Magnetorheological material touch key damping adjusting keyboard and system

Abstract

The invention provides a magneto-rheological material touch key damping adjusting keyboard and system, and relates to the field of touch key damping adjusting keyboards. The magneto-rheological material touch key damping adjusting keyboard comprises keys and a liquid storage cylinder, clamping grooves are formed in the front ends of the lower surfaces of the keys, a piston rod is arranged in the liquid storage cylinder, the upper end and the lower end of the outer wall of a rod body of the piston rod are both in sliding connection with the liquid storage cylinder, and a pressure sensor is arranged in the middle of the upper surface of the piston rod. A first sealing ring is fixedly connected to the middle of the top face in the liquid storage cylinder, and a second sealing ring is fixedly connected to the middle of the bottom face in the liquid storage cylinder. According to the magneto-rheological material touch key damping adjustment keyboard and system, the piston rod provided with the pressure sensor is matched with the liquid storage barrel provided with the magneto-rheological fluid for use, the resistance of the magneto-rheological fluid can be dynamically adjusted according to the pressing force of a user, and therefore the movement resistance of the piston rod is adjusted, and the touch feeling of the user is improved.

Description

Technical Field

[0001] The invention relates to the field of touch-key damping adjustment keyboards, in particular to a magnetorheological material touch-key damping adjustment keyboard and a system. Background Art

[0002] Most existing piano keys indirectly affect the touch feel through mechanical springs, counterweights, or adjustments to the action components. These methods require physical disassembly of components or rely on empirical debugging, cannot be adjusted dynamically in real time, and are easily affected by ambient temperature and humidity.

[0003] In addition, the existing electric piano keys simulate the touch through rubber pads or simple springs, which have a different feel from that of a real piano. The feedback is single and lacks the dynamic damping changes of a real piano, making it difficult to meet the needs of professional performance. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a magnetorheological material touch damping adjustment keyboard and system, which solves the problem that the existing piano keys indirectly affect the touch feel through mechanical springs, counterweights or adjustment of hammer mechanism components. Such methods require physical disassembly of components or rely on experience-based debugging, cannot be adjusted dynamically in real time, and are easily affected by environmental temperature and humidity. It also solves the problem that the existing electric piano keys simulate the touch through rubber pads or simple springs, the feel of which is different from that of a real piano, the feedback is single and lacks the dynamic damping changes of a real piano, making it difficult to meet the needs of professional performance.

[0006] (2) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a magnetorheological material touch-key damping adjustment keyboard, comprising a key and a liquid reservoir, a card slot is provided at the front end of the lower surface of the key, a piston rod is provided inside the liquid reservoir, the upper end and the lower end of the outer wall of the piston rod are both slidably connected to the liquid reservoir, a pressure sensor is provided in the middle of the upper surface of the piston rod, a No. 1 sealing ring is fixedly connected to the middle of the top surface of the liquid reservoir, a No. 2 sealing ring is fixedly connected to the middle of the bottom surface of the liquid reservoir, the lower end of the piston rod passes through the liquid reservoir and is fixedly connected to two conductive blocks, a conductive slider is fixedly connected to the middle of the lower surface of the liquid reservoir, the conductive blocks all slide inside the conductive slider, magnetorheological fluid is provided inside the liquid reservoir, and an electromagnetic coil is wound around the middle of the outer wall of the piston rod;

[0008] Through the above technical solution, a piston rod and a conductive slider provided with a conductive block are used in conjunction with a liquid storage cylinder provided with magnetorheological fluid, thereby replacing the traditional mechanical mechanism, reducing the influence of environmental temperature and humidity, and extending the service life and response speed of the magnetorheological material touch damping adjustment keyboard, thereby meeting professional performance needs.

[0009] Preferably, the upper end of the piston rod is connected to the card slot by snapping, and the piston rod is made of aluminum alloy;

[0010] Through the above technical solution, the user can press the keys with his fingers to make the keys contact the piston rod equipped with a pressure sensor, thereby changing the value of the pressure sensor and causing the piston rod to move vertically downward, causing the piston rod to squeeze the magnetorheological fluid inside the liquid storage cylinder.

[0011] Preferably, a buffer pad is fixedly connected to the middle of the upper surface of the liquid storage cylinder, the buffer pad is tightly fitted with the piston rod, and the electromagnetic coil is located inside the liquid storage cylinder;

[0012] Through the above technical solution, the setting of the buffer pad can reduce the impact force of the head of the piston rod on the upper end of the liquid reservoir, thereby preventing the piston rod and the liquid reservoir from being damaged due to collision. The conductive slider of the external power supply transmits electricity to the electromagnetic coil through the conductive block, thereby changing the magnetic field strength of the electromagnetic coil, causing the particles in the magnetorheological fluid to form a chain structure, increasing the resistance of the magnetorheological fluid, thereby increasing the resistance to the movement of the piston rod and improving the touch feel of the keys.

[0013] Preferably, the No. 1 sealing ring and the No. 2 sealing ring are both made of polytetrafluoroethylene material, the No. 1 sealing ring is tightly fitted with the piston rod, and the No. 2 sealing ring is tightly fitted with the piston rod;

[0014] Through the above technical solution, the No. 1 sealing ring and the No. 2 sealing ring are used in conjunction with each other to prevent the magnetorheological fluid from leaking from between the piston rod and the liquid storage cylinder.

[0015] Preferably, the system comprises a user operation interface module, a microprocessor, and a memory integrated on a control panel, and further comprises a PID control module and a sensor assembly, wherein the sensor assembly comprises the pressure sensor as described in claim 1, and the user operation interface module is used to provide a human-computer interaction interface between a user and the magnetorheological material touch-key damping adjustment keyboard system, supports the user to pre-set the parameters of the pressure sensor through the input device on the control panel, and supports the user to pre-set the current value required for the damping parameter of the magnetorheological fluid corresponding to the previously set pressure sensor parameter through the input device on the control panel;

[0016] Preferably, the memory is used to store the control algorithm and pressure sensor parameters preset by the user, and the microprocessor is used to run the control algorithm, process the pressure sensor parameters in real time, calculate the required damping parameters of the magnetorheological fluid, coordinate the work of each module, output current instructions and drive the circuit to change the damping of the magnetorheological fluid;

[0017] Through the above technical solution, the microprocessor receives the parameters measured by the pressure sensor when the user presses, and compares them with the pre-set pressure sensor parameters, thereby running the control algorithm of the PID control module, and then comparing the parameter deviation obtained by running the control algorithm of the PID control module. The microprocessor then outputs instructions, thereby driving the circuit to adjust the current value of the electromagnetic coil, thereby adjusting the magnetic field strength of the electromagnetic coil.

[0018] Preferably, the PID control module is used to calculate the deviation between the value of the pressure sensor and the pre-set parameters of the pressure sensor, and transmit the calculation result to the microprocessor;

[0019] Through the above technical solution, the stability and dynamic performance of the magnetorheological material touch damping adjustment keyboard system are ensured by the coordinated use of the microprocessor and the PID control module.

[0020] Preferably, the pressure sensor is used to measure the pressure applied by the user and transmit the measured value to the microprocessor;

[0021] Through the above technical solution, the pressure sensor can detect the value change when the user presses the key in real time, thereby improving the response speed of the magnetorheological material touch damping adjustment keyboard system.

[0022] (3) Beneficial effects

[0023] The present invention provides a magnetorheological material touch damping adjustment keyboard and system, which has the following beneficial effects:

[0024] 1. The present invention provides a keyboard and system for adjusting touch-key damping using magnetorheological materials. By using a piston rod equipped with a pressure sensor in conjunction with a reservoir containing magnetorheological fluid, the resistance of the magnetorheological fluid can be dynamically adjusted according to the force of the user's pressing, thereby adjusting the resistance of the piston rod movement and improving the user's tactile sensation.

[0025] 2. The present invention provides a magnetorheological material touch-key damping adjustment keyboard and system. By using a piston rod equipped with a conductive block and a conductive slider in conjunction with a liquid storage cylinder equipped with magnetorheological fluid, the traditional mechanical mechanism is replaced, the influence of ambient temperature and humidity is reduced, and the service life and response speed of the magnetorheological material touch-key damping adjustment keyboard are extended, thereby meeting professional performance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1It is a schematic diagram of the main structure of the piano keys, liquid storage cylinder and conductive slider from a first perspective of the present invention;

[0027] Figure 2 A schematic diagram of the main structure of the piano keys, liquid storage cylinder and conductive slider from a second perspective of the present invention;

[0028] Figure 3 It is a partial exploded view of the piano keys, liquid storage cylinder and conductive slider of the present invention;

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 This is a structural diagram of the magnetorheological material touch key damping adjustment keyboard system of the present invention.

[0031] Among them, 1. Piano key; 2. Card slot; 3. Piston rod; 4. Pressure sensor; 5. Liquid storage cylinder; 6. Conductive slider; 7. Conductive block; 8. No. 1 sealing ring; 9. No. 2 sealing ring; 10. Electromagnetic coil; 11. Buffer pad. DETAILED DESCRIPTION

[0032] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] like Figure 1-4 As shown, a specific embodiment of the present invention is provided: a magnetorheological material touch damping adjustment keyboard, comprising a key 1 and a liquid reservoir 5, a card slot 2 is provided at the front end of the lower surface of the key 1, a piston rod 3 is provided inside the liquid reservoir 5, the upper end and the lower end of the outer wall of the rod body of the piston rod 3 are both slidably connected to the liquid reservoir 5, a pressure sensor 4 is provided in the middle of the upper surface of the piston rod 3, a No. 1 sealing ring 8 is fixedly connected to the middle of the top surface of the liquid reservoir 5, a No. 2 sealing ring 9 is fixedly connected to the middle of the bottom surface of the liquid reservoir 5, the lower end of the piston rod 3 passes through the liquid reservoir 5 and is fixedly connected to two conductive blocks 7, a conductive slider 6 is fixedly connected to the middle of the lower surface of the liquid reservoir 5, the conductive blocks 7 all slide inside the conductive slider 6, magnetorheological fluid is provided inside the liquid reservoir 5, and an electromagnetic coil 10 is wound around the middle of the outer wall of the piston rod 3;

[0034] The upper end of the piston rod 3 is connected with the card slot 2. The piston rod 3 is made of aluminum alloy. The user can press the key 1 with his finger to make the key 1 contact the piston rod 3 provided with the pressure sensor 4, thereby changing the value of the pressure sensor 4 and making the piston rod 3 move vertically downward, so that the piston rod 3 squeezes the magnetorheological fluid inside the liquid reservoir 5. The middle part of the upper surface of the liquid reservoir 5 is fixedly connected with a buffer pad 11. The buffer pad 11 fits tightly with the piston rod 3. The electromagnetic coil 10 is located inside the liquid reservoir 5. The setting of the buffer pad 11 can reduce the impact force of the head of the piston rod 3 on the upper end of the liquid reservoir 5, thereby preventing the piston rod 3 from When the liquid storage cylinder 5 is damaged due to collision, the conductive slider 6 of the external power supply transmits electricity to the electromagnetic coil 10 through the conductive block 7, thereby changing the magnetic field strength of the electromagnetic coil 10, so that the particles in the magnetorheological fluid form a chain structure, increasing the resistance of the magnetorheological fluid, thereby increasing the resistance to the movement of the piston rod 3 and improving the touch feel of the key 1. The No. 1 sealing ring 8 and the No. 2 sealing ring 9 are both made of polytetrafluoroethylene material. The No. 1 sealing ring 8 fits tightly against the piston rod 3, and the No. 2 sealing ring 9 fits tightly against the piston rod 3. The coordinated use of the No. 1 sealing ring 8 and the No. 2 sealing ring 9 prevents the magnetorheological fluid from leaking from between the piston rod 3 and the liquid storage cylinder 5.

[0035] like Figure 5As shown, another specific embodiment provided by the present invention: a magnetorheological material touch-key damping adjustment keyboard system, including a user operation interface module, a microprocessor, and a memory integrated on a control panel, and also including a PID control module and a sensor component, the sensor component including the pressure sensor 4 in claim 1, the user operation interface module is used to provide a human-computer interaction interface between the user and the magnetorheological material touch-key damping adjustment keyboard system, supports the user to pre-set the parameters of the pressure sensor 4 through the input device on the control panel, and supports the user to pre-set the current value required for the damping parameter of the magnetorheological fluid corresponding to the previously set parameters of the pressure sensor 4 through the input device on the control panel, the memory is used to store the control algorithm and the parameters of the pressure sensor 4 pre-set by the user, the microprocessor is used to run the control algorithm, process the parameters of the pressure sensor 4 in real time, calculate the required damping parameters of the magnetorheological fluid, coordinate the work of each module, output current instructions and drive the circuit to change the magnetorheological The damping of the liquid is measured by the pressure sensor 4 through the microprocessor, and the parameters of the user pressing are measured, and the pre-set parameters of the pressure sensor 4 are compared, thereby running the control algorithm of the PID control module, thereby comparing the parameter deviation obtained by running the control algorithm of the PID control module, and then the microprocessor outputs an instruction, thereby driving the circuit to adjust the current value of the electromagnetic coil 10, thereby adjusting the magnetic field strength of the electromagnetic coil 10. The PID control module is used to calculate the deviation between the value of the pressure sensor 4 and the pre-set parameters of the pressure sensor 4, and transmit the calculation result to the microprocessor. The cooperation between the microprocessor and the PID control module ensures the stability and dynamic performance of the magnetorheological material touch damping adjustment keyboard system. The pressure sensor 4 is used to measure the user's pressing force and transmit the measured value to the microprocessor. The pressure sensor 4 can detect the value change when the user presses the key 1 in real time, thereby improving the response speed of the magnetorheological material touch damping adjustment keyboard system.

[0036] Working principle: When using the magnetorheological material touch damping adjustment keyboard, first, the user's finger presses the key 1, so that the key 1 contacts the piston rod 3 equipped with a pressure sensor 4, and the piston rod 3 moves vertically downward, so that the piston rod 3 squeezes the magnetorheological fluid inside the liquid storage cylinder 5, and the pressure sensor 4 measures the value of the user's finger pressing the key 1. Secondly, the microprocessor receives the parameters measured by the pressure sensor 4 when the user presses, and compares them with the pre-set pressure sensor 4 parameters, thereby running the control algorithm of the PID control module, thereby comparing the parameter deviation obtained by running the control algorithm of the PID control module, and then the microprocessor outputs an instruction, thereby driving the circuit to adjust the current value of the electromagnetic coil 10, that is, adjust the magnetic field strength of the electromagnetic coil 10. Finally, the particles in the magnetorheological fluid form a chain structure, increasing the resistance of the magnetorheological fluid, thereby increasing the resistance of the piston rod 3 movement, and improving the touch feel of the key 1.

[0037] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A magnetorheological material touch damping adjustment keyboard, comprising a key (1) and a liquid storage cylinder (5), characterized in that: A card slot (2) is provided at the front end of the lower surface of the key (1); a piston rod (3) is provided inside the liquid storage cylinder (5); the upper end and the lower end of the outer wall of the piston rod (3) are both slidably connected to the liquid storage cylinder (5); a pressure sensor (4) is provided in the middle of the upper surface of the piston rod (3); a No. 1 sealing ring (8) is fixedly connected to the middle of the top surface of the liquid storage cylinder (5); a No. 2 sealing ring (9) is fixedly connected to the middle of the bottom surface of the liquid storage cylinder (5); the lower end of the piston rod (3) passes through the liquid storage cylinder (5) and is fixedly connected to two conductive blocks (7); a conductive slider (6) is fixedly connected to the middle of the lower surface of the liquid storage cylinder (5); the conductive blocks (7) all slide inside the conductive slider (6); a magnetorheological fluid is provided inside the liquid storage cylinder (5); an electromagnetic coil (10) is wound around the middle of the outer wall of the piston rod (3).

2. The magnetorheological material touch key damping adjustment keyboard according to claim 1, characterized in that: The upper end of the piston rod (3) is connected to the clamping groove (2) by clamping, and the piston rod (3) is made of aluminum alloy material.

3. The magnetorheological material touch damping adjustment keyboard according to claim 1, characterized in that: A buffer pad (11) is fixedly connected to the middle of the upper surface of the liquid storage cylinder (5), and the buffer pad (11) is tightly fitted with the piston rod (3). The electromagnetic coil (10) is located inside the liquid storage cylinder (5).

4. The magnetorheological material touch damping adjustment keyboard according to claim 1, characterized in that: The first sealing ring (8) and the second sealing ring (9) are both made of polytetrafluoroethylene material. The first sealing ring (8) is tightly fitted with the piston rod (3), and the second sealing ring (9) is tightly fitted with the piston rod (3).

5. Magnetorheological material touch key damping adjustment keyboard system, characterized by: The invention comprises a user operation interface module, a microprocessor, and a memory integrated on a control panel, and also comprises a PID control module and a sensor component, wherein the sensor component comprises the pressure sensor (4) described in claim 1, and the user operation interface module is used to provide a human-computer interaction interface between a user and the magnetorheological material touch-key damping adjustment keyboard system, supports the user to pre-set the parameters of the pressure sensor (4) through the input device on the control panel, and supports the user to pre-set the current value required for the damping parameter of the magnetorheological fluid corresponding to the previously set pressure sensor (4) parameter through the input device on the control panel.

6. The magnetorheological material touch damping adjustment keyboard system according to claim 5, characterized in that: The memory is used to store the control algorithm and the parameters of the pressure sensor (4) preset by the user, and the microprocessor is used to run the control algorithm, process the parameters of the pressure sensor (4) in real time, calculate the required damping parameters of the magnetorheological fluid, coordinate the work of each module, output current instructions, and drive the circuit to change the damping of the magnetorheological fluid.

7. The magnetorheological material touch damping adjustment keyboard system according to claim 5, characterized in that: The PID control module is used to calculate the deviation between the value of the pressure sensor (4) and the pre-set parameters of the pressure sensor (4), and transmit the calculation result to the microprocessor.

8. The magnetorheological material touch damping adjustment keyboard system according to claim 5, characterized in that: The pressure sensor (4) is used to measure the pressing force of the user and transmit the measured value to the microprocessor.

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