comprising a tube body and the above-mentioned adjustable mouthpiece, wherein the tube body is detachably connected to the adjustable mouthpiece.

[0018] In one of the embodiments, a second limiting member is further included. The second limiting member is in a ring shape and is sleeved on the mouthpiece tube. When the tube body and the adjustable mouthpiece are in an installed state, the tube body abuts against a side of the second limiting member that is away from the movable sleeve, so that the second limiting member stops at the movable sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of an adjustable mouthpiece in one embodiment of the present application.

[0020] Figure 2 It is an exploded view of an adjustable mouthpiece in one embodiment of the present application.

[0021] Figure 3 It is an exploded view of an adjustable mouthpiece in another embodiment of the present application.

[0022] Figure 4 This is an exploded view of an adjustable mouthpiece in yet another embodiment of the present application.

[0023] Figure 5 This is an exploded view of an adjustable mouthpiece in yet another embodiment of the present application.

[0024] Figure 6 It is a schematic diagram of an adjustable mouthpiece provided with an operation window in one embodiment of the present application.

[0025] Figure 7 Schematic diagram of the structure of a flute in one embodiment of the present application.

[0026] Description of reference numerals:

[0027] 1. Adjustable mouthpiece; 110. Mouthpiece tube; 111. Through hole; 111a. First ventilation hole; 111b. Second ventilation hole; 112. Blowing hole; 113. Operation window; 120. Movable sleeve; 121. Membrane hole; 121a. First membrane pasting hole; 121b. Second membrane pasting hole; 121c. Third membrane pasting hole; 121d. Fourth membrane pasting hole; 121e. Fifth membrane pasting hole; 121f. Sixth membrane pasting hole; 130. Sealing ring; 140. First limiting member; 2. Tube body; 210. Second limiting member. Detailed implementation manners

[0028] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0029] In the description of the present application, it should be understood that if such terms as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application.

[0030] In addition, if such terms as "first" and "second" appear, these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plural" appears, the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0031] In this application, unless otherwise clearly defined and limited, if terms such as "installed", "connected", "linked", "fixed", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Referring also to Figure 1 and Figure 2 , in an embodiment of the present application, the adjustable mouthpiece 1 involved includes a mouthpiece tube 110 and a movable sleeve 120. The mouthpiece tube 110 is provided with a through hole 111 and a blowing hole 112. The through hole 111 is used for attaching a bamboo flute membrane (not shown in the figure); the movable sleeve 120 is sleeved on the mouthpiece tube 110. A membrane hole 121 is provided on the tube wall of the movable sleeve 120. The movable sleeve 120 can move relative to the mouthpiece tube 110, so that the membrane hole 121 selectively corresponds to the through hole 111 or the tube wall of the movable sleeve 120.

[0033] For the adjustable mouthpiece 1 described in the present application, by sleeving the movable sleeve 120 provided with the membrane hole 121 on the mouthpiece tube 110, when driving the movable sleeve 120 to move relative to the mouthpiece tube 110, the membrane hole 121 can be aligned or misaligned with the through hole 111. When the membrane hole 121 is aligned with the through hole 111, the sound that the flute can emit has a timbre similar to that of a bamboo flute; when the membrane hole 121 is not aligned with the through hole 111, the sound emitted by the flute has the original timbre of the flute. In this way, during the performance, the performer only needs to drive the movable sleeve 120 to move to make the flute emit two timbres, and the operation is simple; on the other hand, the membrane hole 121 is opened on the mouthpiece, and there is no need to process the flute body, reducing the risk of damage to the flute body and lowering the cost.

[0034] Specifically, referring to Figure 7 , the adjustable mouthpiece 1 is used to be sleeved with the tube body 2 of the flute, so that the air flow channels in the mouthpiece tube 110 are communicated with the air flow channels in the tube body 2.

[0035] The mouthpiece tube 110 is provided with a mouthpiece. The shape of the mouthpiece is approximately a convex platform, and the convex platform is provided with a blowing hole 112. The mouthpiece can be integrally formed with the tube body of the mouthpiece tube 110, or can be fixedly connected to the mouthpiece tube 110 by means of welding or bonding, etc. During playing, the performer blows air into the air flow channel in the mouthpiece tube 110 through the blowing hole 112 to make the flute sound.

[0036] The through hole 111 is provided on the tube wall of the mouthpiece tube 110, and the through hole 111 penetrates through the tube wall. As Figure 2As shown, the air enters the air flow channel of the flute head tube 110 through the blowing hole 112 and then flows to the air flow channel in the tube body 2. During this process, the air flow passes through the through hole 111. In this way, the through hole 111 causes the air flow to produce special vibrations, thereby making the flute sound have a special timbre similar to that of a bamboo flute.

[0037] The movable sleeve 120 is sleeved on the outer circumferential surface of the mouthpiece tube 110. It can be understood that when the tube wall of the movable sleeve 120 covers the through hole 111, the air flow cannot flow out through the through hole 111, and then resonance cannot be generated, and the flute sound does not have the special timbre similar to that of a bamboo flute.

[0038] The movable sleeve 120 can move relative to the mouthpiece tube 110, so that the membrane hole 121 opened on the movable sleeve 120 overlaps with the through hole 111, and the air flow channel in the mouthpiece tube 110 is connected to the outside. At this time, the air flow can resonate at the overlapping hole formed by the through hole 111 and the membrane hole 121, so that the flute sound has a special timbre similar to that of a bamboo flute.

[0039] In this embodiment, the movable sleeve 120 can be rotated relative to the mouthpiece tube 110, which is easy to operate.

[0040] In other embodiments, the movable sleeve 120 may also move relative to the mouthpiece tube 110 along the length direction of the mouthpiece tube 110. Specifically, the movable sleeve 120 has a certain translation range in the length direction of the mouthpiece tube 110, and by translating the movable sleeve 120, the membrane hole 121 and the through hole 111 may be selectively aligned or staggered.

[0041] The membrane hole 121 is provided on the movable sleeve 120, and the membrane hole 121 is used to attach the flute membrane (not shown). When the membrane hole 121 is covered with the flute membrane, the airflow causes the flute membrane to vibrate, so that the flute sound has a special timbre similar to that of a bamboo flute, which is significantly different from that of a traditional flute. The material of the flute membrane can be transparent glue, paper, bamboo membrane, plastic membrane, and reed membrane, etc. Traditional bamboo flutes mostly use reed membranes as flute membranes, which have better timbre.

[0042] There are many factors that affect the timbre of the through hole 111 and the flute membrane. Among them, the distance between the through hole 111 and the flute body 2 will affect the timbre of different ranges.

[0043] refer to Figure 3 and Figure 7, in some embodiments, illustratively, a first vent hole 111a and a second vent hole 111b are provided in the mouthpiece tube 110. Compared with the first vent hole 111a, the second vent hole 111b is closer to the tube body 2. The movable sleeve 120 is provided with a first film pasting hole 121a and a second film pasting hole 121b. In the length direction of the mouthpiece tube, the projection distance between the first film pasting hole 121a and the second film pasting hole 121b is equal to the projection distance between the first vent hole 111a and the second vent hole 111b. However, the connection line at the centers of the first film pasting hole 121a and the second film pasting hole 121b intersects with the connection line at the centers of the first vent hole 111a and the second vent hole 111b. It can be understood that when the movable sleeve 120 is sleeved on the mouthpiece tube 110, by rotating the movable sleeve 120, the first film pasting hole 121a can be overlapped with the first vent hole 111a, and at this time, the second film pasting hole 121b does not overlap with the second vent hole 111b. By rotating the movable sleeve 120 again, the second film pasting hole 121b can be overlapped with the second vent hole 111b, and at this time, the first film pasting hole 121a does not overlap with the first vent hole 111a.

[0044] Continue to refer to Figure 3 and Figure 7 , when the through hole 111 is closer to the mouthpiece and farther from the tube body 2, the music range covered by the pronunciation timbre is wider, but the pronunciation in the low pitch range is not sensitive; when the through hole 111 is farther from the mouthpiece and closer to the tube body 2, the coverage range of the pronunciation timbre is limited, and only the timbre in the high pitch range can be slightly changed. In this application, by providing the first film pasting hole 121a and the second film pasting hole 121b at different positions, the performer can select the through holes 111 at different positions for sound production work by rotating the movable sleeve 120. When the pitch range of the performance piece is mainly in the middle and high pitch ranges, the performer rotates the movable sleeve 120 to make the first vent hole 111a work; when the pitch range of the performance piece is mainly in the low pitch range, the performer rotates the movable sleeve 120 to make the second vent hole 111b work. In this way, a better performance effect can be obtained, and the blowing experience of the performer can be improved.

[0045] In this embodiment, the centers of the first film pasting hole 121a and the second film pasting hole 121b are located on the same straight line parallel to the axis of the mouthpiece tube 110. The advantage is that it is convenient for the performer to observe which of the first film pasting hole 121a and the second film pasting hole 121b is in the working state at the same time, and there is no need to rotate the mouthpiece tube 110. In other embodiments, the centers of the first film pasting hole 121a and the second film pasting hole 121b may not be located on the same straight line parallel to the axis of the mouthpiece tube 110.

[0046] Refer to Figure 4 , in some other embodiments, the movable sleeve 120 is provided with a third film pasting hole 121c and a fourth film pasting hole 121d.

[0047] The centers of the third film - sticking hole 121c and the fourth film - sticking hole 121d are also located on the same straight line parallel to the axis of the mouthpiece tube 110. Understandably, the distance between the third film - sticking hole 121c and the fourth film - sticking hole 121d is equal to the distance between the first ventilation hole 111a and the second ventilation hole 111b. When the movable sleeve 120 is rotated to a certain position, the third film - sticking hole 121c and the fourth film - sticking hole 121d simultaneously overlap with the first ventilation hole 111a and the second ventilation hole 111b respectively, so that both the first ventilation hole 111a and the second ventilation hole 111b are in a working state. At this time, the timbre of the sound played is highly unified in the low, medium, and high pitch ranges.

[0048] Reference Figure 5 , in some other embodiments, the movable sleeve 120 is provided with a fifth film - sticking hole 121e and a sixth film - sticking hole 121f.

[0049] The fifth film - sticking hole 121e and the sixth film - sticking hole 121f are arranged along the moving direction of the movable sleeve 120. Specifically, the center points of the fifth film - sticking hole 121e and the sixth film - sticking hole 121f are both located on the same circumferential line of the movable sleeve 120. By rotating the movable sleeve 120, the fifth film - sticking hole 121e or the sixth film - sticking hole 121f can be selectively overlapped with the through - hole 111.

[0050] Specifically, in practical applications, the fifth film - sticking hole 121e and the sixth film - sticking hole 121f can be opened as holes of different sizes. Different - sized holes will produce different timbres, and the player can choose different holes to produce sound so as to quickly switch the timbre during playing.

[0051] Specifically, in practical applications, it is also possible to stick bamboo flute membranes on both the fifth film - sticking hole 121e and the sixth film - sticking hole 121f, and one of the two film - sticking holes 121 has a tighter - stuck membrane, while the other has a looser - stuck membrane. Different tightnesses of the membranes produce different timbres. When the membrane is looser, the timbre of the flute sound is brighter and closer to the sound of a bamboo flute; when the membrane is tighter, the timbre of the flute sound is closer to the original timbre of a flute, but the loudness is higher and it is more clearly distinguishable. In this way, the performer can adjust the tightness of the membranes on different film - sticking holes 121 in advance to achieve the desired timbre and can easily switch during the performance.

[0052] Of course, more film - sticking holes 121 can be provided along the moving direction of the movable sleeve 120, and membranes with different tightnesses or different materials are stuck on the film - sticking holes 121. The performer can freely select by moving the movable sleeve 120 to produce sounds with different timbres during the performance.

[0053] The through hole 111 is circular. When applying the film, the stretching of the bamboo flute membrane is relatively uniform, the feeding for forming stretch marks on the bamboo flute membrane is appropriate, and the sound quality of the pronunciation has better permeability. In some other embodiments, the through hole 111 may also be in the shape of an ellipse, a polygon, etc.

[0054] Reference Figure 6 , in some embodiments, the head tube 110 is provided with an operation window 113. The operation window 113 is located on the tube wall of the head tube 110 and is opposite to the through hole 111. It can be understood that when the movable sleeve 120 is removed from the head tube 110, the bamboo flute membrane can be placed into the head tube 110 through the operation window 113, and the bamboo flute membrane can be attached to one side of the inner wall of the head tube 110 to cover the through hole 111. In this way, compared with the way of attaching the bamboo flute membrane to the outer surface of the movable sleeve 120 to cover the membrane hole 121, the way of attaching the bamboo flute membrane to the inner wall of the head tube 110 to cover the through hole 111 can also make the flute emit a flute sound with a similar sound quality to that of a bamboo flute. Moreover, the bamboo flute membrane is closer to the air flow channel, the resonance effect is more obvious, and the sound quality is more full. On the other hand, attaching the bamboo flute membrane to the inner wall of the head tube 110 can prevent the bamboo flute membrane from being accidentally touched by the hand or other objects, effectively improving the service life of the bamboo flute membrane.

[0055] Reference Figure 1 And Figure 2 , the adjustable flute head 1 further includes a sealing ring 130. The sealing ring 130 is sleeved on the head tube 110. It can be understood that at the sleeved position of the head tube 110, the inner diameter of the sealing ring 130 is slightly smaller than the outer diameter of the head tube 110. The end of the movable sleeve 120 abuts against the end face of the sealing ring 130, and the sealing ring 130 blocks the gap between the end of the movable sleeve 120 and the outer wall of the head tube 110, preventing air leakage.

[0056] The sealing rings 130 are respectively arranged at both ends of the movable sleeve 120, and the air leakage prevention effect is better.

[0057] Continue to refer to Figure 1 And Figure 2 , the adjustable flute head 1 further includes a first limiting member 140. The first limiting member 140 is arranged on the outer peripheral side of the head tube 110 and is located between the through hole 111 and the blowing hole 112. The first limiting member 140 is used to abut against the sealing ring 130 to prevent the sealing ring 130 and the movable sleeve 120 from continuously moving towards the direction close to the mouthpiece, so that the membrane hole 121 and the through hole 111 cannot overlap. The first limiting member 140 can be a stop block arranged on the outer peripheral side of the head tube 110 by means of welding, bonding or integrally forming with the head tube 110.

[0058] In an exemplary embodiment, the first limiting member 140 is a collar, which is in interference fit with the head tube 110. In the longitudinal direction of the head tube 110, along the direction from the blowing hole 112 towards the through hole 111, the inner diameter of the head tube 110 gradually increases. The collar is sleeved on the head tube 110 from the side with a smaller diameter, and then gradually moved towards the direction close to the through hole 111 until the collar can no longer move. At this time, the collar and the head tube 110 are in an interference fit state, and the collar cannot rotate or slide relative to the head tube 110. In this way, the first limiting member 140 has a better abutting effect on the movable sleeve 120.

[0059] Reference Figure 7 , this application also relates to a flute, which includes a tube body 2 and the adjustable head 1 described above, and the tube body 2 is detachably connected to the adjustable head 1. The tube body 2 is the body of the flute. During assembly, the end of the adjustable head 1 is inserted into one end of the tube body 2. During the insertion process, the fitting form between the head tube 110 and the tube body 2 gradually changes from a clearance fit to an interference fit. When playing, the player only needs to rotate or translate the movable sleeve 120 to play different timbres, so that the flute can emit both the sound of a traditional flute and the sound similar to that of a bamboo flute.

[0060] In some embodiments, the flute further includes a second limiting member 210. The second limiting member 210 is a collar and is sleeved on the head tube 110. When the tube body 2 and the adjustable head 1 are in the installed state, as Figure 7 shown, the tube body 2 abuts against the side of the second limiting member 210 away from the movable sleeve 120 to drive the second limiting member 210 to abut against the movable sleeve 120 in the direction close to the mouthpiece. In this way, when the adjustable head 1 is inserted into the tube body 2, the end of the tube body 2 abuts against the second limiting member 210, and the second limiting member 210 abuts the movable sleeve 120 against the sealing ring 130 in the direction close to the first limiting member 140, further enhancing the limiting effect on the movable sleeve 120 and preventing the movable sleeve 120 from sliding along the longitudinal direction of the head tube 110, resulting in the misalignment of the through hole 111 and the membrane hole 121.

[0061] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0062] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patented application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. An adjustable mouthpiece for connecting to a flute body, characterized in that: The adjustable mouthpiece comprises: The mouthpiece is provided with a through hole and a blowing hole; A movable sleeve is sleeved on the flute head tube, a membrane hole is opened on the tube wall of the movable sleeve, and the membrane hole is used to cover the flute membrane. The movable sleeve can move relative to the flute head tube so that the membrane hole overlaps with the through hole or overlaps with the tube wall of the movable sleeve; A sealing ring, which is sleeved on the mouthpiece tube and abuts against the end of the movable sleeve; The first limiting member is arranged on the outer peripheral side of the mouthpiece and is located between the through hole and the blowing hole. The first limiting member abuts against the side of the sealing ring away from the movable sleeve to limit the sealing ring from moving toward the blowing hole.

2. The adjustable mouthpiece according to claim 1, characterized in that: The flute head tube is also provided with an operation window, which is arranged on the tube wall of the flute head tube, so that the flute membrane can enter the flute head tube through the operation window and be attached to the inner wall of the flute head tube and cover the through hole.

3. The adjustable mouthpiece according to claim 1 or 2, characterized in that: The flute head is provided with a first ventilation hole and a second ventilation hole, and along the length direction of the flute head, the projected distance between the first ventilation hole and the blowing hole is smaller than the projected distance between the second ventilation hole and the blowing hole; the movable sleeve is provided with a first membrane hole and a second membrane hole, and along the length direction of the flute head, the projected distance between the first membrane hole and the second membrane hole is equal to the projected distance between the first ventilation hole and the second ventilation hole; and a line connecting the center of the first membrane hole and the center of the second membrane hole intersects with a line connecting the center of the first ventilation hole and the center of the second ventilation hole, so that when the flute head and the movable sleeve move relatively to the point where the first membrane hole overlaps with the first ventilation hole, the second membrane hole does not overlap with the second ventilation hole.

4. The adjustable mouthpiece according to claim 3, characterized in that: The movable sleeve is further provided with a third membrane hole and a fourth membrane hole. In the length direction of the mouthpiece, the projection distance between the third membrane hole and the first ventilation hole is equal to the projection distance between the fourth membrane hole and the second ventilation hole, so that when the mouthpiece and the movable sleeve move relatively to the point where the third membrane hole overlaps with the first ventilation hole, the fourth membrane hole overlaps with the second ventilation hole.

5. The adjustable mouthpiece according to claim 1 or 2, characterized in that: The movable sleeve is provided with a fifth membrane hole and a sixth membrane hole, the fifth membrane hole and the sixth membrane hole are arranged along the moving direction of the movable sleeve, and when the mouthpiece tube and the movable sleeve move relatively, the through hole selectively overlaps with the fifth membrane hole or the sixth membrane hole.

6. The adjustable mouthpiece according to claim 1, characterized in that: The first limiting member is in a ring shape, and is interference fit with the mouthpiece tube.

7. A flute, characterized in that: The invention comprises a tube body and the adjustable mouthpiece according to any one of claims 1 to 6, wherein the tube body is detachably connected to the adjustable mouthpiece.

8. The flute according to claim 7, characterized in that It also includes a second limiting member, which is in a ring shape and is sleeved on the mouthpiece tube. When the tube body and the adjustable mouthpiece are in an installed state, the tube body abuts against a side of the second limiting member that is away from the movable sleeve, so that the second limiting member stops at the movable sleeve.

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