Erhu sound starting device

Abstract

The utility model discloses an Erhu sound starting device which comprises a box body. The string limiting piece is arranged on the front face of the box body and used for limiting the two strings so that the two strings can be tightly attached to the box body; the fixing block is arranged on the back face of the box body and used for abutting against the skin so as to transmit vibration of the box body to the skin. The vibration generating mechanism comprises a rotating wheel, a motor, a potentiometer and a control circuit, the rotating wheel is eccentrically fixed on an output shaft of the motor, the motor is fixed in the box body, the eccentric wheel can impact the box body at least once when rotating by a circle, the motor is controlled by the control circuit, the potentiometer is connected into the control circuit, and the control circuit is connected with the motor. The potentiometer is provided with an adjusting knob, and the adjusting knob is used for changing the resistance value of the potentiometer and further changing the voltage of the control circuit so as to adjust the rotating speed of the motor; the Erhu sound box has the advantages of being small in size, convenient to carry, low in cost and convenient to use, can effectively improve the sound quality of the Erhu in a short time, and can be used for daily maintenance of the Erhu.

Description

Technical Field

[0001] The utility model relates to the technical field of erhu, in particular to an erhu sound opening device. Background Art

[0002] When a new erhu starts to be played, the sound is dull, the noise is prominent, the wolf tone is frequent, the sound is dry and not soft, etc. It needs a period of conditioning or so-called running-in period, that is, sound opening. The erhu makes sound by driving the python skin to vibrate through the strings. The python skin is the core component of the erhu. At the beginning, the python skin is relatively tight, and its fiber tissue is in a disordered state. The sound emitted is not harmonious and unified, and the sound is raw, hard and noisy, which sounds uncomfortable and unpleasant. Therefore, sound opening is required.

[0003] The invention patent with the Chinese patent application number 201710145230 provides an erhu ultrasonic sound opening machine. An elevating pressure head is installed on the workbench of the sound opening machine, and an ultrasonic vibrator is arranged below the elevating pressure head. The ultrasonic vibrator is connected to the output end of an ultrasonic generator, and the erhu skin is pressed below the ultrasonic vibrator. Its working principle is: the ultrasonic vibrator converts the ultrasonic energy from the ultrasonic generator into mechanical vibration, simulates the pressure of the strings on the sound post part of the skin, and then conducts intensified mechanical vibration on the skin, improves the stress distribution inside the skin, and improves the sound quality of the skin sound, so as to achieve the purpose of "sound opening" for the erhu.

[0004] However, the ultrasonic generator used in this sound opening machine is large in volume and high in cost. This sound opening machine has the defects of being inconvenient to carry, high in price, complex in structure and inconvenient to use. Content of the Utility Model

[0005] Aiming at the defects in the prior art, the utility model provides an erhu sound opening device, which has the advantages of small volume, convenient to carry, low cost and convenient to use, can effectively improve the sound quality of the erhu in a short time, and can be used for the daily maintenance of the erhu.

[0006] The technical solution of the utility model is specifically as follows:

[0007] An erhu sound opening device, comprising:

[0008] A box body;

[0009] A string limiting member, arranged on the front of the box body, used for limiting two strings so that the two strings are in close contact with the box body;

[0010] A fixing block, arranged on the back of the box body, used for contacting with the skin to transmit the vibration of the box body to the skin;

[0011] Adjustable vibration mechanism, the adjustable vibration mechanism includes a runner, a motor, a potentiometer and a control circuit. The runner is eccentrically fixed on the output shaft of the motor. The motor is fixed in a box body. The runner can hit the box body at least once during one rotation. The motor is controlled by the control circuit. The potentiometer is connected to the control circuit. The potentiometer has an adjustment knob. The adjustment knob is used to change the resistance value of the potentiometer, thereby changing the voltage of the control circuit to adjust the motor speed.

[0012] Preferably, the box body includes a receiving cavity and a cover body, and the receiving cavity and the cover body are detachably fixedly connected.

[0013] Preferably, the box body is rectangular parallelepiped-shaped. Installation columns are fixedly arranged at the four corner positions in the receiving cavity. Threaded holes are provided on each of the installation columns. Through holes are provided at the positions corresponding to the threaded holes on the cover body. The box body further includes four fastening bolts, and the fastening bolts are used to pass through the through holes and be threadedly connected with the corresponding threaded holes.

[0014] Preferably, an installation groove is provided on the cover body. The motor is detachably fixedly connected in the installation groove. The control circuit is arranged on a circuit board, and the circuit board is detachably fixedly installed in the receiving cavity.

[0015] Preferably, the adjustment knob of the potentiometer extends out from one side of the box body and is rotatably connected to the box body. The power cord of the motor extends out from the side of the box body away from the adjustment knob and is connected to a power supply.

[0016] Preferably, the string limiting member includes an installation block and string grooves. The installation block is fixed on the outer wall of the box body. Two string grooves are provided on the installation block, and the string grooves correspond to the strings one by one.

[0017] Preferably, the box body is specifically a rectangular parallelepiped with dimensions of 8 cm × 2 cm × 4 cm.

[0018] The beneficial effects of the present utility model are embodied in:

[0019] The erhu sound-opening device provided by the present utility model has the advantages of small volume, convenient to carry, low cost and easy to use. It can effectively improve the sound quality of the erhu in a short time and can be used for the daily maintenance of the erhu. Description of the Drawings

[0020] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts do not necessarily draw according to the actual scale.

[0021] Figure 1 Structural schematic diagram of the sound-opening device for erhu provided by the embodiment of the present utility model;

[0022] Figure 2 For Figure 1 Top view of the accommodation cavity of the sound-opening device for erhu shown;

[0023] Figure 3 For Figure 1 Bottom view of the cover body of the sound-opening device for erhu shown;

[0024] In the attached drawings, 11 - accommodation cavity, 111 - mounting post, 112 - threaded hole, 12 - cover body, 121 - through hole, 122 - mounting groove, 13 - fastening bolt, 2 - string limiting member, 21 - mounting block, 22 - string groove, 3 - fixing block, 4 - eccentric wheel, 5 - motor, 6 - potentiometer, 7 - adjusting knob, 8 - circuit board, 9 - power cord. Detailed implementation manners

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned attached drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so as to describe the embodiments of the present application here.

[0027] In the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", etc. is based on the orientation or positional relationship shown in the attached drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation.

[0028] Moreover, in addition to being able to represent the orientation or positional relationship, some of the above-mentioned terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances.

[0029] In addition, terms such as "arranged", "provided with", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components or parts. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0030] In addition, the meaning of the term "a plurality of" should be two or more.

[0031] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will describe this application in detail with reference to the drawings and in conjunction with the embodiments.

[0032] This embodiment provides a sound-opening device for an erhu, as Figures 1 to 3 shown, including:

[0033] A box body; specifically, the box body includes a receiving cavity 11 and a cover body 12. The receiving cavity 11 and the cover body 12 are detachably and fixedly connected to facilitate disassembling for operations such as replacing and repairing components such as the motor 5. In this embodiment, the box body is rectangular parallelepiped-shaped. Installation posts 111 are fixedly arranged at the four corners inside the receiving cavity 11, and threaded holes 112 are provided on each installation post 111. Through holes 121 are provided at positions corresponding to the threaded holes 112 on the cover body 12. The box body further includes four fastening bolts 13, and the fastening bolts 13 are used to pass through the through holes 121 and be threadedly connected to the threaded holes 112 corresponding to the through holes 121.

[0034] A string limiter 2, arranged on the front of the box body, for limiting two strings to make the two strings closely adhere to the box body. In this embodiment, the string limiter 2 includes a mounting block 21 and string grooves 22. The mounting block 21 is fixed on the outer wall of the box body, and two string grooves 22 are provided on the mounting block 21, and the string grooves 22 correspond to the strings one by one. The box body is preferably a rectangular parallelepiped with dimensions of 8 cm × 2 cm × 4 cm.

[0035] A fixing block 3, fixedly arranged on the back of the box body, for contacting the skin to transmit the vibration of the box body to the skin. The fixing block 3 can be circular or other shapes, and the fixing block 3 can be integrally formed with the box body.

[0036] Adjustable vibration mechanism. The vibration generating mechanism includes a runner, a motor 5, a potentiometer 6, and a control circuit. The runner is eccentrically fixed on the output shaft of the motor 5. The motor 5 is fixed inside the box body. The eccentric wheel 4 can strike the box body at least once during one rotation. The motor 5 is controlled by the control circuit. The potentiometer 6 is connected to the control circuit. The potentiometer 6 has an adjustment knob 7. The adjustment knob 7 is used to change the resistance value of the potentiometer 6, thereby changing the voltage of the control circuit to adjust the rotation speed of the motor 5. The adjustment knob 7 of the potentiometer 6 extends from one side of the box body and is rotatably connected to the box body. The power cord 9 of the motor 5 extends from the side of the box body away from the adjustment knob 7 and is connected to the power supply.

[0037] In this embodiment, an installation groove 122 is provided on the cover body 12. The motor 5 is detachably and fixedly connected in the installation groove 122. The control circuit is arranged on the circuit board 8. The circuit board 8 is detachably and fixedly installed in the accommodation cavity 11.

[0038] The working principle of this embodiment:

[0039] During use, the box body is clamped between the skin and the strings of the erhu. Specifically, the fixed block 3 is abutted against the skin, and then the string is clamped in the string groove 22 of the string limiting member 2. It should be noted that after the erhu sound opening device is assembled with the erhu, when the fixed block 3 abuts against the skin, the string also closely adheres to its corresponding string groove 22. Subsequently, the external power supply is plugged in, and the resistance value of the potentiometer 6 is adjusted by rotating the adjustment knob 7 of the potentiometer 6, so that the voltage in the control circuit changes, realizing the adjustment of the rotation speed of the motor 5, and further realizing the adjustment of the vibration frequency generated by the movement of the eccentric wheel 4 striking the box body. The vibration of the box body is transmitted to the skin of the erhu through the fixed block 3 fixed to it. After long-term vibration, the internal fibers of the skin are softened, the elasticity is enhanced, and the sound is thick. The vibration of the box body can also be transmitted to the strings through the string limiting member 2, and further transmitted to various parts of the body of the erhu through the strings, gradually integrating to produce a resonance effect. It is also possible to perform key vibration on the key sound areas prone to wolf tones until the wolf tones disappear. Generally, the vibration frequency is gradually changed from slow to fast, and the sound quality of the erhu can be significantly improved in one week. This device can be used to improve the sound quality of the erhu during daily maintenance or before playing, and no additional fixing device is required. The operation is simple, the effect is remarkable, and the practicability is very strong.

[0040] In this embodiment, in order to facilitate the maintenance, replacement and other operations of the components inside the box body, the box body specifically includes an accommodation cavity 11 and a cover body 12. The accommodation cavity 11 and the cover body 12 are designed to be detachably and fixedly connected. Specifically, it can be as Figures 1 to 3As shown in the figure, the box body is preferably a cuboid with dimensions of 8 cm × 2 cm × 4 cm. Mounting posts 111 are fixedly arranged at the four corners of the accommodation cavity 11, and threaded holes 112 are provided on each mounting post 111. Through holes 121 are provided at positions corresponding to the threaded holes 112 on the cover body 12. The box body further includes four fastening bolts 13, which are used to pass through the through holes 121 and be threadedly connected to the corresponding threaded holes 112. The cover body 12 and the accommodation cavity 11 are fixed by the four fastening bolts 13, which is convenient and fast for disassembly and assembly. Further, an installation groove 122 is provided on the cover body 12, and the motor 5 is detachably fixedly connected in the installation groove 122. The control circuit is arranged on the circuit board 8, and the circuit board 8 is detachably fixedly installed in the accommodation cavity 11.

[0041] In this embodiment, as Figures 1 to 2 shown, for the convenience of operation, the adjustment knob 7 of the potentiometer 6 extends out from one side of the box body and is rotatably connected to the box body. The power cord 9 extends out from the side of the box body away from the adjustment knob 7 and is connected to the power supply, so that the power supply, the motor 5, the potentiometer, and the control circuit form a loop.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A device for opening the sound of an erhu, characterized in that: include: Box body; The string limiting member is arranged on the front side of the box body and is used to limit the two strings so that the two strings are in close contact with the box body; A fixing block is arranged on the back of the box body and is used to contact with the skin to transmit the vibration of the box body to the skin; An adjustable vibration mechanism includes a rotating wheel, a motor, a potentiometer and a control circuit. The rotating wheel is eccentrically fixed on the output shaft of the motor. The motor is fixed in a box body. The rotating wheel can hit the box body at least once in one rotation. The motor is controlled by a control circuit. The potentiometer is connected to the control circuit. The potentiometer has an adjusting knob. The adjusting knob is used to change the resistance value of the potentiometer, thereby changing the voltage of the control circuit to adjust the motor speed.

2. The erhu tone opening device according to claim 1, characterized in that: The box body comprises a containing cavity and a cover body, and the containing cavity and the cover body are detachably fixedly connected.

3. The erhu tone opening device according to claim 2, characterized in that: The box body is in the shape of a rectangular parallelepiped, and mounting posts are fixedly provided at the four corners of the accommodating cavity. A threaded hole is provided on each of the mounting posts, and a through hole is provided at a position of the cover body corresponding to each threaded hole. The box body also includes four fastening bolts, which are used to pass through the through holes and be threadedly connected with the threaded holes corresponding to the through holes.

4. The erhu tone opening device according to claim 3, characterized in that: The cover body is provided with a mounting groove, the motor is detachably fixedly connected in the mounting groove, the control circuit is arranged on a circuit board, and the circuit board is detachably fixedly installed in the accommodating cavity.

5. The erhu tone opening device according to claim 1, characterized in that: The adjusting knob of the potentiometer extends from one side of the box body and is rotatably connected to the box body, and the power line of the motor extends from a side of the box body away from the adjusting knob and is connected to the power supply.

6. The erhu tone opening device according to claim 1, characterized in that: The string limiting member comprises a mounting block and a string groove. The mounting block is fixed to the outer wall of the box body. Two string grooves are arranged on the mounting block. The string grooves correspond to the strings one by one.

7. The erhu tone opening device according to claim 3, characterized in that: The box body is specifically in the shape of a cuboid of 8 cm×2 cm×4 cm.

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