A control box device installed on the upper door of a piano

Abstract

The present application relates to the technical field of musical instruments, and particularly relates to an electronic device for a piano, in particular to a control box casing device installed on a door plate of a piano, comprising a bottom shell, a cover, a circuit board, a button, a main panel, an electromagnet, a magnetic attraction rebounder and a frame of a border strip, the bottom shell and the cover constitute a control box casing, electronic components are arranged in the control box casing, the bottom shell is mainly composed of two surfaces which are at right angles, one surface is the main panel provided with transparent material, and the other surface is a bottom plate provided with the electromagnet, and the electromagnet lock tongue arranged on the bottom plate near the side surface is outward, and the control box casing device has the advantages of novel design, compact structure, strong practicability and suitability for most upright pianos.

Description

Technical Field

[0001] This invention relates to the field of musical instruments, specifically to electronic devices for pianos, and particularly to a control box housing device installed on the upper panel of a piano. Background Technology

[0002] With the development of technology, traditional pianos are being combined with modern electronic technology, and multifunctional, digital, and intelligent products are becoming the trend. The inventor of this invention disclosed a functional panel device that can be hidden inside the piano shell in ZL2019213613219. It is suitable for integrating electronic circuits of peripheral electronic products of the piano, such as automatic playing and mute functions. However, this invention has a shortcoming: when the functional panel hidden inside the piano shell is unscrewed from the piano shell, the top cover of the piano must be opened. If there are items placed on the top cover of the piano, the items must be removed, making it inconvenient to use the functional panel. Summary of the Invention

[0003] The purpose of this invention is to provide a control box device that can be installed on a piano. In particular, it can be unscrewed from the piano shell when in use without opening the top cover of the piano, and it can also be hidden inside the piano shell without opening the top cover of the piano when not in use. It has a simple appearance, is feasible in manufacturing process, and is easy to install.

[0004] To achieve the above objectives, a control box device for installation on a piano is designed, including a bottom shell, a cover, a circuit board, buttons, a main panel, an electromagnet, a magnetic rebound device, and a frame strip. The bottom shell and the cover constitute the control box housing, which contains electronic components. The bottom shell, as the bottom of the control box housing, is mainly composed of two sides that intersect at right angles. One side is a main panel with transparent material, and the other side is a base plate with an electromagnet. The electromagnet latch located near the side of the base plate faces outward.

[0005] The present invention also has the following preferred technical solutions:

[0006] 1. The control box housing is fan-shaped, and a cylindrical pivot is provided at the included angle of the straight edge on the side of the housing, so that the cover can rotate around the pivot.

[0007] 2. The cylindrical pivot is inserted into the inner pivot hole seat opposite the frame of the concave notch in the middle of the upper door panel. The pivot supports the control box housing composed of the bottom shell and the cover, and rotates 90° within the notch surrounded by the frame of the frame.

[0008] 3. The frame of the border strip is a concave frame consisting of three symmetrical sections. Each section has an L-shaped cross-section, covering the outer edge of the concave notch of the upper door panel. The lower part of the inner side of the left and right sections facing each other is provided with a pivot hole seat. The pivot hole seat with a slot is inserted into the pivot hole seat seat and fastened to the small fold surface of the border strip frame with screws.

[0009] 4. A magnetic rebound device is installed below the concave notch on the back of the upper door panel. When the control box housing tilts and rotates backward from the outside of the upper door panel, the magnet of the magnetic rebound device attracts the electromagnet housing on the bottom shell of the control box.

[0010] 5. On the inner side of the horizontal middle section of the concave frame, there is a rubber strip with an L-shaped cross section. One side is glued along the inner edge, and the other side is attached to the outward-turned bottom plate of the control box.

[0011] 6. A camera is installed inside the control box housing. The camera head is placed in the inner hole of the rubber pad. The bottom plate of the control box housing is equipped with an embedded nut. The matching hand screws are screwed into the embedded nut. The hand screw with a rubber and plastic sleeve at the tail end abuts against the tail end of the camera.

[0012] 7. The camera inside the control box housing captures images through the main panel, which has a transparent material on the housing.

[0013] 8. The control box housing contains LED beads, which illuminate the main panel with transparent material inside the housing.

[0014] Compared with the prior art, the advantages of this invention are: novel design, compact structure, strong practicality, and applicability to most upright pianos. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a piano facing forward when the control box of the device of the present invention is attached to the magnetic rebounder.

[0016] Figure 2 This is a side view of a piano when the control box of the device of the present invention is attached to the magnetic rebounder.

[0017] Figure 3 for Figure 2 Enlarged schematic diagram of a partial cross-section;

[0018] Figure 4 This is a side view of the piano after the upper piano panel of the control box of the device of the present invention has been rotated out.

[0019] Figure 5 for Figure 4 Enlarged schematic diagram of a partial cross-section;

[0020] Figure 6 This is a frontal view of the piano after the upper piano panel of the control box of the device of the present invention has been rotated out.

[0021] Figure 7 This is a partial top view of the control box function panel of the device of the present invention after the upper door panel of the piano has been rotated out.

[0022] Figure 8 This is a cross-sectional side view of the speaker section of the control box of the device of the present invention;

[0023] Figure 9 This is a cross-sectional side view of the camera module portion of the control box of the device of the present invention;

[0024] Figure 10 This is a side view of the cross-sectional profile of the housing of the control box functional panel of the device of the present invention.

[0025] Figure 11 This is a partial cross-sectional side view of a piano before the control box of the device of the present invention is installed;

[0026] Figure 12 for Figure 11 Enlarged schematic diagram of a partial cross-section;

[0027] Figure 13 This is a side view of the central cross-section of the frame of the device of the present invention;

[0028] Figure 14 This is a schematic diagram of the plastic shaft hole seat part of the device of the present invention;

[0029] In the diagram: 1. Top panel, 2. Top cover, 3. Frame strip, 4. Main panel, 5. Bottom shell, 6. Cover, 7. Cylindrical pivot, 8. Button, 9. Magnetic rebound mechanism, 10. Magnet, 11. Electromagnet, 12. Electromagnetic latch, 13. Bass reflex tube, 14. Left socket, 15. Left speaker, 16. Monitor, 17. Right speaker, 18. Right socket, 19. Baffle, 20. Angled surface, 21. Fastening screw, 22. Small folded surface, 23. Pivot hole seat, 24. Speaker, 25. Self-tapping screw, 26. Sealing strip, 2 7. Rubber pad, 28. Camera, 29. Rubber sleeve, 30. Embedded nut, 31. Hand screw, 32. Function panel, 33. Circuit board, 34. Interface panel, 35. Interface circuit board, 36. LED bead, 37. Pressure plate, 38. Wire, 39. Countersunk self-tapping screw, 40. Locking tongue hole, 41. Rubber and plastic strip, 42. Slide base, 43. Compression spring, 44. Ratchet, 45. Magnet, 46. Screw hole, 47. Spindle hole seat, 48. Slot, 49. Fastening screw hole, 50. Spindle hole. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings. The structure and principle of the present invention are very clear to those skilled in the art. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0031] exist Figure 1 , Figure 2 and Figure 3The diagram shows that the upper edge of the upper panel (1) below the piano top cover (2) has a concave notch, and the outer edge of the notch has a concave frame formed by three symmetrical sections, each section being basically L-shaped. The control box housing is composed of a bottom shell (5) and a cover (6), with built-in electronic circuits. The cover (6) has buttons (8) and other components on its surface. The bottom shell (5) is composed of two planes with an angle of about 90°. The outer plane is the main panel (4) with transparent material, and the other bottom plane has an electromagnet (11). The main panel (4) closes the concave notch formed by the frame (3). In practice, the length and width of the main panel (4) are slightly smaller than the concave notch formed by the frame (3) by 1-2 mm, leaving a small gap. The bottom shell (5) and the cover (6) can be injection molded from engineering plastics. The main panel (4) can be glued to the bottom shell (5) with transparent organic glass or other adhesives. The electromagnet (11) on the bottom plane of the bottom shell (5) is fastened with screws. The back of the iron shell is exposed outside the control box housing and must not be covered by the plastic shell. The press-type magnetic rebound device (9) is located on the right-angled side of the concave notch on the back of the upper door panel (1). The magnetized magnet (10) is facing upward to attract the electromagnet (11) iron shell containing the trapezoidal lock tongue (12).

[0032] Figure 2 , Figure 3 , Figure 4 and Figure 5 The bottom shell (5) and cover (6) form a control box housing that is approximately fan-shaped. A cylindrical pivot (7) about 4 mm long is provided at the angle between the two straight sides of the irregular fan-shaped side of the housing, so that the control box housing can rotate about 90° inside and outside the upper door panel (1). The left and right sides of the housing are provided with a bass reflex tube (13) for bass reflex amplification of the speaker. When the magnetic rebound device (9) and the magnet (10) attract the electromagnet (11) iron shell, the main panel (4) is basically flush with the upper door panel (1). Pressing the main panel (4) of the control box with a finger triggers the magnetic rebound device (9) and the magnet (10) to bounce up, pushing the control box housing to flip from inside the upper door panel (1) to the outside. The main panel (4) becomes perpendicular to the upper door panel (1), and the cover (6) of the control box housing, which was originally hidden behind the upper door panel (1), is also revealed.

[0033] Figure 6 The diagram illustrates the operation panel on the cover (6) that flips out from the top panel (1). Various audio and digital transmission interfaces and function buttons can be installed. The left socket (14) and right socket (18) in the diagram can be used as headphone jacks for two people. In practice, the cover (6) can also be equipped with a microphone, speaker, and display. The diagram shows the left speaker (15), right speaker (17), display (16), and button (8). Alternatively, the left socket (14) and right socket (18) can be located on the left and right sides of the control box housing, respectively.

[0034] Figure 7The diagram illustrates that the cylindrical pivots (7) on the left and right sides of the control box housing, which is composed of a bottom shell (5) and a cover (6), are inserted into pivot holes (23) on the frame (3) so that the control box housing can rotate. Figure 7 It is also shown that the trapezoidal latch (12) of the electromagnet (11) on the bottom shell (5) of the control box is inserted into the latch hole of the frame (3) with an extended inclined surface (20). When the function panel is operated, the latch (12) prevents the control box shell from tilting inward under force. Only when the unlock button on the function panel is pressed, the latch (12) retracts after the electromagnet (11) is energized, and the control box shell tilts inward. The extended inclined surface (20) on the inner side of the frame (3) helps to cooperate with the trapezoidal latch (12) of the electromagnet (11). When the control box shell is rotated outward, the latch (12) slides smoothly into the latch hole of the frame (3). Figure 7 A protruding baffle (19) is provided on the iron shell of the electromagnet (11) to control the limit when the box shell rotates outward. In practice, the inclined surface (20) and the frame strip (3) can be stamped together as a whole, and the baffle (19) and the iron shell of the electromagnet (11) can be stamped together as a whole.

[0035] Figure 8 In the speaker structure diagram, the elliptical speaker (24) is located inside the cover (6). Considering the injection molding demolding and speaker enclosure airtightness, a plastic basket speaker (24) can be glued to the back of the speaker grille. The cover (6) and the bottom shell (5) are connected by self-tapping screws (25). Sealing strips (26) and related structures are provided at the joints of the speaker parts and the joints of the relevant partitions. In practice, the left and right speakers can be located on both sides of the control box housing, and bass reflex tubes (13) are provided on both sides of the control box housing to improve the sound effect. Figure 8 The process involves setting a notch on the side of the cover (6) so that after the control box housing is rotated and flipped out of the upper door panel (1), the opening of the bass reflex tube (13) is outside the upper door panel (1), which is conducive to the superposition of bass sound pressure. The independent bass reflex tube (13) is fitted into the notch on the side of the cover (6) and glued to the inside. At the same time, the bass reflex tube (13) is glued to the inner shell structure of the speaker to strengthen its firmness.

[0036] Figure 9The diagram illustrates the structure of a camera (28) housed within the control box housing. The front of the camera (28) is positioned within the inner hole of a soft rubber pad (27) and connected to it with screws. The rubber pad (27) is glued to the inside of the bottom shell (5). In practice, two partition plates can be provided on the inner side of the bottom plate of the bottom shell (5), which are integrally injection molded with the bottom shell (5) to surround and fix the rubber pad (27). During the injection molding of the bottom shell (5), a nut (30) is embedded in the bottom plate, so that the hand-tightening screw (31) with a rubber sleeve (29) on its head abuts against the rear of the camera (28). Adjusting the hand-tightening screw (31) can finely adjust the tilt angle of the camera (28) looking down at the keyboard. The rubber pad (27) and the rubber sleeve (29) can effectively reduce the impact of vibrations from the speaker and other sources on the camera effect. Figure 9 In the middle, the camera (28) lens part of the bottom shell (5) is provided with a window hole, so that light can pass through the window hole and the transparent main panel (4) and be focused into the image in the camera (28).

[0037] When the control box housing tilts inward and the main panel (4) closes the concave notch formed by the frame (3), the camera (28) can also be used for environmental monitoring. If necessary, a camera to capture the performer's face can also be installed on the cover (6). When the control box housing is flipped outward, the dual-camera function allows the performer's facial expressions and hand gestures to be fully recorded.

[0038] Figure 10 The electrical installation structure inside the control box housing is illustrated. Self-tapping screws (25) are screwed into the bottom plate of the bottom shell (5) where the electromagnet is located, connecting the cover (6) to form the control box housing. The cover (6) has a function panel (32) on its surface, instead of being a single piece, to facilitate demolding during plastic injection molding. The function panel (32) has a snap-on hook on the back of the cover (6). Buttons (8) or other components such as displays are provided on the function panel (32). The circuit board (33) is fixed to the hole post on the back of the function panel (32) with screws. In practice, an interface panel (34) can also be provided on the surface of the cover (6) to integrate various audio, video, analog and digital sockets, and even card readers, etc., into the interface circuit board (35) provided on the interface panel (34). To facilitate demolding during plastic injection molding, the interface panel (34) also has a snap-on hook on the back of the cover (6) to connect to it, instead of being a single piece. Figure 10 In the middle, the back of the main panel (4) has built-in light-emitting beads (36), and the corresponding part of the bottom shell (5) has a window hole, so that the light emitted by the light-emitting beads (36) can pass through the window hole and the transparent main panel (4) to illuminate outward; the bottom plate of the bottom shell (5) has a wire-passing window hole, which is used to control the electrical wires (38) in the box to connect to other electrical circuits in the piano shell. In order to prevent the wires (38) from being pulled, a pressure plate (37) can be installed on the bottom plate of the bottom shell (5) to ensure the reliability of the electrical connection.

[0039] Figure 1 , Figure 7 , Figure 11 , Figure 12 and Figure 13 The shape of the frame (3) and its installation structure are illustrated. The frame (3) is a concave frame formed by three symmetrical sections. The cross-sections of the left, middle and right sections are basically L-shaped. In practice, it can be made of a thin stainless steel sheet with a thickness of about 1 mm and strong decorative properties. Double-sided adhesive can be applied to the back and pasted to the outer edge of the concave notch on the upper door panel (1). Countersunk self-tapping screws (39) are passed through the screw holes (46). , fixed on the concave notch of the upper door panel (1); the inner side of the left and right opposing frame strips (3) is provided with a lock tongue hole (40) and an extended inclined surface (20) to facilitate the trapezoidal lock tongue (12) of the electromagnet (11) to compress the internal spring and smoothly insert into the lock tongue hole (40) of the frame strips (3); the lower part of the inner side of the left and right opposing frame strips (3) is provided with a strip notch, namely the pivot hole seat slot (47), and the notch opening is provided with a small folded surface (22) perpendicular to the inner side of the frame strips (3), which is provided with a threaded hole, and the small folded surface (22) is integrally stamped with the frame strips (3).

[0040] Figure 14 The schematic pivot hole seat (23) is right-angled, with a pivot hole (50) on one side and a fastening screw hole (49) on the other side. A slot (48) is provided on the side containing the pivot hole (50). When installing the control box, the pivot holes (50) of the two pivot hole seats (23) are respectively inserted into the cylindrical pivots (7) on both sides of the control box housing. Then, the pivot hole seats (23) are inserted into the pivot hole seat slots (47) along the slots (48). Finally, the fastening screws (21) are passed through the fastening screw holes (49) of the pivot hole seats (23) and screwed into the threaded holes on the small folded surface (22) to firmly connect the pivot hole seats (23) with the frame strip (3). The connection between the control box and the frame strip (3) is then completed. Conversely, when removing the control box from the frame (3), simply unscrew the fastening screw hole (49) from the threaded hole on the small fold (22) and pull out the shaft hole seat (23) at the shaft hole seat latch (47).

[0041] Figure 11 and Figure 12 The illustrated rubber strip (41) is a straight strip with an L-shaped cross-section, located on the middle section surface of the concave frame (3). One side is glued along the inner edge, and the other side is attached to the bottom plate of the outward-folding control box bottom shell (5). Alternatively, a short post can be integrally attached to the glued surface and inserted into the relevant through holes in the middle section of the frame (3) for mutual fixation. When the control box is folded inward, the magnetic rebound device (9) and the magnet (10) attract the electromagnet (11) iron shell, and the two sides of the rubber strip (41) are squeezed and glued together in a straight line, such as... Figure 2As shown. The rubber strip (41) can prevent dust and reduce noise, and can also prevent the unnecessary increase of piano sound caused by gaps. Due to the push of the plastic elasticity, it can also reduce the discomfort of falling when the control box suddenly tilts backward and flips inward when the electromagnet (11) is unlocked.

[0042] Figure 11 and Figure 12 This is a schematic diagram of the frame (3) of the inclined upper door panel (1). The diagram also illustrates the internal structure of the magnetic rebounder (9). The housing contains a magnet (45) and a magnetic magnet (10), which are combined inside a plastic block. The plastic block contains a rotatable seat hole for the ratchet (45). When an external force presses the magnetic magnet (10) at the front of the magnetic rebounder (9), it pushes the plastic block and compresses the compression spring (43). The plastic block drives the ratchet (44) to retreat in the slide base (42) until the ratchet (44) slides into the bottom of the slide. It then engages the bottom corner of the slide along the slide wall and turns. The teeth stop retreating when they hit the notch. When the external force presses again, the ratchet (44) that is stuck in the bottom notch of the slide is forced to engage the other corner of the slide and turns again. Under the elastic force of the compression spring (43), it moves forward along the slide. The ratchet (44) pushes the magnet (45) and the magnetic magnet (10) inside the plastic block to pop out. Of course, an electromagnet or a push-type cabinet door clip commonly known as a beetle can be used instead of a magnetic rebound device to achieve the function of pushing and lifting the control box. Considering all factors, the magnetic rebound device is more convenient, durable and reliable.

[0043] In summary, the device of the present invention is novel and practical in achieving multi-functional integration, with a simple appearance, convenient use, and easy manufacturing process. The present invention has a wide range of applications, including home piano playing, piano classroom teaching, and remote network communication for pianos.

Claims

1. A control box device installed on the upper door of a piano, comprising a bottom shell, a cover, a circuit board, a button, a main panel, an electromagnet, a magnetic suction rebounder and a frame of a frame strip, characterized in that: The bottom shell and the cover form a control box shell, and the control box shell is internally provided with electronic components, the bottom shell serving as the bottom of the control box shell is mainly composed of two surfaces intersecting at right angles, one surface is a main panel provided with transparent material, and the other surface is a bottom plate provided with electromagnets, the electromagnet lock tongue provided on the bottom plate near the side surface portion is outward, and a magnetic attraction rebounder is provided below the concave gap on the back of the upper door plate, when the control box shell is rotated backward from outside to inside of the upper door plate, the magnetic iron of the magnetic attraction rebounder is attracted to the electromagnet shell provided on the control box bottom shell, when the magnetic iron of the magnetic attraction rebounder is attracted to the electromagnet shell, the magnetic iron of the magnetic attraction rebounder is popped up by pressing the main panel with fingers, the control box shell is flipped by the upper door plate, and the main panel becomes perpendicular to the upper door plate, the magnetic attraction rebounder is provided with a magnetite and a magnetic iron, the magnetite and the magnetic iron are combined in a plastic block, the plastic block is provided with a ratchet seat hole, when an external force presses the magnetic iron at the front part of the magnetic attraction rebounder, the plastic block is pushed and the compression spring is compressed, the plastic block drives the ratchet to retreat in the sliding groove base until the ratchet slides into the bottom of the sliding groove, the ratchet is turned along the inclined meshing groove bottom corner, the gear teeth stop retreating by being stopped in the gap, when the external force is pressed again, the ratchet in the gap of the bottom of the sliding groove is turned again by the meshing groove bottom corner, the ratchet moves forward along the sliding groove by the spring force, and the ratchet drives the magnetite and the magnetic iron in the plastic block to pop out, the control box shell is a fan-shaped body, a cylindrical rotating shaft is provided at the straight edge corner of the shell side surface, so that the cover can rotate around the rotating shaft, the cylindrical rotating shaft is inserted into the opposite inner rotating shaft hole seat of the frame strip frame provided along the edge of the middle concave gap of the upper door plate, the rotating shaft supports the control box shell composed of the bottom shell and the cover, and the control box shell rotates at an angle of 90° in the gap surrounded by the frame strip frame.

2. The control box device mounted on the piano upper door according to claim 1, characterized in that: the frame strip frame is a concave frame surrounded by three symmetrical sections, each section is L-shaped, covers the outside edge of the concave gap of the upper door plate, the inner side surfaces of the left and right sections are oppositely provided with rotating shaft hole seat bayonets, the rotating shaft hole seat provided with a clamping groove is inserted into the rotating shaft hole seat bayonet, and is fastened to the small folding surface of the frame strip frame by a screw.

3. The control box device mounted on the piano upper door according to claim 1, characterized in that: the surface of the transverse middle section of the concave frame strip frame is provided with an L-shaped rubber strip in the transverse direction, one side is glued along the inner edge, and the other side is attached to the outwardly turned bottom plate of the control box bottom shell.

4. The control box device mounted on the piano upper door according to claim 1, characterized in that: the control box shell is internally provided with a camera, the head of the camera is arranged in the inner hole of the rubber pad, the bottom plate of the control box bottom shell is provided with an inlay nut, a hand screw with an rubber sleeve is inserted into the inlay nut, and the tail of the hand screw abuts against the tail of the camera.

5. A control box device for mounting on a piano fall according to claim 4, wherein: the camera in the control box shell takes pictures through the main panel provided with transparent material of the shell.

6. The control box device mounted on the piano upper door according to claim 1, characterized in that: the control box shell is internally provided with a light-emitting lamp bead, and the light-emitting lamp bead illuminates through the main panel provided with transparent material of the shell.

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