CN114822459B - Modularized electric piano keyboard based on core-shell separation and whole-course rolling and sliding linkage of keys - Google Patents
Modularized electric piano keyboard based on core-shell separation and whole-course rolling and sliding linkage of keys Download PDFInfo
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- CN114822459B CN114822459B CN202210453685.XA CN202210453685A CN114822459B CN 114822459 B CN114822459 B CN 114822459B CN 202210453685 A CN202210453685 A CN 202210453685A CN 114822459 B CN114822459 B CN 114822459B
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- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
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Abstract
A modular electric piano keyboard based on core-shell separation and whole-course rolling and sliding linkage of keys comprises a machine core and a plurality of keyboard shells. The machine core is a keyboard framework in the whole device, and the keyboard shell is buckled at a corresponding position of the machine core, so that a complete electric piano keyboard can be formed. The movement comprises a keyboard bracket and a plurality of keyboard units. The keyboard unit mainly comprises a keyboard unit support, a key rod, a lower gear rod and a connecting sliding rod, and the hand feeling of the keys is improved and the service life is prolonged by utilizing the linkage of a gear device and the sliding device. The keyboard core and the shell are completely independently designed, so that the keyboard core and the shell can be flexibly configured into keyboards with different key numbers, are convenient to assemble and can be applied to different scenes according to requirements.
Description
Technical Field
The invention mainly relates to a keyboard playing musical instrument, an electronic technology and a mechanical technology, in particular to a modular electric piano keyboard based on core-shell separation and whole-course rolling and sliding linkage of keys.
Background
A mechanical piano is a keyboard musical instrument, and when a user presses keys during playing, sounds are generated through mechanical devices in the musical instrument. The keys of mechanical piano have natural touch feeling because of more than 20 transmission devices, including a linkage, a rotary beater, a spoon nail, a contraction strip and the like. After the keys are pressed down, the hammer is finally jacked up by a stick through a series of levers, and the stick finally deviates from a soft pad below the hammer due to the traction of the levers, so that the hammer is completely separated from the control of the keys, the action of string striking is completed by inertia, and the sound is produced. At the moment that the stick is separated from the soft pad, the hammer can give a larger reaction to the keys, so that the resistance is suddenly increased in the process of pressing the keys, and the feeling of playing in the air is avoided.
Because of low price, manufacturers do not intentionally pursue key hand feeling, and generally adopt keys directly connected with a lever with a counterweight. Or further, a hook is added on the balance weight to hook a soft rubber to achieve the effect of sudden resistance increase. The lever structure is similar to a seesaw, and two ends of the lever are suspended without contacting other devices in a certain time period in the key pressing process. Therefore, in the whole key pressing process, the touch is non-contact, the middle is suspended, and the touch is non-contact until the lever at the end of the key presses the buffer device below, the touch speed is gradually increased to the hard brake in the whole process, so that the force is uneven; in addition, when the keys are pressed at different positions, the moments are different, and the difference is large. In order to accelerate the rebound, the traditional method of the electric piano adopts a spring and other devices, the spring rebounds by means of the deformation force of the spring, and when the spring does not work, the method is invalid.
In addition, the existing electric piano is integrated with a core shell, and different core shells are needed for producing keyboards with different key numbers, so that the expansion is not facilitated. The invention designs a modular electric piano with a separated core shell, which is convenient to disassemble and assemble. Utilize gear and slider linkage to promote the button and feel, have gear and slider cooperation contact at the whole journey of button in-process, the sense of touch is played to the imitation piano, does not press the unsettled sense of lever key, and the sense of touch is even. The sliding device provides a variable moment, so that the force feeling at different keys is equivalent.
Disclosure of Invention
Aiming at the problems of poor hand feeling, short service life, inconvenient assembly and the like of the existing low-end electric piano keyboard, the invention utilizes the linkage of the gear device and the sliding device to improve the hand feeling of the keys and prolong the service life, and the inner core and the outer shell are completely independently designed so as to be flexibly configured into keyboards with different numbers of keys and be applied to different scenes as required. The invention is realized by the following technical scheme:
a modular electric piano keyboard based on core-shell separation and whole-course rolling-sliding linkage of keys is characterized by comprising a machine core and a plurality of keyboard shells. The machine core is a keyboard framework in the whole device, and the keyboard shell is buckled at the corresponding position of the machine core, so that a complete electric piano keyboard can be formed. The movement and the keyboard shell are separated, so that the modular design is facilitated; in the key pressing process, the key is pressed, and the gear device and the sliding device are linked to improve the key hand feeling and prolong the service life. The movement comprises a keyboard support and a plurality of keyboard units. The keyboard support mainly comprises three fixed shafts and a support plate, wherein the three fixed shafts comprise 2 upper fixed shafts and 1 lower fixed shaft. The upper fixing shafts comprise 1 upper front fixing shaft and 1 upper rear fixing shaft. The fixed shaft is a long-strip cylindrical hollow aluminum bar, two ends of the fixed shaft are fixed on two sides of the whole keyboard, and the fixed shaft is mainly used for fixing and supporting the support plate. The support plate is used for placing the keyboard unit, and the keyboard support is used for placing and fixing the keyboard unit.
The keyboard unit mainly comprises a keyboard unit bracket, a key rod, a lower gear rod and a connecting sliding rod, and is made of ABS.
The keyboard unit support is double-L-shaped, a round hole is formed below the long L end and used for the upper rear fixing shaft to penetrate through, and a rotating shaft round hole is formed in the upper surface of the long L end and connected with the key rod through a rotating shaft. A circuit board and two conductive rubber keys are arranged on a cross bar in the middle of a keyboard unit support, and the circuit board and the conductive rubber keys jointly realize the detection of the existence of keys and the force and duration of the keys. The short L end of the keyboard unit bracket is provided with a rotating shaft round hole which is connected with the lower gear rod through a rotating shaft. The keyboard unit is fixed on the bracket plate through the keyboard unit bracket.
The keyboard unit support is characterized in that the keyboard unit support is provided with a long L-shaped end, a key rod and a rotating shaft, wherein the key rod is a stress body of a key and mainly has a cross rod structure, and the rotating shaft is placed at the tail end of the key rod through a circular hole and is connected with the long L-shaped end of the keyboard unit support; the key bar is provided with a raised contact point, an upper rack and a rotating shaft round hole below. The convex contact point is contacted with the conductive rubber key when the key is pressed, and the key action is shown; the gears on the upper rack and the lower gear rod are meshed with each other in a certain tightness. The round hole of the rotating shaft below the key rod is used for connecting the key rod with the connecting sliding rod. The upper surface of the key rod cross bar has two types, one type has bulges, is in the shape of a black key and is used by the black key; one is without protrusions and is used for white keys.
The lower gear rod is provided with a lower gear and a sliding rail, the lower gear is Z-shaped, one end of the lower gear is provided with the lower gear which is meshed with the upper rack in a staggered manner, and the other end of the lower gear is provided with the sliding rail; the lower surface of the other end is provided with a groove for placing a balancing weight. The lower gear end has a rotating shaft circular hole, and the short L-shaped end of the keyboard unit bracket is sleeved on the rotating shaft through the hole so as to be connected together.
Wherein connect the slide bar and connect key pole and lower gear pole, one end passes through the rotation axis round hole and connects the key pole bottom, and one end is the U type, and the rotation axis is placed to middle trompil, and the rotation axis passes the slide rail of lower gear. When the key is pressed, the rotating shaft connected to the U-shaped end of the sliding rod slides to the other end from one end in the sliding rail, and when the key is released, the U-shaped end automatically slides reversely to return to the original position. A counterweight block box is arranged on the upper surface of the U-shaped end connected with the sliding rod, and counterweight blocks with different weights are placed in the counterweight block box; the cushion block is pasted at the position above the counterweight block box, the key rod is contacted with the impact of the sliding rod when the key is reduced, the impact force is buffered to ensure smooth motion transition, and no noise is generated during use.
The last rack of key pole is the interlock of certain elasticity with the gear on the gear pole down in the keyboard unit, and this gear device is at touch key process, including the button with lift up the in-process, whole interlock gives the key pole and presses certain resistance to it is lighter to solve current engineering plastics quality, and the keyboard plays the not good condition of sense of touch.
The rotation shaft on the U-shaped end of connecting the slide bar in the keyboard unit can slide to another end from one end in the slide rail of lower gear, and this gear device is in touch key process, including the button with lift up the in-process, whole journey contact, overcome and pressed the unsettled sense of lever key.
In order to match with the current black-white piano keyboard, the keyboard unit is divided into a black key and a white key, and the main difference is that the upper surfaces of the key rods are different, and the upper surfaces of the white key rods are not provided with bulges; in addition, because the key moments of the white key and the black key are different, the configured balancing weights are different, and other structures are the same.
The keyboard shell is made of smooth ABS materials and is placed on the key rods on the keyboard unit, and the number of the key rods corresponds to that of the keyboard unit. The keyboard shell is made into different shapes and configured with different colors according to the requirements so as to display individuation and adapt to a certain type of people;
if the keyboard is matched with the current black and white piano keyboard, the keyboard shell is divided into a black key and a white key, the black key shell is short, and the white key shell is long; the keyboard shell is directly buckled on the key rod. The black key casing is of only one type, while the white key casing is of many shapes, depending on the actual keyboard configuration. If the 88-key keyboard is manufactured, firstly, the 88-key keyboard unit and the corresponding keyboard shell are assembled according to the arrangement rule of black keys and white keys.
If a personalized keyboard is manufactured, the shape of the black key shell can be changed into a slope structure with slopes at two ends, and some colors are added for decorating so as to distinguish different pitch groups. When the object is a child, the key shell can be made into a color key shell, so that the interestingness is increased.
Aiming at the modularized structure of the invention, a grouping assembly method is adopted, N keyboard units are a group, a plurality of groups are firstly assembled, and then the groups are spliced into a complete keyboard, and the specific method is as follows:
1) Selecting each keyboard unit in a group according to the arrangement rule of black keys and white keys;
2) Assembling the key rod, the lower gear rod and the connecting sliding rod of each keyboard unit in a group to form a semi-whole: the upper rack of the key rod and the gear on the lower gear rod are engaged and assembled with a certain degree of tightness through the round hole of the rotating shaft below the key rod to connect the key rod and the sliding rod. Assembling N semi-integers;
3) The keyboard unit supports of N keyboard units in one group are buckled on the support plate and fixed;
4) The corresponding circuit board and the conductive rubber key of the group are placed on the middle cross bar of the keyboard unit bracket and fixed;
5) Placing the semi-whole body formed by the N key rods assembled in the step 2), the lower gear rods and the connecting sliding rods on a keyboard unit bracket, stringing the key rods and the lower gear rods together by using 2 rotating shafts, and fixing the key rods and the lower gear rods: one of the rotating shafts penetrates through a rotating shaft round hole on the long L end of the keyboard unit bracket, so that the keyboard unit bracket is connected with the key rod; the other rotating shaft penetrates through a rotating shaft round hole on the short L end of the keyboard unit bracket, so that the keyboard unit bracket is connected with the lower connecting gear rod;
6) The assembly of the machine core is completed by sequentially splicing each group completed in the steps 1) to 5), and the machine core is arranged on the machine body through three fixed shafts;
7) A corresponding keyboard housing is snapped onto each keyboard unit.
The whole rolling and sliding linkage process of the keys of a certain key of the invention is as follows:
1) A hand is played to press a certain key, and the hand is contacted with a key rod of the keyboard unit;
2) The contact point protruding below the key rod is contacted with the two conductive rubber keys, the key action and the key pressing time T1 are detected, and the key pressing force is detected through the conductive time difference of the two conductive rubber keys; the gears on the upper rack and the lower gear rod are meshed with each other in a certain tightness; the rotating shaft connected with the U-shaped end of the sliding rod slides from the initial end to the other end in the sliding rail of the lower gear rod;
3) The hand for pressing the key is lifted, and the rotating shaft connected with the U-shaped end of the sliding rod slides to the initial end from the other end in the sliding rail of the lower gear rod; the gears on the upper rack and the lower gear rod are still meshed with each other in a certain tightness;
and detecting the speed of key release and the release time T2 by the contact point protruding below the key rod and the time difference of two conductive rubber keys, so as to detect that the duration of the key is T2-T1. The invention provides a modular electric piano keyboard based on core-shell separation and whole-course rolling and sliding linkage of keys, which has the following advantages:
1) The core shell is separated, and the keyboard core and the keyboard shell are separate elements and are independent, so that the keyboard is convenient to manufacture and disassemble.
2) The invention utilizes the linkage of the gear device and the sliding device to improve the hand feeling of the key. In the key touch process, including the key pressing and lifting processes, the key rod is in matching contact with the gear device and the sliding device in the whole process, the piano playing touch feeling is simulated, and the hanging feeling of the lever-type keys is not pressed.
3) The invention utilizes the whole-course occlusion of the gear device in the key touching process to provide certain resistance for pressing the key rod, thereby solving the problems of lighter weight and poor keyboard playing touch feeling of the existing engineering plastics.
4) The invention utilizes the full-range contact sliding of the keys of the sliding device and the weight block below the sliding device to enable the keys to rebound and control the rebound speed, the weight of the weight block can be adjusted, and the traditional method relies on the deformation force of the spring, thereby prolonging the service life and conveniently adjusting the rebound parameters.
5) The keyboard unit is a small module which is independent, and is convenient to configure, disassemble and assemble as required. If an 88-key keyboard is required, 88-key keyboard units and corresponding keyboard shells are assembled according to the arrangement rule of black keys and white keys, and the keyboard is easily adjusted to a 76-key keyboard and the like.
6) The invention has simple structure, simple and quick assembly and disassembly and low assembly cost.
Drawings
FIG. 1 is a schematic structural view of an electric piano keyboard according to the embodiment;
fig. 2 is a schematic structural diagram of a keyboard deck of the present embodiment;
FIG. 3 is a schematic diagram of the general structure of the keyboard unit of the present embodiment;
FIG. 4 is a schematic structural view of a keyboard unit holder in the keyboard unit of this embodiment;
fig. 5 is a schematic view of the structure of a white key lever in the keyboard unit of the present embodiment;
FIG. 6 is a schematic view showing the structure of a black key lever in the keyboard unit of the present embodiment;
FIG. 7 is a schematic view showing the structure of a lower gear lever in the keyboard unit of the present embodiment;
FIG. 8 is a schematic view showing the structure of the keyboard unit according to the present embodiment, to which the slide bar is attached;
FIG. 9 is a schematic view showing a structure of a white keyboard unit of this embodiment with a white keyboard housing added thereto;
fig. 10 is a schematic structural view of the black key keyboard unit covered with the black key keyboard case of the present embodiment;
fig. 11 is a schematic view of the structure of the keyboard unit stand of this embodiment on which a circuit board is placed.
Detailed Description
The following description of the embodiments of the present invention is provided in connection with the accompanying drawings, but the invention is not limited thereto.
Fig. 1 is a schematic view showing the structure of the electric piano keyboard of the present embodiment. The device comprises a movement 1 and a plurality of keyboard shells 2. The machine core 1 is a keyboard framework in the whole device, and the keyboard shell 2 is buckled at the corresponding position of the machine core, so that a complete electric piano keyboard can be formed.
Fig. 2 is a schematic diagram of the keyboard movement of the present embodiment. The movement comprises a keyboard support 21 and a plurality of keyboard units 22. The keyboard support is mainly composed of three fixed shafts: 2 upper fixing shafts and 1 lower fixing shaft 213, and a bracket plate 214. The upper fixing shaft comprises 1 upper front fixing shaft 211 and 1 upper rear fixing shaft 212, the fixing shafts are long cylindrical hollow aluminum bars, two ends of each fixing shaft are fixed on two sides of the whole keyboard and are fixedly connected with the body, and the fixing shafts are mainly used for fixing and supporting the support plate. The support plate is used for placing the keyboard unit, and the keyboard support is used for placing and fixing the keyboard unit. The keyboard support has various implementation modes as bearing and supporting the keyboard unit, and the support of the embodiment can also be in other forms, which is not described in detail.
Fig. 3 is a schematic diagram of the general structure of the keyboard unit of the present embodiment. The keyboard unit is mainly composed of a keyboard unit bracket 31, a key lever 32, a lower gear lever 33 and a connecting slide lever 34, and is made of ABS.
Fig. 4 is a schematic view showing the structure of the keyboard unit holder in the keyboard unit of this embodiment. The keyboard unit bracket 31 is double-L-shaped, a round hole 311 is arranged below the long L end for the upper rear fixing shaft to pass through, and a rotating shaft round hole 312 is arranged above the long L end and connected with the key lever 32 through a rotating shaft. A circuit board support 313 is arranged on the middle cross bar of the keyboard unit support and used for placing a circuit board and a conductive rubber key, and the circuit board and the conductive rubber key jointly realize the detection of the existence of keys and the force and duration of the keys. The keyboard unit bracket has a rotation axis circular hole 314 on the short L end, and is connected with the lower gear rod 33 through a rotation axis. The keyboard unit passes through the keyboard unit the bracket is fixed on the bracket plate.
Fig. 5 and 6 are schematic views showing the structure of the key lever in the keyboard unit of the present embodiment. The key rod 32 is a stressed body of the key and mainly has a cross rod structure, and the tail end of the cross rod structure is connected with the long L-shaped end of the keyboard unit bracket by placing a rotating shaft in a rotating shaft round hole 321; below the key lever are raised contact points 322, upper teeth 323 and a rotating shaft circular hole 324. The convex contact points 322 are contacted with the conductive rubber keys when the keys are pressed, and indicate that the keys are pressed; the upper rack 323 and the gear on the lower gear rod are meshed with each other in a certain tightness. The rotation shaft is placed inside the rotation shaft round hole 324 so that the key lever is connected with the connecting slide lever 34. The key bar cross bar has two types of upper surfaces, one is without protrusions and is used for white keys, as shown in fig. 5. One type of protrusion, for a black key, is shown as protrusion 325 in FIG. 6.
Fig. 7 is a schematic view showing the structure of the lower gear lever in the keyboard unit of the present embodiment. The lower gear rod 33 provides a lower gear and a slide rail, and is Z-shaped, one end of the lower gear is provided with a lower gear 331 for being engaged with the upper rack 323 in a staggered manner, and the other end of the lower gear is provided with a slide rail 332; the lower surface of the other end is provided with a groove 333 for placing a balancing weight. The lower gear end has a rotation shaft circular hole 334 through which the short L end of the keyboard unit bracket 31 is fitted over the rotation shaft to be coupled together.
Fig. 8 is a schematic view showing a structure of the keyboard unit of the present embodiment to which the slide bar is attached. The connecting sliding rod 34 is connected with the key rod 32 and the lower gear rod 33, one end of the connecting sliding rod is connected with the bottom of the key rod through a rotating shaft round hole 341, the other end of the connecting sliding rod is U-shaped, a round hole 342 is formed in the middle of the connecting sliding rod for placing a rotating shaft, and the rotating shaft penetrates through a sliding rail of the lower gear. The connecting slide rod 34 connects the key rod and the lower gear rod, and when the key is pressed, the rotating shaft on the U-shaped end of the connecting slide rod slides to the other end from one end in the slide rail, and when the key is released, the U-shaped end automatically slides reversely to return. A counterweight block box 343 is arranged on the upper surface of the U-shaped end connected with the sliding rod, and counterweight blocks with different weights are placed in the counterweight block box 343; a cushion block is pasted at the position 344 above the counterweight block box 343, when the keys are lowered, the key rod is in contact with and connected with the impact of the sliding rod, the impact force is buffered to ensure smooth motion transition, and noise is avoided in use.
The keyboard unit has a division of black keys and white keys, mainly the upper surface and length of the key bar are different, as shown in the white key of fig. 5 and the black key of fig. 6, the upper surface of the key bar of the white key has no projection; in addition, because the key moments of the white key and the black key are different, the configured balancing weights are different, and other structures are the same.
Fig. 9 and 10 are schematic views of the keyboard unit with the keyboard case covered in the embodiment. The keyboard shell is made of smooth ABS material, is placed on the key rods on the keyboard unit, the number of the keyboard shell corresponds to that of the keyboard unit, the keyboard shell is divided into black keys and white keys, and the keyboard shell can be directly buckled on the key rods. Fig. 9 shows a schematic view of the white key keyboard unit of the present embodiment with the white keyboard case 41 added thereto, constituting a white key, and fig. 10 shows a schematic view of the black key keyboard unit of the present embodiment with the black keyboard case 41 added thereto, constituting a black key. The black keys are of only one type, while the white keys are of many types, depending on the actual keyboard configuration. If an 88-key keyboard is to be manufactured, 88-key keyboard units and corresponding keyboard shells are assembled according to the arrangement rule of black keys and white keys.
Fig. 11 is a schematic view showing the keyboard unit stand according to the present embodiment with a circuit board placed thereon. A circuit board 51 and two conductive rubber keys 52 are placed on the middle cross bar of the keyboard unit bracket, and the periphery of the circuit board is fixed on the middle cross bar by screws. The protruding contact points 322 of the key lever 32 in the keyboard unit shown in fig. 5 and 6 are in contact with the conductive rubber keys at the time of pressing the keys, indicating that there is a key-pressing action.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (9)
1. A modular electric piano keyboard based on core-shell separation and whole-course rolling and sliding linkage of keys is characterized in that the device comprises a machine core and a plurality of keyboard shells; the core is a keyboard framework in the whole device, and the keyboard shell is buckled at a corresponding position of the core, so that a complete electric piano keyboard can be formed; the movement and the keyboard shell are separated, so that the modular design is facilitated; in the key pressing process, the key-pressed keyboard utilizes the linkage of the gear device and the sliding device to improve the hand feeling of the key and prolong the service life;
the gear device is formed by meshing an upper rack of a keyboard unit in a machine core and gears on a lower gear rod in a certain degree of tightness; in the key touching process, including the key pressing and lifting processes, the whole process is occluded, and a certain resistance is given to the key rod to press, so that the problems that the existing engineering plastics are light in weight and the keyboard playing touch sense is poor are solved;
the sliding device is characterized in that a rotating shaft on the U-shaped end of a keyboard unit in a machine core, which is connected with a sliding rod, slides to the other end from one end in a sliding rail of a lower gear, and the sliding device is in full-range contact in the key touch process, including the key pressing and lifting processes, so that the suspension sense of pressing lever type keys is overcome.
2. The modular electric piano keyboard based on core-shell separation and whole-course rolling-sliding linkage of keys as claimed in claim 1, wherein the core comprises a keyboard support and a plurality of keyboard units; the keyboard support mainly comprises three fixed shafts: 2 upper fixed shafts and 1 lower fixed shaft; the upper fixed shafts comprise 1 upper front fixed shaft and 1 upper rear fixed shaft; the lower fixed shaft is mainly used for supporting the upper fixed shaft; the fixed shaft is a long cylindrical hollow aluminum bar, and two ends of the fixed shaft are fixed on two sides of the whole keyboard; the keyboard units are sequentially sleeved on the upper fixed shaft through the circular holes according to the keyboard rule; the keyboard support is used for placing the keyboard unit.
3. The modular electric piano keyboard based on core-shell separation and full-range key rolling-sliding linkage of claim 2, wherein the keyboard unit mainly comprises a keyboard unit support, a key rod, a lower gear rod and a connecting sliding rod, and is made of ABS.
4. The modular electric piano keyboard based on core-shell separation and whole-course rolling-sliding linkage of keys as claimed in claim 3, wherein the keyboard unit support of the keyboard unit is double-L-shaped, a round hole is formed below the long L-shaped end for the upper rear fixing shaft to pass through, and a round hole of the rotating shaft is formed above the long L-shaped end and connected with the key rod through the rotating shaft; a circuit board and a conductive rubber key are placed on the middle cross bar of the keyboard unit bracket, and the circuit board and the conductive rubber key jointly realize the detection of the existence of keys and the force of the keys; a fixing shaft round hole is formed in the upper surface of the short L end of the keyboard unit bracket, an upper front fixing shaft penetrates through the fixing shaft round hole, the keyboard unit bracket is fixed on the upper front fixing shaft, and meanwhile a lower gear rod is connected to the fixing shaft round hole; the keyboard unit is fixed on the fixed shaft through the keyboard unit bracket.
5. The modular electric piano keyboard based on core-shell separation and whole-course rolling-sliding linkage of keys as claimed in claim 3, wherein the key rod is a stressed body of the keys, mainly has a cross rod structure, and the tail end is connected with the long L-shaped end of the keyboard unit bracket by placing a rotating shaft through a round hole; the lower part of the key rod is provided with a convex contact point, an upper rack and a rotating shaft round hole; the raised contact point is contacted with the conductive rubber key when the key is pressed, and the key action is shown; the gears on the upper rack and the lower gear rod are meshed with each other in a certain tightness; the round hole of the rotating shaft below the key rod is used for connecting the key rod with the connecting sliding rod; the upper surface of the key rod cross bar has two types, one type has bulges, is in the shape of a black key and is used by the black key; one is without protrusions and is used for white keys.
6. The modular electric piano keyboard based on core-shell separation and whole-course key rolling-sliding linkage according to claim 3, wherein the lower gear rod is provided with a lower gear and a slide rail, is Z-shaped, has one end provided with the lower gear for being engaged with the upper rack in a staggered manner, and has the other end provided with the slide rail; a groove is arranged below the other end for placing a balancing weight; the lower gear end has a stationary shaft circular hole, and the short L-shaped end of the keyboard unit bracket is sleeved on the upper rear stationary shaft through the hole so as to be connected together.
7. The modular electric piano keyboard based on core-shell separation and whole-course rolling-sliding linkage of keys as claimed in claim 3, wherein the connecting sliding rod is connected with the key rod and the lower gear rod, one end of the connecting sliding rod is connected with the bottom of the key rod through the opening of the rotating shaft, the other end of the connecting sliding rod is U-shaped, the rotating shaft is placed in the opening in the middle, and the rotating shaft penetrates through the sliding rail of the lower gear; when the key is pressed, a rotating shaft connected with the U-shaped end of the sliding rod slides from one end to the other end in the sliding rail, and when the key is released, the U-shaped end automatically slides reversely to return; a counterweight block box is arranged on the upper surface of the U-shaped end connected with the sliding rod, and counterweight blocks with different weights are placed in the counterweight block box; the cushion block is pasted at the position above the counterweight block box, the key rod is contacted with the impact of the sliding rod when the key is reduced, the impact force is buffered to ensure smooth motion transition, and no noise is generated during use.
8. The modular electric piano keyboard based on core-shell separation and whole-course rolling-sliding linkage of keys as claimed in claim 3, wherein the keyboard unit is divided into black keys and white keys, the main difference is that the upper surfaces of the key rods are different, and the upper surfaces of the white key rods are not provided with bulges; in addition, because the key moments of the white key and the black key are different, the configured balancing weights are different, and other structures are the same.
9. The modular electric piano keyboard based on core-shell separation and whole-course rolling-sliding linkage of keys as claimed in claim 3, wherein the keyboard shell is made of smooth ABS material, is placed on the key rods on the keyboard unit, has the number corresponding to that of the keyboard unit and the number of black keys and white keys, and is directly buckled on the key rods; there is only one type of black key, and there are many types of white keys, depending on the actual keyboard configuration; if the keyboard with 88 keys is manufactured, firstly, the 88 keyboard units and the corresponding keyboard shells are assembled according to the arrangement rule of black keys and white keys.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210453685.XA CN114822459B (en) | 2022-04-24 | 2022-04-24 | Modularized electric piano keyboard based on core-shell separation and whole-course rolling and sliding linkage of keys |
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| CN202210453685.XA CN114822459B (en) | 2022-04-24 | 2022-04-24 | Modularized electric piano keyboard based on core-shell separation and whole-course rolling and sliding linkage of keys |
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| CN114822459A CN114822459A (en) | 2022-07-29 |
| CN114822459B true CN114822459B (en) | 2023-01-31 |
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| CN114822459A (en) | 2022-07-29 |
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