Electric piano weighted keyboard with touch adjustment by zones

Abstract

The application discloses a weighted keyboard with touch feeling adjustment of electric piano, and relates to the technical field of electric piano, which comprises a piano shell and a touch feeling adjustment mechanism, wherein the touch feeling adjustment mechanism is movably connected to the outer wall of the piano shell in a hinge type through a pin shaft. The touch feeling adjustment mechanism is arranged to control the magnetic field superposition resistance of the weighted iron by delivering different currents in different zones, so that the key damping of high, low and medium sound zones can be independently adjusted, and the buffer cotton can buffer the collision to reduce the noise and prevent the damage of components. The lifting mechanism is arranged to drive the second sliding rod and the first sliding rod to synchronously lift and lower the coil base in different zones through electromagnetic attraction, so that the magnetic gap can be widely adjusted.

Description

Technical Field

[0001] This invention relates to the field of electric piano technology, specifically to a weighted keyboard for an electric piano with zoned touch adjustment. Background Technology

[0002] An electric piano is an electronic musical instrument that simulates the sound production principle of a traditional piano. It reproduces the sound and touch of a piano by sampling the timbre of a real piano or by physical modeling technology. It is usually equipped with a weighted or progressively weighted keyboard to mimic the mechanical resistance of a piano. It also has functions such as volume adjustment, headphone mute, multiple timbre switching and MIDI connection. Compared with a real piano, it is lighter, requires no tuning and is more affordable, making it suitable for home practice, stage performances or music production.

[0003] Traditional digital pianos rely solely on fixed counterweights for damping, with uniformly arranged coils that cannot be zoned for electromagnetic force application. They lack a layered buffer structure, making it easy for key impacts and vibrations to alter the magnetic gap. The feel of each zone is uniform and unadjustable, failing to simulate the differentiated weight distribution of a real piano and resulting in poor playability. Current counterweighted digital pianos rely solely on fixed counterweights to determine key damping, lacking a zoned electromagnetic control structure. Coil supports are mostly fixed assemblies, preventing zoned height adjustments. The magnetic gap cannot be changed after leaving the factory, making it difficult to specifically modify the feel of high and low notes. The gap is easily deformed by playing vibrations, resulting in poor feel consistency and an inability to achieve zoned touch adjustment as needed.

[0004] Finally: The existing adjustable coil lifting structure lacks a dedicated locking mechanism. After the base height is adjusted, the vibration generated by frequent keystrokes can easily cause the lifting component to loosen and shift, changing the magnetic gap between the coil and the moving magnet. Consequently, the electromagnetic force in each zone changes, and the key feel of the zoned adjustment gradually deviates. It is impossible to lock the adjustment parameters for a long time, and the stability of the zoned tactile adjustment effect is insufficient. The existing zoned coil base and lifting telescopic rod lack matching limiting and dustproof components. The exposed gaps between the components are prone to dust accumulation and jamming. Furthermore, there is no guide limiting structure. Playing vibrations can easily cause the coil base to shift laterally and the magnetic gap to be uneven. The electromagnetic force of the zoned area will deviate, and the adjusted zoned feel will easily change, making it difficult to stably achieve zoned tactile adjustment. Summary of the Invention

[0005] Therefore, in order to overcome the above-mentioned shortcomings, the present invention provides a weighted keyboard for an electric piano with zoned tactile adjustment.

[0006] The present invention is implemented by constructing a counterweighted keyboard for an electric piano with zoned tactile adjustment. The device includes a piano housing, and the outer wall of the piano housing is movably connected to a tactile adjustment mechanism via a pin hinge.

[0007] The tactile adjustment mechanism includes piano keys. The piano keys are movably connected to the outer wall of the piano shell by a hinge pin. A key rocker arm is installed at the bottom right end of the key. A counterweight is fixedly connected to the bottom of the key rocker arm. A cushioning foam is fixedly connected to the bottom of the counterweight. An electromagnetic moving magnet is fixedly connected to the bottom of the cushioning foam. A partitioned coil base is provided at the bottom of the inside of the piano shell. The bottom of the partitioned coil base is fixedly connected to the lifting mechanism.

[0008] Preferably, the lifting mechanism includes a first sliding rod, the bottom left end of the partitioned coil base is fixedly connected to the first sliding rod, the bottom of the first sliding rod is fixedly connected to a locking mechanism, the outer wall of the first sliding rod is slidably connected to the inside of the second mounting rod, the bottom right end of the partitioned coil base is threadedly locked to the protective mechanism, the bottom of the protective mechanism is fixedly connected to a second sliding rod, the second sliding rod is magnetically attracted to the electromagnetic block, and there are six sets of electromagnetic blocks, the electromagnetic block is fixedly connected to the inside of the third mounting rod.

[0009] Preferably, the locking mechanism includes a toothed plate, the bottom of the first sliding rod is fixedly connected to the toothed plate, the left end of the toothed plate is engaged with a gear, the front end of the gear is fixedly connected to a turntable through a gear rod, the front edge of the turntable is provided with eight sets of slots, the slots are inserted and fixedly connected to the insert block, the front end of the insert block is fixedly connected to a moving rod, the front end of the moving rod is fixedly connected to a spring, and the spring is fixedly connected to the front end of the inside of the first mounting rod.

[0010] Preferably, the protective mechanism includes a limiting pressure ring, the bottom right end of the partition coil base is threadedly locked and fixed to the limiting pressure ring, an elastic dustproof ring is fitted on the outer wall of the limiting pressure ring, a guide pin is snapped at the bottom of the limiting pressure ring and the elastic dustproof ring, and a stop washer is installed at the bottom of the guide pin.

[0011] Preferably, an electromagnetic winding coil is fixedly connected inside the partitioned coil base. The electromagnetic winding coil is wound in sections according to the high-frequency range, mid-frequency range, and low-frequency range. The partitioned coil base is provided with terminals. The inner cavity of the partitioned coil base is equipped with an iron core and an enameled coil, which is used to generate the magnetic field required for partitioned control.

[0012] Preferably, a PCB board is installed inside the piano shell, which is connected to the base of the bass, midrange and treble three-section coils through leads. The coils output adjustable voltage and current separately to change the magnetic field of the coils and control the force on the electromagnetic moving magnet to achieve zoned touch.

[0013] Preferably, the electromagnetic block is electrically connected to an external current output device, the top of the third mounting rod is slidably connected to the outer wall of the second sliding rod, and the bottoms of both the second and third mounting rods are fixedly connected to the inside of the piano housing.

[0014] Preferably, the front end of the first mounting rod is fixedly connected to the inner front end of the second mounting rod, and the outer wall of the movable rod is slidably connected to the first mounting rod.

[0015] Preferably, the back of the gear is rotatably connected to the rear end of the second mounting rod via a gear rod, and the back of the gear plate is slidably connected to the rear end of the second mounting rod.

[0016] Preferably, the bottom of the stop pad is fixedly connected to the top of the second sliding rod.

[0017] The present invention has the following advantages: The present invention provides an electric piano weighted keyboard with zoned tactile adjustment, which, compared with similar devices, has the following improvements:

[0018] This invention discloses a digital piano counterweight keyboard with zoned tactile adjustment. It includes a tactile adjustment mechanism that uses different currents to control the magnetic field of coils, superimposed with the resistance of counterweights, to achieve independent adjustment of key damping for high, low, and mid-range notes. Buffer foam cushions impacts, reduces noise, and prevents component damage. A lifting mechanism uses electromagnetic attraction to drive the second and first sliding rods to simultaneously raise and lower the zoned coil base, allowing for a wide range of magnetic gap adjustment. A locking mechanism uses a spring-driven insert to lock the turntable, ensuring a secure and fixed height of the zoned coil base after adjustment, preventing base sagging and changes in feel caused by playing vibrations. A protective mechanism uses dustproof seals and axial limiting structures to prevent dust, jamming, and excessive lateral movement of the zoned coil base, ensuring long-term stability of the magnetic gap and zoned playing feel. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal three-dimensional structure of the piano shell of the present invention;

[0021] Figure 3 This is the present invention. Figure 2 Enlarged structural diagram at point A;

[0022] Figure 4 This is a three-dimensional exploded view of the lifting mechanism of the present invention;

[0023] Figure 5 This is a three-dimensional exploded view of the locking mechanism of the present invention;

[0024] Figure 6 This is a three-dimensional structural diagram of the protective mechanism of the present invention.

[0025] The components include: piano shell-1, touch adjustment mechanism-2, piano keys-21, key swing arm-22, counterweight-23, cushioning foam-24, electromagnetic moving magnet-25, zoned coil base-26, lifting mechanism-27, first sliding rod-271, locking mechanism-272, toothed plate-2721, gear-2722, turntable-2723, slot-2724, insert block-2725, moving rod-2726, spring-2727, first mounting rod-2728, second mounting rod-273, protective mechanism-274, limit pressure ring-2741, elastic dustproof ring-2742, guide pin-2743, stop washer-2744, second sliding rod-275, electromagnetic block-276, and third mounting rod-277. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-6 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the 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.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The embodiments of this invention will now be described according to its overall structure.

[0029] Example 1:

[0030] Please see Figures 1-3The present invention provides a counterweight keyboard for an electric piano with zoned tactile adjustment, comprising a piano housing 1, wherein a tactile adjustment mechanism 2 is movably connected to the outer wall of the piano housing 1 by a hinge pin.

[0031] The touch adjustment mechanism 2 includes piano keys 21. A pin is mounted on the side of the piano housing 1, which hinges the keys 21 to the housing. The pin allows the keys 21 to move up and down. The end of the keys 21 is connected to a key lever 22. Pressing the keys 21 will cause the key lever 22 to rise and fall synchronously. A counterweight 23 is mounted at the lower end of the key lever 22. The weight of the counterweight 23 provides the basic downward pressure on the keys. A cushioning foam 24 is glued to the bottom of the counterweight 23. When the keys fall, the cushioning foam 24 cushions the impact and prevents bumps and abnormal noises. An electromagnetic moving magnet 25 is fixed to the bottom of the cushioning foam 24. The electromagnetic moving magnet 25 is pulled by the magnetic force of the coil to change the resistance of the keys. A series of components are installed on the bottom inner side of the piano housing 1. The partitioned coil base 26 is used to house the coils and align them with the upper electromagnetic moving magnet 25. The lower end of the partitioned coil base 26 is connected to a lifting mechanism 27, which can move the partitioned coil base 26 up and down to change the spacing. High and mid-low frequency electromagnetic winding coils are wound in sections inside the partitioned coil base 26, and the segmented coils can generate magnetic fields separately in each section. The coils have reserved wiring terminals for easy connection to power supply. The inner cavity of the partitioned coil base 26 is equipped with an iron core and enameled coils. The iron core is used to concentrate the magnetic field and increase the magnetic strength. A PCB board is laid inside the housing. The PCB board supplies different currents to each zone coil, and the strength of the magnetic field is adjusted by the magnitude of the current.

[0032] The working principle of a digital piano weighted keyboard with zoned tactile adjustment based on Embodiment 1 is as follows:

[0033] When using this device, first place it in the work area, then connect it to an external power source to provide the power required for its operation.

[0034] When the user presses the key 21, the key 21 swings in a seesaw-like manner at the hinge point with the piano shell 1. When the key 21 is pressed down, it drives the key lever 22 to move downward in sync. The counterweight 23 sinks down with the key lever 22. The counterweight 23 forms the basic downward resistance by its own weight, which constitutes the original counterweight feel of the keyboard. The cushioning foam 24 buffers the impact force of the falling and prevents the electromagnetic moving magnet 25 from hitting the partition coil base 26 and causing abnormal noise and deformation. The PCB board supplies different parameters of current and voltage to the electromagnetic winding coil inside the partition coil base 26 according to the high, mid and low frequencies. After the segmented winding coil is energized, it generates a magnetic field of corresponding strength based on the internal iron core. The magnetic field forms a magnetic attraction force on the electromagnetic moving magnet 25 directly above. The attraction force is superimposed on the self-weight resistance of the counterweight 23, which changes the key pressure of the key 21 in a single frequency zone. The magnitude of the input current is changed to adjust the magnetic field attraction force, so as to realize independent adjustment of the playing feel of the high, mid and low frequencies.

[0035] Example 2:

[0036] Please see Figure 4 The present invention provides a digital piano counterweight keyboard with zoned tactile adjustment. Compared with Embodiment 1, this embodiment further includes: a lifting mechanism 27, which includes a first sliding rod 271. The lower left end of the zoned coil base 26 is fixed to the first sliding rod 271, and the first sliding rod 271 moves up and down synchronously with the zoned coil base 26; a locking mechanism 272 is added to the bottom end of the first sliding rod 271, and after the height is adjusted, the locking mechanism 272 locks the rod to prevent displacement; the first sliding rod 271 is fitted inside a second mounting rod 273, and the second mounting rod 273 restricts the first sliding rod 271 to slide only vertically; a protective mechanism 274 is threadedly fixed to the lower right end of the zoned coil base 26, and the protective mechanism 274 connects to the rod and simultaneously prevents dust and limits movement; the protective mechanism 274... The lower end of 74 is fixed to the second sliding rod 275. The second sliding rod 275 is magnetically pulled to drive the right end of the partition coil base 26 to rise and fall. Multiple sets of electromagnetic blocks 276 are magnetically attached to the second sliding rod 275. When the electromagnetic blocks 276 are energized, they can pull the second sliding rod 275 to rise and fall. All six sets of electromagnetic blocks 276 are fixed in the third mounting rod 277. The third mounting rod 277 fixes the position of the electromagnetic blocks 276 so that they do not wobble. The electromagnetic blocks 276 are connected to an external current output device. The power is turned on and off to control the generation or elimination of magnetism of the electromagnetic blocks 276. The second sliding rod 275 passes through the upper end of the third mounting rod 277. The third mounting rod 277 limits the vertical sliding trajectory of the second sliding rod 275. The second mounting rod 273 and the third mounting rod 277 are all fixed inside the piano shell 1.

[0037] In this embodiment:

[0038] When the magnetic gap range needs to be adjusted to change the zone feel, the six sets of electromagnetic blocks 276 are energized and de-energized respectively through an external current output device. The electromagnetic blocks 276 generate magnetism and attract the second sliding rod 275. Under the magnetic attraction, the second sliding rod 275 slides vertically along the inner wall of the third mounting rod 277. The second sliding rod 275 drives the right end of the zone coil base 26 to rise and fall through the upper protective mechanism 274. At the same time, the first sliding rod 271 connected to the left end of the zone coil base 26 slides synchronously along the inside of the second mounting rod 273. The synchronous rise and fall of the two rods drives the entire zone coil base 26 to move up and down, changing the magnetic gap between the zone coil base 26 and the upper electromagnetic moving magnet 25. The change in magnetic gap directly changes the magnitude of the attraction force of the coil magnetic field on the electromagnetic moving magnet 25. Combined with the zone energization control, the adjustment of the weight feel of each zone is completed.

[0039] Example 3:

[0040] Please see Figure 5The present invention provides a digital piano counterweight keyboard with zoned tactile adjustment. Compared with Embodiment 1, this embodiment further includes: a locking mechanism 272, which includes a toothed plate 2721. The lower end of the first sliding rod 271 is fixed to the toothed plate 2721, and the sliding rod's rise and fall directly causes the toothed plate 2721 to move up and down synchronously. The side of the toothed plate 2721 meshes with a gear 2722, and the movement of the toothed plate 2721 relies on the meshing of the teeth to drive the gear 2722 to rotate. The front end of the gear 2722 is connected to a turntable 2723 through a gear rod, and the rotation of the gear 2722 synchronously drives the turntable 2723 to rotate together. Eight sets of slots 2724 are provided on the end face of the turntable 2723. The slots 2724 are used to lock the insert block 2725 to achieve position locking. The insert block 2725 can be inserted into the slot 2724, and the insert block 2725 locks... Inserting the insert into slot 2724 locks the turntable 2723, preventing it from rotating. The front end of the insert block 2725 is connected to a moving rod 2726. Pulling the moving rod 2726 can cause the insert block 2725 to disengage from the slot and unlock. A spring 2727 is fixed to the end of the moving rod 2726. The spring 2727 rebounds and pushes the insert block 2725 to automatically engage in the slot. The other end of the spring 2727 is fixed to the inside of the first mounting rod 2728. The first mounting rod 2728 is fixed to the inside of the second mounting rod 273. The moving rod 2726 passes through the inner cavity of the first mounting rod 2728. The rear end of the gear 2722 is mounted in the second mounting rod 273 by the rotation of the gear rod, providing a fulcrum for the gear 2722. The back of the toothed plate 2721 is attached to the inner wall of the second mounting rod 273. The second mounting rod 273 restricts the toothed plate 2721 to slide vertically only.

[0041] In this embodiment:

[0042] During the movement of the partitioned coil base 26, the first sliding rod 271 drives the toothed plate 2721 to move up or down. The toothed plate 2721 drives the gear 2722 to rotate. The gear 2722 drives the turntable 2723 to rotate through the gear rod. The turntable 2723 drives the slot 2724 to make a circular motion. At this time, the insert block 2725 and the moving rod 2726 are affected by the contact with the turntable 2723 and the slot 2724 and cooperate with the spring 2727 to make a telescopic movement. When the partitioned coil base 26 is adjusted to the appropriate position, the insert block 2725 is affected by the spring 2727 and gets into a slot 2724 nearby to lock the turntable 2723. The gear 2722 then stops rotating and locks the toothed plate 2721, locking the adjustment height of the partitioned coil base 26 and preventing the partitioned coil base 26 from sinking and shifting due to the vibration of playing.

[0043] Example 4:

[0044] Please see Figure 6The present invention provides a digital piano counterweight keyboard with zoned tactile adjustment. Compared with Embodiment 1, this embodiment further includes: a protective mechanism 274, which includes a limiting pressure ring 2741. The limiting pressure ring 2741 is threadedly tightened to the lower right end of the zoned coil base 26. The limiting pressure ring 2741 serves as an intermediate connector connecting the base and the lower part. An elastic dustproof ring 2742 is inserted into the outer ring groove of the limiting pressure ring 2741. The elastic dustproof ring 2742 seals the gaps and prevents dust from entering the interior. A guide pin 2743 is snapped onto the lower side of the limiting pressure ring 2741. The guide pin 2743 restricts the limiting pressure ring 2741 to move only vertically and prevents it from deviating to the left or right. A stop washer 2744 is fitted onto the lower end of the guide pin 2743. The stop washer 2744 prevents the guide pin from moving too far downward and avoids the zoned coil base 26 from being bumped. The bottom surface of the stop washer 2744 is fixed to the top of the second sliding rod 275.

[0045] In this embodiment:

[0046] The limiting ring 2741 is fastened to the bottom right end of the partition coil base 26. The elastic dustproof ring 2742 seals the limiting ring 2741 to prevent dust accumulation from hindering the lifting and lowering action. At the same time, during the lifting and lowering process of the partition coil base 26 following the second sliding rod 275, the guide pin 2743 constrains the vertical displacement of the limiting ring 2741, limiting the lateral displacement of the partition coil base 26. The stop shim 2744 limits the maximum downward stroke of the guide pin 2743 to avoid excessive movement of the partition coil base 26, which would cause the magnetic gap to return to zero and collide with the electromagnetic moving magnetic sheet 25. This stabilizes the distance between the coil and the electromagnetic moving magnetic sheet 25, ensuring that the partition adjustment feel does not deviate in the long term.

[0047] This invention provides an improved digital piano counterweight keyboard with zoned tactile adjustment. It includes a tactile adjustment mechanism 2, which uses different currents to adjust the magnetic field of the coils and the resistance of the counterweight 23, allowing independent adjustment of key damping for high, low, and mid-range notes. A cushioning foam 24 buffers impacts, reduces noise, and prevents component damage. A lifting mechanism 27 uses electromagnetic attraction to drive the second sliding rod 275 and the first sliding rod 271 to simultaneously raise and lower the zoned coil base 26, enabling a wide range of magnetic gap adjustment. A locking mechanism 272 uses a spring 2727 to drive the insert 2725 into the slot 2724 to lock the turntable 2723, ensuring a secure and fixed height of the zoned coil base 26 after adjustment, preventing base sinking and tactile changes caused by playing vibrations. A protective mechanism 274 uses a dustproof seal and axial limiting structure to prevent dust, jamming, and excessive lateral movement of the zoned coil base 26, ensuring long-term stability of the magnetic gap and zoned playing feel.

[0048] The above description shows and illustrates the basic principles, main features, and advantages of the present invention. Standard parts used in the present invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts, and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A digital piano counterweight keyboard with zoned tactile adjustment, comprising a piano housing (1), wherein a tactile adjustment mechanism (2) is movably connected to the outer wall of the piano housing (1) by a hinge pin. characterized in that The tactile adjustment mechanism (2) includes piano keys (21). The piano keys (21) are movably connected to the outer wall of the piano shell (1) by a hinge pin. A key rocker arm (22) is installed at the bottom right end of the piano keys (21). A counterweight (23) is fixedly connected to the bottom of the key rocker arm (22). A cushioning foam (24) is fixedly connected to the bottom of the counterweight (23). An electromagnetic moving magnet (25) is fixedly connected to the bottom of the cushioning foam (24). A partitioned coil base (26) is provided at the bottom of the interior of the piano shell (1). The bottom of the partitioned coil base (26) is fixedly connected to the lifting mechanism (27). Next, an electromagnetic winding coil is fixedly connected inside the partitioned coil base (26). The electromagnetic winding coil is wound in sections according to the high, middle and low frequencies. The partitioned coil base (26) is provided with terminals. The inner cavity of the partitioned coil base (26) is equipped with an iron core and an enameled coil, which is used to generate the magnetic field required for partitioned control. The piano shell (1) is equipped with a PCB board, which is connected to the three partitioned coil bases (26) of the low, middle and high frequencies respectively through leads. The adjustable voltage and current are output separately to change the magnetic field of the coil and control the force on the electromagnetic moving magnet (25) to achieve partitioned touch. The lifting mechanism (27) includes a first sliding rod (271). The bottom left end of the partition coil base (26) is fixedly connected to the first sliding rod (271). The bottom of the first sliding rod (271) is fixedly connected to a locking mechanism (272). The outer wall of the first sliding rod (271) is slidably connected to the inside of the second mounting rod (273). The bottom right end of the partition coil base (26) is threadedly locked to the protective mechanism (274). The bottom of the protective mechanism (274) is fixedly connected to a second sliding rod (275). The second sliding rod (275) is magnetically attracted to the electromagnetic block (276), and the electromagnetic block (276) is provided in six groups. The electromagnetic block (276) is fixedly connected to the inside of the third mounting rod (277).

2. The weighted keyboard of claim 1, wherein: The locking mechanism (272) includes a toothed plate (2721). The toothed plate (2721) is fixedly connected to the bottom of the first sliding rod (271). A gear (2722) meshes with the left end of the toothed plate (2721). A turntable (2723) is fixedly connected to the front end of the gear (2722) through a gear rod. Eight sets of slots (2724) are provided at the front edge of the turntable (2723). The slots (2724) are inserted and fixedly connected to the insert block (2725). A moving rod (2726) is fixedly connected to the front end of the insert block (2725). A spring (2727) is fixedly connected to the front end of the moving rod (2726). The spring (2727) is fixedly connected to the front end of the first mounting rod (2728).

3. The weighted keyboard of claim 2, wherein: The protective mechanism (274) includes a limiting pressure ring (2741). The bottom right end of the partition coil base (26) is threadedly locked and fixed to the limiting pressure ring (2741). An elastic dustproof ring (2742) is fitted on the outer wall of the limiting pressure ring (2741). A guide pin (2743) is snapped at the bottom of the limiting pressure ring (2741) and the elastic dustproof ring (2742). A stop washer (2744) is installed at the bottom of the guide pin (2743).

4. The digital piano weighted keyboard with zoned tactile adjustment according to claim 3, characterized in that: The electromagnetic block (276) is electrically connected to an external current output device. The top of the third mounting rod (277) is slidably connected to the outer wall of the second sliding rod (275). The bottoms of the second mounting rod (273) and the third mounting rod (277) are both fixedly connected to the inside of the piano shell (1).

5. The digital piano weighted keyboard with zoned tactile adjustment according to claim 4, characterized in that: The front end of the first mounting rod (2728) is fixedly connected to the inner front end of the second mounting rod (273), and the outer wall of the movable rod (2726) is slidably connected to the first mounting rod (2728).

6. The digital piano weighted keyboard with zoned tactile adjustment according to claim 5, characterized in that: The back of the gear (2722) is rotatably connected to the rear end of the second mounting rod (273) via a gear rod, and the back of the toothed plate (2721) is slidably connected to the rear end of the second mounting rod (273).

7. The digital piano weighted keyboard with zoned tactile adjustment according to claim 6, characterized in that: The bottom of the stop pad (2744) is fixedly connected to the top of the second sliding rod (275).

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