Three-section musical instrument ruler 8

Abstract

The utility model discloses a three-section musical instrument ruler 8, which comprises a ruler 8 structure, and the ruler 8 structure comprises an upper tube body, a middle tube body and a lower tube body. The top surface of the upper pipe body is provided with a mouthpiece, and the joint of the upper pipe body, the middle pipe body and the lower pipe body is provided with a 45-degree slope notch. Through a three-section type inclined plane connecting structure, a little finger optimized hole site design and a low-cost manufacturing process, the problems that materials of a traditional bamboo ruler 8 are difficult to obtain, the process is complex and holding defects exist are solved, the fused deposition modeling (FDM) technology is adopted, the diameter of a nozzle is 0.2 mm, and a pipe body is printed by polylactic acid (PLA) resin in a segmented mode. Support-free printing and self-alignment assembly are realized through 45-degree inclined plane notches on the upper tube body of 195 mm, the middle tube body of 195 mm and the lower tube body of 200 mm of the three sections of tube bodies; the hole diameters of the seventh hole and the third hole in the seven-hole layout are 3.5 mm, and the hole diameters of the other holes are 5 mm, so that the seven-hole layout is adaptive to little finger pressing; the total weight of 275 g is reduced by 35% compared with 360-430 g of traditional Yueight. The design has the advantages of traditional phoneme reproduction and industrial production.

Description

TECHNICAL FIELD

[0001] The utility model relates to musical instrument manufacturing technical field, concretely is a three -section type musical instrument chi eight. BACKGROUND

[0002] Traditional bamboo chi eight has the following defects:

[0003] 1、Material and process defects: need special bamboo growth 3 to 5 years of bamboo root, internal diameter curve relies on hand cutting, and the production cycle from material selection to manufacturing generally needs more than 5 years, and the good product rate is less than 30%, and the unit price is more than 2000 yuan;

[0004] 2、Poor environmental adaptability: bamboo is easy to mildew in the south, and easy to dry crack in the north, and the maintenance cost is high;

[0005] 3、Insufficient controllability: the traditional five-hole design has limited sound range, and the little finger is easy to slip out of the hole, and the weight of the integrated structure is 360-430g, which easily leads to holding fatigue. INVENTION CONTENTS

[0006] Therefore, the utility model aims at providing a three -section type musical instrument chi eight, optimizing chi eight structure, through three -section type inclined plane connecting structure, little finger optimization hole site design and low -cost manufacturing process, solve traditional bamboo chi eight material difficult to obtain, process complex and holding defect problem. Adopt fused deposition modeling (FDM) technology, nozzle diameter 0.2mm, and the pipe body is segmented by polylactic acid (PLA) resin printing. Three -section pipe body (upper pipe body 195mm, middle pipe body 195mm, lower pipe body 200mm) realizes exempt support printing and self -aligning assembly through 45° inclined plane cutout;The hole diameter of the 7th hole and the 3rd hole in the seven-hole layout is 3.5mm, and the hole diameter of the remaining holes is 5mm, which is suitable for the little finger pressing;The total weight 275g is 35% lighter than the traditional chi eight (360-430g). The design has the advantages of traditional tone bit reproduction and industrial production.

[0007] To solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme: a three -section type musical instrument chi eight, comprising:

[0008] Chi eight structure, the chi eight structure includes the upper pipe body, the middle pipe body and the lower pipe body arranged;

[0009] Among them, the top surface of the upper pipe body is provided with a mouthpiece, and the connection of the upper pipe body, the middle pipe body and the lower pipe body is provided with a 45° inclined plane cutout, the middle pipe body is distributed with the 1st hole, the 2nd hole, the 3rd hole and the 4th hole, and the lower pipe body is distributed with the 7th hole, the 5th hole and the 6th hole.

[0010] As a kind of preferred scheme of the three-section musical instrument dizi of the utility model, it further includes dizi bottom surface, the dizi bottom surface is located at the bottom surface of lower pipe body.

[0011] As a kind of preferred scheme of the three-section musical instrument dizi of the utility model, it further includes winding protruding slot, the winding protruding slot annularly is arranged on the outer wall of upper pipe body;

[0012] Wherein, protruding slot diameter 0.2±0.05mm, width 20±1mm, 0.3mm diameter 8 cotton threads are wound in slot;

[0013] Winding mode is traditional flute binding thread mode winding.

[0014] As a kind of preferred scheme of the three-section musical instrument dizi of the utility model, wherein, the specification of the upper pipe body is 195±1mm, the specification of the middle pipe body is 195±1mm, the specification of the lower pipe body is 200±1mm.

[0015] As a kind of preferred scheme of the three-section musical instrument dizi of the utility model, wherein, in the dizi structure, upper segment is concave 20±0.5mm, lower segment is convex 20±0.5mm, interference fit tolerance is 0.1±0.02mm, total length is 550±2mm after assembly.

[0016] As a kind of preferred scheme of the three-section musical instrument dizi of the utility model, wherein, the height of seven hole positions from dizi bottom surface is:

[0017] The height of the 7th hole is 93±1mm, and the hole diameter is 3.5±0.1mm;

[0018] The height of the 6th hole is 122±1mm, and the hole diameter is 5±0.2mm;

[0019] The height of the 5th hole is 172±1mm, and the hole diameter is 5±0.2mm;

[0020] The height of the 4th hole is 220±1mm, and the hole diameter is 5±0.2mm;

[0021] The height of the 3rd hole is 242±1mm, and the hole diameter is 3.5±0.1mm;

[0022] The height of the 2nd hole is 283±1mm, and the hole diameter is 5±0.2mm;

[0023] The height of the 1st hole is 320±1mm, and the hole diameter is 5±0.2mm.

[0024] As a preferred scheme of the three-section musical instrument dizi of the utility model, the 45° bevel cutout width is 1.5±0.1 mm, the inner concave / outer convex bevel is printed synchronously, and the inner wall roughness is Ra≤0.8 μm.

[0025] As a preferred scheme of the three-section musical instrument dizi of the utility model, the nozzle diameter of the dizi structure is 0.2 mm, the printing line diameter is 0.08 mm, the layer thickness is 0.08 mm, and the total weight is 275±10 g.

[0026] Compared with the prior art, the utility model has the advantages that:

[0027] 1. Bevel support-free connecting structure:

[0028] 1) The 45° bevel cutout is adopted at the connecting position of the three-section pipe body, the upper section is concave by 20 mm, the lower section is convex by 20 mm outward, support-free printing is realized by using the FDM layer-by-layer accumulation characteristics, the inner wall roughness is Ra≤0.8 μm (the traditional plane connecting inner concave surface printing process needs to be supported, and the roughness is Ra≥3.2 μm);

[0029] 2) The interference fit tolerance of 0.1 mm ensures self-alignment assembly, and the offset error is less than 0.05 mm.

[0030] 2. Small finger optimized hole position design:

[0031] 1) The hole diameter of the 7th hole (93 mm in height) and the 3rd hole (242 mm in height) is 3.5 mm, which is reduced by 30% compared with the traditional 5 mm hole diameter, and is suitable for pressing by the small finger and the ring finger;

[0032] 2) The seven holes are designed to be circular table convex outwards from the pipe outer wall, the circular table height is 3±0.5 mm, the circular table bottom diameter is 5±0.5 mm, the top diameter is 3.5±0.5 mm, and accurate reproduction is realized based on the 3D model coordinate positioning. According to the natural holding state of the human hand, the small finger is placed in the natural position, and the point pressing is easy, the use comfort and efficiency are improved, and the risk of small finger fatigue and injury is reduced.

[0033] 3. Low-cost industrial production:

[0034] 1) PLA resin (unit price ￥50 / kg) is used to replace bamboo, and FDM printing parameters (nozzle 0.2 mm, layer thickness 0.08 mm) are used to ensure that the pipe body wall thickness is 2.5±0.2 mm, and the total weight is 275 g;

[0035] 2) The single-piece production cost is less than ￥200 (the traditional bamboo dizi is more than ￥2000), and it is moisture-resistant and anti-cracking. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to make the technical scheme of the embodiments of the present application clearer, the present application will be described in detail below with reference to the drawings and specific embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings. Among them:

[0037] Figure 1 is a structural diagram of the present application;

[0038] Figure 2 is a seven-hole position diagram of the present application;

[0039] Figure 3 is a lower pipe body side view of the present application;

[0040] Figure 4 is a traditional plane connection and inclined plane connection cross-section comparison diagram of the present application.

[0041] In the figure: 1, mouthpiece; 2, upper pipe body; 3, winding convex groove; 4, 45° inclined plane notch; 5, middle pipe body; 6, lower pipe body; 7, 7th hole; 8, 1st hole; 9, 2nd hole; 10, 3rd hole; 11, 4th hole; 12, 5th hole; 13, 6th hole; 14, chi eight bottom surface. DETAILED DESCRIPTION

[0042] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0043] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0044] Secondly, the present application is described in detail in combination with the schematic diagram, when the embodiments of the present application are described in detail, in order to facilitate the description, the cross-sectional view of the device structure will be partially enlarged without general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application here. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual production.

[0045] In order to make the purposes, technical schemes and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0046] The utility model provides a three -section type musical instrument chi eight, optimization chi eight structure, through three -section type bevel connecting structure, little finger optimization hole site design and low cost manufacturing process, solve traditional bamboo chi eight material difficult to obtain, process is complex and hold the defect problem. Adopt fused deposition modeling FDM technology, nozzle diameter 0.2mm, pipe body is by polylactic acid PLA resin segmentation printing. Three -section pipe body upper pipe body 195mm, middle pipe body 195mm, lower pipe body 200mm realize exempt support printing and self -alignment assembly through 45 bevel cut -out, seven hole layout 7th hole and 3rd hole aperture 3.5mm, the rest of the hole aperture 5mm, adapt little finger press; Total weight 275g is lighter than traditional chi eight 360-430g 35%. This design has traditional tone bit reproduction and industrial production advantage.

[0047] Figures 1 to 4 The overall structure schematic diagram of one embodiment of the utility model three -section type musical instrument chi eight is shown, please refer to Figures 1 to 4 The main structure of the embodiment includes: chi eight structure, chi eight structure includes the upper pipe body 2, middle pipe body 5 and lower pipe body 6 of setting;

[0048] Wherein, the top surface of the upper pipe body 2 is provided with a mouthpiece 1, and the connection of the upper pipe body 2, the middle pipe body 5 and the lower pipe body 6 is provided with a 45° bevel cut 4, the middle pipe body 5 is distributed with a first hole 8, a second hole 9, a third hole 10 and a fourth hole 11, and the lower pipe body 6 is distributed with a seventh hole 7, a fifth hole 12 and a sixth hole 13;

[0049] Specific manufacturing time:

[0050] 1, printing preparation:

[0051] 1, use the bamboo X1 Carbon printer, PLA resin material;

[0052] 2, set nozzle diameter 0.2mm, layer thickness 0.08mm, line width 0.08mm, filling density 70%;

[0053] 3, segmented printing upper pipe body, middle pipe body, lower pipe body, single segment printing time is about 8 hours.

[0054] 2, hole site forming:

[0055] 1, seven holes are directly formed when printing, the aperture of the 7th hole and the 3rd hole is 3.5mm, and the aperture of the remaining holes is 5mm;

[0056] 2, the hole height is reproduced according to the traditional chi eight standard, and the error is less than or equal to 0.5mm.

[0057] 3, connecting structure assembly:

[0058] 1, the upper segment recessed bevel and the lower segment convex bevel are matched through 45° cutout.

[0059] 2. Manual application of 5N axial pressure to complete interference fit, end face clearance 0.5mm.

[0060] 4. Thread binding process:

[0061] 1. Apply rosin to the annular thread groove 3;

[0062] 2. Use 0.3mm cotton thread to secure with cross winding method, winding density ≥ 5 turns / cm.

[0063] Although the present application has been described with reference to the embodiments above, various improvements can be made thereto and equivalents can be substituted therefor without departing from the scope of the present application. In particular, each of the features disclosed in the embodiments of the present application can be used in any combination with each other unless there is a structural conflict. The combinations of these features are not exhaustively described in the present specification only for the purpose of omitting the length and saving resources. Therefore, the present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A three-part musical instrument shakuhachi, characterized by, It comprises: A shaku-fue structure comprising an upper tube (2), a middle tube (5) and a lower tube (6) arranged; Wherein, the top surface of the upper tube (2) is provided with a mouthpiece (1), and the connection of the upper tube (2), the middle tube (5) and the lower tube (6) is provided with a 45° bevel cut (4), the middle tube (5) is distributed with a first hole (8), a second hole (9), a third hole (10) and a fourth hole (11), and the lower tube (6) is distributed with a seventh hole (7), a fifth hole (12) and a sixth hole (13).

2. The three-part Chinese ocarina according to claim 1, wherein, It also comprises a shaku-fue bottom surface (14) located at the bottom surface of the lower tube (6).

3. The three-part ocarina of claim 2, wherein, It also comprises a winding groove (3) annularly arranged on the outer wall of the upper tube (2); wherein, the groove diameter is 0.2±0.05mm, the width is 20±1mm, and 8 strands of cotton thread with a diameter of 0.3mm are wound in the groove.

4. The three-part ocarina of claim 3, wherein, The specification of the upper tube (2) is 195±1mm, the specification of the middle tube (5) is 195±1mm, and the specification of the lower tube (6) is 200±1mm.

5. A three-part Chinese ocarina according to claim 4, wherein, In the shaku-fue structure, the upper segment is concave by 20±0.5mm, the lower segment is convex by 20±0.5mm, the interference fit tolerance is 0.1±0.02mm, and the total length after assembly is 550±2mm.

6. A three-part Chinese ocarina according to claim 5, wherein: The height of the seven hole positions from the shaku-fue bottom surface (14) is: The height of the seventh hole (7) is 93±1mm, and the hole diameter is 3.5±0.1mm; The height of the sixth hole (13) is 122±1mm, and the hole diameter is 5±0.2mm; The height of the fifth hole (12) is 172±1mm, and the hole diameter is 5±0.2mm; The height of the fourth hole (11) is 220±1mm, and the hole diameter is 5±0.2mm; The height of the third hole (10) is 242±1mm, and the hole diameter is 3.5±0.1mm; The height of the second hole (9) is 283±1mm, and the hole diameter is 5±0.2mm; The height of the first hole (8) is 320±1mm, and the hole diameter is 5±0.2mm.

7. A three-part Chinese ocarina according to claim 6, wherein: The width of the 45° bevel cut (4) is 1.5±0.1mm, the inner concave / outer convex bevel is printed synchronously, and the inner wall roughness Ra is ≤0.8μm.

8. A three-part Chinese ocarina according to claim 7, characterized in that: The nozzle diameter of the shaku-fue structure is 0.2mm, the printing line diameter is 0.08mm, the layer thickness is 0.08mm, and the total weight is 275±10g.

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