Mechanism convenient for adjusting tension of python skin of erhu

Abstract

The utility model belongs to the field of Erhu, and relates to a mechanism for conveniently adjusting tension of a python skin of an Erhu, which comprises an Erhu tube and a tension adjusting mechanism. One end of the cylinder is provided with an opening, and a plurality of positioning holes are arranged around the opening. The tension adjusting mechanism comprises a pressing ring, python skin, a movable supporting ring, a fixed supporting ring, a gasket, a plurality of positioning pins and a plurality of jackscrews, the fixed supporting ring comprises an installation side and a skin side, the positioning pins are fixedly connected with the installation side, and the ends, away from the fixed supporting ring, of the positioning pins are inserted into the positioning holes. According to the utility model, the tension adjusting mechanism is inserted into one end of the sound box through the positioning pin and then is pressed on the sound box by the strings, so that the tension adjusting mechanism is convenient to disassemble. The mounting side is exposed after the tension structure is detached, and the jackscrew is screwed from the mounting side to adjust the tension of the python skin. The whole operation process is simple and convenient, a user can timely adjust the tension of the python skin, and the timbre quality of the urheen is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of erhu, and relates to a mechanism for conveniently adjusting the tension of an erhu python skin. Background Art

[0002] The national musical instrument Erhu has a long history in China. It was recorded in historical documents that it appeared in the Tang Dynasty. The Xiqin at that time was the predecessor of Erhu. The diaphragm of Erhu is made of animal leather. In modern times, python skin is mainly used as the main material for making Erhu diaphragm. Python skin is the most ideal main material for making Erhu because of its moderate thickness, good toughness, high surface hardness, and the outer skin of the python composed of organic fiber and surface hardened cuticle. Python skin becomes very soft when soaked in water, and becomes very hard after air drying. It is precisely by utilizing this characteristic of the python skin that the python skin is soaked in water before being covered with the erhu skin, and then the python skin is tightened and glued to the sound box with glue through a simple noose mechanism. In order to obtain a good erhu sound, the python skin of a new erhu is generally covered very tightly, which means that the surface tension of the python skin is very large. The general service life of an erhu is between 5 and 10 years. The python skin will gradually become fatigued after enduring high tension for a long time. In addition, the positive pressure exerted on the python skin by the strings through the bridge during playing will cause the tension of the python skin to decrease year by year, commonly known as "collapsed skin". In the end, the reason why an erhu was finally eliminated was not because of problems with the wooden structure, but because the tension of the python skin decreased, causing the sound to become muffled, and the performer had to abandon the erhu that he had bought at a high price. Therefore, before the new erhu leaves the factory, the python skin is covered very tightly, which means that the surface tension is particularly large. After buying a new instrument, the performer generally needs to endure a long transition period of more than two years, in which the sound of the erhu is harsh and the volume is low due to the over-tightening of the python skin. The manufacturer explains that the new instrument needs a running-in period. After 1 to 2 years, the tension of the python skin decreases, and the tension of the python skin of the erhu is in the most ideal state, because the sound of the erhu during this period makes the performer feel most satisfied, the sound is no longer so harsh, and the volume becomes louder. After the optimal period, as the tension of the python skin continues to decrease, the sound of the erhu gradually deteriorates, the volume of the high notes decreases, and the sound becomes more low. The fundamental reason for this problem is that the tension of the python skin of the new erhu is fixed. After the python skin is pulled to a certain tension, it is glued to the wooden sound box with glue. If the tension of the python skin decreases during the subsequent use, the sound of the entire erhu cannot be maintained in the best state. In order to extend the service life of the erhu, the new erhu skin is generally tight and the surface tension of the python skin is too large. After buying a new erhu, the performer can only helplessly endure the unsatisfactory sound quality of the erhu and spend the so-called "running-in period" of 1 to 2 years.

[0003] The application document with the application number 201020269136.X discloses an erhu with adjustable skin tension. In this application document, a movable push ring is pressed on the skin, and the push ring is moved by rotating a bolt to adjust the skin tension. However, the bolt in this application document is arranged inside the sound box, so the sound box needs to be disassembled to adjust the bolt. Moreover, the sound box in this application document is not convenient for disassembly and assembly. Therefore, it is not convenient to adjust the skin (python skin) tension again after the skin becomes loose. Summary of the Invention

[0004] The present invention aims at the above problems and provides a tension adjustment mechanism that is convenient to disassemble from the sound box, and the tension adjustment mechanism itself is convenient to adjust the python skin tension.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a mechanism for conveniently adjusting the python skin tension of an erhu, including a sound box and a tension adjustment mechanism;

[0006] One end of the sound box is set to be open, and a plurality of positioning holes are arranged around the open end;

[0007] The tension adjustment mechanism includes a retaining ring, a python skin, a movable support ring, a fixed support ring, a washer, a plurality of positioning pins, and a plurality of setscrews. The fixed support ring includes an installation side and a skin side. The plurality of positioning pins are fixedly connected to the installation side, and the end of the positioning pin away from the fixed support ring is inserted into the positioning hole. A plurality of setscrews are threadedly connected to the fixed support ring. The two ends of the plurality of setscrews respectively pass through the installation side and the skin side, and the end of the setscrew on the skin side abuts against the movable support ring. The python skin is covered on the movable support ring, and the retaining ring presses the edge of the python skin against the fixed support ring.

[0008] Preferably, the plurality of positioning holes are evenly distributed around the center of the open end.

[0009] Preferably, the washer is arranged between the sound box and the fixed support ring.

[0010] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0011] The tension adjustment mechanism of the present invention is inserted into one end of the sound box through the positioning pin and then pressed against the sound box by the strings, so the tension adjustment mechanism of the present invention is convenient to disassemble. After the tension structure is disassembled, the installation side is exposed, and the setscrew is screwed from the installation side to adjust the python skin tension. The whole operation process is simple and convenient, which is convenient for the user to adjust the python skin tension in time and ensure the tone quality of the erhu. Description of the Drawings

[0012] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0013] Figure 1 It is a structural schematic diagram of the sound box and the tension adjustment mechanism;

[0014] Figure 2 It is an exploded view of the tension adjustment mechanism;

[0015] Figure 3 It is a structural schematic diagram of the fixed support ring;

[0016] Figure 4 It is a sectional view of the tension adjustment mechanism.

[0017] In the above figures, 1 is the sound box; 11 is the open end; 12 is the positioning hole; 2 is the tension adjustment mechanism; 21 is the retaining ring; 22 is the python skin; 23 is the movable support ring; 24 is the fixed support ring; 241 is the installation side; 242 is the skin covering side; 25 is the washer; 26 is the setscrew; 27 is the positioning pin. Detailed implementation manners

[0018] In order to more clearly understand the above objects, features and advantages of the present utility model, the following further describes the present utility model in conjunction with the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0019] In the following description, many specific details are set forth to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0020] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, a mechanism for conveniently adjusting the tension of the python skin of an erhu includes a sound box 1 and a tension adjustment mechanism 2;

[0021] One end of the sound box 1 is provided with an open end 11, and a plurality of positioning holes 12 are arranged around the open end 11;

[0022] The tension adjusting mechanism 2 includes a retainer ring 21, python skin 22, a movable support ring 23, a fixed support ring 24, a washer 25, a plurality of positioning pins 27, and a plurality of setscrews 26. The fixed support ring 24 includes an installation side 241 and a skin side 242, which are the front and back sides of the fixed support ring 24. A plurality of positioning pins 27 are fixedly connected to the installation side 241. One end of the positioning pin 27 away from the fixed support ring 24 is inserted into the positioning hole 12. A plurality of setscrews 26 are threadedly connected to the fixed support ring 24. Both ends of the plurality of setscrews 26 pass through the installation side 241 and the skin side 242 respectively. The end of the setscrew 26 on the skin side 242 abuts against the movable support ring 23. The python skin 22 is covered on the movable support ring 23. The retainer ring 21 presses the edge of the python skin 22 against the fixed support ring 24.

[0023] Specifically, the present utility model is provided with a positioning hole 12 on the sound box 1, and a corresponding positioning pin 27 is provided in the tension adjusting mechanism 2. After aligning the positioning hole 12 and the positioning pin 27, the positioning pin 27 is inserted into the positioning hole 12 to combine the tension adjusting mechanism 2 with the sound box 1. In the prior art, the erhu also includes strings and a sound post. Both ends of the strings are respectively connected to the top of the sound post and the bottom of the sound box 1, and the strings press the python skin 22. For the present utility model, the strings can play the role of pressing the tension adjusting mechanism 2 against the sound box 1. At the same time, in the prior art, the strings are convenient to adjust the tightness and disassemble, which will not be elaborated in the present utility model. When it is necessary to remove the tension adjusting mechanism 2, just loosen the strings.

[0024] Python skin 22 tension adjustment process: After removing the tension adjusting mechanism 2, turn the setscrew 26 on the installation side 241. When the setscrew 26 pushes the movable support ring 23 away from the fixed support ring 24, since the retainer ring 21 presses the edge of the python skin 22 against the fixed support ring 24, the movable support ring 23 can make the python skin 22 taut.

[0025] Furthermore, a plurality of positioning holes 12 are evenly distributed around the center of the opening 11.

[0026] Furthermore, the washer 25 is provided between the sound box 1 and the fixed support ring 24.

[0027] In addition, the retainer ring and the fixed support ring are similar in shape to a hollow multi-frustum, with the top being smaller and the bottom being larger, and each side is inclined. During the process of the retainer ring approaching the fixed support ring, the gap between the two gradually decreases. Therefore, the friction between the retainer ring and the python skin and between the python skin and the fixed support ring becomes larger and larger. After using tools such as a hammer to knock the retainer ring to the predetermined position, it is very difficult for the retainer ring to move.

[0028] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A mechanism for conveniently adjusting the tension of the python skin of an erhu, characterized in that, It includes a sound box and a tension adjusting mechanism; One end of the sound box is set to be open, and a number of positioning holes are arranged around the open end; The tension adjusting mechanism includes a retaining ring, python skin, movable support ring, fixed support ring, washer, a number of positioning pins and a number of setscrews. The fixed support ring includes an installation side and a skin covering side. A number of the positioning pins are fixedly connected to the installation side. The end of the positioning pin away from the fixed support ring is inserted into the positioning hole. A number of setscrews are threadedly connected to the fixed support ring. The two ends of a number of the setscrews respectively pass through the installation side and the skin covering side. The end of the setscrew on the skin covering side abuts against the movable support ring. The python skin is covered on the movable support ring. The retaining ring presses the edge of the python skin against the fixed support ring.

2. The mechanism for conveniently adjusting the tension of the python skin of the erhu according to claim 1, characterized in that, A number of the positioning holes are evenly distributed around the center of the open end.

3. A mechanism for conveniently adjusting the tension of the python skin of an erhu according to claim 1, characterized in that, The washer is arranged between the sound box and the fixed support ring.

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