Novel piano tuning wrench

Abstract

The utility model discloses a novel piano tuning wrench which comprises a handle, a torsion arm and a wrench head, a bent pipe is vertically arranged at the upper end of the handle, the handle is a hollow shell, a fastening nut is rotatably arranged in front of the torsion arm, an inserting column is arranged in front of the torsion arm and located in the fastening nut, a driven bevel gear is arranged behind the torsion arm and extends into the handle, and a wrench opening is formed in front of the wrench head. A connecting pipe is arranged behind the wrench head, a rotary switch with gears is arranged at the lower end of the handle, a long touch switch is arranged on the handle, a controller and a battery are arranged in the handle, the controller is electrically connected with the battery, the rotary switch and the long touch switch through wires, and a driving mechanism is arranged on the upper side in the handle. The utility model has the advantages that the manual mode and the electric mode can be switched for use, the applicability of the utility model is improved, and the efficiency of the tuning work is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of piano tuning wrenches, and specifically refers to a new type of piano tuning wrench. Background Technique

[0002] A piano tuning wrench is an essential tool in the piano tuning process. It is mainly used to adjust the tension of the piano strings to achieve the purpose of tuning. It mainly changes the tension of the strings by rotating the tuning pins, thereby adjusting the pitch of the strings.

[0003] The traditional tuning wrench consists of a wooden handle, an iron handle and a tooth head. The handle is the part where the tuner holds the wrench. The iron handle is usually placed inside the handle and is the main stress part of the wrench during tuning. The tooth head is the part that directly contacts the tuning pin. Its design should ensure that it can firmly bite the tuning pin and transmit the rotational force. During the use of the traditional tuning wrench, if the operation is improper or the force is not well controlled, excessive force or improper operation may also cause the tuning pin to bend, and the tuning efficiency is relatively low. When performing fine tuning, the tuner needs to have high skills and experience to accurately control the force and rotation speed of the wrench, so as to achieve the ideal tuning effect. Content of the Utility Model

[0004] The utility model provides a new type of piano tuning wrench to solve the problems that in the process of using the above-mentioned traditional tuning wrench, if the operation is improper or the force is not well controlled, excessive force or improper operation may also cause the tuning pin to bend, and the tuning efficiency is relatively low. When performing fine tuning, the tuner needs to have high skills and experience, etc.

[0005] To solve the above technical problems, the technical solution provided by the utility model is: a new type of piano tuning wrench, including a handle, a torsion arm, and a wrench head. A bent pipe is vertically provided at the upper end of the handle. The handle is a hollow shell. The torsion arm is rotatably connected to the bent pipe. A fastening nut is rotatably provided in front of the torsion arm. A plug post is provided inside the fastening nut in front of the torsion arm. A driven bevel gear extends from the back of the torsion arm into the handle. A wrench opening is provided in front of the wrench head. A connecting pipe is provided behind the wrench head. The connecting pipe is threadedly connected to the fastening nut. A rotary switch with gears is provided at the lower end of the handle. A long-touch switch is provided on the handle. A controller and a battery are provided inside the handle. The controller is electrically connected to the battery, the rotary switch, and the long-touch switch through wires. A driving mechanism is provided on the upper side inside the handle.

[0006] Among them, the rotary switch has three gears, namely, closing the circuit, manual gear, and electric gear. When the long-touch switch is pressed, the motor starts, and when it is released, the motor stops. The motor is a reduction motor and automatically resets to the initial state after the circuit is closed. At this time, the through hole is aligned with the card hole position.

[0007] As an improvement, scale lines are provided circumferentially on the outer side surface of the front end of the wrench head.

[0008] As an improvement, through holes are symmetrically provided on the torsion arm, a micro electric push rod is provided in the through hole, clamping holes are symmetrically provided on the inner side of the bent pipe, and the micro electric push rod can extend into the clamping holes.

[0009] As an improvement, a limiting groove is formed in the connecting pipe, limiting posts are symmetrically provided on the inserting post, and the limiting posts are located in the limiting groove.

[0010] As an improvement, the driving mechanism includes a motor fixed in the handle, the output shaft of the motor is connected with a rotating shaft, a driving bevel gear meshing with the driven bevel gear is arranged at the upper end of the rotating shaft, a bearing is arranged in the handle, the rotating shaft is rotationally connected with the bearing, and the motor is electrically connected with the controller through a wire.

[0011] The advantages of the utility model are as follows: it has two modes of manual and electric that can be switched for use, improving the applicability of the utility model. The tuning wrench in the electric mode can automatically tighten or loosen screws and nuts, greatly reducing the time of manual operation and improving the efficiency of tuning work. The adjustment process of the electric wrench is relatively stable, the adjustment progress is controllable, avoiding the accuracy fluctuation caused by human factors of the traditional wrench, and the operation of the electric mode is relatively simple, and beginners can more easily master the tuning skills. Description of the Drawings

[0012] Figure 1 is the structural schematic diagram of the utility model.

[0013] Figure 2 is the exploded structural schematic diagram of the utility model.

[0014] Figure 3 is the cross-sectional view of the utility model.

[0015] As shown in the figure: 1. Handle; 2. Torsion arm; 3. Wrench head; 4. Bent pipe; 5. Fastening nut; 6. Inserting post; 7. Driven bevel gear; 8. Wrench opening; 9. Connecting pipe; 10. Rotary switch; 11. Long-touch switch; 110. Controller; 111. Battery; 12. Scale line; 13. Through hole; 14. Micro electric push rod; 15. Clamping hole; 16. Limiting groove; 17. Limiting post; 18. Motor; 19. Rotating shaft; 20. Driving bevel gear; 21. Bearing. Detailed Embodiment

[0016] The following further describes the utility model in detail with reference to the drawings.

[0017] Combined with the attached Figure 1 、 Figure 2 、 Figure 3, a new type of piano tuning wrench, comprising a handle 1, a torsion arm 2, and a wrench head 3. A bent pipe 4 is vertically provided at the upper end of the handle 1. The handle 1 is a hollow shell. The torsion arm 2 is rotatably connected to the bent pipe 4. A fastening nut 5 is rotatably provided on the front surface of the torsion arm 2. A plug post 6 is provided inside the fastening nut 5 on the front surface of the torsion arm 2. A driven bevel gear 7 is provided at the rear of the torsion arm 2 and extends into the handle 1. A wrench opening 8 is provided on the front surface of the wrench head 3. A scale line 12 is provided along the circumferential direction on the outer side surface of the front end of the wrench head 3. A connecting pipe 9 is provided at the rear of the wrench head 3. The connecting pipe 9 is threadedly connected to the fastening nut 5. A limiting groove 16 is opened on the connecting pipe 9. Limiting posts 17 are symmetrically provided on the plug post 6. The limiting posts 17 are located in the limiting groove 16. The limiting posts 17 and the limiting groove 16 limit and fix the rotation of the wrench head 3. A rotary switch 10 with gears is provided at the lower end of the handle 1. A long-touch switch 11 is provided on the handle 1. A controller 110 and a battery 111 are provided inside the handle 1. The controller 110 is electrically connected to the battery 111, the rotary switch 10, and the long-touch switch 11 through wires respectively. A driving mechanism is provided on the upper side inside the handle 1.

[0018] Among them, the rotary switch 10 has three gears, namely, closing the circuit, manual gear, and electric gear. When the long-touch switch 11 is pressed, the motor 18 starts, and when released, the motor 18 stops. The motor 18 is a reduction motor 18, and after the circuit is closed, the motor 18 automatically resets to the initial state. At this time, the through hole 13 is aligned with the card hole 15. The present utility model has two working modes, with strong operability. The electric gear performs automatic tuning through the driving mechanism, and the operation is simple and convenient. In the driving structure, the small-sized driving bevel gear 20 drives the large-sized driven bevel gear 7 to further reduce the rotation speed of the torsion arm 2 and increase the torque of the reduction motor 18, realizing the small-amplitude and slow fine-tuning operation of the wrench head 3.

[0019] Embodiment 1: Through holes 13 are symmetrically provided on the torsion arm 2. A micro electric push rod 14 is provided inside the through holes 13. Card holes 15 are symmetrically provided on the inner side of the bent pipe 4. The micro electric push rod 14 can extend into the card holes 15. When the rotary switch 10 is switched to the manual gear, the micro electric push rod 14 starts to extend into the card holes 15. At this time, the torsion arm 2 cannot rotate, and the manual rotation tuning operation can be performed by holding the handle 1.

[0020] Embodiment Case 2: The driving mechanism includes a motor 18 fixed inside the handle 1. The output shaft of the motor 18 is connected to a rotating shaft 19. A driving bevel gear 20 meshing with the driven bevel gear 7 is provided at the upper end of the rotating shaft 19. A bearing 21 is provided inside the handle 1, and the rotating shaft 19 is rotatably connected to the bearing 21. The motor 18 is electrically connected to the controller 110 through a wire. When the rotary switch 10 is switched to the electric gear position, the motor 18 is started by pressing the long-touch switch 11. The rotating shaft 19 drives the driving bevel gear 20 to rotate and mesh with the driven bevel gear 7, so that the wrench head 3 slowly rotates. When the long-touch switch 11 is released, the motor 18 stops instantly.

[0021] When the present utility model is specifically implemented, the following preparations are made: Connect the wrench head corresponding to the tuning peg to the torsion arm. Thread the fastening nut onto the connecting pipe. Insert the plug post into the connecting pipe. Align the limiting post and insert it into the limiting groove. The wrench head is fixedly connected to the torsion arm. Manual adjustment: Switch the rotary switch to the manual gear position. The micro electric push rod starts to extend into the card hole to limit the rotation of the torsion arm. The wrench head is directly rotated for tuning by driving the handle. Automatic adjustment: Switch the rotary switch to the electric gear position. The micro electric push rod contracts into the through hole. Hold the long-touch switch and start the motor through the controller. The rotating shaft and the driving bevel gear rotate and mesh with the driven bevel gear to drive the torsion arm and the wrench head to rotate. Observe the scale line until the wrench head rotates slightly and then stops.

[0022] The above describes the present utility model and its implementation manners. Such description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present utility model, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative work without departing from the creative concept of the present utility model, they shall fall within the protection scope of the present utility model.

Claims

1. A novel piano tuning wrench, comprising a handle (1), a twist arm (2), and a wrench head (3), characterized in that: A curved tube (4) is vertically arranged at the upper end of the handle (1); the handle (1) is a hollow shell; the torsion arm (2) is rotatably connected to the curved tube (4); a fastening nut (5) is rotatably arranged at the front of the torsion arm (2); a plug post (6) is arranged at the front of the torsion arm (2) and inside the fastening nut (5); a driven bevel gear (7) is arranged at the rear of the torsion arm (2) and extends into the handle (1); a wrench opening (8) is arranged at the front of the wrench head (3); and a connecting rod (6) is arranged at the rear of the wrench head (3). The connecting tube (9) is threadedly connected to the fastening nut (5); a rotary switch (10) with a gear position is provided at the lower end of the handle (1); a long-touch switch (11) is provided on the handle (1); a controller (110) and a battery (111) are provided inside the handle (1); the controller (110) is electrically connected to the battery (111), the rotary switch (10), and the long-touch switch (11) through wires; and a driving mechanism is provided on the upper inner side of the handle (1).

2. A novel piano tuning wrench according to claim 1, characterized in that: The outer side surface of the front end of the spanner head (3) is provided with scale lines (12) along the circumferential direction.

3. A novel piano tuning wrench according to claim 1, characterized in that: The torsion arm (2) is symmetrically provided with a through hole (13), a micro electric push rod (14) is arranged in the through hole (13), and a clamping hole (15) is symmetrically provided on the inner side of the bent tube (4), and the micro electric push rod (14) can extend into the clamping hole (15).

4. A novel piano tuning wrench according to claim 1, characterized in that: The connecting pipe (9) is provided with a limiting groove (16), and the inserting column (6) is symmetrically provided with limiting columns (17), and the limiting columns (17) are located in the limiting groove (16).

5. The novel piano tuning wrench according to claim 1 is characterized in that: The driving mechanism comprises a motor (18) fixed in the handle (1); the output shaft of the motor (18) is connected to a rotating shaft (19); the upper end of the rotating shaft (19) is provided with a driving bevel gear (20) meshing with a driven bevel gear (7); a bearing (21) is provided in the handle (1); the rotating shaft (19) is rotatably connected to the bearing (21); and the motor (18) is electrically connected to a controller (110) via a wire.

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