Piano keystroke control device

Abstract

The invention relates to the technical field of piano knocking equipment, in particular to a piano keystroke control device which comprises a movable workbench, the movable workbench is of an upper-layer structure and a lower-layer structure, a controller is installed on the lower layer, a lifting workbench is installed on the upper layer, and the lifting workbench is driven by a lifting assembly to conduct lifting operation. A linkage assembly is installed on the lifting workbench, one end of the linkage assembly is driven by a servo motor, a hammer is installed at the other end of the linkage assembly, the servo motor is driven through rotation, and then the linkage assembly drives the hammer to conduct knocking action. In the piano keystroke control device, the high-precision motion control capability of the servo motor set is combined, and the keystroke strength, the keystroke period and the keystroke frequency can be accurately controlled. The multi-degree-of-freedom mechanical arm not only meets diversified playing requirements, but also can be used as a uniformly-controlled'mechanical arm 'in a piano experiment, accurately tests defects or durability of piano parts, and is used for recording audios to research piano sound attenuation under different strengths and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of piano striking equipment, in particular to a piano key striking control device. Background Art

[0002] Precise control of keystroke force is crucial in piano performance, related research, and production. Designing instruments for this purpose has become a pressing challenge within the industry. However, no instrument currently available on the market can directly control piano keystroke force.

[0003] Currently, there are many defects in the instruments on the market related to controlling the force of playing piano keys. For example, the vibrato machine, whose principle is to mechanically imitate the action of human fingers playing the piano, is characterized by a rotating pivot cantilever keystroke mechanism, which replaces human fingers playing the piano by moving the vibrator head up and down. The vibrato machine is mainly used to discover and solve manufacturing defects in the piano production process to improve production quality and efficiency. However, this instrument is expensive and bulky. It is usually only suitable for piano manufacturers. In daily use scenarios, it is less necessary and difficult to carry and move due to its size. In addition, there is a handheld keystroke assist tool on the market. Although it is easy to carry, it cannot accurately control the force and is usually only used for heavy strikes after tuning. The function is very simple and it is difficult to meet the diverse needs of use. At the same time, due to the difference in height of each piano, the existing related instruments also lack effective designs that adapt to different piano heights.

[0004] Compared with the multifunctional goals of the present invention, such as precise control of piano keystroke force, an existing piano key playing force adjustment device with patent number CN201811584878.9 also has obvious shortcomings. This device mainly adjusts the key playing force by setting a counterweight box on the piano key, and using a counterweight block, a ball screw and a series of gear transmission structures to adjust the key playing force. It solves the problem that the existing piano cannot adjust the key playing force as a whole. However, it only focuses on the single function of force adjustment, and cannot achieve precise control of the keystroke cycle and the number of keystrokes. It is also difficult to uniformly control the keystroke force in piano experiments to test component defects or durability, and it cannot be used to record audio to study sound attenuation, etc. In addition, the device is installed on the keys, which may affect the normal playing operation of the keys, and no relevant design considerations are made in terms of convenient movement and adaptation to different piano heights. Summary of the Invention

[0005] The purpose of the present invention is to provide a piano keystroke control device to solve the problem that the method proposed in the above background technology can achieve precise control of the keystroke cycle and the number of keystrokes, and it is difficult to uniformly control the keystroke force in piano experiments to test component defects or durability, and it cannot be used to record audio to study sound attenuation, etc.

[0006] To achieve the above-mentioned objectives, the present invention provides a piano keystroke control device, comprising a movable workbench, wherein the movable workbench is a two-layer structure, wherein a controller is installed on the lower layer, and a lifting workbench is installed on the upper layer. The lifting workbench is driven by a lifting assembly to perform a lifting operation, and a linkage assembly is installed on the lifting workbench. One end of the linkage assembly is driven by a servo motor, and a hammer is installed on the other end of the linkage assembly. The servo motor is driven by rotation, and then drives the hammer to perform a striking action through the linkage assembly.

[0007] This setup utilizes a layered design, with a movable worktable serving as the base support. The upper level, a lifting platform, can be flexibly adjusted in height via a lifting assembly to accommodate the varying height requirements of different pianos. A linkage assembly connects a servo motor at one end and hammers at the other. The servo motor's rotational power is transmitted through the linkage assembly, ultimately driving the hammers to perform the strike. These components work together to create a complete keystroke control system.

[0008] As a preferred solution of the present invention, rollers are installed at the bottom of the movable workbench, brakes are installed on the rollers, and an armrest is installed on one side of the top of the movable workbench.

[0009] This setup utilizes rollers installed at the bottom of the movable workbench, leveraging their rolling properties to easily move the device across a flat surface. Brakes are provided to stabilize the device once it's moved to a designated position, preventing it from sliding. A handrail on one side of the top allows for easier movement, ensuring ergonomic operation.

[0010] As a preferred solution of the present invention, a button switch is installed on one side of the movable workbench, and the button switch is electrically connected to a controller, and the controller controls the lifting assembly and the servo motor to work.

[0011] This setup uses pushbutton switches as the human-machine interface, electrically connected to the controller. By operating these pushbutton switches, the operator sends control commands to the controller. Upon receiving these commands, the controller precisely controls the operating states of the lifting components and servo motors according to pre-programmed logic, thereby enabling control of the device's movements.

[0012] As a preferred solution of the present invention, the lifting assembly includes a shell, a vertical screw rod is installed inside the shell, a screw rod slider is installed on the screw rod, a lifting seat is installed outside the screw rod slider, and the lifting workbench is fixed on the lifting seat.

[0013] This lifting assembly utilizes the threaded drive mechanism of a lead screw and a lead slider. As the lead screw rotates, the lead slider moves up and down along its axis. A lifting seat, mounted on the outside of the lead slider, is fixedly connected to the lifting platform, driving the platform to rise and fall synchronously.

[0014] As a preferred solution of the present invention, a hand wheel is installed on the top of the lifting assembly, the hand wheel is connected to the upper end of the screw rod, and the bottom of the lifting assembly is fixed to the movable workbench by bolts.

[0015] This setup installs a handwheel on the top of the lift assembly and connects it to the upper end of the lead screw. The operator manually turns the handwheel, rotating the lead screw and thereby raising or lowering the lift table. The bottom of the lift assembly is bolted to the movable table, ensuring a secure installation.

[0016] As a preferred embodiment of the present invention, the servo motor drive shaft is equipped with a drive rod, the linkage assembly includes a connecting rod, the end of the drive rod is connected to a rocker arm through the connecting rod, the outer end of the rocker arm is equipped with a knocking rod, and the end of the knocking rod is connected to the hammer.

[0017] This setting sets up a drive rod mounted on the servo motor's drive shaft, which moves in a circular motion. The end of the drive rod is connected to a rocker arm via a connecting rod. When the drive rod rotates, the connecting rod pushes the rocker arm to swing around its axis. A striking rod, mounted on the outer end of the rocker arm, moves up and down as the rocker swings, ultimately driving the hammer to strike.

[0018] As a preferred solution of the present invention, one end of the connecting rod is rotatably connected to the driving rod, the other end of the connecting rod is rotatably connected to the middle part of the rocker arm, and one end of the rocker arm is rotatably connected to the lifting workbench through a rotating shaft.

[0019] This setup features a connecting rod with a pivoting connection to the drive rod at one end and to the center of the pendulum rod at the other. This connection allows the drive rod's circular motion to be smoothly transmitted to the pendulum rod, and during this process, the motion is appropriately converted and amplified based on the length and angle relationships of the individual rods. One end of the pendulum rod is pivotally connected to the lifting platform via a rotating shaft, providing a stable support point for its swing.

[0020] As a preferred solution of the present invention, the knocking rod is vertically arranged, the upper end of the hammer is hinged to the lower end of the knocking rod, and the lower end of the hammer is an arc-shaped surface structure.

[0021] This setting positions the hammer lever vertically, allowing the hammer to strike vertically, meeting the practical requirements of piano keystrokes. The hammer's upper end is hinged to the lower end of the lever, ensuring the hammer can flexibly adjust its angle to the key's reaction force during the strike, ensuring optimal contact. The curved surface at the lower end of the hammer increases the contact area with the key, distributing the striking force more evenly and minimizing damage to the key.

[0022] As a preferred solution of the present invention, the controller further includes a communication interface, which supports Bluetooth, Wi-Fi or USB communication protocols and is used for data transmission and remote control with external devices.

[0023] This setup equips the controller with a communication interface that supports Bluetooth, Wi-Fi, or USB protocols. Through these communication interfaces, the device can establish a data connection with external devices (such as computers and tablets). The external device can send various control commands to the controller, such as keystroke force, frequency, and number of times. At the same time, the device can also feedback its operating status and sensor data to the external device.

[0024] As a preferred solution of the present invention, each rotating connection of the linkage assembly is installed with a bearing or a self-lubricating bushing to reduce friction resistance and wear, and improve transmission efficiency and service life.

[0025] This feature installs bearings or self-lubricating bushings at each rotating joint in the linkage assembly. Bearings reduce friction between rotating parts, lowering frictional resistance and enabling smoother rotation. Self-lubricating bushings, while maintaining minimal wear, provide continuous lubrication for rotating parts, reducing wear. The use of these two components effectively reduces energy loss during the linkage assembly's motion and improves transmission efficiency.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The controller in this piano keystroke control device allows custom programming of movement speed, time, angle, and frequency. Combined with the servo motor package's high-precision motion control capabilities, it precisely controls keystroke force, cycle, and frequency. This not only meets diverse performance needs but can also serve as a uniformly controlled "robot arm" in piano experiments, accurately testing for defects and durability of piano components, and recording audio to study piano sound attenuation under varying forces. This fills a gap in the market for multifunctional, precise control.

[0028] 2. The piano keystroke control device features rollers and brakes on the bottom of the movable workbench, combined with a top armrest, for easy movement and securement. Push-button switches enable simple control of the device's movements, such as slow-motion forward and reverse rotation, and speed control. Furthermore, the controller is equipped with communication interfaces supporting Bluetooth, Wi-Fi, or USB protocols, enabling data transmission and remote control with external devices, further enhancing operational convenience.

[0029] 3. In the piano keystroke control device, the lifting workbench is height-adjusted by a lifting assembly consisting of a screw rod, a screw rod slider, etc., and is operated with a hand-cranked wheel. It can adapt to pianos of different heights and can be used in both white and black key areas. This solves the problem that existing instruments cannot adapt to pianos of different heights and expands the application range of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 Schematic diagram of the structure of the movable workbench in the present invention;

[0032] Figure 3 Schematic diagram of the structure of the controller in the present invention;

[0033] Figure 4 Schematic diagram of the structure of the motor and hammer connection tool in the present invention;

[0034] The meaning of each number in the figure is:

[0035] 1. Movable workbench; 11. Roller; 12. Armrest; 2. Controller; 3. Lifting assembly; 4. Servo motor; 41. Drive rod; 5. Hammer; 6. Lifting workbench; 7. Push button switch; 8. Linkage assembly; 81. Connecting rod; 82. Rocker arm; 83. Knocking rod; 84. Rotating shaft. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] The present invention provides a piano keystroke control device, such as Figure 1As shown, it includes a movable workbench 1, which is a two-layer structure. The lower layer is equipped with a controller 2, and the upper layer is equipped with a lifting workbench 6. The lifting workbench 6 is driven by a lifting component 3 to perform a lifting operation. A linkage component 8 is installed on the lifting workbench 6. One end of the linkage component 8 is driven by a servo motor 4, and a hammer 5 is installed on the other end of the linkage component 8. The servo motor 4 is driven by rotation, and then drives the hammer 5 to perform a knocking action through the linkage component 8.

[0038] The device adopts a layered structural design, with a movable workbench 1 as the basic support. It has a two-layer structure, with a controller 2 installed on the lower layer and a lifting workbench 6 on the upper layer. The lifting workbench 6 can flexibly adjust its height through the lifting component 3 to adapt to the height requirements of different pianos. A linkage component 8 is installed on the lifting workbench 6. One end of the linkage component 8 is connected to the servo motor 4, and the other end is connected to the hammer 5. The power generated by the rotation of the servo motor 4 is transmitted through the linkage component 8, and finally drives the hammer 5 to complete the striking action. The various parts work together to build a complete keystroke control system. The layered design makes the functional division of the device clear, which is convenient for installation, maintenance and debugging. The height-adjustable lifting workbench 6 greatly improves the versatility of the device and can adapt to pianos of various types and sizes. The servo motor 4 drives the linkage component 8 to drive the hammer 5 to strike, laying the foundation for precise control of the keystroke action, which can meet the diverse experimental and performance needs.

[0039] In this embodiment, Figure 2 As shown, a roller 11 is installed at the bottom of the movable workbench 1, a brake is installed on the roller 11, and an armrest 12 is installed on one side of the top of the movable workbench 1.

[0040] A roller 11 is installed at the bottom of the movable workbench 1, and the rolling characteristics of the roller 11 are used to realize easy movement of the device on a plane. The brake installed on the roller 11 can stabilize and fix the device after it is moved to the specified position to prevent accidental sliding. An armrest 12 is installed on one side of the top of the movable workbench 1 to facilitate the operator to apply force when moving the device. It conforms to ergonomic principles and is easy to operate. The combined design of the roller 11 and the brake significantly improves the maneuverability and stability of the device, allowing the operator to easily move the device to different pianos and fix it according to actual needs. The design of the armrest 12 further improves the convenience of operation and reduces the physical exertion of the operator when moving the device. It is particularly suitable for scenarios where the device needs to be moved frequently.

[0041] Specifically, such as Figure 1 、 Figure 3 As shown, a button switch 7 is installed on one side of the movable workbench 1. The button switch 7 is electrically connected to the controller 2. The controller 2 controls the lifting assembly 3 and the servo motor 4 to work.

[0042] The button switch 7 installed on one side of the movable workbench 1 serves as an interface for human-computer interaction and is electrically connected to the controller 2. The operator sends a control instruction to the controller 2 by operating the button switch 7. After receiving the instruction, the controller 2 accurately controls the working state of the lifting component 3 and the servo motor 4 according to the preset program logic, thereby realizing the control of the device movement. The button switch 7 provides a simple and direct operation method that even non-professionals can quickly get started. The centralized control of the lifting component 3 and the servo motor 4 by the controller 2 ensures the coordination and accuracy of the movements of various parts of the device, thereby improving the reliability and stability of the operation.

[0043] Further, such as Figure 1 As shown, the lifting assembly 3 includes a shell, a vertical screw is installed inside the shell, a screw slider is installed on the screw, a lifting seat is installed outside the screw slider, and the lifting workbench 6 is fixed on the lifting seat.

[0044] The lifting assembly 3 includes a housing, a vertical screw is installed inside the housing, a screw slider is installed on the screw, a lifting seat is installed on the outside of the screw slider, and the lifting platform 6 is fixed on the lifting seat. Utilizing the threaded transmission principle of the screw and the screw slider, when the screw rotates, the screw slider will move up and down along the axial direction of the screw, thereby driving the lifting platform 6 to achieve synchronous lifting. Screw transmission has the advantages of high transmission accuracy, strong load capacity, and smooth movement. This design can accurately adjust the height of the lifting platform 6 to adapt to the height requirements of different pianos, and has good stability during the adjustment process, and is not prone to shaking or jamming, ensuring the normal use of the device at different heights.

[0045] Further, such as Figure 1 As shown, a hand wheel is installed on the top of the lifting component 3, the hand wheel is connected to the upper end of the screw rod, and the bottom of the lifting component 3 is fixed to the movable workbench 1 by bolts.

[0046] A hand wheel is installed on the top of the lifting assembly 3, and the hand wheel is connected to the upper end of the screw. The operator manually turns the hand wheel to drive the screw to rotate, thereby realizing the lifting operation of the lifting workbench 6. The bottom of the lifting assembly 3 is fixed to the movable workbench 1 by bolts, ensuring the stable installation of the entire lifting assembly 3. The design of the hand wheel provides a manual operation method for adjusting the height of the lifting workbench 6, without the aid of an external power supply or a complex control system, and the operation is simple and intuitive. The bolt fixing method ensures that the connection between the lifting assembly 3 and the movable workbench 1 is firm and reliable, and the connection will not become loose due to vibration or external force during the movement and use of the device.

[0047] Further, such as Figure 4As shown, the driving shaft of the servo motor 4 is installed with a driving rod 41, and the linkage assembly 8 includes a connecting rod 81. The end of the driving rod 41 is connected to a rocker arm 82 through the connecting rod 81. The outer end of the rocker arm 82 is installed with a knocking rod 83, and the end of the knocking rod 83 is connected to the hammer 5.

[0048] The drive shaft of the servo motor 4 is mounted with a drive rod 41, which performs circular motion driven by the servo motor 4. The end of the drive rod 41 is connected to the rocker arm 82 via a connecting rod 81. When the drive rod 41 rotates, the rocker arm 82 is pushed by the connecting rod 81 to swing around a rotating shaft 84 at one end. The striking rod 83 mounted on the outer end of the rocker arm 82 moves up and down as the rocker arm 82 swings, ultimately driving the hammer 5 to perform a striking action. This multi-rod linkage structural design can efficiently convert the rotational motion of the servo motor 4 into a linear striking motion of the hammer 5. By rationally designing the length and connection method of each rod, the striking force, speed, and stroke of the hammer 5 can be precisely controlled to meet the diverse demands for keystrokes in different experiments and performances.

[0049] Further, such as Figure 4 As shown, one end of the connecting rod 81 is rotatably connected to the driving rod 41 , the other end of the connecting rod 81 is rotatably connected to the middle of the rocker arm 82 , and one end of the rocker arm 82 is rotatably connected to the lifting workbench 6 through the rotating shaft 84 .

[0050] One end of the connecting rod 81 is rotatably connected to the drive rod 41, and the other end is rotatably connected to the middle portion of the rocker arm 82. This connection allows the circular motion of the drive rod 41 to be smoothly transmitted to the rocker arm 82. During this transmission process, the motion can be rationally converted and amplified based on the length and angular relationship of the respective rods. One end of the rocker arm 82 is rotatably connected to the lifting platform 6 via a rotating shaft 84, providing a stable support point for the rocker arm 82's swing. This rotatable connection design reduces frictional resistance during movement and improves transmission efficiency. Furthermore, this structure makes the movement of the linkage assembly 8 more flexible and smooth, effectively preventing jamming or blocking that could affect the normal striking action of the hammer 5, thereby ensuring the stability and reliability of the device's operation.

[0051] Further, such as Figure 4 As shown, the knock rod 83 is vertically arranged, the upper end of the hammer 5 is hinged to the lower end of the knock rod 83, and the lower end of the hammer 5 is an arc-shaped surface structure.

[0052] The striking rod 83 is arranged vertically, so that the hammer 5 can perform a striking action in the vertical direction, which meets the actual needs of piano keystrokes. The upper end of the hammer 5 is hinged to the lower end of the striking rod 83, ensuring that the hammer 5 can flexibly adjust its own angle according to the reaction force of the key during the striking process to better contact the key. The lower end of the hammer 5 has a curved surface structure, which can increase the contact area with the key, make the striking force more evenly distributed, and reduce damage to the key. The vertically arranged striking rod 83 and the hinged hammer 5 improve the accuracy and flexibility of the striking action. The lower end of the hammer 5 with a curved surface structure can not only more effectively transmit the striking force and produce a better keystroke effect, but also protect the keys and extend the service life of the keys, making the device closer to the actual situation when simulating real performance or experimental testing.

[0053] Furthermore, the controller 2 also includes a communication interface, which supports Bluetooth, Wi-Fi or USB communication protocols and is used for data transmission and remote control with external devices.

[0054] The controller 2 is equipped with a communication interface that supports Bluetooth, Wi-Fi or USB communication protocols. Through these communication interfaces, the device can establish a data connection with external devices such as computers, tablets, etc. The external device can send various control instructions to the controller 2, such as keystroke force, frequency, number of times, etc. At the same time, the device can also feed back its own working status, sensor data, etc. to the external device. The setting of the communication interface greatly expands the control method and application scenarios of the device. The operator can remotely control the device through an external device at a location far away from the device, which improves the convenience and flexibility of operation. In addition, through data interaction with external devices, more complex experimental control and data analysis functions can also be achieved to meet the diverse needs of different users.

[0055] Furthermore, each rotating connection of the linkage assembly 8 is installed with a bearing or a self-lubricating bushing to reduce friction resistance and wear, thereby improving transmission efficiency and service life.

[0056] Bearings or self-lubricating bushings are installed at each rotating connection of the linkage assembly 8. The bearings can reduce the friction coefficient between the rotating parts, reduce frictional resistance, and make the rotation smoother. The self-lubricating bushing provides continuous lubrication for the rotating parts while its own wear is relatively small, reducing wear. The application of these two components can effectively reduce the energy loss of the linkage assembly 8 during movement and improve transmission efficiency. Reducing frictional resistance and wear not only improves transmission efficiency, allowing the power of the servo motor 4 to be more effectively transmitted to the hammer 5, achieving more precise keystroke control, but also significantly extends the service life of the device. This means that the device can maintain stable performance during long-term use, reduce the frequency of maintenance and replacement of parts, and reduce the cost of use.

[0057] This piano keystroke control device is based on the principle of combining mechanical transmission with electronic control. The device is conveniently moved and positioned using a movable workbench 1, and the height of the lifting workbench 6 is adjusted using a screw-driven lifting assembly 3 to accommodate different pianos. The servo motor 4 serves as the power source, and its rotational motion is converted into the linear striking motion of the hammer 5 via a linkage assembly 8 consisting of a drive rod 41, a connecting rod 81, and a rocker arm 82. The controller 2, serving as the core control unit, receives commands from a pushbutton switch 7 or external devices to precisely control the operating states of the lifting assembly 3 and servo motor 4. Simultaneously, the linkage assembly 8 rotates the bearings or self-lubricating bushings at the joints to reduce friction, ensuring transmission efficiency and device life.

[0058] To use the piano keystroke control device of the present invention, the operator first grasps the armrest 12 on the top of the movable workbench 1 and pushes the device, utilizing the rolling characteristics of the bottom rollers 11 to move the device to the desired piano. Once the device reaches the desired location, the operator operates the brakes on the rollers 11 to securely fix the device, preventing it from sliding during subsequent operation.

[0059] If the current piano height does not match the initial height of the device, the operator can manually turn the hand wheel on the top of the lifting assembly 3. The hand wheel drives the screw to rotate. Based on the principle of threaded transmission between the screw and the screw slider, the screw slider moves up and down along the screw axis, thereby driving the lifting platform 6 fixedly connected to the lifting seat outside the screw slider to rise and fall synchronously until the hammers 5 on the lifting platform 6 are at the appropriate striking height to adapt to the white or black key area of different pianos.

[0060] The controller 2 is sent an instruction via the button switch 7 on the movable workbench 1 or an external device such as a computer, tablet computer, etc. If the button switch 7 is operated and the corresponding button is pressed, the motor can be controlled to rotate forward or reverse in slow motion, or to run at the original speed preset by the controller 2. After receiving the instruction, the controller 2 drives the servo motor 4 to start. The driving shaft of the servo motor 4 drives the driving rod 41 to make a circular motion. The driving rod 41 pushes the pendulum 82 to swing around the rotating shaft 84 through the connecting rod 81. The knocking rod 83 at the outer end of the pendulum 82 moves up and down accordingly, and finally drives the hammer 5 to complete the knocking action on the piano keys. During the knocking process, the upper end of the hammer 5 is hinged to the lower end of the knocking rod 83, so that it can flexibly adjust the angle according to the reaction force of the keys, and the curved surface structure at the lower end evenly distributes the knocking force to reduce damage to the keys.

[0061] When remote control or data exchange is required, the device connects to an external device using the controller 2's communication interface, which supports Bluetooth, Wi-Fi, or USB protocols. The external device can send detailed control instructions to the controller 2, such as keystroke force, frequency, and number of keystrokes. The controller 2 then precisely adjusts the operating parameters of the servo motor 4 and lift assembly 3 accordingly. The device also provides feedback on its operating status and sensor data to the external device, facilitating real-time monitoring and data analysis by the operator, enabling more complex and diverse experiments or performances.

[0062] Finally, it should be noted that the controller 2 in this embodiment and the electronic components in the above parts are all universal standard parts or parts known to those skilled in the art. Their structures and principles can be known to those skilled in the art through technical manuals or through conventional experimental methods. In the idle area of this device, all the above electrical components are connected respectively through wires. The specific connection means should refer to the working sequence between the electrical components in the above working principle to complete the electrical connection, which are all well-known technologies in the art.

[0063] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A piano keystroke control device comprising a movable workbench (1), characterized in that: The movable workbench (1) is a two-layer structure, wherein a controller (2) is installed on the lower layer, and a lifting workbench (6) is installed on the upper layer. The lifting workbench (6) is driven by a lifting assembly (3) to perform a lifting operation. A linkage assembly (8) is installed on the lifting workbench (6). One end of the linkage assembly (8) is driven by a servo motor (4). A hammer (5) is installed on the other end of the linkage assembly (8). The servo motor (4) is driven by rotation, and then drives the hammer (5) to perform a knocking action through the linkage assembly (8); a driving rod (41) is installed on the driving shaft of the servo motor (4). The linkage assembly (8) includes a connecting rod (81). The end of the driving rod (41) is connected to a rocking rod (82) through the connecting rod (81). A knocking rod (83) is installed on the outer end of the rocking rod (82). The end of the knocking rod (83) is connected to the hammer (5).

2. The piano keystroke control device according to claim 1, characterized in that: A roller (11) is installed at the bottom of the movable workbench (1), a brake is installed on the roller (11), and an armrest (12) is installed on one side of the top of the movable workbench (1).

3. The piano keystroke control device according to claim 1, wherein: A button switch (7) is installed on one side of the movable workbench (1), and the button switch (7) is electrically connected to the controller (2). The controller (2) controls the lifting component (3) and the servo motor (4) to work.

4. The piano keystroke control device according to claim 1, wherein: The lifting assembly (3) comprises a shell, a vertical screw rod is installed inside the shell, a screw rod slider is installed on the screw rod, a lifting seat is installed outside the screw rod slider, and the lifting workbench (6) is fixed on the lifting seat.

5. The piano keystroke control device according to claim 4, characterized in that: A hand wheel is installed on the top of the lifting assembly (3), which is connected to the upper end of the screw rod. The bottom of the lifting assembly (3) is fixed to the movable workbench (1) by bolts.

6. The piano keystroke control device according to claim 1, wherein: One end of the connecting rod (81) is rotatably connected to the driving rod (41), the other end of the connecting rod (81) is rotatably connected to the middle part of the rocker arm (82), and one end of the rocker arm (82) is rotatably connected to the lifting workbench (6) via a rotating shaft (84).

7. The piano keystroke control device according to claim 1, wherein: The knocking rod (83) is arranged vertically, the upper end of the hammer (5) is hinged to the lower end of the knocking rod (83), and the lower end of the hammer (5) is an arc-shaped surface structure.

8. The piano keystroke control device according to claim 1, wherein: The controller (2) further comprises a communication interface, which supports Bluetooth, Wi-Fi or USB communication protocols and is used for data transmission and remote control with external devices.

9. The piano keystroke control device according to claim 1, wherein: Each rotating connection of the linkage assembly (8) is equipped with a bearing or a self-lubricating bushing to reduce friction resistance and wear, thereby improving transmission efficiency and service life.

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