A new harmonica structure

Abstract

The utility model discloses a novel harmonica structure relates to harmonica technical field, including the main body of the grid, the reed fixed on the main body of the grid and the bellows cover covered in the lateral main body of the grid, the main body of the grid is provided with the parallel main wind box and auxiliary wind box in the inside, the main wind box is as the main cavity of reed vibration sound production, the auxiliary wind box is as the auxiliary cavity of reinforcing resonance, and the main wind box is communicated with the auxiliary wind box through the integrated communication air channel and carries out airflow communication to constitute a composite resonance system together. The utility model discloses a novel harmonica structure, the novel design harmonica structure, under the premise of guaranteeing air tightness, has realized the efficient utilization of airflow and the remarkable promotion of tone quality, compared with the semitone harmonica in the prior art, the design of the multiple air duct also has improved the performance and stability of the tone, and the structure is simple, and the practicality is stronger.

Description

Technical Field

[0001] This utility model relates to the field of harmonica technology, and in particular to a novel harmonica structure. Background Technology

[0002] The chromatic harmonica, a common wind instrument, boasts a wide range and beautiful tone, making it widely used in solo and ensemble performances. Traditional chromatic harmonicas typically employ a single main bellows structure. Due to limitations in playing comfort, the main bellows is relatively small, resulting in insufficient space for reed vibration. This causes airflow turbulence within the narrow air passage, affecting airflow efficiency, leading to a muffled sound, difficulty in playing, and a noticeable sense of air leakage.

[0003] In existing technologies, attempts have been made to improve sound quality and playing efficiency by increasing bellows volume or altering the air duct structure to improve aerodynamic performance. However, these solutions often lead to increased overall weight and cost of the harmonica, or complex structures that hinder production and maintenance. Especially in the high and low registers, due to significant differences in reed size, a single air duct structure cannot meet the airflow requirements of different registers, limiting the uniformity and stability of tonal performance. To address these issues, we have introduced a novel harmonica structure. Utility Model Content

[0004] This utility model discloses a novel harmonica structure, aiming to solve the technical problems of harmonica playing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A novel harmonica structure includes a frame body, a reed plate fixed to the frame body, and a bellows cover covering the outside of the frame body. The frame body contains a main bellows and an auxiliary bellows arranged side-by-side. The main bellows serves as the primary cavity for reed vibration and sound generation, while the auxiliary bellows serves as an auxiliary cavity for enhancing resonance. The main and auxiliary bellows are connected by an integrally formed air duct to form a composite resonance system. The main bellows is further divided by a partition structure into independent airflow ducts for blowing and inhaling reeds. This partition structure physically isolates the airflow paths during blowing and inhaling, significantly reducing mutual interference and energy loss between the two airflows within the narrow cavity, thus allowing the airflow to act more efficiently on the corresponding reeds.

[0007] The newly designed harmonica structure achieves efficient airflow utilization and significant improvement in sound quality while ensuring airtightness. Compared with existing chromatic harmonicas, the multi-channel design also improves the tone performance and stability. The structure is simple and highly practical.

[0008] In a preferred embodiment, the physical dimensions of the secondary bellows are configured to match the reed vibration characteristics of the corresponding frequency range. The secondary bellows serving the long reeds in the low frequency range are significantly longer than the secondary bellows serving the short reeds in the high frequency range. This adaptive design optimizes the resonance effect and airflow efficiency of different frequency ranges.

[0009] For long reeds in the bass range that require a larger air volume for driving and resonance, a longer secondary bellows is provided to enhance their bass effect; for short reeds in the treble range, a smaller secondary bellows is used to avoid excessive resonance that would cause the tone to become muddy, thus achieving the goal of balanced tone and optimal resonance effect across the entire frequency range.

[0010] In a preferred embodiment, the length and width of the connecting ventilation duct vary according to the frequency range of the main and auxiliary air boxes connected to it; the connecting ventilation duct corresponding to the low frequency range has a larger length and width, while the connecting ventilation duct corresponding to the high frequency range has a correspondingly smaller size, so as to achieve optimal airflow guidance and impedance matching.

[0011] By varying the size of the airflow channels according to the pitch range, impedance matching optimization can be performed for airflow at different frequencies. Larger channels are used in the low-pitched range to reduce airflow resistance and ensure smooth airflow; smaller channels are used in the high-pitched range to maintain appropriate airflow speed and pressure, thereby ensuring that all pitch ranges receive an efficient and stable airflow supply, improving the consistency of playing response and pitch stability.

[0012] In a preferred embodiment, the bellows cover is made of lightweight plastic material, with one side being pressed and fixed to the main body of the gong frame by the installation of a spring plate, and the opposite side being provided with at least one buckle, which forms a tight fit with the corresponding slot on the main body of the gong frame, thereby realizing the quick and reliable assembly and airtight sealing of the bellows cover.

[0013] The bellows cover is made of lightweight plastic and uses a combination of buckles and slots for locking. This ensures the overall airtightness of the bellows while effectively reducing the weight of the instrument and improving the comfort of holding it. The buckle connection also simplifies the assembly process, making it easier to produce and maintain, thus achieving a balance between lightweight and reliability.

[0014] In a preferred embodiment, the top of the bellows cover is provided with equidistant grooves, which fit tightly into the top of the side wall of the bellows body to form an additional sealing structure, thereby further ensuring the airtightness of the entire bellows system and preventing air leakage.

[0015] The groove and the side wall of the bellows body form a seal, providing double airtight protection for the bellows system. This effectively prevents airflow from leaking out of the joints and further ensures that the airflow can be fully utilized to drive the reeds, improving the efficiency and clarity of the sound.

[0016] In a preferred embodiment, the cavity height of the main air box is reduced to decrease the ineffective space volume, allowing the airflow to flow more concentratedly and smoothly over the reed surface. This effectively reduces the possibility of the airflow generating eddies or turbulence within the cavity, thereby improving the efficiency of airflow drive.

[0017] Lowering the height of the main bellows reduces its internal unused space, forcing the airflow to flow closer to the reed surface, increasing the force of the airflow on the reed, and effectively suppressing the generation of eddies. This makes the airflow path more direct and the energy loss smaller, thereby significantly improving the reed's oscillation speed and sound sensitivity.

[0018] In a preferred embodiment, by introducing the auxiliary bellows and working in conjunction with the main bellows, the overall resonance volume of the harmonica is significantly increased, which not only makes the tone fuller and richer, but also reduces the airflow resistance during playing by optimizing the airflow path, making the playing experience more effortless.

[0019] The introduction of the secondary bellows greatly improves the sound quality and makes the tone fuller without increasing the external size of the harmonica. The optimized airflow path reduces the resistance to blowing and sucking, allowing the player to obtain a loud and full sound without much effort, which greatly improves the playing experience.

[0020] In a preferred embodiment, the partition structure, the side wall of the main air box, and the main body of the duct are integrally molded and manufactured by a one-time injection molding process to ensure structural strength, dimensional accuracy, and airtight isolation between the air ducts.

[0021] The one-piece molding process ensures that the main body of the instrument frame, the air duct and the partition structure have extremely high dimensional consistency and structural strength, avoids the errors and air leakage points that may exist in the assembly of multiple parts, ensures strict airtight isolation between each air duct, thus stably realizes the designed acoustic performance, and is conducive to large-scale standardized production and reduces production costs.

[0022] The novel harmonica structure provided by this utility model has the following advantages:

[0023] Firstly, the newly designed harmonica structure achieves efficient airflow utilization and a significant improvement in sound quality while ensuring airtightness. Compared with the existing chromatic harmonica, the multi-airflow design also improves the tone performance and stability. The structure is simple and highly practical.

[0024] Secondly, by varying the size of the ventilation channels according to the pitch range, impedance matching optimization can be performed for airflow at different frequencies. A larger channel is used in the low-pitched range to reduce airflow resistance and ensure smooth airflow; a smaller channel is used in the high-pitched range to maintain appropriate airflow speed and pressure. This ensures efficient and stable airflow supply across all pitch ranges, improving the consistency of playing response and pitch stability. The lightweight plastic bellows cover, combined with a snap-fit ​​and slot locking system, ensures overall bellows airtightness while effectively reducing the instrument's weight and improving holding comfort. The snap-fit ​​connection also simplifies the assembly process, facilitating production and subsequent maintenance, achieving a balance between lightweight design and reliability. The fitting of the grooves into the side walls of the grille body creates a seal, providing double airtightness for the bellows system. This effectively prevents airflow leakage from the seams, further ensuring that airflow is fully utilized to drive the reeds, enhancing the efficiency and clarity of sound production. Lowering the height of the main bellows reduces its internal unused space, forcing airflow closer to the reed surface and increasing the force of the airflow on the reed. This effectively suppresses vortex generation, resulting in a more direct airflow path and less energy loss, significantly improving the reed's responsiveness and sound production sensitivity. The introduction of the secondary bellows, without increasing the harmonica's external dimensions, greatly improves sound quality through a composite resonance system, producing a fuller tone. The optimized airflow path reduces blowing and sucking resistance, allowing players to achieve a loud, full sound effortlessly, greatly improving the playing experience. The one-piece molding process ensures extremely high dimensional consistency and structural strength for the frame, air ducts, and partition structure, avoiding potential errors and leaks that can occur with multi-part assembly. It also ensures strict airtight isolation between air ducts, thus stably achieving the designed acoustic performance and facilitating large-scale standardized production, reducing production costs. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a novel harmonica structure proposed in this utility model.

[0026] Figure 2 This is a three-dimensional bottom view of a novel harmonica structure proposed in this utility model.

[0027] Figure 3 This is a three-dimensional schematic diagram of a novel harmonica structure proposed in this utility model.

[0028] Figure 4 This is a top cross-sectional view of a novel harmonica structure proposed in this utility model.

[0029] In the attached diagram: 1. Main body of the qin frame; 2. Reed plate; 3. Bellows cover; 4. Main bellows; 5. Secondary bellows; 6. Connecting ventilation duct; 7. Air blowing reed duct; 8. Air intake reed duct; 9. Partition structure; 10. Buckle; 11. Slot; 12. Groove. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] The novel harmonica structure disclosed in this utility model is mainly applied to harmonica usage scenarios.

[0032] Reference Figure 1 - Figure 4 A novel harmonica structure includes a frame body 1, a reed plate 2 fixed to the frame body 1, and a bellows cover 3 covering the outside of the frame body 1. The frame body 1 has a main bellows 4 and an auxiliary bellows 5 arranged side by side. The main bellows 4 serves as the main cavity for reed vibration and sound generation, and the auxiliary bellows 5 serves as an auxiliary cavity for enhancing resonance. The main bellows 4 and the auxiliary bellows 5 are connected by an integrally manufactured air duct 6 to form a composite resonance system. The main bellows 4 is further divided by a partition structure 9 into an independent blowing reed air duct 7 and a drawing reed air duct 8. The partition structure 9 can physically isolate the airflow paths during blowing and drawing, significantly reducing the mutual interference and energy loss of the two airflows in the narrow cavity, thereby allowing the airflow to act more efficiently on the corresponding reeds. The physical dimensions of the secondary bellows 5 are configured to match the reed vibration characteristics of the corresponding frequency range. The secondary bellows 5 serving the long reeds in the low frequency range is significantly longer than the secondary bellows 5 serving the short reeds in the high frequency range. This adaptive design optimizes the resonance effect and airflow efficiency of different frequency ranges.

[0033] In this embodiment, the airflow first enters the corresponding blowing reed duct 7 or suction reed duct 8 within the main airbox 4. Due to the presence of the partition structure 9, the blowing and suction airflows are effectively isolated and do not interfere with each other. The airflow is concentrated on the corresponding reeds to make them vibrate and produce sound. At the same time, some airflow enters the auxiliary airbox 5 through the connecting ventilation duct 6. The auxiliary airbox 5, as a resonance chamber, together with the main airbox 4, forms a composite acoustic system, enhancing the resonance effect of the sound and making the timbre fuller. For different frequency ranges, the dimensions of the auxiliary airbox 5 and the connecting ventilation duct 6 are adaptively designed. The low-frequency range uses a larger volume auxiliary airbox 5 and a wider connecting ventilation duct 6 to optimize the low-frequency response, while the high-frequency range has a correspondingly smaller size to ensure the clarity of the sound. The newly designed harmonica structure achieves efficient utilization of airflow and a significant improvement in sound quality while ensuring airtightness. Compared with the chromatic harmonica in the prior art, the multi-duct design also improves the performance and stability of the timbre. The structure is simple and highly practical.

[0034] In the above technical solution, considering the issue of harmonica playing, the specific operation is as follows to solve this problem:

[0035] Reference Figure 1 - Figure 4 In a preferred embodiment, the length and width of the connecting ventilation duct 6 vary according to the corresponding tonic register of the main and auxiliary bellows connected to it; the connecting ventilation duct 6 corresponding to the bass register has a larger length and width, while the connecting ventilation duct 6 corresponding to the treble register has a correspondingly smaller size, in order to achieve optimal airflow guidance and impedance matching. The bellows cover 3 is made of lightweight plastic material, and one side of it is pressed and fixed to the frame body 1 by the installation of the spring plate 2. The opposite side of it is provided with at least one buckle 10, which forms a tight fit with the corresponding slot 11 provided on the frame body 1, thereby realizing the quick and reliable assembly and airtight sealing of the bellows cover 3. The top of the bellows cover 3 is provided with equidistant grooves 12, which fit tightly with the top of the side wall of the frame body 1 to form an additional sealing structure, thereby further ensuring the airtightness of the entire bellows system and preventing air leakage. The height of the main bellows 4 is reduced to minimize ineffective space volume, allowing airflow to be more concentrated and flow smoothly over the reed surface. This effectively reduces the possibility of eddies or turbulence in the airflow within the cavity, improving airflow drive efficiency. By introducing the auxiliary bellows 5 to work in conjunction with the main bellows 4, the overall resonance volume of the harmonica is significantly increased. This not only makes the tone fuller and richer but also reduces airflow resistance during playing by optimizing the airflow path, making the playing experience more effortless. The partition structure 9, the side walls of the main bellows 4, and the main frame 1 are integrally molded structures, manufactured using a one-time injection molding process to ensure structural strength, dimensional accuracy, and airtight isolation between the various air ducts.

[0036] In this embodiment, by varying the size of the ventilation channel 6 according to the pitch range, impedance matching optimization can be performed for airflow at different frequencies. A larger channel is used in the low-pitched range to reduce airflow resistance and ensure smooth airflow; a smaller channel is used in the high-pitched range to maintain appropriate airflow speed and pressure, thereby ensuring that all pitch ranges receive efficient and stable airflow supply, improving the consistency of playing response and pitch stability. The lightweight plastic bellows cover 3, combined with the locking mechanism of the snap-fit ​​10 and slot 11, effectively reduces the weight of the instrument while ensuring the overall airtightness of the bellows, improving holding comfort. The snap-fit ​​connection also simplifies the assembly process, facilitating production and subsequent maintenance, achieving a balance between lightweight design and reliability. The fitting of the groove 12 with the side wall of the frame body 1 forms a seal, providing double airtightness for the bellows system, effectively preventing airflow leakage from the seams, further ensuring that the airflow can be fully utilized to drive the reeds, enhancing the efficiency and clarity of sound production. Lowering the height of the main bellows 4 reduces its internal ineffective space, forcing airflow closer to the reed surface, increasing the force of the airflow on the reed, and effectively suppressing the generation of eddies. This results in a more direct airflow path and less energy loss, significantly improving the reed's responsiveness and sound sensitivity. The introduction of the secondary bellows 5, without increasing the external dimensions of the harmonica, greatly improves the tone quality through a composite resonance system, resulting in a fuller timbre. The optimized airflow path reduces blowing and sucking resistance, allowing the player to achieve a loud, full sound effortlessly, greatly improving the playing experience. The one-piece molding process ensures extremely high dimensional consistency and structural strength for the harmonica's frame body 1, air ducts, and partition structure 9, avoiding potential errors and leaks that may occur during multi-part assembly. It also ensures strict airtight isolation between air ducts, thus stably achieving the designed acoustic performance and facilitating large-scale standardized production, reducing production costs.

[0037] Working principle: When the performer blows or inhales, the airflow first enters the corresponding blowing reed duct 7 or inhaling reed duct 8 in the main bellows 4. Due to the presence of the partition structure 9, the blowing and inhaling airflows are effectively isolated and do not interfere with each other. The airflow is concentrated on the corresponding reeds to make them vibrate and produce sound. At the same time, some airflow enters the auxiliary bellows 5 through the connecting duct 6. The auxiliary bellows 5, as a resonance chamber, together with the main bellows 4, forms a composite acoustic system, which enhances the resonance effect of the sound and makes the timbre fuller. The dimensions of the auxiliary bellows 5 and the connecting duct 6 are adapted for different frequency ranges. The low-frequency range uses a larger volume auxiliary bellows 5 and a wider connecting duct 6 to optimize the low-frequency response, while the high-frequency range has a correspondingly smaller size to ensure the clarity of the sound. The entire system achieves efficient utilization of airflow and a significant improvement in sound quality while ensuring airtightness.

[0038] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A novel harmonica structure, comprising a frame body (1), a reed plate (2) fixed to the frame body (1), and a bellows cover (3) covering the outside of the frame body (1), characterized in that: The main body (1) of the piano frame is provided with a main air box (4) and an auxiliary air box (5) arranged in parallel. The main air box (4) serves as the main cavity for reed vibration and sound generation, and the auxiliary air box (5) serves as an auxiliary cavity for enhancing resonance. The main air box (4) and the auxiliary air box (5) are connected by an integrally made connecting air duct (6) to form a composite resonance system. The main air box (4) is further divided into an independent blowing reed air duct (7) and a suction reed air duct (8) by a partition structure (9). The partition structure (9) can physically isolate the airflow path during blowing and suction, significantly reducing the mutual interference and energy loss of the two airflows in the narrow cavity, so that the airflow acts on the corresponding reed more efficiently.

2. The novel harmonica structure according to claim 1, characterized in that: The physical dimensions of the secondary bellows (5) are configured to match the reed vibration characteristics of the corresponding pitch range. The secondary bellows (5) serving the long reed in the low pitch range is significantly longer than the secondary bellows (5) serving the short reed in the high pitch range. This adaptive design optimizes the resonance effect and airflow efficiency of different pitch ranges.

3. The novel harmonica structure according to claim 1, characterized in that: The length and width of the connecting ventilation duct (6) vary according to the corresponding frequency range of the main and auxiliary air boxes connected to it; the connecting ventilation duct (6) corresponding to the low frequency range has a larger length and width, while the connecting ventilation duct (6) corresponding to the high frequency range has a smaller size, so as to achieve the best airflow guidance and impedance matching.

4. The novel harmonica structure according to claim 1, characterized in that: The bellows cover (3) is made of lightweight plastic material. One side of it is pressed and fixed to the main body (1) of the gong grid by the installation of the spring plate (2), and the opposite side is provided with at least one buckle (10). The buckle (10) and the corresponding slot (11) provided on the main body (1) of the gong grid form a tight fit connection, thereby realizing the quick and reliable assembly and airtight sealing of the bellows cover (3).

5. The novel harmonica structure according to claim 1, characterized in that: The top of the bellows cover (3) is provided with grooves (12) at equal intervals. The grooves (12) are tightly fitted with the top of the side wall of the bellows body (1) to form an additional sealing structure, thereby further ensuring the airtightness of the entire bellows system and preventing air leakage.

6. The novel harmonica structure according to claim 1, characterized in that: The height of the main air box (4) is reduced to reduce the ineffective space volume, so that the airflow can flow more concentratedly and smoothly over the surface of the reed. This effectively reduces the possibility of the airflow generating eddies or turbulence in the cavity and improves the efficiency of airflow drive.

7. The novel harmonica structure according to claim 1, characterized in that: By introducing the auxiliary bellows (5) and working in conjunction with the main bellows (4), the overall resonance volume of the harmonica is significantly increased, which not only makes the tone fuller and richer, but also reduces the airflow resistance during playing by optimizing the airflow path, making the playing experience more effortless.

8. The novel harmonica structure according to claim 1, characterized in that: The partition structure (9), the side wall of the main air box (4) and the main body (1) of the qin grid are integrally molded structures, which are manufactured by one-time injection molding process to ensure structural strength, dimensional accuracy and airtight isolation between each air duct.

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