Saxophone head

Abstract

The saxophone head comprises a tube body, a U-shaped limiting wall and a reed, a whistle bed and an air inlet groove are arranged on the upper side face of the tube body, the air inlet groove is located at the front end of the whistle bed, a connecting tube is arranged at the rear end of the tube body, the U-shaped limiting wall is arranged on the whistle bed, one end, facing the air inlet groove, of the U-shaped limiting wall is opened, and the reed is arranged on the U-shaped limiting wall. The upper surface of the U-shaped limiting wall extends towards the inner side of the U-shaped limiting wall to form a blocking edge, so that an insertion groove is formed among the whistle bed, the U-shaped limiting wall and the blocking edge, the reed comprises a whistle plate and a connecting plate, the whistle plate is connected with one end of the connecting plate, and an air inlet is formed between the reed and the front side wall of the air inlet groove. The reed and the pipe body can be connected without a complicated limiting assembly, the reed can be positioned and installed on the pipe body by inserting the connecting plate into the inserting groove from one side of the opening, the installation position of the reed is accurate, and the reed does not deviate when the reed is installed or used.

Description

TECHNICAL FIELD

[0001] The utility model relates to musical instrument accessory technical field especially, it relates to a saxophone flute head. BACKGROUND

[0002] The flute head is the most important component of the saxophone, which is directly related to the sound and tone of the saxophone. It includes a body and a whistle piece. The whistle piece is installed on the body through a connecting assembly. When the airflow flows through the whistle piece after blowing, it produces vibration. The vibrating airflow produces sound after resonating with the air column. The whistle piece of the general flute head in the prior art needs to be cleaned, replaced or polished frequently. However, the connection method between the whistle piece and the flute tube is relatively complex, the processing technology is difficult and the manufacturing cost is high. Moreover, the installation of the whistle piece is very inconvenient, especially for children, beginners and other groups. They have difficulty in installing the whistle piece to the correct position, which affects the music effect of playing and the user experience. SUMMARY

[0003] The utility model aims at providing a saxophone flute head, which aims to solve one of the technical problems in the prior art.

[0004] To achieve the above-mentioned purpose, in the first aspect, the utility model provides a saxophone flute head, which comprises:

[0005] A tube body is provided with a flute bed and an air inlet groove on the upper side. The air inlet groove is located at the front end of the flute bed. The rear end of the tube body is provided with a connecting pipe, so that the tube body can be installed on the saxophone through the connecting pipe.

[0006] A U-shaped limiting wall is arranged on the flute bed. One end of the U-shaped limiting wall facing the air inlet groove is provided with an opening. The upper surface of the U-shaped limiting wall extends inward to form a blocking edge, so as to form a plug-in slot between the flute bed, the U-shaped limiting wall and the blocking edge.

[0007] A whistle piece comprises a whistle plate and a connecting plate. The whistle plate is connected to one end of the connecting plate. The whistle plate is installed above the air inlet groove by inserting the connecting plate into the plug-in slot from the opening, and an air inlet is formed between the whistle piece and the front side wall of the air inlet groove.

[0008] Further, the bottom of the connecting plate extends outward to form a plug-in flange. The whistle piece is fixedly installed on the tube body by inserting the plug-in flange into the plug-in slot from the opening.

[0009] Further, the side surface of the pipe body away from the whistle bed is provided with a blow nozzle inclined surface, and the blow nozzle inclined surface extends from the middle of the side surface of the pipe body away from the whistle bed to the front end of the pipe body.

[0010] Further, the pipe body is coaxially communicated with the connecting pipe.

[0011] Further, the bottom surface of the whistle bed and the connecting plate are both provided with a plane, and a limiting step is arranged between the whistle plate and the connecting plate to position the connecting plate by abutting the end surface of the opening through the limiting step when the connecting plate is inserted into the insertion slot.

[0012] Further, the thickness of the top surface of the insertion flange from the bottom surface of the connecting plate is lower than the thickness of the connecting plate to form an abutting step on the side peripheral surface of the connecting plate, and the abutting step abuts against the inner peripheral surface of the blocking edge when the whistle piece is installed on the pipe body.

[0013] Further, the top surface of the connecting plate and the top surface of the blocking edge are both provided with an arc extension to smoothly transition the top surface of the connecting plate and the top surface of the blocking edge.

[0014] Further, the thickness of the whistle plate of the whistle piece gradually thins from the rear end to the front end.

[0015] Further, the opposite two side walls of the air inlet groove are both curved and extended away from the whistle piece, and the gap between the side wall of the air inlet groove and the whistle piece gradually increases from the rear end to the front end to form the air inlet through the gap between the side wall of the air inlet groove and the whistle piece, and the air inlet is communicated with the internal space of the air inlet groove and the pipe body.

[0016] According to the first aspect, in a possible implementation manner of the saxophone head, the saxophone head comprises:

[0017] a pipe body, an upper side surface of the pipe body is provided with a whistle bed to form an insertion slot in the whistle bed, an outer edge of the whistle bed outwardly protrudes and extends to form a U-shaped limiting wall, an upper surface of the U-shaped limiting wall inwardly protrudes and extends to form a blocking edge, an air inlet groove is formed in the upper side surface of the pipe body, the air inlet groove is located at the front end of the whistle bed, and a connecting pipe is arranged at the rear end of the pipe body to enable the pipe body to be installed on a saxophone through the connecting pipe;

[0018] a whistle piece, at least two side edges of the whistle piece are provided with an arc-shaped insertion flange to enable the whistle piece to be fixedly installed on the pipe body by inserting the insertion flange from an opening into the insertion slot, and a front end of the whistle piece covers the air inlet groove and forms an air inlet between the whistle piece and the front side wall of the air inlet groove.

[0019] As can be seen from the above technical solution, the saxophone mouthpiece of this utility model has a connecting pipe at one end of the tube body, through which the tube body is installed onto the saxophone. The tube body is provided with a reed bed, which provides an installation surface for the reed. A U-shaped limiting wall is provided on the reed bed, and a stop edge is provided on the U-shaped limiting wall to fix and limit the reed on the reed bed. Specifically, the reed bed, the U-shaped limiting wall, and the stop edge form an insertion groove. The connecting plate is inserted into the insertion groove to achieve the effect of installing the reed onto the tube body. When the reed is installed on the tube body, it will be accurately positioned and installed. The reed will not slip accidentally during use. This design makes the structure simple, stable, and reliable, with low processing difficulty and manufacturing cost. The installation process is simple and quick, and it is convenient to use, resulting in a better user experience.

[0020] To make the technical concept, other objectives, advantages, features and functions of this utility model clearer and easier to understand, preferred embodiments will be specifically described in the following detailed description, and will be illustrated in conjunction with the accompanying drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a perspective view of a saxophone mouthpiece provided in an embodiment of this application;

[0023] Figure 2 This is an exploded view of the structure of a saxophone mouthpiece provided in an embodiment of this application;

[0024] Figure 3 This is an exploded view of the structure of a saxophone mouthpiece provided in an embodiment of this application from another perspective;

[0025] Figure 4 This application provides a cross-sectional view of a saxophone mouthpiece in an exploded state according to an embodiment of the present application;

[0026] Figure 5 This application provides a cross-sectional view of a saxophone mouthpiece according to an embodiment;

[0027] The above figures include the following reference numerals:

[0028] 100. Tube body; 110. Whistle bed; 120. Air inlet slot; 130. Connecting pipe; 140. Mouthpiece bevel; 150. Air inlet;

[0029] 200, U-shaped limiting wall; 210, opening; 220, resisting edge; 230, insertion slot;

[0030] 300, whistle piece; 310, whistle plate; 320, connecting plate; 321, insertion flange; 322, abutting step. DETAILED DESCRIPTION

[0031] In order for those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Please refer to Figures 1 to 5 The present embodiment provides a saxophone head, and the scheme gist of the first aspect includes: a tube body 100, a U-shaped limiting wall 200 and a whistle piece 300. The upper side of the tube body 100 is provided with a whistle bed 110 and an air inlet slot 120. The air inlet slot 120 is located at the front end of the whistle bed 110. The rear end of the tube body 100 is provided with a connecting tube 130, so that the tube body 100 can be installed on the saxophone through the connecting tube 130. The U-shaped limiting wall 200 is arranged on the whistle bed 110. The end of the U-shaped limiting wall 200 facing the air inlet slot 120 is provided with an opening 210. The upper surface of the U-shaped limiting wall 200 extends inward to form a resisting edge 220, so as to form an insertion slot 230 between the whistle bed 110, the U-shaped limiting wall 200 and the resisting edge 220. The whistle piece 300 includes a whistle plate 310 and a connecting plate 320. The whistle plate 310 is connected to one end of the connecting plate 320. The whistle plate 310 is installed above the air inlet slot 120 by inserting the connecting plate 320 into the insertion slot 230 from the opening 210, and an air inlet 150 is formed between the whistle piece 300 and the front side wall of the air inlet slot 120.

[0033] Wherein, the connecting pipe 130 is arranged at one end of the pipe body 100, the pipe body 100 is installed on the saxophone through the connecting pipe 130, the pipe body 100 is provided with a flute bed 110, the flute bed 110 provides a mounting plane for the flapper 300, the U-shaped limiting wall 200 is arranged on the flute bed 110, and the resisting edge 220 is arranged on the U-shaped limiting wall 200, so that the flapper 300 is fixed and limited on the flute bed 110 through the U-shaped limiting wall 200 and the resisting edge 220, specifically, the flapper 300 is installed on the pipe body 100 by surrounding the flute bed 110, the U-shaped limiting wall 200 and the resisting edge 220 to form the insertion slot 230, and inserting the connecting plate 320 into the insertion slot 230, so that the flapper 300 is installed on the pipe body 100, and the flapper 300 is accurately positioned and installed, and the flapper 300 will not slide accidentally in use, so that the structure is simple, stable and reliable, the processing difficulty and manufacturing cost are low, the installation process is simple and fast, the use is convenient, and the user experience is better.

[0034] Preferably, please refer to Figures 1 to 5 , the bottom of the connecting plate 320 is outwardly protruding and extending and is provided with an insertion flange 321, so that the flapper 300 is fixedly installed on the pipe body 100 by inserting the insertion flange 321 into the insertion slot 230 from the opening 210.

[0035] Wherein, the flapper 300 is installed stably on the pipe body 100 by inserting the insertion flange 321 into the insertion slot 230, the insertion flange 321 is integrally formed with the connecting plate 320, and the insertion flange 321 is matched with the insertion slot 230, so that there is no gap when the insertion flange 321 is inserted into the insertion slot 230.

[0036] Preferably, please refer to Figures 3 to 5 , the side surface of the pipe body 100 away from the flute bed 110 is provided with a mouthpiece inclined surface 140, and the mouthpiece inclined surface 140 extends from the middle of the side surface of the pipe body 100 away from the flute bed 110 to the front end of the pipe body 100.

[0037] Wherein, the mouthpiece inclined surface 140 is integrally formed by processing plasticity, and the processing method can also be mechanical polishing, cutting and the like, and the design of the mouthpiece inclined surface 140 can enable the player's lips to be attached at a more appropriate angle when the player's lips contact the mouthpiece inclined surface 140 when playing the saxophone, thereby reducing the fatigue of the lips, and the lips can be more naturally and comfortably attached to the flute head.

[0038] In the embodiment, as shown in Figure 4 , the pipe body 100 and the connecting pipe 130 are coaxially and communicatively arranged.

[0039] When the pipe body 100 is mounted to the saxophone body through the connecting pipe 130, the coaxial arrangement of the pipe body 100 and the connecting pipe 130 can ensure that the connection of the mouthpiece and the instrument is more closely and stably. When playing the saxophone, the airflow needs to pass through the inner cavity of the pipe body 100 from the player's mouth, and then enter the main body part of the saxophone through the connecting pipe 130. The coaxial arrangement of the pipe body 100 and the connecting pipe 130 can ensure that the airflow maintains a smooth path when passing through the pipe body 100 and entering the connecting pipe 130.

[0040] Preferably, as shown in the drawings, the whistle bed 110 and the bottom surface of the connecting plate 320 are both arranged in a plane, and a limiting step is arranged between the whistle plate 310 and the connecting plate 320 to position the connecting plate 320 by abutting against the end surface of the opening 210 through the limiting step when the connecting plate 320 is inserted into the insertion slot 230. Figures 2 to 5

[0041] Preferably, as shown in the drawings, the whistle bed 110 and the bottom surface of the connecting plate 320 are both arranged in a plane, which provides a stable fitting basis plane for the installation of the whistle piece 300. The contact between the plane and the plane can make the whistle piece 300 better fit with the whistle bed 110, and it is not easy to produce gaps. The whistle piece 300 is not easy to shake or shift after installation. A limiting step is arranged between the whistle plate 310 and the connecting plate 320 to position the connecting plate 320 by abutting against the end surface of the opening 210 through the limiting step when the connecting plate 320 is inserted into the insertion slot 230. Such an arrangement further enhances the tightness of the connection between the whistle piece 300 and the pipe body 100.

[0042] Further, please refer to Figures 2 to 5 , the thickness of the top surface of the insertion flange 321 from the bottom surface of the connecting plate 320 is lower than the thickness of the connecting plate 320, so as to form an abutting step 322 on the side peripheral surface of the connecting plate 320. When the whistle piece 300 is installed on the pipe body 100, the abutting step 322 abuts against the inner peripheral surface of the blocking edge 220. Such a structural design can make the installation of the whistle piece 300 on the pipe body 100 more stable, avoid the shift or shaking of the whistle piece 300 due to airflow impact or other external factors during playing, and thus ensure the stability and pitch of playing. Moreover, it can reduce the friction and collision between the whistle piece 300 and the pipe body 100, reduce the risk of wear caused by loose parts, and thus prolong the service life of the whistle piece 300 and the pipe body 100, saving the maintenance and replacement costs of the instrument.

[0043] Further, please refer to Figures 1 to 3 , the top surface of the connecting plate 320 and the top surface of the blocking edge 220 are both arranged in an arc shape, so as to smoothly transition the top surface of the connecting plate 320 and the top surface of the blocking edge 220.

[0044] ​The top surface of the connecting plate 320 and the top surface of the resisting edge 220 are smoothly connected, so that the player can feel more comfortable when playing, and the smooth transition makes the outer surface of the pipe body 100 smooth, which makes the product more beautiful.

[0045] Further, the thickness of the whistle plate 310 of the whistle piece 300 gradually thins from the rear end to the front end, the end of the whistle piece 300 is installed on the pipe body 100, the front end of the whistle piece 300 is suspended, so that the front end of the whistle piece 300 can vibrate when the user blows into the pipe body 100, and the whistle piece 300 thus arranged is more sensitive to air flow.

[0046] Further, please refer to Figures 2 to 5 The opposite two side walls of the air inlet groove 120 are curved and extended away from the whistle piece 300, and the gap between the side wall of the air inlet groove 120 and the whistle piece 300 gradually increases from the rear end to the front end, so that the air inlet 150 is formed between the side wall of the air inlet groove 120 and the whistle piece 300, and the air inlet 150 is in communication with the air inlet groove 120 and the internal space of the pipe body 100.

[0047] When the user blows into the pipe body 100, the air enters from the air inlet 150, passes through the air inlet groove 120, and then enters the internal space of the pipe body 100, and the air inlet 150 can make the air flow produce a suitable vibration frequency when passing through the gap between the whistle piece 300 and the pipe body 100.

[0048] According to the first aspect, as Figures 1 to 5 shown in a possible implementation, the saxophone head includes: a pipe body 100 and a whistle piece 300, the upper side of the pipe body 100 is provided with a whistle bed 110, the outer edge of the whistle bed 110 is outwardly protruding and extending to form a U-shaped limiting wall 200, the upper surface of the U-shaped limiting wall 200 is inwardly protruding and extending to form a resisting edge 220, the upper side of the pipe body 100 is provided with an air inlet groove 120, the air inlet groove 120 is located at the front end of the whistle bed 110, the rear end of the pipe body 100 is provided with a connecting pipe 130, so that the pipe body 100 can be installed on the saxophone through the connecting pipe 130, at least two side edges of the whistle piece 300 are provided with arc-shaped plug-in flanges 321, so that the whistle piece 300 is fixedly installed on the pipe body 100 by inserting the plug-in flanges 321 into the plug-in groove 230 from the opening 210, and the front end of the whistle piece 300 is covered on the air inlet groove 120, and the air inlet 150 is formed between the whistle piece 300 and the front side wall of the air inlet groove 120.

[0049] By setting the connecting pipe 130 at one end of the pipe body 100, the pipe body 100 is installed on the saxophone through the connecting pipe 130, the pipe body 100 is provided with the whistle bed 110, the whistle bed 110 provides the installation plane for the whistle piece 300, the U-shaped limiting wall 200, the resisting edge 220 and the pipe body 100 are integrally formed, so as to form the insertion slot 230 through the whistle bed 110, the U-shaped limiting wall 200 and the resisting edge 220, at least two side edges of the whistle piece 300 are provided with the arc-shaped insertion flange 321, the arc-shaped insertion flange 321 is inserted into the insertion slot 230 from one side of the opening 210 of the U-shaped limiting wall 200, that is, the whistle piece 300 can be installed on the pipe body 100, the insertion connection mode is simple, the whistle piece 300 can be installed at the correct position, the design is simple in structure and stable and reliable, the processing technology difficulty and the manufacturing cost are low, and the installation process is simple and fast.

[0050] From the above description, it can be seen that the above-mentioned embodiments of the utility model realize the following technical effects:

[0051] By setting the connecting pipe 130 at one end of the pipe body 100, the pipe body 100 is installed on the saxophone through the connecting pipe 130, the pipe body 100 is provided with the whistle bed 110, the whistle bed 110 provides the installation plane for the whistle piece 300, the U-shaped limiting wall 200, the resisting edge 220 and the pipe body 100 are integrally formed, so as to form the insertion slot 230 through the whistle bed 110, the U-shaped limiting wall 200 and the resisting edge 220, at least two side edges of the whistle piece 300 are provided with the arc-shaped insertion flange 321, the arc-shaped insertion flange 321 is inserted into the insertion slot 230 from one side of the opening 210 of the U-shaped limiting wall 200, that is, the whistle piece 300 can be installed on the pipe body 100, the insertion connection mode is simple, the whistle piece 300 can be installed at the correct position, the design is simple in structure and stable and reliable, the processing technology difficulty and the manufacturing cost are low, and the installation process is simple and fast.

[0052] The foregoing is a summary of the preferred embodiments of the application, and it will be apparent that modifications and improvements can be made to the embodiments without departing from the scope of the application. In some cases, variations on described embodiments could also be used, and in other cases, materials and methods similar or equivalent to those described could be used. Therefore, the above description should not be construed as limiting, but merely as exemplification of the preferred embodiments. Those skilled in the art will readily appreciate that other articles and methods, similar or equivalent to those described herein, could be employed with no more than routine experimentation required. Therefore, the application is defined by the scope of the claims rather than the foregoing description. All publications mentioned herein are incorporated by reference in their entirety for the purpose of describing and disclosing the procedures, compositions, and methodologies which are described in the publications and which might be used in connection with the application. The disclosure of all publications identified herein are incorporated herein by reference in their entirety for the purpose of describing and disclosing the procedures, compositions, and methodologies which are described in the publications and which might be used in connection with the application. The preceding specific embodiments are illustrative of the practice of the application. This application can be practiced with modification and alteration by one skilled in the art without departing from the scope of the application. Accordingly, the description is to be regarded as illustrative instead of restrictive on the scope of the application.

[0053] The above is the preferred embodiment of the present application, it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, can make a number of improvements and refinements, these improvements and refinements are also considered as the protection scope of the present application.

Claims

1. A saxophone mouthpiece, characterized in that, The utility model provides a saxophone mouthpiece, which comprises: a pipe body (100), the upper side of the pipe body (100) is provided with a mouthpiece bed (110) and an air inlet groove (120), the air inlet groove (120) is located at the front end of the mouthpiece bed (110), and the rear end of the pipe body (100) is provided with a connecting pipe (130) so that the pipe body (100) can be installed on a saxophone through the connecting pipe (130); a U-shaped limiting wall (200) is arranged on the mouthpiece bed (110), one end of the U-shaped limiting wall (200) towards the air inlet groove (120) is provided with an opening (210), and the upper surface of the U-shaped limiting wall (200) extends to the inner side to form a resisting edge (220), so that an insertion groove (230) is formed between the mouthpiece bed (110), the U-shaped limiting wall (200) and the resisting edge (220); a mouthpiece (300) comprises a mouthpiece plate (310) and a connecting plate (320), the mouthpiece plate (310) is connected with one end of the connecting plate (320), the mouthpiece plate (310) is installed above the air inlet groove (120) by being inserted into the insertion groove (230) from the opening (210) through the connecting plate (320), and an air inlet (150) is formed between the mouthpiece (300) and the front side wall of the air inlet groove (120).

2. The saxophone mouthpiece of claim 1, wherein The bottom of the connecting plate (320) is provided with an insertion flange (321) which extends and protrudes to the outer side, so that the mouthpiece (300) is fixedly installed on the pipe body (100) by inserting the insertion flange (321) into the insertion groove (230) from the opening (210).

3. The saxophone mouthpiece of claim 1, wherein The side surface of the pipe body (100) away from the mouthpiece bed (110) is provided with a mouthpiece bevel (140), and the mouthpiece bevel (140) extends from the middle of the side surface of the pipe body (100) away from the mouthpiece bed (110) to the front end of the pipe body (100).

4. The saxophone mouthpiece of claim 1, wherein The pipe body (100) is coaxially communicated with the connecting pipe (130).

5. Saxophone mouthpiece according to any one of claims 1 to 4, characterized in that The bottom surface of the mouthpiece bed (110) and the bottom surface of the connecting plate (320) are both provided in a plane, a limiting step is arranged between the mouthpiece plate (310) and the connecting plate (320), and the connecting plate (320) is positioned by abutting against the end surface of the opening (210) through the limiting step when the connecting plate (320) is inserted into the insertion groove (230).

6. The saxophone mouthpiece of claim 2, wherein The thickness of the top surface of the insertion flange (321) from the bottom surface of the connecting plate (320) is lower than the thickness of the connecting plate (320), so that an abutting step (322) is formed on the side peripheral surface of the connecting plate (320), and the abutting step (322) abuts against the inner peripheral surface of the resisting edge (220) when the mouthpiece (300) is installed on the pipe body (100).

7. The saxophone mouthpiece of claim 6, wherein The top surface of the connecting plate (320) and the top surface of the resisting edge (220) are both provided in an arc shape, so that the top surface of the connecting plate (320) and the top surface of the resisting edge (220) are smoothly connected.

8. The saxophone mouthpiece of any one of claims 1 to 4, wherein, The thickness of the whistle plate (310) of the whistle sheet (300) gradually decreases from the rear end to the front end.

9. The saxophone mouthpiece of any one of claims 1 to 4, wherein, The opposite side walls of the air inlet groove (120) are arranged to extend in a direction away from the whistle sheet (300), and the gap between the side walls of the air inlet groove (120) and the whistle sheet (300) gradually increases from the rear end to the front end, so as to form the air inlet (150) through the gap between the side walls of the air inlet groove (120) and the whistle sheet (300), which communicates with the air inlet groove (120) and the internal space of the pipe body (100).

10. A saxophone mouthpiece characterized by, Comprise: The upper side of the pipe body (100) is provided with a whistle bed (110) to form a plug-in groove (230) in the whistle bed (110), the outer edge of the whistle bed (110) is outwardly protruding to form a U-shaped limiting wall (200), the upper surface of the U-shaped limiting wall (200) is inwardly protruding to form a resisting edge (220), the upper side of the pipe body (100) is provided with an air inlet groove (120), the air inlet groove (120) is located at the front end of the whistle bed (110), and the rear end of the pipe body (100) is provided with a connecting pipe (130) to install the pipe body (100) on the saxophone through the connecting pipe (130); The at least two side edges of the whistle sheet (300) are provided with arc-shaped plug-in flanges (321) to fix and install the whistle sheet (300) on the pipe body (100) by inserting the plug-in flanges (321) into the plug-in groove (230) from the opening (210), and the front end of the whistle sheet (300) is covered on the air inlet groove (120), and the air inlet (150) is formed between the whistle sheet (300) and the front side wall of the air inlet groove (120).

Images