Adjustable Piano

Abstract

The embodiment of the present application provides an adjustable piano, including a base, keys, and a first elastic member. A support portion and an adjustment portion are provided on the base; the keys are rotatably provided on the support portion; one end of the first elastic member is connected to the keys, and the other end of the first elastic member is connected to the adjustment portion, and at least one first elastic member is separately connected to each key; the first elastic member is used to keep the keys in a pop-up state, and the adjustment portion is used to adjust the deformation of the first elastic member when the keys are in the pop-up state, and the adjustment portion can adjust all the first elastic members on the adjustable piano synchronously or adjust one of the first elastic members separately. The adjustable piano provided by the embodiment of the present application has the function of adjusting the pressing force required for playing the piano, and improves the convenience of adjusting the required pressing force.

Description

Technical Field

[0001] The invention relates to the technical field of musical instruments, and in particular to an adjustable piano. Background Art

[0002] In the related art, due to the different weights of piano keys, the force required for users to press the piano keys when playing is also different, and the pressing force cannot be adjusted according to the user's own needs, which causes the user to press the keys too hard or have no pressing feeling when playing. Summary of the invention

[0003] The purpose of the present invention is to provide an adjustable piano to solve the technical problem in the related art that the pressing force required for playing the piano cannot be adjusted according to the user's own needs.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide an adjustable piano, the adjustable piano comprising:

[0005] A base, on which a supporting portion and an adjusting portion are arranged;

[0006] at least two piano keys, the piano keys being rotatably disposed on the support portion;

[0007] At least two first elastic members, one end of each of the first elastic members is connected to the piano key, the other end of each of the first elastic members is connected to the adjusting portion, and each of the piano keys is individually connected to at least one of the first elastic members;

[0008] The first elastic member is used to keep the key in a bounced state, and the adjusting unit is used to adjust the deformation of the first elastic member when the key is in the bounced state. The adjusting unit can synchronously adjust all the first elastic members on the adjustable piano or adjust one of the first elastic members individually.

[0009] In one embodiment, the adjustable piano may be an electronic piano, a circuit board is disposed on the base, a trigger switch is disposed on the circuit board, the trigger switch is electrically connected to a sound-generating device of the electronic piano, and the trigger switch is triggered when the key is pressed down.

[0010] In one embodiment, a limiting portion is provided on the key, and a limiting slot is provided on the base, and the limiting portion cooperates with the limiting slot to limit the extreme position of the movement of the key;

[0011] Preferably, the limiting portion may be L-shaped, one end of the limiting portion is connected to the key, and the other end of the limiting portion extends into and is clamped in the limiting groove of the base.

[0012] In one embodiment, the adjusting unit comprises:

[0013] A mounting member, the mounting member is arranged on the base, and a slide groove is arranged on the mounting member;

[0014] A common adjustment member, wherein the common adjustment member is slidably matched in a slide groove of the mounting member;

[0015] A first adjusting rod, one end of which is slidably disposed on the base, the other end of which is connected to the common adjusting member, and the first adjusting rod is used to adjust the position of the common adjusting member;

[0016] An independent adjusting member, wherein the independent adjusting member is slidably disposed on the common adjusting member, and the independent adjusting member is connected to the first elastic member;

[0017] The second adjusting rod is arranged on the common adjusting member and the independent adjusting member, and the second adjusting rod is used to adjust the position of the independent adjusting member.

[0018] In one embodiment, the adjusting unit comprises:

[0019] A mounting member, the mounting member is arranged on the base, and a slide groove is arranged on the mounting member;

[0020] A common adjustment member, wherein the common adjustment member is slidably matched in the slide groove of the mounting member, and a threaded hole is provided on the common adjustment member;

[0021] A first adjusting rod, one end of which is slidably disposed on the base, the other end of which is connected to the common adjusting member, and the first adjusting rod is used to adjust the position of the common adjusting member;

[0022] The second adjusting rod is threadedly connected and matched in the threaded hole of the common adjusting member, and the first elastic member is hinged on the second adjusting rod.

[0023] In one embodiment, the adjustable piano includes a two-stage pressing mechanism, which is arranged on the key and is used to make the key bear two different resistances in sequence during the pressing process.

[0024] In one embodiment, the two-stage pressing mechanism includes:

[0025] a first piano key, the first piano key being rotatably disposed on the supporting portion, and the first piano key being connected to the first elastic member;

[0026] a second key, the second key being hinged to the first key, and the first key and the second key having an overlapping portion;

[0027] a second elastic member, one end of the second elastic member is connected to the first key, the other end of the second elastic member is connected to the second key, and the second elastic member is used to provide resistance to the key being pressed downward;

[0028] The magnetic attraction part is arranged at the overlapping part of the first key and the second key, and the magnetic attraction part includes a first magnetic attraction component and a second magnetic attraction component. The first magnetic attraction component is arranged on the first key, and the second magnetic attraction component is arranged on the second key. The first magnetic attraction component and the second magnetic attraction component cooperate through magnetic attraction force.

[0029] In one embodiment, the second elastic member is disposed outside the first key and the second elastic member.

[0030] In one embodiment, the two-stage pressing mechanism includes:

[0031] A fixing member, wherein the fixing member is arranged on the base;

[0032] a third elastic member, one end of which is connected to the fixing member;

[0033] A movable member connected to the other end of the third elastic member;

[0034] A magnetic attraction part, wherein the magnetic attraction part is arranged between the fixed part and the movable part, and the magnetic attraction part comprises a first magnetic attraction part and a second magnetic attraction part, wherein the first magnetic attraction part is arranged on the fixed part, and the second magnetic attraction part is arranged on the movable part, and the first magnetic attraction part and the second magnetic attraction part cooperate with each other through magnetic attraction force;

[0035] A fourth elastic member, one end of which is connected to the piano key, and the other end of which is connected to the movable member; when the piano key is pressed downward, the fourth elastic member is in a gradually stretched state.

[0036] In one embodiment, the first magnetic attraction member and / or the second magnetic attraction member in the magnetic attraction portion is an electromagnet.

[0037] One or more of the above technical solutions in the embodiments of the present invention have at least the following technical effects or advantages:

[0038] The adjustable piano provided by the embodiment of the present invention connects one end of the first elastic member to the piano key and the other end to the adjustment part, and the elastic force of the first elastic member is used to keep the piano key in a pop-up state (i.e., the initial state when the piano key is not pressed). When playing, the user needs to overcome the elastic force of the first elastic member on the piano key in order to play. By adjusting the deformation of the first elastic member by the adjustment part, the elastic force of the first elastic member on the piano key can be adjusted, thereby adjusting the pressing force required by the user when playing the piano. In addition, the adjustment part can synchronously adjust all the keys on the piano or adjust one of the keys individually, thereby adjusting the pressing force required for playing the piano and improving the convenience of adjusting the required pressing force. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A schematic diagram of the structure of an adjustable piano provided by an embodiment of the present invention;

[0041] Figure 2 A schematic diagram of the structure of the adjustment unit provided by an embodiment of the present invention;

[0042] Figure 3 A schematic diagram of the structure of another adjusting unit provided by an embodiment of the present invention;

[0043] Figure 4 A schematic diagram of the structure of a two-stage pressing mechanism provided in an embodiment of the present invention;

[0044] Figure 5 for Figure 4 A schematic diagram of the motion state of the two-stage pressing mechanism when the first stage is pressing down;

[0045] Figure 6 for Figure 4 A schematic diagram of the motion state of the second stage of the two-stage pressing mechanism when pressing downward;

[0046] Figure 7 A schematic structural diagram of another two-stage pressing mechanism provided by an embodiment of the present invention;

[0047] Figure 8 A schematic structural diagram of a third two-stage pressing mechanism provided in an embodiment of the present invention.

[0048] The respective reference numerals are as follows:

[0049] 1. Base; 2. Key; 3. First elastic member; 4. Support part; 5. Adjustment part; 6. Circuit board; 7. Trigger switch; 8. Two-stage pressing mechanism; 21. Limiting part; 51. Mounting part; 52. Common adjustment part; 53. First adjustment rod; 54. Independent adjustment part; 55. Second adjustment rod; 81. First key; 82. Second key; 83. Second elastic member; 84. Magnetic part; 85. Fixing part; 86. Third elastic member; 87. Movable part; 88. Fourth elastic member. DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0051] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0052] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the related art, a piano (including an electronic piano, an ordinary piano, etc.) has multiple keys. When playing the piano, the user needs to press the piano keys into place with his fingers so that the piano can make a sound. Since the keys of different pianos are subject to different weights of the keys themselves or the elasticity of the elastic parts that keep the keys bouncing up, the pressing force required to press the keys into place is different, and different users have different finger strengths (such as the difference between adults and children, etc.), and the force required to press the piano keys cannot be adjusted, which causes the user to suffer from finger pain due to the keys being too hard (the force required to press the keys into place is too great); or the user lacks a sense of pressing due to the keys being too soft (the force required to press the keys into place is too small).

[0055] To this end, the present application embodiment provides an adjustable piano, see Figure 1 The adjustable piano includes a base 1, at least two keys 2, and at least two first elastic members 3 (for example, they may be elastic objects such as springs, shrapnel, elastic ropes, etc.).

[0056] The base 1 is provided with a support portion 4 and an adjustment portion 5. Optionally, the base 1 may be a flat plate structure to facilitate the installation and placement of the piano, and the base 1 may be made of metal or wood, but is not limited thereto; the support portion 4 may be a strip-shaped, block-shaped or other structure, and the support portion 4 may be provided with the base 1 as an integral structure or fixed to the base 1 by welding, riveting or other fixing methods.

[0057] The key 2 can be rotatably arranged on the support portion 4. Optionally, the key 2 can be adopted as follows Figure 1 The clamping method shown in the figure cooperates with the support part 4, or the support part 4 is connected and cooperated in a hinged manner. Compared with the hinged connection of the support part 4 and the key 2, the clamping method has the advantage of convenient assembly and disassembly of the key 2. Exemplarily, the surface on the support part 4 that cooperates with the key 2 can be set as a smooth curved surface, such as a smooth spherical surface, so that when the key 2 rotates, the friction resistance between the key 2 and the support part 4 can be greatly reduced, thereby increasing the service life of the key 2; in addition, a groove can be set at the matching position of the key 2, so that the key 2 is not easy to be separated from the matching with the support part 4.

[0058] One end of the first elastic member 3 is connected to the key 2, and the other end of the first elastic member 3 is connected to the adjustment part 5. At least one first elastic member 3 is individually connected to each key 2. The first elastic member 3 is used to keep the key 2 in a bounced state (i.e., the initial state when the key 2 is not pressed, and the elastic force of the first elastic member 3 needs to be overcome during the process of pressing the key 2). The adjustment part 5 is used to adjust the deformation of the first elastic member 3 when the key 2 is in the bounced state. The adjustment part 5 can adjust all the first elastic members 3 on the adjustable piano simultaneously or adjust one of the first elastic members 3 individually.

[0059] Optional, such as Figure 1 As shown, a groove can be provided on the key 2, and one end of the first elastic member 3 is fixed in the groove of the key 2, so that when the key 2 moves repeatedly, the first elastic member 3 is not easy to fall off the key 2; the connection position between the first elastic member 3 and the key 2 can be any position of the key 2, which is not limited here; in order to simplify the structure of the piano and reduce the production cost of the piano, the first elastic member 3 can correspond to the key 2 one by one. The principle of the adjustment part 5 adjusting the deformation amount of the first elastic member 3 can be: by changing the connection point position of the adjustment part 5 and the first elastic member, the deformation amount of the first elastic member 3 is changed, thereby adjusting the pressing force required to press the key 2 into place (effectively press the key 2 to make the piano sound).

[0060] In one embodiment, the adjustable piano can be an electronic piano, but is not limited thereto. A circuit board 6 is provided on the base 1, and a trigger switch 7 is provided on the circuit board 6. The trigger switch 7 is electrically connected to the sound-generating device of the electronic piano, and the trigger switch 7 is triggered when the key 2 is pressed down. When playing the electronic piano, the user presses the key 2 with a finger or other object, so that the key 2 overcomes the elastic force of the first elastic member 3 and moves downward, and at the same time, the key 2 presses the trigger switch 7, so that the trigger switch 7 is triggered, and then the trigger switch 7 transmits the trigger signal to the circuit board 6, and then the circuit board 6 controls the sound-generating device (such as a speaker, etc.) to emit a specific sound, thereby completing the playing.

[0061] See also Figure 1 In one embodiment, a limiting portion 21 is provided on the key 2, and a limiting groove is provided on the base 1. The limiting portion 21 cooperates with the limiting groove to limit the limit position of the movement of the key 2. Preferably, the limiting portion 21 may be L-shaped, one end of the limiting portion 21 is connected to the key 2, and the other end of the limiting portion 21 extends into and is clamped in the limiting groove of the base 1. Optionally, the L-shaped limiting portion 21 may be directly clamped in the protruding position of the circuit board 6, thereby simplifying the structure of the base 1 and eliminating the processing work of the limiting groove.

[0062] See also Figure 2 In one embodiment, the adjusting part 5 includes a mounting member 51, a common adjusting member 52, a first adjusting rod 53, an independent adjusting member 54, and a second adjusting rod 55. Wherein:

[0063] The mounting member 51 is arranged on the base 1, and a slide groove is arranged on the mounting member 51. Optionally, the mounting member 51 may be a long plate-shaped structure, and the mounting member 51 may be arranged as an integral structure with the base 1 or connected to the base 1 by welding, riveting or other connection methods. The shape of the slide groove on the mounting member 51 is not limited, and may be a square groove, a diamond groove, etc.

[0064] The common adjustment member 52 is slidably matched in the slide groove of the mounting member 51. Optionally, the common adjustment member 52 is a long plate-shaped structure, and the length of the common adjustment member 52 covers the distribution area of ​​all the first elastic members 3 of the entire piano.

[0065] One end of the first adjusting rod 53 is slidably arranged on the base 1, and the other end of the first adjusting rod 53 is connected to the common adjusting member 52, and the first adjusting rod 53 is used to adjust the position of the common adjusting member 52. Optionally, the shape of the first adjusting rod 53 can be a long rod-shaped structure, and one end of the first adjusting rod 53 can be provided with a handle portion for easy adjustment. The surface of the first adjusting rod 53 can be provided with threads or multiple pin holes, etc. When the surface of the first adjusting rod 53 is provided with threaded holes, the first adjusting rod 53 is threadedly connected with the common adjusting member 52, and the position of the common adjusting member 52 can be adjusted by rotating the first adjusting rod 53; when the surface of the first adjusting rod 53 is provided with a pin hole, the first adjusting rod 53 is fixedly connected with the common adjusting member 52, and the position of the common adjusting member 52 can be adjusted by pulling out the first adjusting rod 53, and then a pin or other structure can be inserted into the pin hole of the first adjusting rod 53 to fix the position of the common adjusting member 52.

[0066] The independent adjusting member 54 is slidably disposed on the common adjusting member 52, and the independent adjusting member 54 is connected to the first elastic member 3. Since the independent adjusting member 54 is disposed on the common adjusting member 52, when the position of the common adjusting member 52 is adjusted by the first adjusting rod 53, the independent adjusting member 54 on the common adjusting member 52 is adjusted synchronously, thereby adjusting the deformation amount of all the first elastic members 3 (i.e., adjusting the pressing force required for all the keys 2 to be pressed into place). Optionally, the independent adjusting member 54 can be slidably fitted on the outside of the common adjusting member 52 or be disposed through the common adjusting member 52.

[0067] The second adjusting rod 55 is provided on the common adjusting member 52 and the independent adjusting member 54, and is used to adjust the position of the independent adjusting member 54. Optionally, the second adjusting rod 55 may adopt a structure similar to the first adjusting rod 53. When the position of the independent adjusting member 54 is adjusted by the second adjusting rod 55, the deformation amount of the first elastic member 3 connected to the independent adjusting member 54 changes, thereby adjusting the pressing force required when the individual key 2 is pressed into place.

[0068] See also Figure 3In one embodiment, in order to simplify the structure of the adjustment part 5, the second adjustment rod 55 and the independent adjustment member 54 in the above embodiment can be integrated into an integrated structure. Optionally, the shape of the independent adjustment member 54 can be set to be a screw rod, and the independent adjustment member 54 can be set to the common adjustment member 52 by threaded matching, and one end of the first elastic member 3 can be directly rotatably connected (specifically, the connection method can be riveted, or hinged, etc.) to the independent adjustment member 54, and then when it is necessary to adjust a certain key 2 separately, it is only necessary to rotate the independent adjustment member 54 to change the position of the independent adjustment member 54, and then change the deformation of the first elastic member 3 to achieve the adjustment of the pressure required to press the key 2.

[0069] In one embodiment, the adjustable piano includes a two-stage pressing mechanism 8, which is arranged on the key 2, and is used to make the key 2 bear two different resistances in the pressing process. Optionally, the two-stage pressing mechanism 8 can make the resistance in the first stage larger and the resistance in the second stage smaller when the user presses the key 2, so that when the user presses the key 2, the larger resistance in the first stage gives a better pressing feeling, and when entering the second stage, the smaller pressing resistance can make the user easily press the key 2 into place, so as to improve the pressing feeling of pressing the key 2 during the piano playing process, and at the same time reduce the force required to press the key 2 in the whole pressing process, improve the pressing feeling of the user when playing the piano and reduce the fatigue of the user when playing for a long time.

[0070] See also Figure 4-7 In one embodiment, the two-stage pressing mechanism 8 includes a first key 81, a second key 82, a magnetic attraction portion 84, and a second elastic member 83.

[0071] The first key 81 is rotatably disposed on the support portion 4, and the first key 81 is connected to the first elastic member 3. Optionally, the first key 81 can be connected to the support portion 4 by a connection method such as clamping or riveting.

[0072] The second key 82 is hinged to the first key 81 , and the first key 81 and the second key 82 have an overlapping portion. Optionally, the key 2 includes the first key 81 and the second key 82 .

[0073] One end of the second elastic member 83 is connected to the first key 81, and the other end of the second elastic member 83 is connected to the second key 82. The second elastic member 83 is used to provide resistance to the key 2 from being pressed down. Optionally, the second elastic member 83 can be an object that can provide elastic force, such as a spring, a shrapnel, an elastic rope, etc. The second elastic member 83 can be arranged at the overlapping position of the first key 81 and the second key 82 (such as Figure 4-6 ), or set at a non-overlapping position of the first key 81 and the second key 82 (as shown in the figure) Figure 7The second elastic member 83 is arranged at the overlapping position of the first key 81 and the second key 82, so that the second elastic member 83 can be hidden, thereby making the structure of the two-stage pressing mechanism 8 more compact. The second elastic member 83 is arranged at the non-overlapping position of the first key 81 and the second key 82, so that the difficulty of installing and removing the second elastic member 83 can be reduced.

[0074] For example, a receiving groove may be provided at the overlapping position of the first key 81 and the second key 82 to accommodate the second elastic member 83. Furthermore, the receiving groove may be provided in an arc shape, and the center of the arc is the hinge point of the first key 81 and the second key 82, so that when the first key 81 rotates relative to the second key 82, the second elastic member 83 may change accordingly, thereby protecting the second elastic member 83.

[0075] The magnetic attraction part 84 is arranged at the overlapping part of the first key 81 and the second key 82. The magnetic attraction part 84 includes a first magnetic attraction member and a second magnetic attraction member. The first magnetic attraction member is arranged on the first key 81, and the second magnetic attraction member is arranged on the second key 82. The first magnetic attraction member and the second magnetic attraction member cooperate through magnetic attraction. Optionally, the first magnetic attraction member and / or the second magnetic attraction member are magnetic objects (such as magnets or electromagnets, etc.) with magnetism, and the first magnetic attraction member and the second magnetic attraction member attract each other.

[0076] When the user does not press the key 2, the two-stage pressing mechanism 8 is as follows: Figure 4 In the state shown, when the user starts to press key 2 ( Figure 4 When the left end of the first key 81 is pressed, the first key 81 and the second key 82 are in a state of overlapping synchronous movement under the magnetic force of the magnetic attraction portion 84. At this time, the user needs to overcome the elastic force given by the first elastic member 3 to press the key 2 down to Figure 5 At this time, the key 2 moves to the first stage. At this time, the elastic force of the first elastic member 3 on the second key 82 gradually increases and is greater than the magnetic force of the magnetic attraction portion 84, so that the first magnetic attraction member of the magnetic attraction portion 84 is separated from the second magnetic attraction member, the first key 81 rotates around the hinge position with the second key 82, and the second elastic member 83 is stretched. At this time, the key 2 moves to the second stage (as shown in FIG. Figure 6 As shown in the figure, the second elastic member 83 can be deformed in the second stage, so that the pressing force required when the key 2 is in the second stage is smaller. This can improve the pressing feeling of the key 2 during piano playing, and reduce the force required to press the key 2 during the entire pressing process, thereby improving the pressing feeling of the user when playing the piano and reducing the fatigue of the user when playing for a long time.

[0077] See also Figure 8In one embodiment, the two-stage pressing mechanism 8 includes a fixing member 85, a third elastic member 86, a movable member 87 (which may be a flat plate structure), a magnetic attraction portion 84, and a fourth elastic member 88. Among them:

[0078] The fixing member 85 is arranged on the base 1, one end of the third elastic member 86 (which can be a spring, a spring sheet, an elastic rope, etc. that can provide elastic force) is connected to the fixing member 85, and the movable member 87 is connected to the other end of the third elastic member 86. The magnetic attraction portion 84 is arranged between the fixing member 85 and the movable member 87, and the magnetic attraction portion 84 includes a first magnetic attraction member and a second magnetic attraction member. The first magnetic attraction member is arranged on the fixing member 85, and the second magnetic attraction member is arranged on the movable member 87. The first magnetic attraction member and the second magnetic attraction member cooperate through magnetic attraction. One end of the fourth elastic member 88 (which can be a spring, a spring sheet, an elastic rope, etc. that can provide elastic force) is connected to the piano key 2, and the other end of the fourth elastic member 88 is connected to the movable member 87 (optionally, the middle part of the fourth elastic member 88 can be the same as Figure 8 As shown in , it is hung on the hinge axis between the key 2 and the support rod, and the two ends of the fourth elastic member 88 are respectively on both sides of the hinge axis); when the key 2 is pressed down, the fourth elastic member 88 is in a gradually stretched state. At this time, due to the magnetic attraction of the magnetic attraction part 84, the movable plate is in a static state (this is the first stage of the key 2 being pressed down), and the resistance to pressing the key 2 is relatively large. When the elastic force given by the fourth elasticity to the movable member 87 is large enough (greater than the magnetic force given by the magnetic attraction part 84), the first magnetic attraction part and the second magnetic attraction part of the magnetic attraction part 84 are separated from each other, so that the movable member 87 starts to move. At this time, the third elasticity is in a deformable state to cooperate with the further pressing of the key 2 (entering the second stage of the key 2 being pressed down). Since the third elasticity and the fourth elastic member 88 can be deformed to cooperate with the key 2 being pressed down, the resistance to the key 2 being pressed down decreases. Thereby, the pressing feeling of pressing the key 2 during piano playing is improved, and at the same time, the force required to press the key 2 during the entire pressing process is reduced, thereby improving the pressing feeling of the user when playing the piano and reducing the fatigue of the user when playing for a long time.

[0079] In one embodiment, the first magnetic member and / or the second magnetic member in the magnetic attraction portion 84 is an electromagnet. In order to adjust the pressure required in the first stage of the pressing process of the key 2 in the two-stage pressing mechanism 8, the first magnetic member and / or the second magnetic member in the magnetic attraction portion 84 can be set as an electromagnet, and the magnetic attraction force provided by the magnetic attraction portion 84 can be changed by changing the magnitude of the current in the electromagnet, thereby changing the magnetic attraction force given by the magnetic attraction portion 84 to the movable member 87 / the second key 82, thereby changing the pressure required in the first stage of the pressing process of the key 2.

[0080] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable piano, characterized in that: The adjustable piano comprises: A base, on which a supporting portion and an adjusting portion are arranged; at least two piano keys, the piano keys being rotatably disposed on the support portion; At least two first elastic members, one end of each of the first elastic members is connected to the piano key, the other end of each of the first elastic members is connected to the adjusting portion, and each of the piano keys is individually connected to at least one of the first elastic members; The first elastic member is used to keep the key in a bounced state, and the adjusting unit is used to adjust the deformation of the first elastic member when the key is in the bounced state. The adjusting unit can adjust all the first elastic members on the adjustable piano simultaneously or adjust one of the first elastic members alone. The adjustment unit comprises: A mounting member, the mounting member is arranged on the base, and a slide groove is arranged on the mounting member; A common adjustment member, wherein the common adjustment member is slidably matched in a slide groove of the mounting member; A first adjusting rod, one end of which is slidably disposed on the base, the other end of which is connected to the common adjusting member, and the first adjusting rod is used to adjust the position of the common adjusting member; An independent adjusting member, the independent adjusting member is an L-shaped rod, the independent adjusting member is composed of an integrated vertical section and a horizontal section, the vertical section of the independent adjusting member is slidably arranged on the common adjusting member, the independent adjusting member is fixedly connected to the first elastic member, and a threaded hole is arranged on the horizontal section of the independent adjusting member; The second adjusting rod is a threaded rod, the second adjusting rod is threadedly engaged in the threaded hole of the horizontal section of the independent adjusting member, and one end of the second adjusting rod is rotatably connected to the common adjusting member, and the second adjusting rod is used to adjust the position of the independent adjusting member.

2. The adjustable piano according to claim 1, characterized in that: The adjustable piano may be an electronic piano. A circuit board is disposed on the base. A trigger switch is disposed on the circuit board. The trigger switch is electrically connected to a sound-generating device of the electronic piano. The trigger switch is triggered when the key is pressed down.

3. The adjustable piano according to claim 1, characterized in that: The piano key is provided with a limiting portion, and the base is provided with a limiting slot, and the limiting portion cooperates with the limiting slot to limit the extreme position of the movement of the piano key; The limiting portion may be L-shaped in shape, one end of the limiting portion is connected to the piano key, and the other end of the limiting portion extends into and is clamped in the limiting groove of the base.

4. The adjustable piano according to claim 1, characterized in that: The adjustable piano comprises a two-stage pressing mechanism, which is arranged on the key and is used to make the key bear two resistances of different sizes successively during the pressing process.

5. The adjustable piano according to claim 4, characterized in that: The two-stage pressing mechanism comprises: a first piano key, the first piano key being rotatably disposed on the supporting portion, and the first piano key being connected to the first elastic member; a second key, the second key being hinged to the first key, and the first key and the second key having an overlapping portion; a second elastic member, one end of the second elastic member is connected to the first key, the other end of the second elastic member is connected to the second key, and the second elastic member is used to provide resistance to the key being pressed downward; The magnetic attraction part is arranged at the overlapping part of the first key and the second key, and the magnetic attraction part includes a first magnetic attraction component and a second magnetic attraction component. The first magnetic attraction component is arranged on the first key, and the second magnetic attraction component is arranged on the second key. The first magnetic attraction component and the second magnetic attraction component cooperate through magnetic attraction force.

6. The adjustable piano according to claim 5, characterized in that: The second elastic member is arranged outside the first key and the second elastic member.

7. The adjustable piano according to claim 4, characterized in that: The two-stage pressing mechanism comprises: A fixing member, wherein the fixing member is arranged on the base; a third elastic member, one end of which is connected to the fixing member; A movable member connected to the other end of the third elastic member; A magnetic attraction part, wherein the magnetic attraction part is arranged between the fixed part and the movable part, and the magnetic attraction part comprises a first magnetic attraction part and a second magnetic attraction part, wherein the first magnetic attraction part is arranged on the fixed part, and the second magnetic attraction part is arranged on the movable part, and the first magnetic attraction part and the second magnetic attraction part cooperate with each other through magnetic attraction force; A fourth elastic member, one end of which is connected to the piano key, and the other end of which is connected to the movable member; when the piano key is pressed downward, the fourth elastic member is in a gradually stretched state.

8. The adjustable piano according to any one of claims 5 or 7, characterized in that: The first magnetic attraction component and / or the second magnetic attraction component is an electromagnet.

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