Automatic tuning device for violin

Abstract

An automatic tuning device for a violin comprises a shell, a control panel, a microphone, a display screen, a motor and a fixing seat, the control panel is electrically connected with the microphone, the display screen and the motor, the control panel is fixed in the shell, the microphone, the display screen and the motor are arranged on the shell, and the fixing seat is fixed on the shell. An output shaft of the motor extends downwards to the lower side of the shell, a sleeve matched with a fine tuning knob on the front portion of a violin tailpiece is arranged on the output shaft, and the fixing base is used for being detachably fixed to the rear portion of the tailpiece. A position adjusting mechanism used for adjusting the position of the shell so that the sleeve can be arranged on a target fine adjustment knob in a sleeving mode is arranged on the shell, and the position adjusting mechanism is connected with the shell. Compared with the prior art, the tuning peg does not act on the tuning peg for tuning, but acts on the fine tuning knob of the tailpiece for tuning, and the fine tuning knob is easier to rotate and is more beneficial to fine tuning compared with the tuning peg, so that the tuning is more accurate and more stable.

Description

Technical Field

[0001] The utility model belongs to the technical field of musical instrument tuning, and in particular relates to an automatic tuning device for a violin. Background Art

[0002] At present, the proportion of kindergarten children learning piano is as high as over 60%, and that of primary school students reaches 30%. The total number of piano children in China exceeds 30 million, and is still growing at a rate of 10% each year.

[0003] A large amount of time spent playing the violin is actually dealing with pitch. Whether it is the tuning of the violin before playing or the change of pitch during performance, the player is required to make adjustments personally. The variability of the violin's pitch is one of the important reasons for the violin's strong technicality and one of the reasons for its great charm.

[0004] For violin learners, the biggest challenge is tuning the violin. Whether they are in the initial stage or have passed the "tenth level" of violin, they will have to ask the teacher for help before each practice because they cannot tune the instrument by themselves, which seriously reduces their practice efficiency.

[0005] Existing tuning tools usually tune the violin through the pegs, such as the Chinese invention patent with publication number CN110782861A: A violin automatic tuner, which includes a microphone with a USB interface, a Raspberry Pi, a motor driver board, a motor, a connecting device, a touch screen, and a battery pack. Among them, the microphone is used to collect violin audio, and the Raspberry Pi is used to analyze the audio and control the motor to rotate the pegs to achieve automatic tuning. Since the pegs are not easy to rotate, it is difficult to fine-tune them, resulting in inaccurate tuning. Utility Model Content

[0006] Based on this, in order to solve the above technical problems, a violin automatic tuning device is provided.

[0007] The technical solutions adopted in this utility model are as follows:

[0008] A violin automatic tuning device includes a control panel, a microphone, a display screen, and a motor, wherein the control panel is electrically connected to the microphone, the display screen, and the motor, and further includes:

[0009] a housing, wherein the control panel is fixed in the housing, the microphone, the display screen, and the motor are arranged on the housing, and the output shaft of the motor extends downward to the lower side of the housing and is provided with a sleeve adapted to the fine-tuning knob on the front of the violin tailpiece;

[0010] A fixing base is used for detachably fixing to the rear part of the tailpiece, and a position adjustment mechanism is provided on the fixing base for adjusting the position of the shell so that the sleeve can be sleeved on the target fine-tuning knob. The position adjustment mechanism is connected to the shell.

[0011] Compared with the prior art, the automatic violin tuning device provided by the present invention does not tune the violin by acting on the pegs, but rather by acting on the fine-tuning knob of the tailpiece. Since the fine-tuning knob is easier to rotate than the pegs and is more conducive to fine-tuning, the tuning is more accurate and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the fixing seat of the utility model;

[0015] Figure 3 This is a schematic diagram of the electrical structure of the utility model. DETAILED DESCRIPTION

[0016] The following will illustrate the implementation of the present utility model in conjunction with the drawings in the specification. It should be noted that the implementation methods involved in this specification are not exhaustive and do not represent the only implementation methods of the present utility model. The following corresponding embodiments are only for the purpose of clearly illustrating the utility model content of the utility model patent and are not intended to limit its implementation methods. For ordinary technicians in this field, different forms of changes and modifications can be made on the basis of the description of this embodiment. All obvious changes or modifications that belong to the technical concept and utility model content of the present utility model are also within the scope of protection of the present utility model.

[0017] like Figure 1 and Figure 3 As shown, an embodiment of the present invention provides an automatic tuning device for a violin, comprising a housing 110 , a control panel 120 , a microphone 130 , a display screen 140 , a switch 150 , a motor 160 , a power supply 170 , a fixing base 180 and a position adjustment mechanism 190 .

[0018] The front plate 111 of the housing 110 has three mounting slots for mounting the microphone 130 , the display screen 140 and the motor 160 , respectively.

[0019] The control board 120 is fixed in the inner cavity of the housing 110 , and a single-chip microcomputer (such as an ATmega328P single-chip microcomputer) is disposed on the control board 120 .

[0020] The microphone 130, the display screen 140 and the motor 160 are respectively installed in the three installation slots. Figure 1 The switch 150 is also provided on the housing 110. The microphone 130, the display screen 140, the switch 150 and the motor 160 are all electrically connected to the control board 120. Figure 3 .

[0021] The microphone 130 uses a max4466 sound sensor to collect the audio of the violin, the display screen 140 uses an OLED display screen for human-computer interaction during tuning, and the switch 150 is used to start or shut down the tuning device.

[0022] The motor 160 is an N20 DC reduction motor, which is used to rotate the fine-tuning knob 21 at the front of the violin tailpiece 2. Its output shaft 161 extends downward to the lower side of the shell 110, and is provided with a sleeve 162. The opening of the sleeve 162 faces downward, and the interior is adapted to the fine-tuning knob 21.

[0023] The power supply 170 is used to supply power to the tuning device.

[0024] The control board 120 is used to analyze the audio collected by the microphone 130 and control the output shaft 161 of the motor 160 to rotate, thereby driving the fine-tuning knob 21 to rotate.

[0025] The fixing seat 180 is used to be detachably fixed to the rear portion of the tailpiece 2, and may be a spring clamp seat. Figure 2 As shown, when in use, the arms 181 on the left and right sides hold the tailpiece 2 tightly under the action of the spring.

[0026] In one embodiment, the upper ends of the left and right arms 181 of the spring clamp seat are hinged to the left and right sides of the top of the clamp seat, and a tension spring is respectively arranged between the left and right arms 181 and the top of the fixed seat. For the specific structure, please refer to patent document 1 (publication number: CN108144266A, publication date: 2018-06-12).

[0027] In another embodiment, an axis is set at the top of the spring clamp seat, and a torsion spring is set on the axis. The upper ends of the left and right arms 181 are connected to the two torsion arms of the torsion spring. The specific structure can be referred to Patent Document 2 (Publication Number: CN218839705U, Publication Date: 2023-04-11).

[0028] like Figure 1 As shown, a position adjustment mechanism 190 is provided on the fixing seat 180 for adjusting the position of the housing 110 so that the sleeve 162 is sleeved onto the target fine-tuning knob. The position adjustment mechanism 190 is connected to the housing 110 .

[0029] The position adjustment mechanism 190 includes a slider 191 and a connecting shaft 192 .

[0030] like Figure 2 As shown, the top surface of the fixed seat 180 has a slide groove 182 in the front-to-back direction and an adjustment seat 183 located in front of the slide groove 182. The bottom of the slider 191 slides horizontally back and forth in the slide groove 182, thereby realizing the front-to-back horizontal sliding cooperation between the slider 191 and the top surface of the fixed seat. A horizontal threaded hole in the front-to-back direction is provided in the adjustment seat 183. The horizontal threaded hole is passed through by the adjusting screw 183a from front to back. The adjusting screw 183a penetrates the slider 191 and is threadedly connected to the slider 191. Operating the adjusting screw 183a to move forward or backward in the horizontal threaded hole can make the slider 191 move backward or forward in the slide groove 182, thereby adjusting and locking the position of the slider 191 in the slide groove 182.

[0031] The slider 191 has an axial hole for the connecting shaft 192 to be raised and lowered and horizontally rotated, and a locking screw hole circumferentially connected to the axial hole. A locking screw 193 is provided in the locking screw hole. The lower end of the connecting shaft 192 is passed through the axial hole, and its upper end is connected to the lower plate of the shell 110. Operating the locking screw 193 can lock the height and horizontal angle of the connecting shaft 192.

[0032] By adjusting the front and rear positions of the slider 191 , as well as the height and horizontal angle of the connecting shaft 192 , the sleeve 162 can be put onto any fine-tuning knob 21 of the tailpiece 2 .

[0033] In actual scenarios, the fine-tuning knob 21 of some violins may be at a certain angle to the horizontal plane. Therefore, in order to enable the sleeve 162 to be smoothly inserted into the fine-tuning knob 21, a universal head 194 is provided between the upper end of the connecting shaft 192 and the housing 110.

[0034] The use process of the violin automatic tuning device of the utility model embodiment is as follows:

[0035] 1. Fix the tuning device to the rear of the tailpiece 2 via the fixing base 180.

[0036] 2. Operate the position adjustment mechanism 190 to put the sleeve 162 onto the fine tuning knob 21 corresponding to the A string.

[0037] 3. Press switch 150 to activate the tuning device, then pluck the A string. Microphone 130 collects the audio of the A string. Control board 120 analyzes the audio collected by microphone 130 to obtain the frequency, i.e., the pitch, of the audio. This pitch is compared with the target pitch of the A string to obtain a pitch difference. Based on the pitch difference, motor 160 is controlled to rotate fine-tuning knob 21 by a corresponding angle, thereby completing automatic tuning of the A string.

[0038] The corresponding relationship between the pitch difference and the motor rotation angle can be obtained in advance through a limited number of experiments and stored in the control board 120.

[0039] Repeat steps 2 and 3 above to automatically tune the E, D, and G strings.

[0040] After testing, violins of different models and years (1 / 2, 4 / 4) were tuned using the tuning device of the embodiment of the utility model, and the stability and accuracy of the intonation were significantly improved. Table 1 shows the intonation errors of each string of violins of different models and years.

[0041] Data (error size):

[0042] (Unit: Hz)

[0043]

[0044]

[0045] Table 1

[0046] From the above, it can be seen that the automatic violin tuning device provided by the embodiment of the utility model, compared with the prior art, does not tune the violin by acting on the pegs, but rather by acting on the fine-tuning knob of the tailpiece. Since the fine-tuning knob is easier to rotate than the pegs and is more conducive to fine-tuning, the tuning is more accurate and more stable.

[0047] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

Claims

1. A violin automatic tuning device, comprising a control panel, a microphone, a display screen, and a motor, wherein the control panel is electrically connected to the microphone, the display screen, and the motor, and wherein: Also includes: a housing, wherein the control panel is fixed in the housing, the microphone, the display screen, and the motor are arranged on the housing, and the output shaft of the motor extends downward to the lower side of the housing and is provided with a sleeve adapted to the fine-tuning knob on the front of the violin tailpiece; A fixing base is used for detachably fixing to the rear part of the tailpiece, and a position adjustment mechanism is provided on the fixing base for adjusting the position of the shell so that the sleeve can be sleeved on the target fine-tuning knob. The position adjustment mechanism is connected to the shell.

2. The automatic violin tuning device according to claim 1, characterized in that: The fixing seat is a spring clamp seat.

3. The automatic violin tuning device according to claim 1, wherein: The position adjustment mechanism includes a slider and a connecting shaft. The slider slides horizontally back and forth with the top surface of the fixed seat. The slider has an axial hole for the connecting shaft to be lifted and lowered and rotated horizontally, and a locking screw hole circumferentially connected to the axial hole. A locking screw is provided in the locking screw hole. The lower end of the connecting shaft is passed through the axial hole, and the upper end is connected to the outer shell.

4. The automatic violin tuning device according to claim 3, characterized in that: The top surface of the fixing seat is provided with a sliding groove in a front-to-back direction, and the bottom of the sliding block is arranged in the sliding groove for horizontal sliding front-to-back.

5. The automatic violin tuning device according to claim 3 or 4, characterized in that: The position adjustment mechanism further includes a universal head connected between the connecting shaft and the housing.

6. The automatic violin tuning device according to claim 1, characterized in that: The control board is provided with a single chip microcomputer, and the single chip microcomputer is electrically connected to the microphone, the display screen and the motor.

7. The automatic violin tuning device according to claim 6, characterized in that: The single chip microcomputer is an ATmega328P single chip microcomputer.

8. The automatic violin tuning device according to claim 6, characterized in that: The microphone is a max4466 sound sensor.

9. The automatic violin tuning device according to claim 6, characterized in that: The display screen is an OLED display screen.

10. The automatic violin tuning device according to claim 6, characterized in that: The motor is an N20 DC reduction motor.

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