Electronic musical instrument keyboard

Abstract

The utility model provides an electronic musical instrument keyboard, including the face shell and bottom shell who butt joint into the casing, still include gyro wheel support structure, be located in the bottom shell inside, functional potentiometer, rotatable installation in gyro wheel support structure, cross section is semicircular functional gyro wheel, functional gyro wheel bottom direct surface sinks in the bottom shell inside, functional gyro wheel top stretches out the face shell upwards, functional gyro wheel center installation in functional potentiometer, gyro wheel reset spare, connect in gyro wheel support structure and functional gyro wheel between, reset buffer spare, be located in gyro wheel reset spare and gyro wheel support structure junction. The utility model provides electronic musical instrument keyboard under the diameter and rotation angle stroke limit optimization functional gyro wheel layout, realize MIDI keyboard thinning and portable, eliminate the larger rebound noise of shorter elastic arm in the limited space, satisfy individualized color selection while reducing the cost, realize assembly tolerance control, avoid partial deformation, warping in the assembly process, realize circuit board device integration module stacking and guarantee the plug assembly in place.

Description

Technical Field

[0001] This utility model relates to the field of MIDI keyboard technology, and in particular to an electronic musical instrument keyboard. Background Technology

[0002] With the improvement of living standards, people now pay attention not only to the form of entertainment but also to its content and meaning. As entertainment shifts from passive reception to active creation, electronic music equipment has emerged and developed accordingly. MIDI keyboards, as one of the core electronic music devices in modern music creation, are experiencing increasing market demand due to their advantages such as high creative efficiency, rich musicality, and ease of editing, teaching, composing, and performing. With the growing user base, MIDI keyboards are also evolving towards lighter and more personalized designs, more powerful and professional functions, and simpler operation.

[0003] However, MIDI keyboards currently still have the following drawbacks:

[0004] I. Currently, MIDI keyboards with mechanical modulation / pitch bend wheels are relatively thick and heavy. This is due to the rotation diameter and mechanical structure of the mechanical modulation / pitch bend wheels themselves. To make the products thinner and more portable, the mainstream solutions are: ① Replacing the mechanical modulation / pitch bend wheels with capacitive touch strips, but the user experience is poor; ② Optimizing and improving the mechanical structure and electronic component layout to retain the user experience of the mechanical modulation / pitch bend wheels while meeting the demand for thinness and portability. However, to maintain a good operating experience, the diameter and rotation angle of the function wheel cannot be arbitrarily reduced. The main reason is that in human-computer interaction, a rotation angle travel that is too small cannot meet the MIDI data ADC quantization acquisition requirements. Therefore, the industry standard for the rotation angle travel of the function wheel is usually 30 degrees in one direction. On the other hand, since the diameter of the user's fingertip is usually 15-18mm, this also indirectly determines that the diameter of the function wheel is generally 46-50mm in the industry. Therefore, how to optimize the mechanical structure layout of the function wheel and electronic components within the constraints of diameter and rotation angle travel to achieve thinner and more portable MIDI keyboards is one of the problems that urgently needs to be solved in this field.

[0005] II. MIDI keyboard function wheels often require an automatic return-to-center spring mechanism. Whether it's a torsion spring or a tension spring, a shorter spring arm results in greater amplitude and rebound noise. To reduce spring amplitude, current technologies typically increase the number of coils or reduce the spring angle. To ensure the automatic return-to-center performance of the function wheel, the industry standard spring angle is usually 70 degrees to guarantee sufficient rebound force. However, increasing the number of coils has significant limitations within a limited space. Therefore, how to eliminate the significant rebound noise generated by shorter spring arms within a limited space is one of the urgent problems to be solved in this field.

[0006] Third, due to the large size of MIDI keyboards, the cost of offering a wide range of colors to meet personalized needs is high; the structural features and components distributed in various positions and shapes on large-size circuit boards, coupled with the need for increased wall thickness for large-size products, make it difficult to control the cumulative assembly tolerances, requiring high precision in product assembly dimensions, and making it easy for local deformation and warping to occur during the assembly process, and making it difficult to stack integrated circuit board components and connect and assemble accessories in place. Utility Model Content

[0007] This invention proposes an electronic musical instrument keyboard to solve the technical problems of existing MIDI keyboards, which are difficult to thin and portable under the premise of limited function wheel diameter and rotation angle travel, and are difficult to eliminate the large rebound noise generated by short elastic arms in a limited space.

[0008] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0009] The electronic musical instrument keyboard provided by this utility model includes a front shell and a bottom shell that are connected to each other to form a housing. The electronic musical instrument keyboard also includes:

[0010] The roller support structure is located inside the bottom shell;

[0011] A functional potentiometer is rotatably mounted on a roller support structure;

[0012] The function roller has a semi-circular cross-section. The bottom of the function roller is recessed into the bottom shell, and the top of the function roller extends upward out of the top shell. The center of the function roller is mounted on the function potentiometer.

[0013] A roller reset component connects the roller support structure and the functional roller.

[0014] A reset buffer is located at the connection between the roller reset component and the roller support structure.

[0015] Preferably, one end of the functional potentiometer is provided with a mounting shaft, and the center of the functional roller is fitted onto the mounting shaft;

[0016] The roller reset component is a reset spring, which is sleeved on the mounting shaft and abuts against the functional roller. A pair of reset buffer components are spaced apart on the roller support structure and matched with the two leads of the reset spring. The two leads of the reset spring are respectively connected to a pair of reset buffer components.

[0017] Furthermore, electronic musical instrument keyboards also include:

[0018] A pair of limiting buffers are spaced apart on the roller support structure. They are used to cooperate with the two ends of the bottom straight surface to limit the forward and reverse rotation angles of the functional roller and to provide buffer for the roller reset component when contacting the functional roller.

[0019] Preferably, the roller support structure includes:

[0020] A supporting vertical plate is provided with a first base extending vertically from the middle of the bottom end of the supporting vertical plate. A pair of second bases extending vertically from the first base are provided on both sides of the bottom end of the supporting vertical plate at intervals. The supporting vertical plate is installed inside the bottom shell through the first base and the pair of second bases.

[0021] The limiting buffer is located at the top of the second base, and a pair of reset buffers are located on opposite sides of the first base facing the pair of second bases.

[0022] Preferably, the functional potentiometer is provided with limiting protrusions at intervals on the same end of the mounting shaft;

[0023] A pair of screw mounting seats that extend perpendicularly out of the support vertical plate from the first base are provided on one side of the support vertical plate at intervals. The screw mounting seats are provided with screw connection holes. A shaft hole that matches the mounting shaft and a potentiometer limiting hole that matches the limiting protrusion are provided at intervals in the middle of the support vertical plate.

[0024] The bottom surface of the faceplate is provided with a roller limiting post that matches the screw mounting base. The roller limiting post is provided with a screw limiting hole that matches the screw connection hole and a roller clearance hole that matches the shape of the functional roller. Several roller limiting ribs are provided at intervals around the roller clearance hole on the bottom surface of the faceplate.

[0025] The support vertical plate is fastened to the face shell by connecting screws passing through the corresponding screw connection holes and screw limit holes. The functional potentiometer is rotatably mounted on the support vertical plate through the mounting base through the shaft hole. The top of the functional rollers passes through the inner side of each roller limit rib and the roller clearance hole and extends out of the face shell.

[0026] Preferably, the contact surface between the lead-out end and the reset buffer is coated with grease.

[0027] Preferably, the limiting buffer and the reset buffer are made of EVA cushioning foam or silicone.

[0028] Preferably, there are two roller support structures, and the two roller support structures are spaced apart inside the bottom shell;

[0029] There are two functional potentiometers, namely a pitch bend potentiometer and a modulation potentiometer, which are rotatably mounted on a pair of roller support structures.

[0030] There are two function rollers: a pitch bend roller and a modulation roller. The corresponding centers of the pitch bend roller and the modulation roller are respectively mounted on the pitch bend potentiometer and the modulation potentiometer.

[0031] Furthermore, the faceplate includes a functional area located at one end of the faceplate for mounting the function knobs and function keys of the electronic musical instrument keyboard. The functional area forms an inlay groove recessed from the top surface of the faceplate, and the bottom surface of the inlay groove is provided with a plurality of knob through holes and key through holes penetrating the faceplate.

[0032] Electronic musical instrument keyboards also include:

[0033] The face cover is shaped to match the inlay groove. At least four positioning posts and at least four positioning buckles are evenly distributed on the bottom surface of the face cover. The face cover is provided with knob clearance holes and button clearance holes that match the knob through holes and button through holes respectively. The bottom surface of the inlay groove is provided with post limiting holes and limiting slots that match the positioning posts and positioning buckles respectively.

[0034] The cover is embedded in the inlay groove by means of positioning pins and positioning buckles, which respectively cooperate with the pin limiting holes and limiting slots of the pin body.

[0035] Preferably, the diameters of the knob through hole and the button through hole are larger than the knob clearance hole and the button clearance hole, respectively. The inner side wall of the face shell is provided with an interface clearance groove at the transmission interface of the electronic musical instrument keyboard circuit board. The outer side wall of the face shell is provided with a data line clearance groove surrounding the data line clearance hole of the data interface of the circuit board. The face shell is also provided with a switch mounting hole, and the outer side wall of the face shell is provided with a switch clearance groove surrounding the switch mounting hole.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The electronic musical instrument keyboard provided by this utility model optimizes the structural layout of the function scroll wheel and electronic components within the limits of diameter and rotation angle travel, thereby achieving a thinner and more portable MIDI keyboard; it eliminates the large rebound noise of the shorter elastic arm within a limited space; it allows for personalized color selection while reducing costs; it achieves assembly tolerance control, avoids local deformation and warping during the assembly process, and enables integrated module stacking of circuit board components while ensuring proper plug-in assembly. Attached Figure Description

[0038] To more clearly illustrate the technical solution proposed by this utility model, the present utility model will be described in detail below with reference to the embodiments and accompanying drawings. It should be understood that the embodiments and accompanying drawings described in the following detailed description are merely some embodiments of this utility model, and those skilled in the art can make changes to these drawings under the concept of this utility model.

[0039] Figure 1 A three-dimensional schematic diagram of the assembly structure of an embodiment of the electronic musical instrument keyboard provided by this utility model;

[0040] Figure 2 Exploded three-dimensional schematic diagram of an embodiment of the electronic musical instrument keyboard provided by this utility model Figure 1 ;

[0041] Figure 3 A three-dimensional structural diagram of the assembly of the functional potentiometer, functional roller, and roller support structure of an embodiment of the electronic musical instrument keyboard provided by this utility model;

[0042] Figure 4 An exploded perspective view of the functional potentiometer, functional roller, and roller support structure of an embodiment of the electronic musical instrument keyboard provided by this utility model;

[0043] Figure 5 A three-dimensional structural diagram of the roller support structure of an embodiment of the electronic musical instrument keyboard provided by this utility model. Figure 1 ;

[0044] Figure 6 A three-dimensional structural diagram of the roller support structure of an embodiment of the electronic musical instrument keyboard provided by this utility model. Figure 2 ;

[0045] Figure 7 for Figure 1 A cross-sectional view of the keyboard of an electronic musical instrument.

[0046] Figure 8 for Figure 7 A magnified schematic diagram of a portion of the A region of an electronic musical instrument keyboard;

[0047] Figure 9 for Figure 7 A cross-sectional view of the function scroll wheel of an electronic musical instrument keyboard, rotated 30 degrees counterclockwise.

[0048] Figure 10 A schematic diagram of the assembly of the roller support structure and roller reset component of another embodiment of the electronic musical instrument keyboard provided by this utility model;

[0049] Figure 11 Exploded three-dimensional schematic diagram of an embodiment of the electronic musical instrument keyboard provided by this utility model Figure 2 ;

[0050] Figure 12 for Figure 11 A magnified schematic diagram of the local structure of region B in the diagram;

[0051] Figure 13 An exploded perspective view of the top cover and the top shell of an embodiment of the electronic musical instrument keyboard provided by this utility model;

[0052] Figure 14 A three-dimensional structural diagram of the cover of an embodiment of the electronic musical instrument keyboard provided by this utility model;

[0053] Figure 15 A schematic diagram of the three-dimensional structure of the circuit board of an embodiment of the electronic musical instrument keyboard provided by this utility model. Figure 1 ;

[0054] Figure 16 A schematic diagram of the three-dimensional structure of the circuit board of an embodiment of the electronic musical instrument keyboard provided by this utility model. Figure 2 .

[0055] The main markings in the attached figures are as follows:

[0056] 1. Front shell; 11. Roller limiting post; 111. Screw limiting hole; 12. Roller clearance hole; 13. Roller limiting rib; 131. Roller limiting groove; 14. Functional area; 141. Inlay groove; 142. Knob through hole; 143. Button through hole; 144. Column limiting hole; 145. Limiting slot; 15. Interface clearance groove; 16. Data cable clearance hole; 17. Switch mounting hole; 171. Switch clearance groove; 18. Key area; 19. Switch accessories; 2. Bottom shell; 21. Support feet; 3. Roller support structure; 31. Support vertical plate; 311. Potentiometer wiring groove; 32. First base; 321. Chamfered surface; 33. Second base 34. Screw mounting base; 341. Screw connecting hole; 35. Shaft hole; 36. Potentiometer limiting hole; 37. Limiting ramp; 4. Function potentiometer; 41. Pitch bending potentiometer; 42. Modulation potentiometer; 43. Mounting shaft; 5. Functional roller; 51. Bottom straight surface; 52. Top curved surface; 53. Pitch bending roller; 54. Modulation roller; 6. Roller reset component; 61. Lead-out end; 7. Reset buffer component; 8. Limiting buffer component; 9. Cover; 91. Positioning post; 92. Positioning buckle; 93. Knob clearance hole; 94. Button clearance hole; 101. Knob assembly; 102. Button assembly; 103. Circuit board; 104. Key assembly. Detailed Implementation

[0057] Please refer to the following: Figure 1-16 The electronic musical instrument keyboard provided by this utility model includes a front shell 1 and a bottom shell 2 that are connected to each other to form a housing. The electronic musical instrument keyboard also includes:

[0058] The roller support structure 3 is located inside the bottom shell 2; the functional potentiometer 4 is rotatably mounted on the roller support structure 3; the functional roller 5 has a semi-circular cross-section perpendicular to its axial direction, the bottom straight surface 51 of the functional roller 5 is recessed inside the bottom shell 2, the top arc surface 52 of the functional roller 5 extends upward out of the shell 1, and the center of the functional roller 5 is mounted on the functional potentiometer 4; the roller reset member 6 is connected between the roller support structure 3 and the functional roller 5; and the reset buffer member 7 is located at the connection between the roller reset member 6 and the roller support structure 3.

[0059] Please refer to the following: Figure 1-2In this embodiment, the electronic musical instrument keyboard is a MIDI keyboard. Two roller support structures 3 are provided, spaced apart inside the bottom shell 2. Two functional potentiometers 4 are provided: a pitch bend potentiometer 41 and a modulation potentiometer 42, each rotatably mounted on a pair of roller support structures 3. Two functional rollers 5 are provided: a pitch bend roller 53 and a modulation roller 54, with their corresponding centers mounted on the pitch bend potentiometer 41 and the modulation potentiometer 42, respectively. A pair of support feet 21 are spaced apart on the bottom surface of the bottom shell 2 to prevent slipping and scratches.

[0060] In other embodiments (not shown in the figures), the roller support structure 3 may also be provided in more than three parts, and correspondingly, the functional potentiometer 4 may be provided in more than three parts, including one pitch bend potentiometer 41 and two or more modulation potentiometers 42, or one modulation potentiometer 42 and two or more pitch bend potentiometers 41. The functional roller 5 may be provided in three parts, including one pitch bend roller 53 and two or more modulation rollers 54, or one modulation roller 54 and two or more pitch bend rollers 53.

[0061] Please refer to the following: Figure 1-2 In this embodiment, the diameter of the function roller 5 is 46.7mm, and the distance from the center of the function roller 5 to the top surface of the top shell 1 (i.e., from the center of the function roller 5 to the top surface of the cover 9 embedded in the top of the top shell 1) is 14.7mm. To meet the rotation angle travel of the function roller 5, the height of the highest point of the top arc surface 52 of the function roller 5 extending out of the top shell 1 (i.e., the distance from the highest point of the top arc surface 52 of the function roller 5 to the top surface of the cover 9 embedded in the top of the top shell 1) is 11.6mm. This maximizes the compression of the height of the highest point of the top arc surface 52 of the function rollers 5, such as the pitch bend roller 53 and the modulation roller 54, extending out of the top shell 1 without changing the overall thickness of the shell formed by the connection of the top shell 1 and the bottom shell 2, thus meeting the user's demand for thinner and more portable MIDI keyboards.

[0062] Meanwhile, the electronic musical instrument keyboard provided by this utility model sets a reset buffer 7 at the connection between the roller reset component 6 and the roller support structure 3. Without increasing the number of turns or reducing the spring angle, and without satisfying the automatic centering performance, it achieves buffering and absorption of the rebound force of the reset spring (roller reset component 6), thereby eliminating the large rebound noise generated by the large amplitude of the short spring arm itself in a limited space and improving the MIDI keyboard experience.

[0063] Please refer to the following: Figure 1-4 7-9, In ​​this embodiment, the electronic musical instrument keyboard further includes:

[0064] A pair of limiting buffers 8 are spaced apart on the roller support structure 3 and are respectively used to cooperate with the two ends of the bottom straight surface 51 to limit the forward and reverse (i.e. clockwise and counterclockwise) rotation angle of the functional roller 5, and provide buffer for the roller reset component 6 when contacting the functional roller 5, so as to further buffer and absorb the spring rebound force while satisfying the automatic return performance.

[0065] Please refer to the following: Figure 1-4 In the preferred embodiment of this example, the functional potentiometer 4 has a mounting shaft 43 at one end, and the center of the functional roller 5 is fitted onto the mounting shaft 43. The roller reset component 6 is a reset spring, which is sleeved on the mounting shaft 43 and abuts against the functional roller 5. A pair of reset buffers 7 are spaced apart on the roller support structure 3 and matched with the two leads 61 of the reset spring (roller reset component 6). The two leads 61 of the reset spring (roller reset component 6) are respectively connected to the pair of reset buffers 7.

[0066] In a preferred embodiment of this invention, the limiting buffer 8 and the reset buffer 7 are made of EVA cushioning foam or silicone material.

[0067] Please refer to the following: Figure 1-9 As a preferred embodiment of this invention, the limiting buffer 8 and the reset buffer 7 are respectively made of EVA buffer foam. A pair of limiting buffer pads (limiting buffers 8) are attached to the roller support structure 3 at intervals parallel to the bottom surface of the bottom shell 2 and the top surface of the top shell 1. The positions of the pair of limiting buffer pads (limiting buffers 8) are respectively matched to the end positions of the rotation angle travel of the bottom straight surface 51 of the functional roller 5 when it rotates 30 degrees clockwise and counterclockwise from the horizontal position (that is, the angle between the bottom straight surface 51 of the functional roller 5 and the bottom surface of the bottom shell 2 and the top surface of the top shell 1 is ±30 degrees), so that the pair of limiting buffer pads (limiting buffers 8) respectively limit the ±30 degree rotation angle travel of the functional roller 5.

[0068] Please refer to the following: Figure 1-9 In this embodiment, the roller support structure 3 includes:

[0069] The support vertical plate 31 is preferably made of injection molding. The bottom center of the support vertical plate 31 is provided with a first base 32 that extends vertically out of the support vertical plate 31. The bottom end of the support vertical plate 31 is provided with a pair of second bases 33 that extend vertically out of the support vertical plate 31 in the same direction as the first base 32 on both sides. The support vertical plate 31 is installed inside the bottom shell 2 through the first base 32 and the pair of second bases 33.

[0070] The limiting buffer 8 is located at the top of the second base 33, and a pair of reset buffers 7 are located on opposite sides of the first base 32 facing the pair of second bases 33.

[0071] Please refer to the following: Figure 1-9 In a preferred embodiment, the functional potentiometer 4 has a limiting protrusion (not shown in the figure) spaced apart on the same end of the mounting shaft 43. A pair of screw mounting seats 34, extending perpendicularly outward from the first base 32 and opposite to the supporting vertical plate 31, are spaced apart on one side of the supporting vertical plate 31. Each screw mounting seat 34 has a screw connection hole 341. The supporting vertical plate 31 has a shaft hole 35 matching the mounting shaft 43 and a potentiometer limiting hole 36 matching the limiting protrusion, spaced apart at the middle.

[0072] The bottom surface of the face shell 1 facing the bottom shell 2 is provided with a roller limiting post 11 that matches the screw mounting base 34, and a roller clearance hole 12 that matches the shape of the functional roller 5. The roller limiting post 11 is provided with a screw limiting hole 111 that matches the screw connection hole 341. A number of roller limiting ribs 13 are arranged at intervals around the roller clearance hole 12 on the bottom surface of the face shell 1. Each roller limiting rib 13 and the face shell 1 form a roller limiting groove 131 located inside each roller limiting rib 13.

[0073] The support plate 31 is fastened to the face shell 1 by connecting screws passing through the corresponding screw connection holes 341 and screw limiting holes 111. The functional potentiometer 4 is rotatably mounted on the support plate 31 by passing through the shaft hole 35 through the mounting base. The top arc surface 52 of the functional roller 5 passes through the roller limiting groove 131 and roller clearance hole 12 inside each roller limiting rib 13 and extends out of the face shell 1.

[0074] Please see Figure 10 In another embodiment of the electronic musical instrument keyboard provided by this utility model, the supporting vertical plate 31 does not have a first base 32, and the second base 33 has a limiting inclined plate 37 on one side facing the other second base 33. The angle between the pair of limiting inclined plates and the vertical direction perpendicular to the bottom surface of the bottom shell 2 and the top surface of the top shell 1 is ±70 degrees. A pair of reset buffers 7 are provided, and the pair of reset buffers 7 are a pair of reset buffer pads that are attached parallel to the pair of limiting inclined plates. This can also achieve the buffering and absorption of the rebound force of the roller reset member 6.

[0075] To achieve a compact structure for the MIDI keyboard, the gap between the operating surfaces of the function wheels 5, such as the pitch bend wheel 53 and the modulation wheel 54, and the rest of the MIDI keyboard structure must be kept within 0.5mm. If the mounting bases of the function wheels 5, such as the pitch bend wheel 53 and the modulation wheel 54, are slightly off, it is very easy to cause interference with the function wheels 5.

[0076] The electronic musical instrument keyboard provided by this utility model uses a plastic support vertical plate 31, which serves as the main body of the roller support structure 3, to be fixed to the front shell 1 by reverse interlocking. Specifically, the roller limiting post 11 on the bottom surface of the front shell 1 is inserted into the screw mounting seat 34 of the support vertical plate 31. At the same time, the main support surface of the functional roller 5 is inserted upward into the roller limiting groove 131 on the inner side of each roller limiting rib 13 on the bottom surface of the front shell 1. Finally, the support vertical plate 31 is fastened to the front shell 1 by connecting screws passing through the corresponding screw connection hole 341 and screw limiting hole 111. This makes the roller support structure 3 and the front shell 1 precisely and stably fixed by reverse interlocking.

[0077] Furthermore, the electronic musical instrument keyboard provided by this utility model horizontally connects and fixes functional potentiometers 4, such as pitch bend potentiometers 41 and modulation potentiometers 42, to the support vertical plate 31, which serves as the main body of the roller support structure 3. Compared with the traditional method of vertically connecting and fixing functional potentiometers 4 to the mounting base with springs having sufficiently long shock-absorbing arms, this method can use springs with shorter elastic arms to adapt to the compact internal space of thinner and smaller MIDI keyboards, while meeting the extreme size requirements of functional potentiometers 4 and roller support structure 3. This, combined with the scheme of the highest point of the top arc surface 52 of the compression function roller 5 extending beyond the height of the front shell 1, further meets the user's demand for thinner and more portable MIDI keyboards.

[0078] Please refer to the following: Figure 1-9 In a preferred embodiment, the first base 32 has a pair of chamfered surfaces 321 on opposite sides of the pair of second bases 33, and the angles between the pair of chamfered surfaces 321 and the vertical direction perpendicular to the bottom surface of the bottom shell 2 and the top surface of the top shell 1 are ±70 degrees. A pair of reset buffer pads (reset buffer members 7) are respectively attached parallel to the pair of chamfered surfaces 321, so that the positions of the pair of reset buffer pads (reset buffer members 7) are respectively matched with the bottom straight surface 51 of the functional roller 5 in a horizontal posture (i.e., the bottom straight surface 51 of the functional roller 5 and the bottom surface of the bottom shell 2). When the angle between the top surface of the bottom shell 2 and the top surface of the top shell 1 is 0 degrees, the angle between the two leads 61 of the return spring (roller return member 6) and the vertical direction perpendicular to the bottom surface of the bottom shell 2 and the top surface of the top shell 1 (±70 degrees respectively) ensures that during the ±30 degree rotation angle stroke of the functional roller 5, one of the return buffer pads (return buffer member 7) is always in contact with one of the leads 61 of the return spring (roller return member 6) that swings downwards. Under the premise of satisfying the automatic return-to-center performance, it further buffers and absorbs the spring's rebound force.

[0079] In a preferred embodiment of this invention, the contact surfaces of the two leads 61 of the return spring (roller return member 6) and the return buffer member 7 are coated with grease to further buffer and absorb the spring's rebound force while satisfying the automatic return-to-center performance.

[0080] In one embodiment of this invention, the return spring is a torsion spring.

[0081] In another embodiment of this invention, the return spring is a compression spring.

[0082] Please refer to the following: Figure 2-6 As a preferred embodiment of this invention, a potentiometer wiring groove 311 is provided on one side of the support vertical plate 31.

[0083] Please refer to the following: Figure 1-2 In this embodiment, the faceplate 1 includes a functional area 14 located at one end of the faceplate 1 for mounting a function knob (knob assembly 101) and function keys (key assembly 102) of an electronic musical instrument keyboard. The functional area 14 has an inlay groove 141 recessed from the top surface of the faceplate 1. The bottom surface of the inlay groove 141 is provided with a plurality of knob through holes 142 and key through holes 143 penetrating the faceplate 1.

[0084] Electronic musical instrument keyboards also include:

[0085] The face cover 9 is shaped to match the inlay groove 141. At least four positioning posts 91 and at least four positioning buckles 92 are evenly distributed on the bottom surface of the face cover 9. The face cover 9 is provided with knob clearance holes 93 and button clearance holes 94 that match the respective knob through holes 142 and button through holes 143. The bottom surface of the inlay groove 141 is also provided with column limiting holes 144 and limiting slots 145 that match the respective positioning posts 91 and positioning buckles 92.

[0086] The cover 9 is fitted into the inlay groove 141 by each positioning post 91 and positioning buckle 92 respectively cooperating with the corresponding column limiting hole 144 and limiting slot 145.

[0087] Traditional MIDI keyboards have relatively limited color options, mainly because MIDI keyboards are relatively large. Offering a wider range of colors to meet individual needs would increase the cost of MIDI keyboards.

[0088] To solve the above problems, the electronic musical instrument keyboard provided by this utility model splits the traditional one-piece shell 1 into a main body shell 1 and a decorative body cover 9 embedded on the top surface of the main body shell 1. The decorative body cover 9 can be configured with different colors according to user needs, satisfying users' personalized decoration needs with a slight increase in cost.

[0089] The traditional monolithic front cover 1 is divided into a main color body front cover 1 and a decorative color body cover 9 embedded on the top surface of the main color body front cover 1. Due to the relatively long overall size of the MIDI keyboard and the many structural features distributed on the cover 9, the assembly dimensional accuracy requirements between the cover 9 and the front cover 1 are relatively high (cumulative assembly tolerances are prone to exceed limits), and the assembly process is also prone to local deformation and warping due to assembly inaccuracies. To avoid this problem, the manufacturing process of the cover 9 can adopt a film bonding solution or an acrylic machining solution. The film bonding solution has a lower process cost, but it sacrifices the product's aesthetic appeal; while the acrylic machining solution is more expensive. In addition, regardless of whether the cover 9 is fixed to the front cover 1 by adhesive or screws, there is a certain risk of the cover 9 loosening during long-term use of the MIDI keyboard.

[0090] The electronic musical instrument keyboard provided by this utility model uses a faceplate 9 that is fitted with at least four positioning pins 91 and positioning buckles 92 to at least four pin limiting holes 144 and limiting slots 145 on the face shell 1. Furthermore, the faceplate 9, positioning pins 91, and positioning buckles 92 are integrally molded using a mold injection molding process. This achieves cost control while ensuring uniform wall thickness of the faceplate 9. At least four positioning pins 91 are added to the areas with the most structural features on the bottom surface of the faceplate 9 and to the two sides of the bottom surface of the faceplate 9. Simultaneously, the face shell 1 is fitted with at least four pin limiting holes 144 and at least four limiting slots 145 to match the positioning pins 91 and positioning buckles 92. This ensures the assembly accuracy and stable connection of important features between the faceplate 9 and the face shell 1, and transforms overall assembly tolerances between the faceplate 9 and the face shell 1 into localized tolerances, preventing warping and deformation of the faceplate 9 edges due to excessive cumulative overall assembly tolerances.

[0091] As a preferred embodiment of this example, in order to achieve size control of the cover 9 of the electronic musical instrument keyboard, the mold cooling and glue injection are controlled before injection molding. The mold is required to adopt multi-channel direct water cooling + hot runner glue injection, so that the cover 9 is heated and pressured evenly during the molding process, so as to achieve precise control of the deformation and size of the cover 9.

[0092] Please refer to the following: Figure 1-2 In this embodiment, the diameters of the knob through-hole 142 and the key through-hole 143 are larger than the knob clearance hole 93 and the key clearance hole 94, respectively. The inner sidewall of the faceplate 1 has a recessed interface clearance groove 15 at the transmission interface of the circuit board 103 of the electronic musical instrument keyboard. The outer sidewall of the faceplate 1 has a recessed data cable clearance groove (not shown in the figure) surrounding the data cable clearance hole of the data interface of the circuit board 103. The faceplate 1 also has a switch mounting hole 17, and the outer sidewall of the faceplate 1 has a recessed switch clearance groove 171 surrounding the switch mounting hole 17. The circuit board 103 is used to connect and control the various components of the electronic musical instrument keyboard.

[0093] The traditional MIDI keyboard's circuit board 103 (PCBA mainboard) has a low degree of modular integration. The core reason is that professional MIDI keyboards are relatively large in size, and the various structural features and components distributed across the large circuit board 103 make it difficult to integrate the circuit board 103 with these components into a single modular stack. Furthermore, the need to assemble different types of power components, switching accessories 19, data cables, and other accessories, coupled with the diverse shapes and locations of components on the large circuit board 103, often leads to inconsistencies in component and accessory assembly. Simultaneously, the large circuit board 103 and its multiple mounted components necessitate a thicker wall thickness (typically 3mm in the industry) to ensure structural strength, further increasing the difficulty of modular stacking and hindering the proper insertion and assembly of accessories, thus impacting the efficiency and accuracy of MIDI keyboard assembly.

[0094] To solve the above problems, new types of supporting components are usually used to meet the requirements of integrated module stacking of circuit board 103 and various components, but this method is costly.

[0095] To address this, the electronic musical instrument keyboard provided by this utility model makes compatibility adjustments to the front panel structure to meet the requirements of integrated module stacking of circuit board 103 and various components. By recessing and reducing adhesive at the transmission interface (plug-in end) of circuit board 103 on the inner side of front panel 1 to form an interface clearance groove 15, and by recessing and reducing adhesive at the assembly points of data cables and accessories (such as switch accessories 19) on the outer side of front panel 1 to form data cable clearance grooves and switch clearance grooves 171, the diameters of knob through holes 142 and key through holes 143 are enlarged to increase the assembly mobility of corresponding function knobs and function keys. This achieves the requirement of integrated module stacking of circuit board 103 and various components and proper insertion and assembly of accessories, thereby improving the assembly efficiency and accuracy of the MIDI keyboard.

[0096] Please refer to the following: Figure 1-2 11-13 In this embodiment, the faceplate 1 also includes a hollowed-out key area 18 located at the other end of the faceplate 1 for mounting the key assembly 104.

[0097] In other embodiments, the electronic musical instrument keyboard may also be other types of musical instrument keyboards, such as an electronic piano keyboard, etc.

[0098] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Those skilled in the art should understand that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An electronic musical instrument keyboard, comprising a front shell (1) and a bottom shell (2) joined together to form a housing, characterized in that, The electronic musical instrument keyboard also includes: At least one roller support structure (3) is provided inside the bottom shell (2); At least one functional potentiometer (4) is rotatably mounted on the roller support structure (3); The functional roller (5) has a semi-circular cross-section. The bottom surface (51) of the functional roller (5) is recessed inside the bottom shell (2), and the top of the functional roller (5) extends upward out of the top shell (1). The center of the functional roller (5) is mounted on the functional potentiometer (4). The roller reset component (6) is connected between the roller support structure (3) and the functional roller (5); A reset buffer (7) is provided at the connection between the roller reset component (6) and the roller support structure (3).

2. The electronic musical instrument keyboard as described in claim 1, characterized in that, One end of the functional potentiometer (4) is provided with a mounting shaft (43), and the center of the functional roller (5) is fitted onto the mounting shaft (43); The roller reset component (6) is a reset spring. The reset spring is sleeved on the mounting shaft (43) and abuts against the functional roller (5). A pair of reset buffer components (7) are spaced apart on the roller support structure (3) and matched with the two leads (61) of the reset spring. The two leads (61) of the reset spring are respectively connected to a pair of reset buffer components (7).

3. The electronic musical instrument keyboard as described in claim 2, characterized in that, Also includes: A pair of limiting buffers (8) are spaced apart on the roller support structure (3) and are respectively used to cooperate with the two ends of the bottom straight surface (51) to limit the forward and reverse rotation angles of the functional roller (5) and to provide buffer for the roller reset member (6) when contacting the functional roller (5).

4. The electronic musical instrument keyboard as described in claim 3, characterized in that, The roller support structure (3) includes: A supporting vertical plate (31) is provided at the middle of the bottom end of the supporting vertical plate (31) with a first base (32) extending vertically out of the supporting vertical plate (31). A pair of second bases (33) extending vertically out of the supporting vertical plate (31) in the same direction as the first base (32) are provided at the bottom end of the supporting vertical plate (31) on both sides of the first base (32). The supporting vertical plate (31) is installed on the inner side of the bottom shell (2) through the first base (32) and the pair of second bases (33). The limiting buffer (8) is located at the top of the second base (33), and a pair of reset buffers (7) are located on opposite sides of the first base (32) facing the pair of second bases (33).

5. The electronic musical instrument keyboard as described in claim 4, characterized in that, The functional potentiometer (4) is provided with a limiting protrusion at intervals on the same end of the mounting shaft (43); A pair of screw mounting seats (34) are provided on one side of the support vertical plate (31) at intervals, which extend perpendicularly to the first base (32) from the support vertical plate (31). The screw mounting seats (34) are provided with screw connection holes (341). The middle part of the support vertical plate (31) is provided with shaft holes (35) that match the mounting shaft (43) and potentiometer limiting holes (36) that match the limiting protrusion. The bottom surface of the face shell (1) is provided with a roller limiting post (11) that matches the screw mounting base (34). The roller limiting post (11) is provided with a screw limiting hole (111) that matches the screw connection hole (341) and a roller clearance hole (12) that matches the shape of the functional roller (5). The bottom surface of the face shell (1) is provided with a plurality of roller limiting ribs (13) spaced around the roller clearance hole (12). The support plate (31) is fastened to the face shell (1) by connecting screws passing through the corresponding screw connection holes (341) and the screw limiting holes (111). The functional potentiometer (4) is rotatably mounted on the support plate (31) by passing through the shaft hole (35) through the mounting base. The top of the functional roller (5) passes through the inner side of each roller limiting rib (13) and the roller clearance hole (12) and extends out of the face shell (1).

6. The electronic musical instrument keyboard as described in claim 3, characterized in that, The contact surface between the lead-out end (61) and the reset buffer (7) is coated with grease.

7. The electronic musical instrument keyboard as described in any one of claims 3-6, characterized in that, The limiting buffer (8) and the reset buffer (7) are made of EVA cushioning foam or silicone material.

8. The electronic musical instrument keyboard as described in any one of claims 1-6, characterized in that, Two roller support structures (3) are provided, and the two roller support structures (3) are spaced apart inside the bottom shell (2); Two functional potentiometers (4) are provided, namely a pitch bend potentiometer (41) and a modulation potentiometer (42). The pitch bend potentiometer (41) and the modulation potentiometer (42) are rotatably mounted on a pair of roller support structures (3). The functional roller (5) has two parts, namely a pitch bend roller (53) and a modulation roller (54), and the corresponding centers of the pitch bend roller (53) and the modulation roller (54) are respectively mounted on the pitch bend potentiometer (41) and the modulation potentiometer (42).

9. The electronic musical instrument keyboard as described in any one of claims 1-6, characterized in that, The faceplate (1) includes a functional area (14) located at one end of the faceplate (1) for mounting the function knobs and function keys of the electronic musical instrument keyboard. The functional area (14) forms an inlay groove (141) recessed from the top surface of the faceplate (1). The bottom surface of the inlay groove (141) is provided with a plurality of knob through holes (142) and key through holes (143) penetrating the faceplate (1). Electronic musical instrument keyboards also include: The face cover (9) is shaped to match the inlay groove (141). At least four positioning posts (91) and at least four positioning buckles (92) are evenly distributed on the bottom surface of the face cover (9). The face cover (9) is provided with a knob clearance hole (93) and a button clearance hole (94) that match the knob through hole (142) and the button through hole (143) respectively. The bottom surface of the inlay groove (141) is provided with a column limiting hole (144) and a limiting groove (145) that match the positioning post (91) and the positioning buckle (92) respectively. The cover (9) is fitted into the inlay groove (141) by means of positioning pin (91) and positioning buckle (92), respectively, in cooperation with the column limiting hole (144) and the limiting slot (145).

10. The electronic musical instrument keyboard as described in claim 9, characterized in that, The diameters of the knob through hole (142) and the key through hole (143) are larger than the knob clearance hole (93) and the key clearance hole (94), respectively. The inner sidewall of the face shell (1) is provided with an interface clearance groove (15) at the transmission interface of the circuit board (103) of the electronic musical instrument keyboard. The outer sidewall of the face shell (1) is provided with a data line clearance groove surrounding the data line clearance hole at the data line clearance hole of the data interface of the circuit board (103). The face shell (1) is also provided with a switch mounting hole (17). The outer sidewall of the face shell (1) is provided with a switch clearance groove (171) surrounding the switch mounting hole (17).

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