A soft reset type electric piano weighted keyboard

Abstract

The present invention discloses a soft-reset electric piano weighted keyboard, which relates to the technical field of piano equipment, comprising a piano case; a key assembly is provided on the top of the piano case; an articulated frame is fixedly installed on the bottom of the piano case by bolts, and a soft playing feel with feedback is achieved through precise mechanical linkage. At the same time, the position of the inductor is changed by sliding and squeezing the card beads using the weight, and combined with light sensing auxiliary monitoring, high-precision and high-reliability pressing force detection is achieved, and this force signal is converted into the keyboard "aftertouch layer" control, and single-key or global sustain mode is intelligently assigned; in addition, the contact state of the keys is accurately captured by photoelectric sensing, and the hand movements are spatially captured in combination with infrared cameras and sensor radars, and electromagnetic drive is used to provide real-time tactile feedback.

Description

Technical Field

[0001] The invention relates to the technical field of piano equipment, in particular to a soft-reset type electric piano weighted keyboard. Background Art

[0002] Traditional keyboard instruments face many technical bottlenecks in their pursuit of expressive performance: First, the difficulty in balancing feel and detection; although the mechanical counterweight structure can provide basic feel, it is difficult to achieve high-precision, high-reliability real-time pressure detection at the same time, and the force detection element is easily affected by the environment or has the risk of failure, resulting in inaccurate dynamic performance feedback; second, the mechanization and functional limitations of sustain control; the sustain effect usually relies on a physical pedal, which cannot be intelligently triggered according to the force of a single key touch, and it is even more difficult to achieve dynamic sustain control at the "aftertouch" level, which limits the performer's delicate control over the time dimension of the tone; third, the single and fragmented interactive dimension; the existing system lacks multi-dimensional synchronous capture and fusion analysis of the hand's spatial posture, key contact accuracy and pressure. Summary of the Invention

[0003] Therefore, in order to solve the above-mentioned shortcomings, the present invention provides a soft-reset type electronic piano weighted keyboard.

[0004] The present invention is achieved by constructing a soft-reset electric piano weighted keyboard, which includes a piano case; a key assembly is arranged on the top of the piano case; an articulated frame is fixedly installed on the bottom of the piano case by bolts; a first fixed frame is fixedly installed on the top of the articulated frame by bolts; and an electric control button with data transmission is fixedly arranged on the top of the first fixed frame.

[0005] Preferably, a limit rod is rotatably installed in the limit slot on the top side of the articulated frame, and a counterweight connecting rod is rotatably installed on the limit rod; a counterweight block is fixedly installed on the rod body of the counterweight connecting rod; a three-section assembly is fixedly installed on the top of the articulated frame by bolts, and a counterweight connecting rod and a counterweight block are slidably arranged on the inner side of the three-section assembly; a tension spring is fixedly installed on the upper end of the key assembly, and the bottom of the tension spring is fixedly installed on the top side of the articulated frame; a groove is provided on the front middle side of the top of the piano case, and a coil block is fixedly installed on the top side of the groove by bolts; a rotating shell is rotatably installed on the side of the groove, and a permanent magnet is fixedly installed on the side of the rotating shell by bolts; an infrared camera with data acquisition function is fixedly installed on the bottom of the rotating shell by bolts, and an integrated control board is integrated on the bottom side of the infrared camera; the integrated control board is connected to the coil block and sensor radar respectively through cables, and the sensor radars are arranged on the front side of the piano case.

[0006] Preferably, the key assembly includes a key body rotatably arranged on the top side of the hinged frame, and a C-shaped block is adhesively fixed to the middle side of the bottom of the key body; the C-shaped block is rotatably installed on the top of the counterweight connecting rod; LED lamp beads are fixed to the middle side of the bottom of the key body by bolts; diffuser columns are arranged on the top of the key body; a photosensitive plate is fixedly installed on the front side of the bottom of the key body, and a light-transmitting plate is elastically installed on the top of the key body; a silicone baffle is fixedly installed on the front side of the bottom of the light-transmitting plate, and the silicone baffle and the diffuser columns are staggered.

[0007] Preferably, the three-section assembly includes a partition plate fixedly installed on the top of the articulated frame by bolts, and the partition plate is fixedly installed on the left and right sides of the second fixed frame by bolts; a single control chip is fixedly installed on the middle side of the second fixed frame by bolts, and the single control chip is fixedly installed with the optical sensor assembly through a cable.

[0008] Preferably, the optical sensor assembly is fixedly mounted on the side of the partition plate by means of bolts, and the optical sensor assembly specifically consists of a light source and a photoreceptor; a pressure piece is provided inside the second fixing frame.

[0009] Preferably, the pressure-bearing part includes a mounting shell fixedly installed in the inner groove of the second fixing frame by bolts; the first inductor is fixedly installed on the top of the second fixing frame by bolts, and a spring with a reset function is fixedly installed on the bottom of the first inductor; the bottom of the spring is fixedly installed on the top of the second inductor, and a card is provided at the bottom of the second inductor; the second inductor is slidably arranged inside the mounting shell.

[0010] Preferably, two groups of pressure-bearing parts are fixedly arranged inside the second fixing frame, and the angle between the two groups of pressure-bearing parts is 30 degrees; a counterweight block is slidably arranged inside the second fixing frame, and the counterweight block is in contact with the card bead.

[0011] Preferably, the coil block and the permanent magnet constitute a magnetic field drive system, and the integrated control board monitors the player's hand position in real time based on the infrared camera and the sensor radar, and feeds back the signal to the integrated control board to determine the sliding trajectory of the adjustment counterweight block.

[0012] Preferably, the light source emission axis of the LED lamp bead forms an angle of 45° with the central axis of the scattered light column, and the photosensitive plate receives the light intensity signal after being scattered by the scattered light column and the silicone baffle.

[0013] Preferably, the first inductor sheet and the second inductor sheet form a variable-spacing inductor pair. When the counterweight block squeezes the card bead, the second inductor sheet slides along the mounting shell, reducing the spacing between the first inductor sheet and the second inductor sheet, resulting in an increase in the mutual inductance coefficient; when the spring is reset, the spacing between the first inductor sheet and the second inductor sheet increases, and the mutual inductance coefficient decreases. The single control chip calculates the real-time displacement of the counterweight block by detecting the change in inductance.

[0014] A method for using a soft-reset weighted keyboard of an electric piano comprises the following steps:

[0015] Step 1: Precision mechanical linkage and tactile feedback: Pressing the key body causes the counterweight connecting rod and counterweight to tilt up, stretching the tension spring at the end to store energy; when the key body is released, the counterweight's own weight and the elastic force of the tension spring work together to provide a gentle return feel and playing tactile sensation; the counterweight slides within the second fixed frame;

[0016] Step 2: Intelligent velocity detection and sustain control. As the weight slides, it squeezes the bead, pushing the second inductor to move. The change in inductance accurately detects the force of the press. An optical sensor component helps monitor the position of the weight, ensuring reliable velocity detection. Pressure on the bead provides tactile feedback and transfers the sustain function from the foot pedal to the keyboard's "aftertouch layer." A dual-sensor design enables mode switching: single-key sustain or global sustain.

[0017] Step 3: Photoelectric interaction and multi-technology fusion motion capture; fingers press / lift the transparent plate to control the position of the silicone baffle, blocking or allowing the LED lamp beads to be detected by the photosensitive plate after being refracted by the scattered light column, and judge the contact status of the key body; the infrared camera and coil block capture the player's hand movement data; the integrated control board comprehensively analyzes the force data, contact accuracy data and hand movement data to achieve accurate motion capture and interactive feedback.

[0018] The present invention has the following advantages: The present invention provides a soft-reset weighted keyboard for an electric piano through improvements, which has the following improvements compared to similar devices:

[0019] The soft-reset electric piano weighted keyboard described in the present invention achieves a soft and responsive playing feel through precise mechanical linkage. At the same time, the weight slides and squeezes the card beads to change the position of the inductor. Combined with light sensing auxiliary monitoring, high-precision and high-reliability pressing force detection is achieved, and this force signal is converted into the keyboard "aftertouch layer" control, intelligently assigning single key or global sustain mode; in addition, photoelectric sensing is used to accurately capture the contact state of the keys, and infrared cameras and sensor radars are combined to capture hand movements in space, and electromagnetic drive is used to provide real-time tactile feedback; the integrated control panel integrates force data, contact accuracy data and hand movement data, achieving a high degree of integration of mechanical precision and electronic intelligence, providing the player with multi-dimensional perception and direct control capabilities of finger force, key state and spatial posture. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the present invention;

[0021] Figure 2 It is a schematic structural diagram of the piano key assembly and the hinge frame of the present invention;

[0022] Figure 3 It is a schematic diagram of the exploded structure of the piano key assembly and the hinge frame of the present invention;

[0023] Figure 4 The present invention Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 5 The present invention Figure 3 Schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 6 It is a schematic diagram of the exploded structure of the piano key assembly of the present invention;

[0026] Figure 7 It is a schematic diagram of the structure of the counterweight connecting rod, the limiting rod, the counterweight block and the three-section assembly of the present invention;

[0027] Figure 8 It is a schematic diagram of the exploded structure of the three-section assembly of the present invention;

[0028] Figure 9 It is a schematic diagram of the exploded structure of the pressure-bearing part of the present invention.

[0029] The components include: piano case 1, key assembly 2, hinged frame 3, first fixed frame 4, electronic control button 5, counterweight connecting rod 6, limit rod 7, counterweight block 8, three-section assembly 9, tension spring 10, rotating housing 11, permanent magnet 12, infrared camera 13, integrated control board 14, coil block 15, sensor radar 16, key body 21, C-shaped block 22, LED lamp beads 23, diffuser column 24, photosensitive plate 25, light-transmitting plate 26, silicone baffle 27, partition plate 91, second fixed frame 92, single control chip 93, optical sensor assembly 94, pressure piece 95, mounting housing 951, first inductor 952, spring 953, second inductor 954, and retaining bead 955. DETAILED DESCRIPTION

[0030] The following is combined with Figures 1 to 9 The principles and features of the present invention are described, and the examples given are only for the purpose of explaining the present invention and are not intended to limit the scope of the present invention. The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. It should be noted that the drawings are all in a very simplified form and are not to exact scale, and are only used for the purpose of conveniently and clearly assisting in illustrating the embodiments of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. The following describes an embodiment of the present invention based on its overall structure.

[0033] Example 1:

[0034] See also Figures 1 to 9The present invention provides a soft-reset electric piano weighted keyboard, comprising a piano case 1; a key assembly 2 is provided on the top of the piano case 1; an articulated frame 3 is fixedly installed on the bottom of the piano case 1 by bolts; a first fixed frame 4 is fixedly installed on the top of the articulated frame 3 by bolts; an electric control button 5 with data transmission is fixedly provided on the top of the first fixed frame 4.

[0035] A limit rod 7 is rotatably installed in the limit groove on the top side of the articulated frame 3, and a counterweight connecting rod 6 is rotatably installed on the limit rod 7; a counterweight block 8 is fixedly installed on the rod body of the counterweight connecting rod 6; a three-section component 9 is fixedly installed on the top of the articulated frame 3 by bolts, and a counterweight connecting rod 6 and a counterweight block 8 are slidably arranged on the inner side of the three-section component 9; a tension spring 10 is fixedly installed on the upper end of the key assembly 2, and the bottom of the tension spring 10 is fixedly installed on the top side of the articulated frame 3; a groove is provided on the front middle side of the top of the piano case 1, and a coil block 15 is fixedly installed on the top side of the groove by bolts; a rotating shell 11 is rotatably installed on the side of the groove, and a permanent magnet 12 is fixedly installed on the side of the rotating shell 11 by bolts; an infrared camera 13 with a data acquisition function is fixedly installed on the bottom of the rotating shell 11 by bolts, and an integrated control board 14 is integrated on the bottom side of the infrared camera 13; the integrated control board 14 is connected to the coil block 15 and the sensor radar 16 respectively through cables, and the sensor radar 16 is arranged on the front side of the piano case 1.

[0036] The three-section assembly 9 includes a partition plate 91 fixedly installed on the top of the articulated frame 3 by bolts, and the partition plate 91 is fixedly installed on the left and right sides of the second fixed frame 92 by bolts; a single control chip 93 is fixedly installed on the middle side of the second fixed frame 92 by bolts, and the single control chip 93 is fixedly installed with the optical sensor assembly 94 through a cable.

[0037] The optical sensor assembly 94 is fixedly mounted on the side of the partition plate 91 by means of bolts, and the optical sensor assembly 94 is specifically composed of a light source and a photoreceptor; a pressure piece 95 is provided inside the second fixing frame 92 .

[0038] The pressure-bearing member 95 includes a mounting shell 951 fixedly mounted on the inner groove of the second fixing frame 92 by bolts; a first inductor 952 is fixedly mounted on the top of the second fixing frame 92 by bolts, and a spring 953 with a reset function is fixedly mounted on the bottom of the first inductor 952; the bottom of the spring 953 is fixedly mounted on the top of the second inductor 954, and a locking bead 955 is provided at the bottom of the second inductor 954; the second inductor 954 is slidably arranged inside the mounting shell 951.

[0039] Two groups of pressure-bearing members 95 are fixedly provided inside the second fixing frame 92 , and the angle between the two groups of pressure-bearing members 95 is 30 degrees; a counterweight block 8 is slidably provided inside the second fixing frame 92 , and the counterweight block 8 is in contact with the card bead 955 .

[0040] The coil block 15 and the permanent magnet 12 constitute a magnetic field drive system. The integrated control board 14 monitors the player's hand position in real time based on the infrared camera 13 and the sensor radar 16, and feeds back the signal to the integrated control board 14 to determine the sliding trajectory of the adjustment counterweight 8.

[0041] The first inductor 952 and the second inductor 954 form a variable-spacing inductor pair. When the counterweight 8 squeezes the card bead 955, the second inductor 954 slides along the mounting shell 951, reducing the distance between the first inductor 952 and the second inductor 954, resulting in an increase in the mutual inductance coefficient; when the spring 953 is reset, the distance between the first inductor 952 and the second inductor 954 increases, and the mutual inductance coefficient decreases. The single control chip 93 calculates the real-time displacement of the counterweight 8 by detecting the change in inductance.

[0042] Example 2:

[0043] See also Figures 1 to 9 Compared with the first embodiment, the present invention provides a soft-reset electric piano weighted keyboard, and this embodiment further includes: a key assembly 2 includes a key body 21 rotatably mounted on the top side of the hinge frame 3, and a C-shaped block 22 is adhesively fixed to the middle side of the bottom of the key body 21; the C-shaped block 22 is rotatably mounted on the top of the weight connecting rod 6; an LED lamp bead 23 is fixedly mounted on the middle side of the bottom of the key body 21 by bolts; a diffuser column 24 is arranged on the top of the key body 21; a photosensitive plate 25 is fixedly mounted on the front side of the bottom of the key body 21, and a light-transmitting plate 26 is elastically adhesively mounted on the top of the key body 21; a silicone baffle 27 is fixedly mounted on the front side of the bottom of the light-transmitting plate 26, and the silicone baffle 27 and the diffuser column 24 are staggered.

[0044] The light source emission axis of the LED lamp bead 23 forms an angle of 45° with the central axis of the scattered light column 24 , and the photosensitive plate 25 receives the light intensity signal after being scattered by the scattered light column 24 and the silicone baffle 27 .

[0045] The working principle of a soft reset type electric piano weighted keyboard based on the above is:

[0046] First, when using this device, first place the device in the working area, then connect the device to an external power source to provide the power required for the device to work;

[0047] Secondly, during use, the player presses the key body 21 to rotate it on the hinge frame 3. At the same time, the C-shaped block 22 on the bottom side of the key body 21 pulls the counterweight connecting rod 6 and the counterweight 8 to form a tilting action, and simultaneously causes the key body 21 to pull the tension spring 10 at its end to deform and store energy. When the key body 21 is reset, the weight of the counterweight 8 and the reaction force of the tension spring 10 create a playing experience with a soft feel. Here, the counterweight connecting rod 6 and the counterweight 8 slide inside the second fixed frame 92. According to the player's pressing force, the counterweight 8 slides and squeezes the two sets of beads 955 of the second fixed frame 92. The beads 955 are squeezed and push the second inductor 954 to slide inside the mounting housing 951.

[0048] Third, the inductance data between the first inductor 952 and the second inductor 954 can be used to record the pressing force through the single control chip 93. Here, the optical sensor of the optical sensor component 94 cooperates to detect the tilting degree of the counterweight 8 to avoid failure of the first inductor 952. At the same time, the card bead 955 can provide feedback during the squeezing process of the counterweight 8, thereby converting the sustain function from a "pedal" to a "keyboard aftertouch layer" through the single control chip 93. By setting two groups of pressure-receiving parts 95, when the inductance data of the first inductor 952 and the second inductor 954 in a single group of pressure-receiving parts 95 changes, a single-key sustain mode is adopted: only the currently pressed key triggers the sustain, and when the inductance data of the first inductor 952 and the second inductor 954 in the two groups of pressure-receiving parts 95 change, the global sustain is activated;

[0049] Fourth, during the use of the piano by the player, the finger presses the light-transmitting plate 26 and the silicone baffle 27 on the bottom side blocks the gap of the diffuse light column 24, so that the light emitted by the LED lamp bead 23 at one end of the key body 21 is completely blocked on the side of the silicone baffle 27. At this time, the photosensitive plate 25 does not detect the light source. When the player lifts the finger, the light-transmitting plate 26 and the silicone baffle 27 return to their original position and the light emitted by the LED lamp bead 23 is evenly transmitted to the side of the photosensitive plate 25 through the refraction of the diffuse light column 24. Here, the photosensitive plate 25 detects the light source and transmits the data to the integrated control board 14 inside the piano case 1, and the infrared camera 1 3 and the sensor radar 16 collect data on the performer's hand movements. Here, the rotating shell 11 is driven to rotate by the repulsive effect of the same magnetic field between the coil block 15 and the permanent magnet 12 after being energized, and the integrated control board 14 is used to integrate and combine the hand data of the infrared camera 13 and the sensor radar 16, the contact accuracy data of the photosensitive plate 25, and the inductance data of the first inductor 952 and the second inductor 954, so as to realize the multi-technical integration of motion capture and tactile feedback, and judge the performer's movements more accurately, thereby realizing the direct control of the hand on the time and space dimensions of the timbre through mechanical precision + electronic intelligence.

[0050] The present invention provides an improved soft-reset electric piano weighted keyboard, which achieves a soft and feedback-oriented playing feel through precise mechanical linkage. At the same time, the weight 8 is used to slide and squeeze the card bead 955 to change the position of the inductor. Combined with light sensing auxiliary monitoring, high-precision and high-reliability pressing force detection is achieved, and this force signal is converted into the keyboard "aftertouch layer" control, and single-key or global sustain mode is intelligently assigned; in addition, the contact state of the keys is accurately captured through photoelectric sensing, and the hand movements are spatially captured by combining the infrared camera 13 and the sensor radar 16, and real-time tactile feedback is provided by electromagnetic drive; the integrated control board 14 integrates force data, contact accuracy data and hand movement data, achieving a high degree of integration of mechanical precision and electronic intelligence, providing the player with multi-dimensional perception and direct control capabilities of finger force, key state and spatial posture.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention, and the standard parts used in the present invention can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0052] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A soft reset type electric piano weighted keyboard, comprising a piano housing (1); a key assembly (2) is provided on the top of the piano housing (1); an articulated frame (3) is fixedly mounted on the bottom of the piano housing (1) by means of bolts; a first fixing frame (4) is fixedly mounted on the top of the articulated frame (3) by means of bolts; an electric control button (5) with data transmission function is fixedly mounted on the top of the first fixing frame (4); Its characteristics are: The limiting groove on the top side of the articulated frame (3) is rotatably mounted on a limiting rod (7), and a counterweight connecting rod (6) is rotatably mounted on the limiting rod (7); a counterweight block (8) is fixedly mounted on the rod body of the counterweight connecting rod (6); a three-section assembly (9) is fixedly mounted on the top of the articulated frame (3) by bolts, and a counterweight connecting rod (6) and a counterweight block (8) are slidably mounted on the inner side of the three-section assembly (9); a tension spring (10) is fixedly mounted on the upper end of the key assembly (2), and the bottom of the tension spring (10) is fixedly mounted on the top side of the articulated frame (3); a groove is provided on the front middle side of the top of the piano case (1). , and a coil block (15) is fixedly installed on the top side of the groove by bolts; a rotating shell (11) is rotatably installed on the side of the groove, and a permanent magnet (12) is fixedly installed on the side of the rotating shell (11) by bolts; an infrared camera (13) with a data acquisition function is fixedly installed on the bottom of the rotating shell (11) by bolts, and an integrated control board (14) is integrated on the bottom side of the infrared camera (13); the integrated control board (14) is connected to the coil block (15) and the sensor radar (16) respectively through cables, and the sensor radar (16) is arranged on the front side of the piano case (1).

2. The soft-reset weighted keyboard of a digital piano according to claim 1, characterized in that: The key assembly (2) comprises a key body (21) rotatably mounted on the top side of the hinge frame (3), and a C-shaped block (22) is adhesively fixed to the middle side of the bottom of the key body (21); the C-shaped block (22) is rotatably mounted on the top of the counterweight connecting rod (6); an LED lamp bead (23) is fixedly mounted on the middle side of the bottom of the key body (21) by means of bolts; a diffuser column (24) is arranged on the top of the key body (21); a photosensitive plate (25) is fixedly mounted on the front side of the bottom of the key body (21), and a light-transmitting plate (26) is elastically adhesively mounted on the top of the key body (21); a silicone baffle (27) is fixedly mounted on the front side of the bottom of the light-transmitting plate (26), and the silicone baffle (27) and the diffuser column (24) are arranged in an alternating manner.

3. The soft-reset weighted keyboard of a digital piano according to claim 2, characterized in that: The three-section assembly (9) comprises a partition plate (91) fixedly mounted on the top of the hinged frame (3) by means of bolts, and the partition plate (91) is fixedly mounted on the left and right sides of the second fixing frame (92) by means of bolts; a single control chip (93) is fixedly mounted on the middle side of the second fixing frame (92) by means of bolts, and the single control chip (93) is fixedly mounted to the optical sensor assembly (94) via a cable.

4. The soft-reset weighted keyboard of a digital piano according to claim 3, characterized in that: The light sensing assembly (94) is fixedly mounted on the side of the partition plate (91) by means of bolts, and the light sensing assembly (94) specifically comprises a light source and a photoreceptor; a pressure piece (95) is provided inside the second fixing frame (92).

5. The soft-reset weighted keyboard of a digital piano according to claim 4, characterized in that: The pressure-bearing member (95) comprises a mounting shell (951) fixedly mounted on the inner groove of the second fixing frame (92) by bolts; a first inductor (952) is fixedly mounted on the top of the second fixing frame (92) by bolts, and a spring (953) with a reset function is fixedly mounted on the bottom of the first inductor (952); the bottom of the spring (953) is fixedly mounted on the top of the second inductor (954), and a card bead (955) is provided on the bottom of the second inductor (954); the second inductor (954) is slidably arranged inside the mounting shell (951).

6. The soft-reset weighted keyboard of a digital piano according to claim 5, characterized in that: Two groups of pressure-bearing members (95) are fixedly arranged inside the second fixing frame (92), and the angle between the two groups of pressure-bearing members (95) is 30 degrees; a counterweight block (8) is slidably arranged inside the second fixing frame (92), and the counterweight block (8) is in contact with the card bead (955).

7. The soft-reset weighted keyboard of a digital piano according to claim 6, characterized in that: The coil block (15) and the permanent magnet (12) form a magnetic field drive system. The integrated control board (14) monitors the position of the player's hand in real time based on the infrared camera (13) and the sensor radar (16), and feeds back the signal to the integrated control board (14) to determine the sliding trajectory of the adjustment counterweight (8).

8. The soft-reset weighted keyboard of a digital piano according to claim 7, characterized in that: The light source emission axis of the LED lamp bead (23) forms an angle of 45° with the central axis of the scattered light column (24), and the photosensitive plate (25) receives the light intensity signal after being scattered by the scattered light column (24) and the silicone baffle (27).

9. The soft-reset weighted keyboard of a digital piano according to claim 8, characterized in that: The first inductor (952) and the second inductor (954) form a variable-spacing inductor pair. When the counterweight (8) squeezes the card bead (955), the second inductor (954) slides along the mounting housing (951), reducing the spacing between the first inductor (952) and the second inductor (954), thereby increasing the mutual inductance coefficient. When the spring (953) is reset, the spacing between the first inductor (952) and the second inductor (954) increases, and the mutual inductance coefficient decreases. The single control chip (93) calculates the real-time displacement of the counterweight (8) by detecting the change in inductance.

10. A method for using a soft-reset weighted keyboard for an electric piano, for implementing the soft-reset weighted keyboard for an electric piano as claimed in claim 9, characterized in that: The following steps are involved: Step 1: Precision mechanical linkage and hand-feel feedback; pressing the key body (21) drives the counterweight connecting rod (6) and the counterweight block (8) to tilt up, and stretches the end tension spring (10) to store energy; when the key body (21) is released, the counterweight block (8) and the elastic force of the tension spring (10) work together to provide a gentle reset feel and playing touch; the counterweight block (8) slides in the second fixed frame (92); Step 2: Intelligent force detection and sustain control; when the counterweight (8) slides, it squeezes the card bead (955), pushing the second inductor (954) to move, and accurately detecting the pressing force through the change of inductance data; the optical sensor component (94) assists in monitoring the position of the counterweight (8) to ensure the reliability of force detection; the card bead (955) provides tactile feedback when it is pressed, and transfers the sustain function from the foot pedal to the keyboard "aftertouch layer"; the dual sensor design realizes mode switching: single key sustain or global sustain; Step 3: Photoelectric interaction and multi-technology fusion motion capture; fingers press / lift the light-transmitting plate (26) to control the position of the silicone baffle (27), blocking or allowing the LED lamp beads (23) to be detected by the photosensitive plate (25) after being refracted by the scattered light column (24), and judge the contact status of the key body (21); the infrared camera (13) and the coil block (15) capture the player's hand movement data; the integrated control board (14) comprehensively analyzes the force data, contact accuracy data and hand movement data to achieve accurate motion capture and interactive feedback.

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