Folding piano structure design with damping sensing rotating shaft and magnetic attraction function
By adopting a damped rotating shaft and magnetic folding structure design on the electronic keyboard, the safety hazards of folding or unfolding the electronic keyboard are solved, and the smooth operation and stable adsorption of the keyboard body are achieved, improving safety and convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-13
AI Technical Summary
Existing foldable electronic keyboards lack damping or restoring force in their folding structure, causing the keyboard to easily rotate suddenly when folded or unfolded, posing a safety hazard and the risk of pinching fingers.
The piano features a folding structure with a damped rotating shaft and magnetic attraction. It has two sets of rotating structures, with the mounting plate in each set fixed to the piano body. The rotating shaft and the torsion spring are connected to the mounting shell and rotate together. Combined with magnetic components, it achieves stable attraction and ensures that the piano body is stable and controllable during folding.
It improves the safety and stability of the electronic keyboard, reduces the risk of pinching fingers, enhances ease of use and operating experience, and extends the lifespan of connecting lines and components.
Smart Images
Figure CN121662003A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of musical instruments, and in particular to a structural design for a folding piano with a damped rotating shaft and magnetic attraction function. Background Technology
[0002] With the increasing popularity of electronic musical instruments, various foldable portable electronic keyboards have emerged on the market to meet users' needs for space saving and convenient portability. However, many of these products currently on the market have relatively simple folding structures, and their connecting shafts often lack the necessary damping or restoring force. This design has obvious drawbacks in actual use: when the user folds or unfolds the keyboard, the lack of torsional support makes it prone to sudden and uncontrollable rotation. This could not only lead to the keyboard accidentally slipping and being damaged, but also pose a safety hazard of pinching the user's fingers. Summary of the Invention
[0003] The main objective of this invention is to propose a folding piano structure design with a damped rotating shaft and magnetic attraction function, which aims to facilitate the folding of the electronic keyboard and improve its safety and stability.
[0004] To achieve the above objectives, the present invention proposes a folding piano structure design with a damped rotating shaft and magnetic attraction function, comprising: The instrument body includes a first instrument body and a second instrument body; At least one set of rotating structures, each set of rotating structures including two mounting plates, two rotating shafts, and two torque springs, with one mounting plate corresponding to one rotating shaft and one torque spring. One end of each rotating shaft is fixed to a mounting plate, and the torque spring is fixed to the outer periphery of the rotating shaft. The two mounting plates of the same set of rotating structures are respectively fixed to the first instrument body and the second instrument body, and the two sets of rotating structures are arranged opposite to each other. The mounting shell has a mounting cavity formed inside, and multiple rotating shafts are rotatably connected to the mounting cavity so that the first instrument body and the second instrument body are rotatably connected.
[0005] In one embodiment, each set of rotating structures further includes a shaft sleeve, each shaft sleeve having two mounting through holes, and the two rotating shafts of the same set of rotating structures being rotatably connected to the corresponding mounting through holes, with the mounting shell fitted and fixed to the outer periphery of the two shaft sleeves.
[0006] In one embodiment, the rotating structure further includes a rotating plate, the rotating plate having a first limiting part, the shaft sleeve having a second limiting part, and a rotating plate fixedly connected to one rotating shaft. When the first instrument body rotates at a predetermined angle relative to the second instrument body, the first limiting part and the second limiting part limit and abut against each other.
[0007] In one embodiment, the first limiting part is a limiting groove, and the second limiting part is a limiting protrusion. When the first instrument body rotates at a predetermined angle relative to the second instrument body, the limiting protrusion abuts against the groove wall of the limiting groove.
[0008] In one embodiment, each set of rotating structures includes two driving gears, two transmission gears, and a gear plate. The two driving gears and the two transmission gears are rotatably connected to the gear plate. One rotating shaft corresponds to one driving gear and one transmission gear. The driving gear is fixedly connected to the corresponding rotating shaft, and the driving gear and the transmission gear corresponding to the same rotating shaft are meshed. The two transmission gears of the same set of rotating structures are meshed, so that when the first instrument body rotates, it will drive the second instrument body to rotate synchronously.
[0009] In one embodiment, the mounting shell has a storage cavity, and the mounting shell has two wire holes that communicate with the storage cavity. The connecting wires between the first instrument body and the second instrument body pass through the corresponding wire holes to make the first instrument body and the second instrument body electrically connected. The connecting wires between the first instrument body and the second instrument body are stored in the storage cavity to hide the connection between the first instrument body and the second instrument body.
[0010] In one embodiment, the mounting plate is provided with a first mounting part, and both the first instrument body and the second instrument body are provided with a second mounting part. The mounting plate is detachably connected to the corresponding first instrument body or second instrument body through the first mounting part and the second mounting part.
[0011] In one embodiment, the first mounting part is a first mounting hole, the second mounting part is a second mounting hole, and the mounting plate is locked to the corresponding first or second piano body through the cooperation of the first mounting hole, the second mounting hole and screws.
[0012] In one embodiment, the system further includes a plurality of cover plates, which are detachably connected to the first instrument body and the second instrument body, and the cover plates are disposed on the corresponding mounting plates.
[0013] In one embodiment, one of the first and second bodies of the instrument is provided with a first magnetic element, and the other is provided with an iron block. When the first and second bodies of the instrument are in an unfolded state, the first magnetic element and the iron block are magnetically attracted to each other; or One of the first and second piano bodies is provided with a first magnetic component, and the other is provided with a second magnetic component. When the first and second piano bodies are in the unfolded state, the first and second magnetic components are magnetically attracted to each other.
[0014] The technical solution of this invention involves setting up two sets of opposing rotating structures, with the mounting plates in each set fixed to the first and second bodies of the keyboard, respectively. Simultaneously, two rotating shafts with fixed torque springs are rotatably connected within an independent mounting shell, thus constructing a stable and reliable folding hub. This completely solves the safety hazards of traditional folding keyboards. The continuous damping generated by the torque springs as they rotate with the shafts effectively prevents the keyboard from suddenly and rapidly closing or unfolding due to its own weight during folding, making the entire operation smooth and controllable, thereby reducing the risk of pinching the user's fingers and improving the safety and stability of the electronic keyboard. Furthermore, the torque springs can achieve a hovering function at any angle. The torque and the keyboard's weight torque are balanced, allowing the user to stabilize the keyboard at the desired angle without additional force, greatly improving ease of use and user experience. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0016] Figure 1 A schematic diagram of the unfolded state of the folding piano structure design with damped rotating shaft and magnetic attraction function provided by the present invention. Figure 2 for Figure 1 A schematic diagram of the structure in the folded state; Figure 3 for Figure 1 Exploded view; Figure 4 for Figure 1 A schematic diagram of the rotating structure in Embodiment 1; Figure 5 for Figure 4 Exploded view; Figure 6 for Figure 4 A cross-sectional view from a central perspective; Figure 7 for Figure 5 Schematic diagram of the central core sleeve; Figure 8 for Figure 1A schematic diagram of the rotating structure in embodiment two; Figure 9 for Figure 8 Exploded view; Figure 10 for Figure 8 A sectional view of the middle section of the structure; Figure 11 for Figure 1 Exploded view of an electronic keyboard equipped with magnetic components; Figure 12 for Figure 11 A schematic diagram of the structure of the second body of the instrument; Figure 13 for Figure 11 A schematic diagram showing the result when the electronic keyboard is unfolded.
[0017] Explanation of icon numbers: 11. First body; 12. Second body; 13. Second mounting hole; 14. Receiving groove; 20. Rotating structure; 21. Mounting plate; 211. First mounting hole; 22. Rotating shaft; 23. Torque spring; 24. Shaft sleeve; 241. Mounting through hole; 242. Limiting protrusion; 25. Rotating piece; 251. Limiting groove; 261. Drive gear; 262. Transmission gear; 263. Gear plate; 31. Mounting shell; 311. Wire hole; 32. Cover plate; 41. First magnetic component; 42. Iron block; 43. Button.
[0018] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.
[0020] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0021] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.
[0022] Reference Figure 1 , Figure 2 as well as Figure 5 This invention proposes a folding piano structural design with a damped rotating shaft and magnetic attraction function, comprising: The instrument body includes a first instrument body 11 and a second instrument body 12; At least one set of rotating structures 20, each set of rotating structures 20 including two mounting plates 21, two rotating shafts 22, and two torque springs 23. One mounting plate 21 is corresponding to one rotating shaft 22 and one torque spring 23. One end of the rotating shaft 22 is fixed to the mounting plate 21, and the torque spring 23 is fixed to the outer periphery of the rotating shaft 22. The two mounting plates 21 of the same set of rotating structures 20 are respectively fixed to the first instrument body 11 and the second instrument body 12, and the two sets of rotating structures 20 are arranged opposite to each other. Mounting housing 31, wherein a mounting cavity is formed inside the mounting housing 31, and a plurality of rotating shafts 22 are rotatably connected to the mounting cavity so that the first instrument body 11 and the second instrument body 12 are rotatably connected.
[0023] In this invention, two sets of opposing rotating structures 20 are set up, and the mounting plates 21 in each set are fixed to the first piano body 11 and the second piano body 12 respectively. Simultaneously, two rotating shafts 22 with fixed torque springs 23 are rotatably connected within an independent mounting shell 31, thus constructing a stable and reliable folding hub. This completely solves the safety hazards of traditional folding pianos. The continuous damping generated by the torque springs 23 as they rotate with the shaft effectively prevents the piano body from suddenly and rapidly closing or unfolding due to its own weight during folding, making the entire action smooth and controllable, thereby reducing the risk of pinching the user's fingers and improving the safety and stability of the electronic keyboard. Furthermore, the torque springs 23 can achieve the function of hovering at any angle. The torque and the piano's weight torque are balanced, allowing the user to stabilize the piano body at the desired angle without additional force, greatly improving the convenience and experience of use.
[0024] Reference Figures 4 to 7 In Embodiment 1, each set of rotating structures 20 further includes a shaft sleeve 24. Each shaft sleeve 24 has two mounting through holes 241. The two rotating shafts 22 of the same set of rotating structures 20 are rotatably connected to the corresponding mounting through holes 241. The mounting shell 31 is fitted and fixed to the outer periphery of the two shaft sleeves 24. The shaft sleeve 24 greatly optimizes the assembly process. The two rotating shafts 22 are pre-installed and calibrated in an independent shaft sleeve 24, forming a standard, high-precision sub-module. This makes subsequent assembly with the mounting shell 31 simple and quick, effectively improving production efficiency and product consistency. Secondly, the shaft sleeve 24, as a structural reinforcement, connects the two independent rotating shafts 22 into a whole, enhancing the rigidity and stability of the entire rotating structure 20. It can better withstand the torsional load from the instrument body, preventing loosening or deformation after long-term use, thereby improving the durability and reliability of the product.
[0025] Furthermore, the rotating structure 20 also includes a rotating plate 25, which has a first limiting part and a second limiting part on the shaft sleeve 24. One rotating shaft 22 is fixedly connected to one rotating plate 25. When the first instrument body 11 rotates relative to the second instrument body 12 by a predetermined angle, the first limiting part and the second limiting part abut against each other. When the first instrument body 11 rotates relative to the second instrument body 12 to a predetermined angle (such as a fully unfolded or fully folded position), the first limiting part on the rotating plate 25 and the second limiting part on the shaft sleeve 24 reliably abut against each other, forming a hard stop. This mechanical limiting structure effectively prevents users from damaging internal precision components such as the torque spring 23 and the rotating shaft 22 due to excessive rotation, greatly improving the product's safety and service life. Simultaneously, it provides clear tactile feedback to the user during operation, allowing the user to clearly perceive the endpoint position, enhancing the certainty and quality of the operating experience.
[0026] The predetermined angle is set according to the user's actual needs. The first instrument body 11 and the second instrument body 12 have an unfolded state and a folded state. In the unfolded state, the first instrument body 11 and the second instrument body 12 are located on the same straight line; in the folded state, the first instrument body 11 and the second instrument body 12 are stacked, that is, the first instrument body 11 and the second instrument body 12 are equivalent to rotating 180° from the unfolded state. Therefore, the predetermined angle can be 90°, that is, first rotate one of the first instrument body 11 and the second instrument body 12 by 90°, and then rotate the other 90°, so that the first instrument body 11 and the second instrument body 12 change from the unfolded state to the folded state. Of course, in other embodiments, the predetermined angle can also be 30°, 60°, 120°, 80°, etc.
[0027] Specifically, the first limiting part is a limiting groove 251, and the second limiting part is a limiting protrusion 242. When the first instrument body 11 rotates relative to the second instrument body 12 by a predetermined angle, the limiting protrusion 242 abuts against the groove wall of the limiting groove 251. The limiting protrusion 242 and the limiting groove 251 have a simple structure, are easy to manufacture, and are inexpensive, while also being extremely reliable in operation. The surface contact between the limiting protrusion 242 and the groove wall of the limiting groove 251 results in a larger and more uniform force-bearing area during limiting abutment, avoiding stress concentration and thus improving the durability of the limiting structure.
[0028] Reference Figures 8 to 10In Embodiment Two, each set of rotating structures 20 includes two driving gears 261, two transmission gears 262, and a gear plate 263. The two driving gears 261 and two transmission gears 262 are rotatably connected to the gear plate 263. One rotating shaft 22 corresponds to one driving gear 261 and one transmission gear 262. The driving gear 261 is fixedly connected to the corresponding rotating shaft 22, and the driving gear 261 and transmission gear 262 corresponding to the same rotating shaft 22 are meshed. The two transmission gears 262 of the same set of rotating structures 20 are meshed, so that when the first instrument body 11 rotates, it drives the second instrument body 12 to rotate synchronously. By setting the driving gears 261 and transmission gears 262, it is ensured that the first instrument body 11 and the second instrument body 12 can achieve completely synchronous opposite rotation during folding or unfolding. This means that regardless of whether the user operates the first instrument body 11 or the second instrument body 12, the other will move in the opposite direction with the exact same angular velocity. This feature makes the folding operation extremely smooth, effortless, and elegant, completely avoiding the risks of jamming, interference, or cable damage that may occur due to asynchronous rotation of the two instrument bodies. It not only greatly improves operational convenience, but more importantly, through precise control of the movement trajectory, it further protects the internal wiring and rotating components, enhancing the overall reliability of the product.
[0029] Reference Figures 1 to 3 Specifically, the mounting shell 31 has a storage cavity, and the mounting shell 31 has two wire-passing holes 311 that communicate with the storage cavity. The connecting wires between the first instrument body 11 and the second instrument body 12 pass through the corresponding wire-passing holes 311 to electrically connect the first instrument body 11 and the second instrument body 12. The connecting wires between the first instrument body 11 and the second instrument body 12 are stored in the storage cavity to hide the connection between the first instrument body 11 and the second instrument body 12. The wire-passing holes 311 and the storage cavity provide a dedicated and protected channel for the connecting wires (such as power cords, data signal lines, etc.) passing between the first instrument body 11 and the second instrument body 12. This design effectively prevents the wires from being squeezed, worn, or even torn during repeated rotation and folding of the instrument body, greatly extending the service life of the wires and reducing the risk of product failure due to wire damage.
[0030] In one embodiment, the mounting plate 21 is provided with a first mounting part, and both the first instrument body 11 and the second instrument body 12 are provided with a second mounting part. The mounting plate 21 is detachably connected to the corresponding first instrument body 11 or second instrument body 12 through the first mounting part and the second mounting part. This greatly facilitates the production, maintenance, and repair of the product. During the production stage, each component can be manufactured and inspected independently, and then quickly assembled, improving production efficiency. When the rotating structure 20 malfunctions or requires maintenance, maintenance personnel do not need to disassemble the entire instrument body; they only need to remove the corresponding mounting plate 21 to expose the entire rotating module, thus facilitating subsequent maintenance.
[0031] Specifically, the first mounting part is a first mounting hole 211, and the second mounting part is a second mounting hole 13. The mounting plate 21 is secured to the corresponding first instrument body 11 or second instrument body 12 through the cooperation of the first mounting hole 211, the second mounting hole 13, and screws. Screw connection is a mature and standardized mechanical connection method, with significant advantages such as strong connection, high reliability, low cost, and easy assembly and disassembly. It can withstand large loads, ensuring that the mounting plate 21 and the instrument body will not loosen under long-term use and repeated folding vibrations. At the same time, assembly and disassembly can be easily completed using standard tools, providing great convenience for production line assembly and subsequent on-site maintenance.
[0032] Furthermore, it also includes multiple cover plates 32, which are detachably connected to the first keyboard body 11 and the second keyboard body 12, respectively, and each cover plate 32 covers the corresponding mounting plate 21. By providing detachable cover plates 32 that cover the outside of the mounting plate 21, it brings dual benefits in terms of functionality and aesthetics. Functionally, the cover plate 32 acts as a protective cover, effectively preventing dust, impurities, etc., from entering the precision rotating structure 20, avoiding contamination or jamming of the torque spring 23 and the rotating shaft 22, and ensuring the long-term reliability of the mechanism. In terms of aesthetics and safety, the cover plate 32 can completely hide the mechanical parts, making the electronic keyboard look neat and beautiful when unfolded, enhancing the overall quality of the product. At the same time, it also prevents users from directly contacting the internal moving parts, providing additional safety protection.
[0033] Furthermore, a receiving groove 14 is formed between the first instrument body 11 and the second instrument body 12, and the rotating structure 20 and the mounting shell 31 are both located within the receiving groove 14. The receiving groove 14 allows the first instrument body 11 and the second instrument body 12 to have a smaller overall volume after folding, making them easier to store and carry. The structure of the receiving groove 14 also provides natural physical protection for the internal rotating mechanism, making it less susceptible to external impacts and damage.
[0034] Reference Figures 11 to 13In one embodiment, one of the first instrument body 11 and the second instrument body 12 is provided with a first magnetic element 41, and the other is provided with an iron block 42. When the first instrument body 11 and the second instrument body 12 are in the unfolded state, the first magnetic element 41 and the iron block 42 are magnetically attracted to each other.
[0035] In the second embodiment, one of the first instrument body 11 and the second instrument body 12 is provided with a first magnetic element 41, and the other is provided with a second magnetic element. When the first instrument body 11 and the second instrument body 12 are in the unfolded state, the first magnetic element 41 and the second magnetic element are magnetically attracted to each other.
[0036] Understandably, through the magnetic attraction between the first magnetic component 41 and the second magnetic component or iron block 42, the first and second piano bodies 11 and 12 can be firmly attracted and fixed when in the unfolded state, allowing them to stably close together. Furthermore, compared to existing technologies that use snap-fit structures to lock the first and second piano bodies 11 and 12, which are prone to misalignment and instability, and whose protrusions can negatively impact their appearance, the attraction of the first magnetic component 41 and the second magnetic component or iron block 42 in this application reduces the gap between the first and second piano bodies 11 and 12, thereby improving the stability and reliability of the electronic keyboard in the unfolded state, and also enhancing its appearance.
[0037] Furthermore, a button 43 is provided on the first instrument body 11 or the second instrument body 12. The button 43 is electrically connected to the first magnetic component 41. When it is necessary to convert the first instrument body 11 and the second instrument body 12 into a folded state, pressing the button 43 causes the first magnetic component 41 to lose its magnetism, allowing the user to easily rotate the first instrument body 11 and / or the second instrument body 12. When the user needs to unfold the first instrument body 11 and the second instrument body 12, pressing the button 43 restores the magnetism of the first magnetic component 41, thereby firmly attaching and fixing the first magnetic component 41 and the second magnetic component or iron block 42.
[0038] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.
Claims
1. A folding piano structural design with a damped rotating shaft and magnetic attraction function, characterized in that, include: The instrument body includes a first instrument body and a second instrument body; At least one set of rotating structures, each set of rotating structures includes two mounting plates, two rotating shafts and two torque springs, one mounting plate is provided corresponding to one rotating shaft and one torque spring, one end of the rotating shaft is fixed to the mounting plate, and the torque spring is fixed to the outer periphery of the rotating shaft. The two mounting plates of the same set of rotating structures are respectively fixed to the first piano body and the second piano body. as well as The mounting shell has a mounting cavity formed inside, and multiple rotating shafts are rotatably connected to the mounting cavity so that the first instrument body and the second instrument body are rotatably connected.
2. The folding piano structure design with damped rotating shaft and magnetic attraction function as described in claim 1, characterized in that, Each set of rotating structures also includes a shaft sleeve, and each shaft sleeve has two mounting through holes. The two rotating shafts of the same set of rotating structures are respectively rotatably connected to the corresponding mounting through holes, and the mounting shell is sleeved and fixed to the outer periphery of the two shaft sleeves.
3. The folding piano structure design with damped rotating shaft and magnetic attraction function as described in claim 2, characterized in that, The rotating structure also includes a rotating plate, which has a first limiting part and a second limiting part. One rotating shaft is fixedly connected to one rotating plate. When the first instrument body rotates at a predetermined angle relative to the second instrument body, the first limiting part and the second limiting part stop and abut.
4. The folding piano structure design with damped rotating shaft and magnetic attraction function as described in claim 3, characterized in that, The first limiting part is a limiting groove, and the second limiting part is a limiting protrusion. When the first instrument body rotates at a predetermined angle relative to the second instrument body, the limiting protrusion abuts against the groove wall of the limiting groove.
5. The folding piano structure design with damped rotating shaft and magnetic attraction function as described in claim 1, characterized in that, Each set of rotating structures includes two driving gears, two transmission gears, and a gear plate. The two driving gears and two transmission gears are rotatably connected to the gear plate. One rotating shaft corresponds to one driving gear and one transmission gear. The driving gear is fixedly connected to the corresponding rotating shaft, and the driving gear and transmission gear corresponding to the same rotating shaft are meshed. The two transmission gears in the same set of rotating structures are meshed, so that when the first instrument body rotates, it will drive the second instrument body to rotate synchronously.
6. The folding piano structure design with damped rotating shaft and magnetic attraction function as described in claim 1, characterized in that, The mounting housing has a storage cavity, and the mounting housing has two wire holes that communicate with the storage cavity. The connection lines between the first instrument body and the second instrument body pass through the corresponding wire holes to make the first instrument body and the second instrument body electrically connected. The connection lines between the first instrument body and the second instrument body are stored in the storage cavity to hide the connection between the first instrument body and the second instrument body.
7. The folding piano structure design with damped rotating shaft and magnetic attraction function as described in claim 1, characterized in that, The mounting plate is provided with a first mounting part, and both the first and second piano bodies are provided with a second mounting part. The mounting plate is detachably connected to the corresponding first or second piano body through the first mounting part and the second mounting part.
8. The folding piano structure design with damped rotating shaft and magnetic attraction function as described in claim 7, characterized in that, The first mounting part is a first mounting hole, and the second mounting part is a second mounting hole. The mounting plate is locked to the corresponding first or second piano body through the cooperation of the first mounting hole, the second mounting hole, and screws.
9. The folding piano structure design with damped rotating shaft and magnetic attraction function as described in claim 1, characterized in that, It also includes multiple cover plates, which are detachably connected to the first instrument body and the second instrument body, and the cover plates are placed on the corresponding mounting plates.
10. The folding piano structure design with damped rotating shaft and magnetic attraction function as described in claim 1, characterized in that, One of the first and second bodies of the instrument is provided with a first magnetic component, and the other body is provided with an iron block. When the first and second bodies are in the unfolded state, the first magnetic component and the iron block are magnetically attracted to each other; or One of the first and second piano bodies is provided with a first magnetic component, and the other is provided with a second magnetic component. When the first and second piano bodies are in the unfolded state, the first and second magnetic components are magnetically attracted to each other.