Sound hole key cover fitting structure and clarinet

Abstract

The utility model relates to a sound hole key cover fitting structure and a clarinet. The technical problem of sealing tightness of the existing sound hole is solved. The sound hole key cover fitting structure comprises a main body pipe which is provided with a plurality of sound holes which are communicated with the interior of the main body pipe in the radial direction and are arranged at intervals, a concave fitting groove is formed in the outer wall of the main body pipe and located on the outer side of the sound holes, and the fitting groove is provided with a conical surface and gradually concaves towards the inner wall of the fitting groove along the sound holes; and the key cover is rotatably arranged on the outer wall of the main body pipe, one end of the key cover can rotatably extend into the fitting groove, and one end of the key cover is provided with a cushion which fits the conical surface and seals the sound hole. According to the sound hole key cover attaching structure, the attaching groove is additionally arranged, so that the attaching flatness of the soft cushion and the edge of the sound hole is improved, meanwhile, the tighter attaching degree of the soft cushion is formed through the attaching conical face, the position of the sound hole is sealed through the elastic ball, and the two-layer tight sealing effect is formed.

Description

Technical Field

[0001] The utility model belongs to the field of clarinets and relates to a sound hole key cover fitting structure and a clarinet. Background Art

[0002] For example, a Chinese patent document discloses an intelligent training clarinet [202122320176.3], comprising: a mouthpiece, two sections, an upper section tube, a lower section tube and a bell. The mouthpiece, two sections, an upper section tube and a lower section tube are connected in sequence. The bell is connected to an end of the lower section tube away from the upper section tube. Circular hole-shaped mechanical buttons and elliptical strip-shaped mechanical buttons are provided on the upper section tube and the lower section tube. The inner side walls of the sound holes of the upper section tube and the lower section tube are surrounded by annular metal sheets, and a metal thimble is provided on the connecting rod of the elliptical strip-shaped mechanical button.

[0003] The defects of the above technical solution are: the axial outer wall of the sound hole is an arc surface, the fit between the key cover and the sound hole is poor, and the soft pad on the key cover is prone to elastic failure and deformation after long-term use, and the tightness of the sound hole is poor. Utility Model Content

[0004] The purpose of the utility model is to provide a sound hole key cover fitting structure and a clarinet in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The sound hole key cover fitting structure comprises:

[0007] The main body tube has a plurality of sound holes which are radially connected to the interior of the main body tube and are arranged at intervals. A concave fitting groove is provided on the outer wall of the main body tube and outside the sound holes. The fitting groove has a tapered surface and gradually becomes concave along the sound holes toward the inner wall of the fitting groove.

[0008] The key cover is rotatably arranged on the outer wall of the main body tube, one end of the key cover can be rotatably extended into the fitting groove, and one end of the key cover is provided with a soft pad which fits the conical surface and closes the sound hole.

[0009] Furthermore, an elastic ball which can be elastically inserted into the sound hole is provided inside the soft cushion.

[0010] Furthermore, one end of the sound hole close to the fitting groove is provided with a conical surface with an increased inner diameter for the elastic ball to fit.

[0011] Furthermore, the outer diameter of the cushion is smaller than the inner diameter of the fitting groove.

[0012] Furthermore, two key shaft columns are arranged at intervals on the outer wall of the main body tube, and a shaft rod is passed through the key shaft columns at one end away from the main body tube.

[0013] Furthermore, a key rod connected to the shaft rod is provided at one end of the key cover.

[0014] Furthermore, a key is provided at one end of the key rod away from the key cover.

[0015] The utility model also provides a clarinet having the sound hole key cover fitting structure as described above.

[0016] Compared with the prior art, the sound hole key cover fitting structure of the present invention first fits and closes the sound hole through a soft pad, and then continues to deform radially outward along the conical surface to fit tightly against the bottom of the fitting groove. The newly added fitting groove increases the flatness of the fitting between the soft pad and the edge of the sound hole. At the same time, the fitting conical surface is used to form a tighter fit between the soft pad, and the sound hole position is closed by an elastic ball, forming a two-level tight sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a sound hole key cover fitting structure provided by the utility model that is not tightly fitted.

[0018] Figure 2 for Figure 1 A top view schematic diagram of the sound hole key cover fitting structure.

[0019] Figure 3 for Figure 1 Schematic diagram of the tight fit of the sound hole key cover fitting structure.

[0020] In the figure, 10, main body tube; 11, sound hole; 12, fitting groove; 13, conical surface; 14, elastic ball; 15, conical surface; 20, key cover; 21, soft pad; 22, key shaft column; 23, shaft rod; 24, key rod; 25, key. DETAILED DESCRIPTION Embodiment 1

[0021] See also Figures 1 to 3 , which is a schematic diagram of a sound hole key cover fitting structure provided by the utility model. The sound hole key cover fitting structure includes: a main body tube 10, a key cover 20 rotatably arranged on the outside of the main body tube 10, and a soft pad 21 arranged on the key cover 20 and capable of pressing on the outer wall of the main body tube 10. It can be imagined that the sound hole key cover fitting structure also includes other functional components and specific structures, such as sealing rings, mounting structures, etc., which are all well-known technologies to those skilled in the art, so they will not be described in detail one by one here.

[0022] The main tube 10 is provided with a connected sound chamber inside. The main tube 10 has a plurality of sound holes 11 which are radially connected to the inside of the main tube 10 and are arranged at intervals. Different timbres are formed by the combination of different closed sound holes 11. A concave fitting groove 12 is provided on the outer wall of the main tube 10 and outside the sound hole 11. The inner diameter of the fitting groove 12 is larger than the inner diameter of the sound hole 11, and the two are arranged on the same central axis. A conical surface 13 is provided at the bottom of the fitting groove 12 and gradually concave along the sound hole 11 toward the inner wall of the fitting groove 12, that is, a structure is formed in which the center of the bottom of the fitting groove 12 is convex and the edge is concave.

[0023] The key cover 20 is rotatably arranged on the outer wall of the main body tube 10. Specifically, two radially erected key shaft columns 22 are arranged at intervals on the outer wall of the main body tube 10. A shaft 23 is arranged between the two key shaft columns 22 at one end away from the main body tube 10. A key rod 24 connected to the shaft 23 is arranged at one end of the key cover 20. The rotation of the key cover 20 can be achieved by either the shaft 23 being rotatably connected to the key shaft column 22 or the key rod 24 being rotatably connected to the shaft 23. A key 25 is arranged at one end of the key rod 24 away from the key cover 20. By turning the key 25, one end of the key cover 20 can be driven to rotate and extend into the fitting groove 12.

[0024] One end of the key cover 20 is provided with a soft pad 21 that fits the conical surface 13 and closes the sound hole 11. In this embodiment, the surface of the soft pad 21 is made of a leather pad made of elastic material. The outer surface of the leather pad has corresponding tension, and the interior is filled with memory foam, which can return to its original state after the force is removed. The soft pad 21 first fits the closed sound hole 11, and then continues to deform radially outward along the conical surface 13 to fit tightly to the bottom of the fitting groove 12. The fitting groove 12 increases the flatness of the soft pad 21 and the edge of the sound hole 11, and at the same time, the fitting conical surface 13 is used to form a tighter fit for the soft pad 21. The outer diameter of the soft pad 21 is smaller than the inner diameter of the fitting groove 12, which prevents the circumferential edge of the soft pad 21 from interfering with the inner wall of the fitting groove 12. After the key cover 20 is embedded in the fitting groove 12, the overall structure is smoother.

[0025] An elastic ball 14 that can be elastically inserted into the sound hole 11 is arranged inside the soft pad 21, and one end of the elastic ball 14 is fixed on the key cover 20. The elastic ball 14 is made of elastic material and has a higher initial hardness than the soft pad 21, that is, the soft pad 21 enters a deformation state earlier than the elastic ball 14 after being stressed. The elastic ball 14 closes the position of the sound hole 11, forming a two-level tight sealing effect.

[0026] One end of the sound hole 11 close to the fitting groove 12 is provided with a conical surface 15 with an increased inner diameter for the elastic ball 14 to fit. The conical surface 15 allows the elastic ball 14 to be better embedded in the sound hole 11, with a higher fit. The conical surface 15 also facilitates the detachment of the elastic ball 14 when the sound hole 11 is opened. Embodiment 2

[0027] The utility model also provides a clarinet having the sound hole key cover fitting structure as described above, except for the sound hole key cover fitting structure, other components are all existing technologies or commercially available parts.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A sound hole key cover fitting structure, characterized in that: The sound hole key cover fitting structure comprises: The main body tube has a plurality of sound holes which are radially connected to the interior of the main body tube and are arranged at intervals. A concave fitting groove is provided on the outer wall of the main body tube and outside the sound holes. The fitting groove has a tapered surface and gradually becomes concave along the sound holes toward the inner wall of the fitting groove. The key cover is rotatably arranged on the outer wall of the main body tube, one end of the key cover can be rotatably extended into the fitting groove, and one end of the key cover is provided with a soft pad which fits the conical surface and closes the sound hole.

2. The sound hole key cover fitting structure according to claim 1, characterized in that: An elastic ball which can be elastically inserted into the sound hole is arranged inside the soft cushion.

3. The sound hole key cover fitting structure according to claim 2, characterized in that: One end of the sound hole close to the fitting groove is provided with a conical surface with an increased inner diameter for the elastic ball to fit.

4. The sound hole key cover fitting structure according to claim 3, characterized in that: The outer diameter of the soft pad is smaller than the inner diameter of the fitting groove.

5. The sound hole key cover fitting structure according to claim 1, characterized in that: Two key shaft columns are arranged at intervals on the outer wall of the main body tube, and a shaft rod is passed through the key shaft columns at one end away from the main body tube.

6. The sound hole key cover fitting structure according to claim 5, characterized in that: One end of the key cover is provided with a key rod connected to the shaft rod.

7. The sound hole key cover fitting structure according to claim 6, characterized in that: A key is arranged at one end of the key rod away from the key cover.

8. A clarinet, characterized in that: A sound hole key cover fitting structure having the sound hole key cover fitting structure as described in any one of claims 1 to 7.

Images