Electric piano tuning device

Abstract

The utility model relates to the technical field of piano tuning equipment, and discloses an electric piano tuning device, which comprises a shell, a main shaft and a fixed shaft are respectively and rotatably arranged at two ends of the shell, a speed reducing motor is arranged in the shell, an output end of the speed reducing motor is connected with the main shaft through a gear set, the fixed shaft comprises a first half shaft and a second half shaft, the first half shaft is L-shaped, and the second half shaft is L-shaped. The first end of the first half shaft is rotationally arranged on the shell, and the first end of the second half shaft is arranged at the second end of the first half shaft in a sliding mode. The piano tuning peg adjusting device can replace manual adjustment, can be quickly in butt joint with a piano tuning peg, can rotate forwards or reversely so as to raise or lower pitch, can quickly eliminate idle stroke, and effectively improves the piano tuning effect and efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of piano tuning equipment, in particular to an electric piano tuner. Background Art

[0002] Piano tuning is simply the process of tightening or loosening the strings to a certain pitch, i.e., taking the note a in the note group and the vibration frequency of 440Hz as the standard, each note of the piano is tuned according to the twelve-tone equal temperament method. The twelve-tone equal temperament divides an octave into twelve semitones, each semitone is one hundred cents, and the adjustment needs to be accurate to every cent. When tuning a piano, the tuner usually uses a tuning wrench to tune the piano, which requires the tuner to repeatedly adjust the pitch up or down, and the operation is complicated, making piano tuning very difficult.

[0003] Therefore, a Chinese utility model patent with patent number CN220651622U appeared. This patent discloses a piano tuner, including a housing, a main shaft, a main shaft handwheel, a fixed shaft, a connecting rod and a tuning assembly. The main shaft and the fixed shaft are respectively arranged at both ends of the housing, the inner ends of the main shaft and the fixed shaft are both arranged in the housing, the outer ends of the main shaft and the fixed shaft are both arranged through the housing outside the housing, the outer end faces of the main shaft and the fixed shaft are both provided with inner tapered holes, the main shaft handwheel and the fixed shaft handwheel both pass through the housing and are connected to the inner ends of the main shaft and the fixed shaft respectively, a sleeve assembly is provided on the inner end of the main shaft, the sleeve assembly is connected to the tuning assembly through a connecting rod, and the tuning assembly is arranged inside the housing.

[0004] The above patent has at least the following problems: first, manual adjustment is required, which is rather troublesome; second, in order to improve the tuning accuracy, the speed ratio needs to reach about 1000, and multi-stage speed change needs to be adopted, but there will be a certain amount of gap accumulated between the various mechanisms, generally more than 2mm. When the tuning changes from high to low, there will be a large idle stroke, which will be difficult to compensate for due to the limitation of the tuning component range; third, the pitch of the piano will gradually become lower over time, so the piano tuning generally increases the pitch, that is, it is always rotated in the same direction for adjustment, which will be limited by the range of the tuning component. When the tuning component reaches its limit, a dead point will be generated, which requires manual reset, which is very troublesome. Utility Model Content

[0005] In view of the deficiencies in the prior art, the present invention develops an electric piano tuner, which can replace manual adjustment, can be quickly connected to the piano string pins, can rotate forward or reverse, can raise or lower the pitch, can quickly eliminate backlash, and effectively improves the effect and efficiency of piano tuning.

[0006] The technical solution to the technical problem solved by the utility model is: an electric piano tuner, comprising a shell, a main shaft and a fixed shaft are rotatably provided at both ends of the shell, a reduction motor is provided in the shell, the output end of the reduction motor is connected to the main shaft through a gear set, the fixed shaft comprises a first half shaft and a second half shaft, the first half shaft is "L"-shaped, the first end of the first half shaft is rotatably provided on the shell, and the first end of the second half shaft is slidably provided on the second end of the first half shaft.

[0007] As an optimization, the second half-shaft is L-shaped, with its first end sleeved onto the second end of the first half-shaft. A first fastening bolt is provided on the first end of the second half-shaft, and the inner end of the first fastening bolt passes through the second half-shaft and abuts against the first half-shaft. The L-shaped second half-shaft can be sleeved onto the first half-shaft, allowing the second half-shaft to select a suitable tuning peg within its circular range of motion. The first fastening bolt secures the second half-shaft in place, preventing it from wobbling during tuning peg adjustment.

[0008] As an optimization, the first end of the second half-shaft is slidably mounted on the second end of the first half-shaft via a limit slider. The limit slider is provided with a first fastening bolt, the inner end of which passes through the limit slider and abuts the first half-shaft. The limit slider allows the second half-shaft to slide on the first half-shaft, allowing it to select a suitable tuning peg within its circular range for attachment. The first fastening bolt secures the second half-shaft in position, preventing it from shaking during tuning peg adjustment.

[0009] As an optimization, the second end of the main shaft and the second end of the second semi-shaft are both provided with inner tapered holes, which can be sleeved with the string pegs.

[0010] As an optimization, the housing includes an upper housing and a lower housing, which are connected to the lower housing via self-tapping screws. The main shaft and the first half-shaft are disposed between the upper and lower housings. Both the main shaft and the first half-shaft are provided with shaft stops. The first end of the first half-shaft is disposed on the inner side of the housing, and a second fastening bolt connected to the first end of the first half-shaft is provided on the outer side of the housing. The provision of the upper and lower housings facilitates production and assembly, as well as later disassembly and maintenance.

[0011] As an optimization, a controller is further provided within the housing, a control panel is provided on the housing, and control buttons are provided on the control panel. The input of the controller is connected to the control panel, and the output of the controller is connected to the input of the reduction motor. By providing the controller, control panel, and control buttons, the reduction motor can be started and the speed and direction of the reduction motor can be adjusted.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By providing a housing, a main shaft, a fixed shaft, and a reduction motor can be installed; by providing a reduction motor, a gear set, and a main shaft, the tuning peg can be adjusted directly instead of manually, and the reduction motor can rotate forward or reverse, thereby rotating the tuning peg through the main shaft to raise or lower the pitch, and can quickly eliminate backlash; by providing a fixed shaft, the main shaft can be matched to fix the entirety to the piano tuning peg, thereby enabling the main shaft to adjust the tuning peg; by providing a first semi-shaft and a second semi-shaft, the first semi-shaft can drive the second semi-shaft to rotate around the first end of the first semi-shaft, and the second semi-shaft can slide on the second end of the first semi-shaft, so that the second semi-shaft can select a suitable tuning peg within its range of motion for fixation, thereby expanding the adaptability range of the fixed shaft. The utility model can replace manual adjustment, can be quickly connected to the piano tuning peg, and can rotate forward or reverse, can raise or lower the pitch, can quickly eliminate backlash, and effectively improves the effect and efficiency of piano tuning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present utility model.

[0015] Figure 2 This is the front view of the first embodiment of the utility model.

[0016] Figure 3 Schematic diagram of the second half shaft in the second embodiment of the present invention.

[0017] In the figure: 1. Housing; 2. Spindle; 3. Fixed shaft; 4. Reducer motor; 5. Gear set; 6. Inner taper hole; 7. Shaft stopper; 8. Controller; 9. Control panel; 10. Control buttons;

[0018] 11. Upper shell; 12. Lower shell;

[0019] 31. First half-shaft; 32. Second half-shaft; 33. First fastening bolt; 34. Limiting slider. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of this solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0021] Example 1

[0022] Figure 1 and Figure 2 An embodiment of the present invention is as follows: Figure 1 and Figure 2As shown, an electric piano tuner includes a shell 1, with a main shaft 2 and a fixed shaft 3 rotatably provided at both ends of the shell 1 respectively. A reduction motor 4 is provided in the shell 1, and the output end of the reduction motor 4 is connected to the main shaft 2 through a gear set 5. The fixed shaft 3 includes a first half shaft 31 and a second half shaft 32. The first half shaft 31 is "L"-shaped, and the first end of the first half shaft 31 is rotatably provided on the shell 1, the second end of the first half shaft 31 is provided on the outside of the shell 1, and the first end of the second half shaft 32 is slidably provided on the second end of the first half shaft 31.

[0023] By setting up the shell 1, the main shaft 2, the fixed shaft 3 and the reduction motor 4 can be installed; by setting up the reduction motor 4, the gear set 5 and the main shaft 2, the tuning peg can be directly adjusted instead of manually; by setting up the fixed shaft 3, the main shaft 2 can be matched with the main shaft 2 to fix the whole on the piano tuning peg, so that the main shaft 2 can adjust the tuning peg; by setting up the first half shaft 31 and the second half shaft 32, the first half shaft 31 can drive the second half shaft 32 to rotate around the first end of the first half shaft 31, and the second half shaft 32 can slide on the second end of the first half shaft 31, so that the second half shaft 32 can select a suitable tuning peg within its range of motion for fixation, thereby expanding the adaptation range of the fixed shaft 3.

[0024] like Figure 1 As shown, the second half-shaft 32 is L-shaped, with the first end of the second half-shaft 32 sleeved onto the second end of the first half-shaft 31. A first fastening bolt 33 is provided on the first end of the second half-shaft 32. The inner end of the first fastening bolt 33 passes through the second half-shaft 32 and abuts against the first half-shaft 31. The L-shaped second half-shaft 32 can be sleeved onto the first half-shaft 31, allowing the second half-shaft 32 to be secured to a suitable tuning peg within its annular range of motion. The first fastening bolt 33 also secures the second half-shaft 32, preventing it from shaking during tuning peg adjustment.

[0025] like Figure 1 As shown, the second end of the main shaft 2 and the second end of the second semi-shaft 32 are both provided with an inner tapered hole 6. The inner tapered hole 6 is provided so as to be sleeved with the string peg.

[0026] like Figure 1 and Figure 2 As shown, the housing 1 includes an upper housing 11 and a lower housing 12. The upper housing 11 is connected to the lower housing 12 by self-tapping screws. The main shaft 2 and the first half-shaft 31 are disposed between the upper housing 11 and the lower housing 12. The main shaft 2 and the first half-shaft 31 are each provided with a shaft stop 7. The shaft stop 7 is disposed on the inner side of the housing 1 and prevents the main shaft 2 and the first half-shaft 31 from shaking in the axial direction. The first end of the first half-shaft 31 is disposed on the inner side of the housing 1, and a second fastening bolt 35 connected to the first end of the first half-shaft 31 is disposed on the outer side of the housing 1. The provision of the upper housing 11 and the lower housing 12 facilitates production and assembly, as well as later disassembly and maintenance.

[0027] like Figure 1 and Figure 2 As shown, a controller 8 is further provided in the housing 1, a control panel 9 is provided on the housing 1, and a plurality of control buttons 10 are provided on the control panel 9. The input end of the controller 8 is connected to the control panel 9, and the output end of the controller 8 is connected to the input end of the reduction motor 4. By providing the controller 8, the control panel 9 and the control buttons 10, the reduction motor 4 can be started and the speed and direction of the reduction motor 4 can be adjusted.

[0028] Figure 3 This is another embodiment of the present invention, differing from the first embodiment in that the second half-shaft 32 is rod-shaped, with the first end of the second half-shaft 32 slidingly mounted on the second end of the first half-shaft 31 via a limiting slider 34. A first fastening bolt 33 is provided on the limiting slider 34, the inner end of which passes through the limiting slider 34 and abuts the first half-shaft 31. The provision of the limiting slider 34 enables the second half-shaft 32 to slide on the first half-shaft 31, allowing the second half-shaft 32 to select a suitable tuning peg within its circular range of motion for attachment. The provision of the first fastening bolt 33 secures the position of the second half-shaft 32, preventing it from shaking during tuning peg adjustment.

[0029] When in use, the first fastening bolt 33 and the second fastening bolt 35 are loosened first, so that the first half shaft 31 can rotate around the first end, and the second half shaft 32 can slide on the second end of the first half shaft 31, so that a suitable tuning pin can be easily selected to connect with the fixed shaft 3; the tuner puts the main shaft 2 on the tuning pin to be tuned, and puts the second half shaft 32 on the appropriate tuning pin, and then tightens the first fastening bolt 33 and the second fastening bolt 35 to lock the fixed shaft 3 and complete the connection with the piano tuning pin; the tuner can start the reduction by controlling the button 10 The speed motor 4 includes a speed reducer and a stepper motor. When the stepper motor performs stepping motion, it rotates 1.8 degrees per step, and 200 steps make one revolution. The speed reducer has a reduction ratio of 1000. The tuner can adjust the number of revolutions of the stepper motor through the control button 10, thereby adjusting the rotation angle and number of revolutions of the main shaft 2 to achieve precise tuning. The rotation direction of the stepper motor can also be selected to rotate the main shaft 2 forward or reverse, thereby raising or lowering the pitch. The speed of the stepper motor can also be adjusted through the control button 10 to quickly eliminate backlash. The utility model can replace manual adjustment, can be quickly connected to the piano string pins, and can also rotate forward or reverse, raise or lower the pitch, and can quickly eliminate backlash, effectively improving the effect and efficiency of piano tuning.

[0030] The descriptions of the orientation or relative position relationship of the structure in the present invention, such as the orientation or relative position relationship indicated by "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

Claims

1. An electric piano tuner, comprising a housing (1), characterized in that: A main shaft (2) and a fixed shaft (3) are rotatably provided at both ends of a housing (1), a reduction motor (4) is provided in the housing (1), an output end of the reduction motor (4) is connected to the main shaft (2) via a gear set (5), and the fixed shaft (3) comprises a first half shaft (31) and a second half shaft (32), the first half shaft (31) being L-shaped, a first end of the first half shaft (31) being rotatably provided on the housing (1), and a first end of the second half shaft (32) being slidably provided on the second end of the first half shaft (31).

2. The electric piano tuner according to claim 1, wherein: The second half shaft (32) is L-shaped. The first end of the second half shaft (32) is sleeved on the second end of the first half shaft (31). A first fastening bolt (33) is provided on the first end of the second half shaft (32). The inner end of the first fastening bolt (33) passes through the second half shaft (32) and abuts against the first half shaft (31).

3. The electric piano tuner according to claim 1, wherein: The first end of the second semi-shaft (32) is slidably arranged on the second end of the first semi-shaft (31) through a limiting slider (34); a first fastening bolt (33) is provided on the limiting slider (34); an inner end of the first fastening bolt (33) passes through the limiting slider (34) and abuts against the first semi-shaft (31).

4. The electric piano tuner according to claim 2 or 3, characterized in that: An inner tapered hole (6) is provided on the second end of the main shaft (2) and the second end of the second half shaft (32).

5. The electric piano tuner according to claim 4, wherein: The housing (1) comprises an upper housing (11) and a lower housing (12), wherein the upper housing (11) is connected to the lower housing (12) via self-tapping screws, the main shaft (2) and the first half shaft (31) are arranged between the upper housing (11) and the lower housing (12), the main shaft (2) and the first half shaft (31) are both provided with shaft stops (7), the first end of the first half shaft (31) is arranged on the inner side of the housing (1), and the outer side of the housing (1) is provided with a second fastening bolt (35) connected to the first end of the first half shaft (31).

6. The electric piano tuner according to claim 5, wherein: A controller (8) is further provided in the housing (1), a control panel (9) is provided on the housing (1), a control button (10) is provided on the control panel (9), an input end of the controller (8) is connected to the control panel (9), and an output end of the controller (8) is connected to an input end of the reduction motor (4).

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