Electric tuning rotating shaft sleeve for contrabass

Abstract

The utility model relates to an electric tuning rotating shaft sleeve for a contrabass, which can effectively solve the problems that the number of tuning rotation cycles of an existing worm and gear structure is greatly increased and the tuning efficiency is reduced, and adopts the technical scheme that a half shaft coaxial with the center of a cylindrical shell is arranged at the bottom of the cylindrical shell; a cavity matched with a tuning knob of the contrabass is arranged in the cylindrical shell, the cross section of the lower half part of the cavity is a long and narrow rectangle, the cross section of the upper half part of the cavity is a coaxial round hole expanded at the center of the long and narrow rectangle, the diameter of the round hole is larger than that of the short edge of the long and narrow rectangle, and the round hole is matched with a shaft of the tuning knob of the contrabass; according to the utility model, the tuning of the contrabass is time-saving and labor-saving, the tuning efficiency is greatly improved, the elastic buffer layer is laid in the cavity, the rigid contact between the tuning button of the contrabass and the electric tuning rotating shaft sleeve is avoided, the tuning process is stable and smooth, the tuning effect is optimized, and the electric tuning rotating shaft sleeve for the contrabass is an innovation of the electric tuning rotating shaft sleeve for the contrabass.

Description

Technical Field

[0001] The utility model relates to the technical field of musical instruments, in particular to an electric tuning rotating shaft sleeve for double bass. Background Art

[0002] The double bass is the largest and lowest-sounding bowed string instrument in the violin family, also known as the contrabass. It has many differences from other members of the violin family. The most prominent one is its tuning mechanism. It is the only violin that uses a worm and worm gear structure for tuning. Due to the large size of the double bass, the strings are long and the tension is high, so it is relatively easy to use the worm and worm gear structure for tuning. However, the number of rotations increases significantly, resulting in a decrease in tuning efficiency. In plucked string instruments, the guitar also uses a worm and worm gear structure for tuning. The utility model patent "Electric Guitar Tuner" of the inventor Dong Minghong proposed a technical solution for tuning with electric tools. Currently, there are commercially available electric tuning rotating shaft sleeves similar to the aforementioned utility model for guitars, but the double bass is essentially different from the guitar, and this kind of electric tuning rotating shaft sleeve cannot be used for the double bass. Therefore, it is imperative to invent an electric tuning rotating shaft sleeve for double bass. Summary of the Invention

[0003] In view of the above situation, to solve the defects of the prior art, the purpose of the utility model is to provide an electric tuning rotating shaft sleeve for double bass, which can effectively solve the problem that the number of rotations of the existing worm and worm gear structure for tuning increases significantly and the tuning efficiency decreases.

[0004] The technical solution solved by the utility model is as follows: it includes a half shaft, a cylindrical shell, an elastic buffer layer, and a cavity. The bottom of the cylindrical shell is equipped with a half shaft coaxial with its center. A cavity matching the tuning knob of the double bass is arranged inside the cylindrical shell. The cross-section of the lower half of the cavity is a long and narrow rectangle, and the cross-section of the upper half is a circular hole coaxially opened in the center of the long and narrow rectangle. The diameter of the circular hole is larger than the short side of the long and narrow rectangle and matches the shaft of the double bass tuning knob. The central longitudinal section along the long side direction of the long and narrow rectangle is a trapezoid with a wider upper part and a narrower lower part. An elastic buffer layer is arranged along the circumferential direction of the inner wall of the cavity.

[0005] The structure of the utility model is novel and reasonable, and it is adapted to a variety of small electric tools, which can make the tuning of the double bass time-saving and labor-saving, greatly improving the tuning efficiency. Laying an elastic buffer layer in the cavity avoids the rigid contact between the tuning knob of the double bass and the electric tuning rotating shaft sleeve, making the tuning process stable and smooth, optimizing the tuning effect, simple in operation and convenient in use, which is an innovation on the electric tuning rotating shaft sleeve for double bass. Brief Description of the Drawings

[0006] Figure 1 It is a three-dimensional structure schematic diagram of the utility model.

[0007] Figure 2 This is the front structural view of the present utility model.

[0008] Figure 3 This is the top structural view of the present utility model.

[0009] Figure 4 This is the present utility model Figure 3 schematic view of the A-A cross-section.

[0010] Figure 5 This is the present utility model Figure 3 schematic view of the B-B cross-section. Specific embodiments

[0011] The following further describes in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0012] As shown by Figures 1-5 , the present utility model includes a half shaft 1, a cylindrical shell 2, an elastic buffer layer 3, and a cavity 4. The half shaft 1 coaxial with the center is installed at the bottom of the cylindrical shell 2. A cavity 4 matching the tuning knob of the double bass is provided inside the cylindrical shell 2. The cross-section of the lower half of the cavity 4 is a long and narrow rectangle, and the cross-section of the upper half is a coaxial round hole opened in the center of the long and narrow rectangle. The diameter of the round hole is greater than the short side of the long and narrow rectangle and matches the shaft of the double bass tuning knob. The central longitudinal section along the long side direction of the long and narrow rectangle is a trapezoid with a wider upper part and a narrower lower part. An elastic buffer layer 3 is provided along the circumferential direction of the inner wall of the cavity 4.

[0013] To ensure the use effect, both the half shaft 1 and the cylindrical shell 2 are made of rigid materials. The half shaft 1 is cylindrical and its diameter is smaller than that of the cylindrical shell 2.

[0014] Both the half shaft 1 and the cylindrical shell 2 are made of metals such as stainless steel, copper, aluminum alloy or titanium alloy, or high molecular materials such as nylon can also be used.

[0015] The thickness of the elastic buffer layer 3 is 1-3 mm, further preferably 2 mm, and it is made of synthetic rubber, or natural rubber or other rubber and plastic materials can also be used.

[0016] The diameter of the half shaft 1 is 9 mm, the diameter of the cylindrical shell 2 is 50-55 mm, and the height is 26-32 mm, further preferably 52 mm and the height is 28 mm.

[0017] The long and narrow rectangle has a long side length greater than or equal to 6-8 times the short side length.

[0018] The usage situation of the present utility model is as follows: The half shaft is coaxial with the cylindrical shell. The diameter of the half shaft is adapted to a small electric drill or an electric screwdriver. A cavity that cooperates with the tuning knob of a double bass is provided inside the cylindrical shell. The cross-section of the lower half of the cavity is a long and narrow rectangle, and the cross-section of the upper half of the cavity is a coaxial circular hole opened in the center of the long and narrow rectangle. The diameter of the circular hole is larger than the short side of the long and narrow rectangle and cooperates with the shaft of the tuning knob of the double bass. The central longitudinal section along the long side direction of the long and narrow rectangle is a trapezoid with a wider upper part and a narrower lower part. An elastic buffer layer is laid on the side peripheral surface of the cavity. The size of the space of the cavity matches the size of the tuning knob of the double bass. The half shaft and the cylindrical shell are made of metal or polymer materials. The elastic buffer layer is composed of an elastic and wear-resistant polymer material. The diameter of the half shaft is less than 10 mm, the diameter of the cylindrical shell is 50 - 55 mm, the height is 26 - 32 mm, and the thickness of the elastic buffer layer of the cavity is 1 - 3 mm. When in use, first install the half shaft of the electric tuning rotating shaft sleeve of the present utility model on a small electric drill or an electric screwdriver, then align the opening of the cavity with the tuning knob of the double bass and coaxially insert it, and turn on the power to rotate the tuning rotating shaft sleeve to tune the strings.

[0019] The design of the present utility model is reasonable and convenient to use. It is adapted to a variety of small electric tools, making the string tuning of the double bass time-saving, labor-saving and efficient. The spatial shape of the provided cavity coincides with the tuning knob of the double bass. And because the cavity adopts a design with a larger opening and a smaller bottom, the tuning knob of the double bass can be in a clamped state in the cavity to maintain coaxial operation and avoid vibration. An elastic buffer layer is laid in the cavity, avoiding the rigid contact between the tuning knob of the double bass and the electric tuning rotating shaft sleeve, making the tuning process stable and smooth, and optimizing the tuning effect. It is an innovation on the electric tuning rotating shaft sleeve of the double bass and has good economic and social benefits.

[0020] It should be pointed out that the above is only a preferred embodiment of the present utility model, and it does not impose any form of limitation on the present utility model. Any person skilled in the relevant art, without departing from the scope of the technical solution of the present utility model, can make changes or modifications to equivalent embodiments with equivalent changes by using the technical content disclosed above, and all fall within the protection scope of the present utility model.

Claims

1. An electric tuning rotating shaft sleeve for double bass, characterized in that, It includes a half shaft (1), a cylindrical shell (2), an elastic buffer layer (3), and a cavity (4). The half shaft (1) is installed at the bottom of the cylindrical shell (2) coaxially with its center. A cavity (4) matching the tuning knob of the double bass is provided inside the cylindrical shell (2). The cross-section of the lower half of the cavity (4) is a long and narrow rectangle, and the cross-section of the upper half is a coaxial round hole opened in the center of the long and narrow rectangle. The diameter of the round hole is larger than the short side of the long and narrow rectangle and matches the axis of the tuning knob of the double bass. The central longitudinal section along the long side direction of the long and narrow rectangle is a trapezoid with a wider upper part and a narrower lower part. An elastic buffer layer (3) is provided circumferentially along the inner wall of the cavity (4).

2. The electric tuning spindle sleeve for double bass according to claim 1, characterized in that, Both the half shaft (1) and the cylindrical shell (2) are made of rigid materials. The half shaft (1) is cylindrical and its diameter is smaller than that of the cylindrical shell (2).

3. The electric tuning rotating shaft sleeve for double bass according to claim 1, characterized in that, Both the half shaft (1) and the cylindrical shell (2) are made of stainless steel, copper, aluminum alloy or titanium alloy.

4. The electric tuning rotating shaft sleeve for double bass according to claim 1, characterized in that, Both the half shaft (1) and the cylindrical shell (2) are made of polymer materials.

5. The electric tuning rotating shaft sleeve for double bass according to claim 1, wherein, The thickness of the elastic buffer layer (3) is 1 - 3 mm and it is made of synthetic rubber.

6. The electric tuning spindle sleeve for double bass according to claim 5, characterized in that, The thickness of the elastic buffer layer (3) is 2 mm.

7. The electric tuning rotating shaft sleeve for double bass according to claim 1, characterized in that The diameter of the half shaft (1) is 9 mm, the diameter of the cylindrical shell (2) is 50 - 55 mm, and the height is 26 - 32 mm.

8. The electric tuning rotating shaft sleeve for double bass according to claim 7, characterized in that, The diameter of the cylindrical shell (2) is 52 mm and the height is 28 mm.

9. The electric tuning rotating shaft sleeve for double bass according to claim 1, wherein, The long and narrow rectangle has a long side length greater than or equal to 6 - 8 times the short side length.

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