In-line type half-scale mouthpiece plate
By designing grooves on the inner surface of the mouthpiece to store lubricating oil, the problems of high friction and lubricating oil leakage in the chromatic harmonica's tone-changing plate are solved, resulting in a smoother playing experience and improved sound quality.
Patent Information
- Application Number
- CN202423023729.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-09
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In existing chromatic harmonicas, the friction between the pitch-changing plate and the mouthpiece during pitch changes results in poor smoothness and the lubricant is prone to leakage, affecting the playing experience.
Vertical grooves with a central rectangle and semicircular ends are designed on the inner surface of the blow plate to store lubricating oil, reduce friction and extend the service life of the lubricating oil, while optimizing the hole shape to concentrate and amplify sound.
It improves the smoothness of the performance, reduces lubricant leakage, simplifies the control of lubricant quantity, and enhances the smoothness and sound quality of the performance.
Smart Images
Figure CN223582667U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of musical instrument harmonica, especially a straight-line semitone scale mouthpiece plate. BACKGROUND
[0002] The semitone scale harmonica is improved from the traditional harmonica, and a clever key can be used to play ascending and descending semitones on a harmonica. Because of wide sound range, delicate tone and various changes, the semitone scale harmonica is rapidly popularized in recent years and is often used in harmonica ensemble and polyphony. In performance, the tone-changing key is pushed, the tone-changing plate moves and is attached to the inner side of the mouthpiece plate, there is a certain friction force between the two, tone-changing resistance is generated, and smoothness is blocked. In order to improve the smoothness, lubricating oil is added between the tone-changing plate and the inner side of the mouthpiece plate. Because the two are flat, the lubricating oil will leak into the harmonica if the amount of lubricating oil is not appropriate. SUMMARY
[0003] In view of the problems in the prior art, the utility model provides a straight-line semitone scale mouthpiece plate, a groove is arranged on the inner side, and lubricating oil is stored in the groove, so that the tone-changing resistance in performance is reduced, and the smoothness is improved.
[0004] To achieve the above object, the utility model provides the following technical scheme:
[0005] A straight-line semitone scale mouthpiece plate, a plurality of blowing holes are arranged on the long strip type mouthpiece plate, and a groove is arranged between two blowing holes on the inner surface of the mouthpiece plate.
[0006] Further improvement scheme is that the shape of the groove is a vertical groove with a rectangular middle part and semicircular ends, and the length of the rectangular side is equal to the height of the blowing hole. In the case of ensuring the strength of the mouthpiece plate, the area of the groove is increased, and the contact area with the tone-changing plate is reduced.
[0007] Still further improvement scheme is that the depth of the groove is 0.05-0.1 mm.
[0008] Further improvement scheme is that the blowing hole is a vertical hole with a rectangular middle part and semicircular ends on the inner surface of the mouthpiece plate, and is a round hole or a square hole or a square hole with four circular arcs on the outer surface of the mouthpiece plate.
[0009] Still further improvement scheme is that the hole width of the blowing hole on the outer surface is greater than the hole width on the inner surface, and the hole height on the outer surface is less than the hole height on the inner surface, and the blowing hole is in the shape of a horn. The blowing hole has the effect of collecting and amplifying sound. Beneficial effects
[0010] If the lubricating oil is added between the two planes of the inner side of the sound board and the mouthpiece plate, it is easy to dry, and a little more will leak into the harmonica. The concave structure is designed between the two blowing holes on the inner surface of the mouthpiece plate, which makes the lubricating oil not completely between the two planes, so that the lubricating oil is stored in the concave groove, increases the use time of the lubricating oil, and is repeatedly used on the sound board during each key pushing process, ensuring smoothness. At the same time, the amount of lubricating oil does not need to be accurately controlled, reducing the operation difficulty. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 It is a schematic diagram of the inner surface structure of the mouthpiece plate.
[0012] Figure 2 It is a schematic diagram of the outer surface structure of the mouthpiece plate.
[0013] Figure 3 It is a schematic diagram of the cross section of the mouthpiece plate.
[0014] Figure 4 It is a perspective view of the harmonica with the mouthpiece plate installed. DETAILED DESCRIPTION
[0015] As shown in Figures 1 to 3 The long strip type mouthpiece plate 1 is provided with a plurality of blowing holes 11, and a concave groove 12 is arranged between the two blowing holes 11 on the inner surface of the mouthpiece plate 1. The shape of the concave groove 12 is a vertical groove with a rectangular middle and semicircular ends, and the length of the rectangle is equal to the height of the blowing hole. The depth of the concave groove 12 is 0.05-0.1mm.
[0016] The blowing hole 11 is a vertical hole with a rectangular middle and semicircular ends on the inner surface of the mouthpiece plate, and is a circular hole or a square hole or a square hole with four circular arcs on the outer surface of the mouthpiece plate. The hole width of the blowing hole 11 on the outer surface is greater than that on the inner surface; the hole height of the blowing hole on the outer surface is smaller than that on the inner surface, which is in the shape of a horn.
[0017] Figure 4 It is a harmonica with the mouthpiece plate installed, and the inner side of the mouthpiece plate 1 is in contact with the sound board 2.
[0018] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solutions falling within the scope of the present application are within the protection scope of the present application. It should be noted that for ordinary skilled persons in the art, some improvements and decorations without departing from the principles of the present application are also considered as the protection scope of the present application.
Claims
1. A linear chromatic mouthpiece, wherein a plurality of blow holes (11) are spaced apart on a long strip mouthpiece (1), characterized in that: A groove (12) is provided between the two blow holes (11) on the inner surface of the blow plate (1). The groove (12) is a vertical groove with a rectangle in the middle and semicircles at both ends. The long side of the rectangle is the same as the height of the blow hole. The groove (12) is 0.05-0.1mm deep.
2. The inline chromatic mouthpiece according to claim 1, characterized in that: The blow hole (11) is a vertical hole with a middle rectangle and two semi-circular ends on the inner surface of the blow plate, and a round hole, a square hole or a square hole with rounded corners on the outer surface of the blow plate.
3. The inline chromatic mouthpiece according to claim 1, characterized in that: The width of the outer surface of the blow hole (11) is greater than the width of the inner surface; the height of the outer surface of the blow hole is less than the height of the inner surface, and it is shaped like a trumpet.