A key mechanism for an electronic keyboard

Abstract

This utility model relates to the field of electronic keyboard technology, and more particularly to a keyboard key device for an electronic keyboard, comprising multiple key components. Each key component includes a key body, a detection circuit board, multiple induction magnets (the same number as the key bodies and correspondingly disposed on each key body), multiple linear Hall elements (the same number as the induction magnets and correspondingly disposed below each induction magnet), and an elastic abutment block disposed below each key body for pressing upward against the key body. This utility model has both key playing speed detection and key after-touch pressure detection functions, while requiring fewer components and having a simpler structure. It can independently detect the playing speed of each key and independently detect the after-touch pressure of each key simultaneously, making it more suitable for various applications.

Description

Technical fields:

[0001] This utility model relates to the field of electronic keyboard technology, and in particular to a keyboard key device for electronic keyboards. Background technology:

[0002] An electronic keyboard is a keyboard instrument that generates and amplifies sound using electronic technology. To better simulate and perform the music, most existing electronic keyboard key mechanisms include key playing speed detection components and key aftertouch pressure detection components. In existing technology, the key playing speed detection component includes a silicone base located below the key, two contacts with a height difference on the silicone base, and a gold finger switch. When the key is not pressed, the two contacts on the silicone base are positioned above the gold finger switch. When a key is pressed, the silicone base is compressed as the key moves downwards, pressing the two contacts with the height difference onto the gold finger switch directly below them. The key movement speed is calculated by using the time difference created by the height difference between the two contacts, combined with a fixed distance difference. Since the force is proportional to the speed, the force can be represented by the speed. The key aftertouch pressure detection component includes a pressure-resistive diaphragm, which detects the aftertouch pressure after the key is pressed.

[0003] However, on the one hand, since the key playing speed detection component and the key aftertouch pressure detection component are used to detect the key playing speed and aftertouch pressure respectively, the overall required number of parts is large and the structure is relatively complex. On the other hand, since the pressure resistor film is installed under the key and is shared by all keys, it is impossible to independently detect the aftertouch pressure of each key, which has certain limitations in use. Utility Model Content:

[0004] The purpose of this invention is to provide a keyboard key device for electronic keyboards that addresses the shortcomings of existing technologies. While having functions for detecting key playing speed and key after-touch pressure, it requires fewer components and has a simpler structure, reducing installation difficulty and making the assembly process more convenient and efficient. It can independently detect the playing speed of each key and independently detect the after-touch pressure of each key, making it more suitable for various applications.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a keyboard device for an electronic keyboard, comprising multiple keyboard components, each keyboard component comprising a keyboard body, a detection circuit board, multiple sensing magnets of the same number as the keyboard bodies and respectively disposed on each keyboard body, multiple linear Hall elements of the same number as the sensing magnets and respectively disposed below each sensing magnet, and an elastic abutment disposed below each keyboard body and used to press against the keyboard body upwards, each linear Hall element being electrically connected to the detection circuit board.

[0006] A further improvement to the above solution is that each of the piano key bodies has a downward protruding pressing block at its bottom, and each pressing block is located above the elastic abutment block.

[0007] A further improvement to the above scheme is that the pressing block has a sheet-like structure, with the left-right direction of the pressing block being the width direction of the pressing block, the width of the pressing block being 5-15mm, and the front-back direction of the pressing block being the thickness direction of the pressing block, the thickness of the pressing block being 0.3-1mm.

[0008] A further improvement to the above solution is that the pressure block and the piano key body are integrally injection molded.

[0009] A further improvement to the above solution is that the elastic abutment is a sponge block.

[0010] A further improvement to the above scheme is that the vertical direction of the elastic block is taken as the thickness direction of the elastic block, and the thickness of the elastic block is 3-5mm.

[0011] A further improvement to the above scheme is that the width direction of the elastic block is defined as the front-to-back direction of the elastic block, and the width of the elastic block is 2-7mm.

[0012] A further improvement to the above solution is that each of the piano key bodies has a downwardly protruding magnet mounting block at its bottom, and each sensing magnet is respectively disposed on the magnet mounting block.

[0013] A further improvement to the above solution is that the bottom of the magnet mounting block is formed with a magnet mounting part for holding the induction magnet, and the induction magnet is snapped into the magnet mounting part.

[0014] A further improvement to the above solution is that the magnet mounting block and the piano key body are integrally injection molded.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a keyboard device for an electronic keyboard, including multiple keyboard components. Each keyboard component includes a keyboard body, a detection circuit board, multiple sensing magnets that are the same number as the keyboard bodies and are respectively disposed on each keyboard body, multiple linear Hall elements that are the same number as the sensing magnets and are respectively disposed below each sensing magnet, and an elastic abutment disposed below each keyboard body and used to press against the keyboard body upward. Each linear Hall element is electrically connected to the detection circuit board.

[0016] Compared to existing keyboard key mechanisms, this invention, when played, causes each key body to move downwards along with its corresponding sensing magnet when pressed. Corresponding linear Hall elements detect changes in the magnetic field in real time and output corresponding voltage signals. By collecting and analyzing these voltage signals, the slope of the voltage change curve is calculated, thus determining the key's playing speed. When the key body contacts the elastic stop block, the block compresses, and the linear Hall elements continue to sense changes in the magnetic field caused by the positional changes of the sensing magnets, outputting a voltage signal related to the post-touch pressure. This allows for precise control of each key's movement. This invention enables the independent detection of the aftertouch pressure of each piano key. Through the combination of an inductive magnet, a linear Hall element, and an elastic abutment, it can detect both the playing speed and the aftertouch pressure of each key. While possessing both functions, it requires fewer components and has a simpler structure, reducing installation difficulty and making assembly more convenient and efficient. It can independently detect both the playing speed and aftertouch pressure of each key simultaneously, making it more suitable for various applications. Attached image description:

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0019] Figure 3 This is a schematic diagram of the structure of the piano key body and the induction magnet of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Key assembly; 2. Key body; 3. Detection circuit board; 4. Induction magnet; 5. Linear Hall element; 6. Elastic stop block; 7. Pressing block; 8. Magnet mounting block; 9. Magnet mounting part. Detailed implementation method:

[0021] The present invention will be further described below with reference to the accompanying drawings, such as... Figure 1-3As shown, this utility model includes multiple key assemblies 1, each key assembly 1 including a key body 2, a detection circuit board 3, multiple induction magnets 4 (the same number as the key bodies 2, each corresponding to one on each key body 2), multiple linear Hall elements 5 (the same number as the induction magnets 4, each corresponding to one below each induction magnet 4), and elastic blocks 6 located below each key body 2 for pressing upward against the key body 2. Each linear Hall element 5 is electrically connected to the detection circuit board 3. Compared to existing key devices for electronic keyboards, in this utility model, when played, each key body 2, when pressed, causes the corresponding induction magnet 4 to move downward. The corresponding linear Hall elements 5 detect the magnetic field change in real time and output a corresponding voltage signal. By collecting and analyzing the voltage signal, the voltage change curve is calculated. The slope is used to obtain the playing speed of the piano key. When the piano key body 2 contacts the elastic block 6, the elastic block 6 begins to compress. The linear Hall element 5 continues to sense the change in magnetic field caused by the change in the position of the sensing magnet 4, and outputs a voltage signal related to the after-touch pressure, thereby realizing the detection of the independent after-touch pressure of each piano key. This utility model, through the cooperation of the sensing magnet 4, the linear Hall element 5, and the elastic block 6, can realize both the detection of the playing speed of the piano key and the detection of the after-touch pressure of the piano key. While having the functions of detecting the playing speed of the piano key and the after-touch pressure of the piano key, the overall number of required parts is small and the structure is relatively simple, reducing the difficulty of installation and making the assembly process more convenient and efficient. It can not only independently detect the playing speed of each piano key at the same time, but also independently detect the after-touch pressure of each piano key at the same time, making it more suitable for various application occasions.

[0022] Compared to the previous method that required two separate components for detecting key playing speed and key after-touch pressure, this invention simplifies the process to only require a sensing magnet 4, a linear Hall element 5, and an elastic stop block 6. This avoids errors caused by complex structures and effectively improves the stability and reliability of the entire device. In addition, the linear Hall element 5 itself has extremely high detection accuracy. Compared to the differences in contact resistance of silicone contacts in existing technologies and the 20% error of the pressure resistor film itself, the error of the linear Hall element 5 is extremely small. It can more accurately detect the voltage signal generated by the change of magnetic field during the movement of the keys, thereby accurately calculating the key playing speed and after-touch pressure, truly restoring the performer's playing force and intention, and bringing a better playing experience to the electronic keyboard.

[0023] Each of the piano key bodies 2 has a downward protruding pressing block 7 at its bottom, and each pressing block 7 is located above the elastic abutment block 6. Compared with the direct contact between the bottom of the piano key body 2 and the elastic abutment block 6, the present invention can better ensure the feel of the pressure after touch by setting the pressing block 7. The detection of the present invention is divided into two stages. The first stage of detection is when the pressing block 7 moves downward until it contacts the top of the elastic abutment block 6. At this time, the linear Hall element 5 detects the change in the height position of the sensing magnet 4 in real time and outputs a voltage signal for detecting the piano key playing speed. The second stage of detection is when the pressing block 7 continues to move downward after contacting the top of the elastic abutment block 6. At this time, the linear Hall element 5 detects the change in the height position of the sensing magnet 4 in real time and outputs a voltage signal for detecting the pressure after touch.

[0024] The pressing block 7 has a sheet-like structure. The width of the pressing block 7 is in the left-right direction, and the width of the pressing block 7 is preferably 5-15mm. The thickness of the pressing block 7 is in the front-back direction, and the thickness of the pressing block 7 is preferably 0.3-1mm, which can further ensure the feel of the pressure after touch.

[0025] The pressure block 7 and the piano key body 2 are integrally injection molded, which not only reduces the number of parts and makes assembly easier, but also makes the connection between the pressure block 7 and the piano key body 2 more secure and prevents them from falling off.

[0026] The elastic abutment 6 is set to press the piano key body 2 upward, thereby achieving the feel of pressure after touch. The elastic abutment 6 of this utility model is preferably a sponge block, which provides a better feel of pressure after touch. Of course, in other embodiments, the elastic abutment 6 can also be a silicone block, a rubber block, etc.

[0027] The thickness of the elastic abutment 6 is preferably 3-5mm, with the vertical direction of the elastic abutment 6 as its thickness direction. The width of the elastic abutment 6 is preferably 2-7mm, with the front-back direction of the elastic abutment 6 as its width direction, resulting in a better overall feel. In addition, the elastic abutment 6 of this utility model is an integral structure, which is used to support the upward movement of each key body 2. The overall number of parts is small and easy to assemble. Of course, in other embodiments, the elastic abutment 6 can also be multiple small blocks that are respectively and correspondingly set below each key body 2.

[0028] Each of the piano key bodies 2 has a downward protruding magnet mounting block 8 at its bottom. Each induction magnet 4 is respectively set on the magnet mounting block 8. The magnet mounting block 8 and the piano key body 2 are integrally injection molded. This not only reduces the number of parts and makes assembly easier, but also makes the connection between the magnet mounting block 8 and the piano key body 2 more secure and prevents them from falling off.

[0029] The bottom of the magnet mounting block 8 is formed with a magnet mounting part 9 for holding the induction magnet 4 in place. The induction magnet 4 is snapped into the magnet mounting part 9. Compared with installing the induction magnet 4 by gluing, not only does gluing require a curing time and have low overall installation efficiency, but the glue application is also prone to uneven thickness, resulting in height differences between the induction magnets 4 and difficulty in ensuring consistent glue application position, which can easily lead to misalignment. This results in poor consistency in the installation position of the induction magnet 4 at the bottom of the piano key body 2. This utility model achieves the installation of the induction magnet 4 by snapping it into the magnet mounting part 9. This not only enables the quick installation of each induction magnet 4, but also ensures good consistency in the installation height and position of each induction magnet 4, thereby enabling better detection.

[0030] Working principle:

[0031] When each key body 2 is pressed, it causes the corresponding sensing magnet 4 to move downwards. The corresponding linear Hall element 5 detects the magnetic field change in real time and outputs a corresponding voltage signal. By collecting and analyzing the voltage signal, the slope of the voltage change curve is calculated, thereby obtaining the playing speed of the key. When the key body 2 contacts the elastic block 6, the elastic block 6 begins to compress. The linear Hall element 5 continues to sense the magnetic field change caused by the change in the position of the sensing magnet 4 and outputs a voltage signal related to the after-touch pressure, thereby realizing the detection of the independent after-touch pressure of each key. This utility model, through the cooperation of the sensing magnet 4, the linear Hall element 5, and the elastic block 6, can realize both the detection of key playing speed and the detection of key after-touch pressure. While having the functions of key playing speed detection and key after-touch pressure detection, the overall number of required parts is small and the structure is relatively simple, reducing the difficulty of installation and making the assembly process more convenient and efficient. It can not only independently detect the playing speed of each key at the same time, but also independently detect the after-touch pressure of each key at the same time, making it more suitable for various applications.

[0032] Of course, the above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A key arrangement for an electronic piano, comprising a plurality of key assemblies (1), each of said key assemblies (1) comprising a key body (2), characterized in that: It also includes a detection circuit board (3), a number of induction magnets (4) that are the same as the number of piano key bodies (2) and are respectively arranged on each piano key body (2), a number of linear Hall elements (5) that are the same as the number of induction magnets (4) and are respectively arranged below each induction magnet (4), and an elastic abutment (6) arranged below each piano key body (2) and used to press against the piano key body (2) upward. Each linear Hall element (5) is electrically connected to the detection circuit board (3).

2. The keyboard device for an electronic keyboard according to claim 1, characterized in that: Each of the piano key bodies (2) has a downward protruding pressing block (7) at its bottom, and each pressing block (7) is located above the elastic abutment block (6).

3. The key arrangement for an electronic keyboard according to claim 2, wherein: The pressing block (7) is a sheet-like structure. The left-right direction of the pressing block (7) is the width direction of the pressing block (7), and the width of the pressing block (7) is 5-15mm. The front-back direction of the pressing block (7) is the thickness direction of the pressing block (7), and the thickness of the pressing block (7) is 0.3-1mm.

4. The key arrangement for an electronic keyboard according to claim 2, wherein: The pressure block (7) and the piano key body (2) are integrally injection molded.

5. The key arrangement for an electronic keyboard according to claim 1, wherein: The elastic abutment (6) is a sponge block.

6. The key arrangement for an electronic keyboard according to claim 1 or 5, wherein: The thickness direction of the elastic block (6) is defined by the vertical direction of the elastic block (6), and the thickness of the elastic block (6) is 3-5 mm.

7. The key arrangement of claim 6, wherein: The width direction of the elastic block (6) is defined by the front-back direction of the elastic block (6), and the width of the elastic block (6) is 2-7mm.

8. A keyboard device for an electronic keyboard according to claim 1, characterized in that: Each of the piano key bodies (2) has a downward protruding magnet mounting block (8) at its bottom, and each sensing magnet (4) is respectively mounted on the magnet mounting block (8).

9. The key arrangement of claim 8, wherein: The bottom of the magnet mounting block (8) is formed with a magnet mounting part (9) for mounting the induction magnet (4), and the induction magnet (4) is engaged in the magnet mounting part (9).

10. A keyboard device for an electronic keyboard according to claim 8, characterized in that: The magnet mounting block (8) and the piano key body (2) are integrally injection molded.

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