An electric piano

Abstract

This invention relates to the field of musical instrument technology, specifically to an electric piano. The electric piano includes a piano stand, on which keys, a cover plate module, a connector, and a segmented drive module are arranged. The segmented drive module includes: a guide rail, a first connecting rod, a second connecting rod, and a motor unit. The guide rail is equipped with a limiter; the second connecting rod is arc-shaped. A first slider and a second slider are respectively arranged on the guide rail; the first end of the first connecting rod and the first end of the second connecting rod are respectively connected to the first slider and the second slider; the second end of the first connecting rod and the second end of the second connecting rod are respectively hinged to the connector, and the connector is connected to the cover plate module; the output end of the motor unit is connected to the first slider. In this invention, the cover plate module first translates, thereby allowing the cover plate module to make room for rotation, and then one end of the cover plate module rotates, thus eliminating the need for an additional external clearance area. This two-stage movement process avoids the cover plate module rotation operation occupying too much space, improving space resource utilization.

Description

Technical Field

[0001] This invention relates to the field of musical instrument technology, specifically to an electric piano. Background Technology

[0002] Digital pianos are currently a widely used everyday musical instrument. Existing digital pianos on the market fall into two categories: those without key covers, which offer no protection for the piano body; and those with traditional manually opened key covers, which require frequent use and increase the need for manual opening. Therefore, current technology proposes pianos with key covers that open automatically.

[0003] For example, Chinese utility model patent CN206134216U discloses an automatic sensing and slow-closing device for a piano lid, including a piano back panel, a piano lid, an electric push rod, a one-way damping hinge, a sensor, and a controller. The fixed end of the electric push rod is fixedly connected to the piano back panel, and the telescopic end faces the piano lid. The inner middle of the piano lid is movably connected to the piano body through the one-way damping hinge. The sensor is a microwave sensor and an infrared sensor, which are located on the piano back panel. The controller receives signals from the sensor and controls the extension and retraction of the electric push rod. This utility model sets an automatically retractable push rod on the piano key cover, and opens the piano key cover by controlling the push rod. This automatic opening piano key cover structure is designed to address the traditional piano structure, using a position on the piano back panel higher than the piano lid as the fixed fulcrum for the retractable push rod, thereby pulling the piano lid to open and close.

[0004] For example, Chinese utility model patent CN223284727U discloses a piano cover for a new energy electronic piano that can be flexibly rotated and positioned, including a piano body and a flip cover. Rotating mechanisms are fixedly connected to the left and right sides of the piano body near the rear and the left and right sides of the flip cover near the front. A first connecting rod is fixedly connected to the outer side of the rotating mechanism, and two first connecting rods are symmetrically distributed on the left and right. A flip plate is rotatably connected to the lower surface of the flip cover near the front. A flipping mechanism is fixedly connected to the inner side of the flip plate near the left and right sides.

[0005] The above patent documents address the automatic opening and closing of the key cover of an electric piano, but the following problems exist: 1. It only serves as a key cover to protect the keys and a shelf for placing items, with a relatively simple function; 2. The rotation operation occupies a large space during the automatic opening and closing of the key cover of the electric piano. Summary of the Invention The purpose of this invention is to provide an electric piano that partially solves or alleviates the above-mentioned shortcomings of the prior art, and realizes the automatic opening and closing of the key cover while saving the operating space of the key cover rotation.

[0006] To solve the aforementioned technical problems, the present invention specifically adopts the following technical solution: This invention provides an electric piano, comprising: a piano base, wherein the piano base is provided with piano keys, a cover plate module, connectors, and a segmented drive module; wherein the segmented drive module includes: Guide rail, first link, second link, motor unit; The rear end of the guide rail is provided with a limiting component; the second connecting rod is an arc shape that bends toward the first connecting rod; The guide rail is respectively provided with a first slider and a second slider; and the first end of the first connecting rod and the first end of the second connecting rod are respectively connected to the first slider and the second slider. The second end of the first connecting rod and the second end of the second connecting rod are respectively hinged to the connecting member, and the connecting member is connected to the cover plate module; The output end of the motor unit is connected to the first slider; When the cover plate module is in the first movement stage, the motor unit drives the first slider to move along the front end of the guide rail to the rear end of the guide rail. At this time, the second connecting rod moves synchronously toward the rear end of the guide rail under the action of the first connecting rod. At this time, the connecting piece moves backward along the direction of the guide rail. The cover plate module moves with the connecting piece to expose the piano keys. When the second slider abuts against the limiting member, the cover plate module moves from the first movement stage to the second movement stage. At this time, the second end of the first connecting rod and the second end of the second connecting rod rotate relative to the connecting member, so that the connecting member rotates relative to the horizontal plane.

[0007] Furthermore, the first end of the second connecting rod is hinged to the second slider.

[0008] Furthermore, the length of the first link is less than the length of the second link.

[0009] Furthermore, in the first movement phase, the change in distance between the first slider and the second slider is less than 5% of the original initial distance; in the second movement phase, the distance between the first slider and the second slider shows a decreasing trend.

[0010] Furthermore, the cover module includes: a lower speaker shell fixedly connected to the connector and capable of covering the piano keys, and an upper speaker shell covering the lower speaker shell. The cover module also includes: a speaker disposed on the upper speaker shell and used for playing piano sounds.

[0011] Furthermore, the motor unit includes: a lead screw connected to the first slider and capable of moving the first slider along the guide rail, and a drive mechanism rotatably connected to the lead screw.

[0012] Furthermore, a groove extending along the length of the key is provided on the piano stand near the rear end of the key, and the front end of the tilted cover module is located at the rear end of the groove.

[0013] Furthermore, a sensor is provided at the front end of the piano stand near the keys. The sensor is electrically connected to the segmented drive module. When a person approaches the piano stand, the segmented drive module moves the cover plate module to expose the keys.

[0014] Furthermore, the electric piano also includes: a mounting base fixed to the piano stand, one end of which extends along the direction of the guide rail and is fixed to the guide rail, so that the guide rail is away from the surface of the piano stand.

[0015] Furthermore, the cover module also includes a speaker decorative cover, which is fixed to the upper shell of the speaker via a quick-release structure.

[0016] Beneficial technical effects: Compared to existing technologies where the key cover needs to be supported to create a certain distance between it and the keys before the cover module is moved to expose all the keys, this new technology offers a more efficient solution.

[0017] The electric piano of this invention, driven by a segmented drive module, enables the cover module (i.e., the key cover in this invention) connected to the connecting member to automatically open and close. The segmented drive module includes a guide rail and a first and second connecting rod that can slide along the guide rail. The first and second connecting rods are hinged to the connecting member. A motor unit drives the second connecting rod to move, thereby moving the connecting member, and thus the cover module. Specifically, the opening of the cover module consists of two processes: translation and rotation. In the translation phase, the first slider, which drives the first connecting rod, and the second slider, which drives the second connecting rod, slide simultaneously until the second slider reaches the limiting member. During this phase, the cover module translates, revealing the keys. In the rotation phase, when the second slider stops sliding due to the blocking of the limiting member, the first slider continues to slide. The connecting member, hinged to the first and second connecting rods, begins to tilt and rotate, causing the rear end of the cover module to rotate around the front end, i.e., the rear end of the cover module tilts upwards (correspondingly, the closing of the cover module is the opposite of the opening process). The segmented movement of the connecting piece is achieved by adjusting the movement of the first and second sliders.

[0018] Based on the structure of an electric piano, this invention utilizes a segmented design for the cover module, employing only translation and rotation to achieve automatic opening and closing. In this invention, the cover module first translates, creating space for rotation. Then, one end of the cover module rotates, eliminating the need for additional external clearance. This two-stage movement process avoids excessive space occupation during cover module rotation, thus improving space utilization.

[0019] The cover module of this invention further integrates the sound-generating unit (i.e., the speaker in this invention) and the music stand function onto the key cover, eliminating the need for additional structures. Specifically, compared to current digital pianos where the sound-generating unit is fixed to the piano body and the sound propagation direction is fixed (upward, downward, forward, backward), users of different heights often find it difficult to obtain the optimal sound experience. In this invention, the key cover's rotation angle can be adjusted according to the user's height. For example, for taller users, the key cover rotates at a smaller angle relative to the horizontal plane, ensuring the user's ears are directly facing the direction of sound propagation.

[0020] Furthermore, the mating structure of the groove and the inclined key cover can serve as a music stand for an electric piano, wherein the sheet music is placed in the groove, and the key cover, which is inclined relative to the horizontal plane on the rear side of the groove, serves as a support surface for the sheet music. The cover module of the present invention integrates the multifunctional requirements of an automatically opening and closing key cover, an adjustable playback angle speaker, and a music stand function into a single structure based solely on a change in the rotation method. Attached Figure Description

[0021] 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. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale. Obviously, the drawings described below are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of the closed state structure of the cover module of the electric piano of this application; Figure 2 This is an exploded view of the cover plate module of the electric piano of this application; Figure 3 This is a schematic diagram of the internal structure of the cover plate module of the electric piano of this application; Figure 4 This is a schematic diagram of the segmented drive module of the electric piano in this application in different states; Figure 5This is a schematic diagram of the structure of the cover module of the electric piano of this application after it is opened.

[0023] Summary of attached labeling and identification: 1. Piano stand; 2. Cover plate module; 3. Connector; 4. Segmented drive module; 5. Sensor; 6. Piano keys; 7. Groove; 21. Speaker lower shell; 22. Speaker upper shell; 23. Speaker; 24. Speaker decorative cover; 41. Mounting base; 42. Motor unit; 43. Guide rail; 44. Limiting component; 421. Lead screw; 431. First connecting rod; 432. Second connecting rod; 433. First slider; 434. Second slider. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] In this document, suffixes such as "module," "part," or "unit" used to denote elements are used only for the purpose of illustrative purposes and have no specific meaning in themselves. Therefore, "module," "part," or "unit" may be used interchangeably.

[0026] In this document, the terms "upper," "lower," "inner," "outer," "front," "rear," "one end," and "the other end," 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 present 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 present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In this document, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] In this document, "and / or" includes any and all combinations of one or more of the listed related items.

[0029] In this article, "multiple" means two or more, that is, it includes two, three, four, five, etc.

[0030] As used in this specification, the term "about" typically means + / -5% of the value, more typically + / -4% of the value, more typically + / -3% of the value, more typically + / -2% of the value, even more typically + / -1% of the value, and even more typically + / -0.5% of the value.

[0031] In this specification, certain embodiments may be disclosed in a range-bound format. It should be understood that this "range-bound" description is merely for convenience and brevity and should not be construed as a rigid limitation on the disclosed range. Therefore, the description of a range should be considered as having specifically disclosed all possible subranges and the individual numerical values ​​within those ranges. For example, a description of the range 1-6 should be considered as having specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and the individual numbers within those ranges, such as 1, 2, 3, 4, 5, and 6. This rule applies regardless of the breadth of the range.

[0032] Example 1: like Figure 2 and Figure 4 As shown, in this embodiment, an electric piano is provided, including: a piano stand 1, on which piano keys 6, a cover plate module 2, a connector 3, and a segmented drive module 4 are provided; wherein, the segmented drive module 4 includes: a guide rail 43, a first connecting rod 431, a second connecting rod 432, and a motor unit 42; a limit member 44 is provided at the rear end of the guide rail 43.

[0033] The guide rail 43 is provided with a first slider 433 and a second slider 434 respectively; and the first end of the first connecting rod 431 and the first end of the second connecting rod 432 are respectively connected to the first slider 433 and the second slider 434.

[0034] The second end of the first connecting rod 431 and the second end of the second connecting rod 432 are respectively hinged to the connecting member 3, and the connecting member 3 is connected to the cover plate module 2.

[0035] The output end of the motor unit 42 is connected to the first slider 433.

[0036] In this embodiment, the cover module 2 serves as the key cover for the digital piano, improving upon the existing function of key covers in protecting the keys. The segmented drive module 4 is located on the left and right sides of the keys 6 (on the piano stand 1). The cover module 2 moves via the connecting member 3, while the segmented drive module 4 drives the translation and rotation of the connecting member 3. The motor unit serves as the driving device for moving the first connecting rod. (See [reference needed]). Figure 3 .

[0037] In this embodiment, the first end of the first link refers to the end of the first link that is close to the cover plate module, and the second end of the second link refers to the other end relative to the first end of the first link.

[0038] The automatic opening process of the cover plate module of this invention: When the cover plate module 2 is in the first movement stage (e.g.) Figure 1 (As shown in the closed state of the cover module), the motor unit 42 drives the first slider 433 to move along the front end of the guide rail 43 to the rear end of the guide rail 43. At this time, the second connecting rod 432 moves synchronously toward the rear end of the guide rail 43 under the driving action of the first connecting rod 431. At this time, the connecting piece 3 moves backward along the direction of the guide rail 43; the cover module 2 moves with the connecting piece 3 to expose the piano key 6.

[0039] When the second slider 434 abuts against the limiting member 44, the cover plate module 2 enters the second movement stage from the first movement stage. At this time, the second end of the second connecting rod 432 remains fixed in position under the action of the limiting member, while the first connecting rod 431 continues to move towards the rear end of the guide rail. Simultaneously, the second ends of the first connecting rod 431 and the second ends of the second connecting rod 432 rotate relative to the connecting member 3, so that the connecting member 3 rotates relative to the horizontal plane. That is, at this time, the connecting member 3 switches from translational motion to rotation.

[0040] In this embodiment, the opening of the cover module consists of two movements: translation and rotation. In the translation phase (the first movement phase as referred to in this invention), the first slider, which drives the first connecting rod, and the second slider, which drives the second connecting rod, slide simultaneously until the second slider reaches the limiting member. During this phase, the cover module translates, revealing the piano keys. In the rotation phase (the second movement phase as referred to in this invention), when the second slider stops sliding due to the obstruction of the limiting member, the first slider continues to slide. The connecting member hinged to the first and second connecting rods begins to tilt and rotate, causing the rear end of the cover module to rotate around the front end, i.e., the rear end of the cover module tilts upwards (correspondingly, the closing of the cover module is the opposite of the opening process). See [link to relevant documentation]. Figure 5 The segmented movement of the connecting piece is achieved through the movable arrangement of the first and second sliders.

[0041] In this embodiment, two strokes, translation and rotation, are specially designed for opening the cover module. The cooperation between these translation and rotation strokes can reduce the external space required for the cover to open and close, thereby avoiding the cover module from occupying too much space above the piano.

[0042] For example, from a spatial planning perspective, the translation-to-rotation switching mode in this embodiment directly utilizes the original spatial planning of the piano. Specifically, in common digital pianos, the space behind the keys is usually relatively more spacious (e.g., there may be some relatively empty, unused space behind the keys). In this application, by connecting translation and rotation, the rotation task is arranged in the relatively spacious, less utilized rear area. This avoids the problem of accidentally touching the keys if the cover is not high enough when starting rotation too early.

[0043] At the same time, since the back of a piano is usually against a wall or in an area with less activity during daily use, the rotation is moved to the rear by shifting the rotation activity that is easy to consume dynamic space to this rear area where the space is used less.

[0044] Furthermore, this embodiment utilizes a dual-connector configuration, employing both front and rear connectors, with the rear connector (the second connector) initially maintaining a certain distance from the limiting member. This allows for a simple implementation of segmented motion from translation to rotation within the same drive system. In other words, the cover plate module in this application exhibits a trajectory of sliding followed by flipping.

[0045] It should be noted that the cover module in this embodiment can be used for both traditional grand pianos and upright pianos, as well as electronic pianos. The term "electronic piano" in this article refers to a piano equipped with an electrically operated cover, and is not limited to any specific type of piano.

[0046] From another perspective, this invention, based on the structure of an electric piano, uses a segmented design for the cover module, employing only translation and rotation to achieve automatic opening and closing. In this invention, the cover module first translates, allowing it to make way for the space required for rotation. Then, one end of the cover module rotates, eliminating the need for additional external clearance. This two-stage movement process avoids the cover module's rotation operation occupying excessive space, thus improving space utilization.

[0047] In some embodiments, the first end of the second connecting rod 432 is hinged to the second slider 434.

[0048] In some embodiments, the length of the first link 431 is less than the length of the second link 432.

[0049] In this embodiment, the two ends of the second link are hinged to the connector and the second slider, respectively. During the rotation phase, the second link rotates upward, thereby forming a height difference with the first link. This height difference allows the connector to rotate at a larger angle.

[0050] In some embodiments, the second link 432 is an arc-shaped component that bends toward the first link 431. That is, in this embodiment, the first link can be a straight rod, while the second link can be a curved rod. The combination of straight and curved rods achieves the purpose of translation followed by rotation. Alternatively, using dissimilar links makes it easier to implement segmented motion design.

[0051] In particular, the second link is designed to be arc-shaped, which further saves the space required during rotation.

[0052] In this embodiment, a support rod and a bent rod work together, wherein the bent rod at the rear end cooperates to make the connecting member maintain a relatively stable translation during the first movement phase.

[0053] In some embodiments, during the first movement phase, the change in distance between the first slider 433 and the second slider 434 is less than 5% of the original initial distance; during the second movement phase, the distance between the first slider 433 and the second slider 434 shows a decreasing trend.

[0054] In this embodiment, the cover module achieves opening through two stages: translation and rotation. Correspondingly, the closing process is the reverse. During the translation stage, the first and second sliders move simultaneously on the guide rail. It can be understood that during this process, the distance between the first and second sliders is approximately the same, meaning the change in distance between them is less than 5% of their initial distance. During the rotation stage, due to the action of the limiting component, the second slider stops sliding, and the first slider continues to slide towards the second slider. This causes the connecting piece to rotate and form an angle with the horizontal plane.

[0055] In some embodiments, the cover module 2 includes: a lower speaker shell 21 fixedly connected to the connector 3 and capable of covering the piano keys 6, and an upper speaker shell 22 covering the lower speaker shell 21. The cover module 2 further includes: a speaker 23 disposed on the upper speaker shell 22 and used for playing piano sounds.

[0056] In this embodiment, the lower shell of the speaker is used as the key cover of the piano keys, the connector 3 is set inside the lower shell of the speaker, and multiple reinforcing ribs are provided inside the lower shell of the speaker.

[0057] In this embodiment, the cover module of the present invention further integrates the sound-generating unit onto the key cover. Specifically, compared to current digital pianos where the sound-generating unit is fixed to the piano body and the sound propagation direction is fixed (up, down, forward, backward), users of different heights find it difficult to obtain the optimal sound experience. In the rotating phase of the key cover of the digital piano of the present invention, the tilt angle of the key cover can be adjusted according to different heights. For example, for taller users, the tilt angle of the key cover is smaller relative to the horizontal plane, so that the user's ears are directly facing the direction of sound propagation.

[0058] In some embodiments, the cover module further includes a speaker decorative cover 24, which is fixed to the speaker upper shell 22 by a quick-release structure.

[0059] In some embodiments, the motor unit 42 includes: a lead screw 421 connected to the first slider 433 and capable of moving the first slider 433 along the guide rail 43, and a drive mechanism rotatably connected to the lead screw 421.

[0060] In this embodiment, the motor unit uses a lead screw connection to drive the first slider to move along the guide rail.

[0061] In some embodiments, a groove 7 extending along the length of the key 6 is provided on the piano stand 1 near the rear end of the key 6, and the front end of the cover plate module 2 after tilting is located at the rear end of the groove 7.

[0062] In this embodiment, the mating structure of the groove and the inclined key cover can serve as a music stand for an electric piano. The music sheet is placed in the groove, and the key cover, which is inclined relative to the horizontal plane on the back side of the groove, can serve as a support surface for the music sheet.

[0063] The cover module of this invention integrates the multifunctional requirements of an automatically opening and closing piano key cover, an adjustable playback angle speaker, and a music stand into a single structure based solely on a change in the rotation method.

[0064] In some embodiments, a sensor 5 is provided at the front end of the piano stand 1 near the piano keys 6. The sensor 5 is electrically connected to the segmented drive module 4. When a human body approaches the piano stand 1, the segmented drive module 4 drives the cover plate module 2 to move to expose the piano keys 6.

[0065] In this embodiment, a sensor is placed at the middle position of the front end of the piano stand, so as to control the segmented drive module to open the cover module when a human body is sitting on the electric piano.

[0066] In some embodiments, the electric piano further includes a mounting base 41 fixed to the piano stand 1, wherein one end of the mounting base 41 extending along the direction of the guide rail 43 is fixed to the guide rail 43, such that the guide rail 43 is away from the surface of the piano stand 1.

[0067] In this embodiment, the mounting base is used to fix the motor unit and the guide rail, so that the first link and the second link can move stably on the guide rail.

[0068] Example 2: This embodiment provides another automatic opening and closing device for a cover plate module, which will be described below with reference to specific embodiments.

[0069] An automatic opening and closing device for a cover plate module according to this embodiment includes: a cover plate module 2 for closing the opening above the piano key 6, and a segmented drive module 4; wherein, the segmented drive module 4 includes: a guide rail 43, a first connecting rod 431, a second connecting rod 432, and a motor unit 42. The second ends of the first connecting rod 431 and the second connecting rod 432 are respectively hinged to the cover plate module 2; the first ends of the first connecting rod 431 and the second ends of the second connecting rod 432 are respectively slidably connected to the guide rail 43. The output end of the motor unit 42 is connected to the first connecting rod 431.

[0070] When the cover plate module 2 is in the first movement stage, the motor unit 42 drives the first connecting rod 431 to move along the front end of the guide rail 43 to the rear end of the guide rail 43. At this time, the second connecting rod 432 moves synchronously toward the rear end of the guide rail 43 under the driving action of the first connecting rod 431. At this time, the cover plate module 2 moves with the first connecting rod 431 and the second connecting rod 432 to expose the piano key 6. When the second connecting rod 432 moves to the first position of the guide rail 43 and stops sliding, the cover plate module 2 enters the second movement stage from the first movement stage. At this time, the second end of the first connecting rod 431 and the second end of the second connecting rod 432 rotate relative to the cover plate module 2, so that the cover plate module 2 rotates relative to the horizontal plane.

[0071] In this embodiment, the opening of the cover module consists of two processes: translation and rotation. During the translation phase (first movement phase), the first and second connecting rods slide simultaneously until the second connecting rod reaches the first position; during this phase, the cover module translates. During the rotation phase (second movement phase), when the second connecting rod stops sliding due to the obstruction of the limiting structure, the first connecting rod continues to slide. The cover module, hinged to the first and second connecting rods, begins to tilt and rotate, causing the rear end of the cover module to rotate around the front end, i.e., the rear end of the cover module tilts upwards (correspondingly, the closing of the cover module is the opposite of the opening process).

[0072] In this embodiment, the first position refers to the position where the second link stops moving after reaching that position on the guide rail. Specifically, a structure is provided at this position to prevent the second link from moving. For example, it could be a limiting block as in Embodiment 1, or other structures that restrict movement.

[0073] In this embodiment, the cover plate module is hinged to the first and second connecting rods, thereby enabling the cover plate module to move. Unlike in Embodiment 1, no connecting member is required; that is, there is no need to connect the cover plate module to the first and second connecting rods via a connecting member.

[0074] In some embodiments, the first end of the second link 432 is hinged to the guide rail 43.

[0075] In this embodiment, the first ends of the first link and the second link are directly connected to the guide rail. Of course, in other embodiments, the first link and the second link and the guide rail are connected by a slider as a connection structure between the two structures (the guide rail and the first link and the second link).

[0076] In this embodiment, both the first link and the second link are straight rods, that is, the line connecting the first end connected to the guide rail and the second end connected to the cover plate module is a straight line.

[0077] In some embodiments, the length of the first link 431 is less than the length of the second link 432.

[0078] In some embodiments, during the first movement phase, the change in distance between the first link 431 and the second link 432 is less than 5% of the original initial distance (which can be regarded as the relative distance between the first link and the second link remaining unchanged); during the second movement phase, the distance between the first link 431 and the second link 432 shows a decreasing trend.

[0079] In some embodiments, the cover module 2 includes: a lower speaker shell 21 fixedly connected to the first connecting rod 431 and the second connecting rod 432 and covering the piano key 6, and an upper speaker shell 22 covering the lower speaker shell 21. The cover module 2 further includes: a speaker 23 disposed on the upper speaker shell 22 and used for playing piano sounds.

[0080] In some embodiments, the motor unit 42 includes: a lead screw 421 connected to a first end of the first connecting rod 431 and capable of moving the first connecting rod 431 along the guide rail 43, and a drive mechanism rotatably connected to the lead screw 421.

[0081] Example 3: This embodiment provides another electric piano, including: a piano stand 1, piano keys 6 disposed on the piano stand 1, and an automatic opening and closing device for the cover module, as described in Embodiment 2 above, disposed on the piano stand 1 and located at both ends of the piano keys.

[0082] In some embodiments, a groove 7 extending along the length of the key 6 is provided on the piano stand 1 near the rear end of the key 6, and the front end of the cover plate module 2 after tilting is located at the rear end of the groove 7.

[0083] In some embodiments, a sensor 5 is provided at the front end of the piano stand 1 near the piano keys 6. The sensor 5 is electrically connected to the segmented drive module 4. When a human body approaches the piano stand 1, the segmented drive module 4 drives the cover plate module 2 to move to expose the piano keys 6.

[0084] In some embodiments, the electric piano further includes a mounting base 41 fixed to the piano stand 1, wherein one end of the mounting base 41 extending along the direction of the guide rail 43 is fixed to the guide rail 43.

[0085] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0086] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. An electric piano, characterized by comprising: include: A piano stand (1) is provided with piano keys (6), a cover plate module (2), a connector (3), and a segmented drive module (4); wherein the segmented drive module (4) includes: Guide rail (43), first link (431), second link (432), motor unit (42); The guide rail (43) has a limit member (44) at its rear end; the second connecting rod (432) is an arc shape that bends toward the first connecting rod (431); The guide rail (43) is provided with a first slider (433) and a second slider (434); and the first end of the first connecting rod (431) and the first end of the second connecting rod (432) are respectively connected to the first slider (433) and the second slider (434); The second end of the first connecting rod (431) and the second end of the second connecting rod (432) are respectively hinged to the connecting member (3), and the connecting member (3) is connected to the cover plate module (2); The output end of the motor unit (42) is connected to the first slider (433); When the cover plate module (2) is in the first movement stage, the motor unit (42) drives the first slider (433) to move along the front end of the guide rail (43) to the rear end of the guide rail (43). At this time, the second connecting rod (432) moves synchronously toward the rear end of the guide rail (43) under the driving action of the first connecting rod (431). At this time, the connecting piece (3) moves backward along the direction of the guide rail (43). The cover plate module (2) moves with the connecting piece (3) to expose the piano key (6). When the second slider (434) abuts against the limiting member (44), the cover plate module (2) moves from the first movement stage to the second movement stage. At this time, the second end of the first connecting rod (431) and the second end of the second connecting rod (432) rotate relative to the connecting member (3) so that the connecting member (3) rotates relative to the horizontal plane.

2. The electric piano of claim 1, wherein The first end of the second connecting rod (432) is hinged to the second slider (434).

3. The electric piano according to claim 1 or 2, characterized in that, The length of the first link (431) is less than the length of the second link (432).

4. The electric piano of claim 1, wherein In the first movement phase, the change in distance between the first slider (433) and the second slider (434) is less than 5% of the original initial distance; in the second movement phase, the distance between the first slider (433) and the second slider (434) shows a decreasing trend.

5. The electric piano according to claim 1, characterized in that, The cover module (2) includes: a lower shell (21) of a speaker that is fixedly connected to the connector (3) and can cover the piano keys (6), and an upper shell (22) of a speaker that covers the lower shell (21). The cover module (2) also includes: a speaker (23) disposed on the upper shell (22) and used for playing piano sounds.

6. The electric piano according to claim 1, characterized in that, The motor unit (42) includes: a lead screw (421) connected to the first slider (433) and capable of moving the first slider (433) along the guide rail (43), and a drive mechanism rotatably connected to the lead screw (421).

7. The electric piano of claim 1, wherein The piano stand (1) has a groove (7) extending along the length of the piano key (6) at the rear end near the piano key (6), and the front end of the cover plate module (2) after tilting is located at the rear end of the groove (7).

8. The electric piano of claim 1, wherein, A sensor (5) is provided at the front end of the piano stand (1) near the piano keys (6). The sensor (5) is electrically connected to the segmented drive module (4). When a human body approaches the piano stand (1), the segmented drive module (4) drives the cover plate module (2) to move to expose the piano keys (6).

9. The electric piano of claim 1, wherein Also includes: A mounting base (41) is fixed on the piano stand (1). One end of the mounting base (41) extending along the direction of the guide rail (43) is fixed to the guide rail (43), so that the guide rail (43) is away from the surface of the piano stand (1).

10. The electric piano of claim 5, wherein, The cover module (2) further includes a speaker decorative cover (24), which is fixed to the speaker upper shell (22) by a quick-release structure.

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