CN2360905Y - Lever plumbing arm type keyboard of electronic piano - Google Patents
Lever plumbing arm type keyboard of electronic piano Download PDFInfo
- Publication number
- CN2360905Y CN2360905Y CN 98233408 CN98233408U CN2360905Y CN 2360905 Y CN2360905 Y CN 2360905Y CN 98233408 CN98233408 CN 98233408 CN 98233408 U CN98233408 U CN 98233408U CN 2360905 Y CN2360905 Y CN 2360905Y
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- lever
- sheet metal
- supporting mass
- metal supporting
- key
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Abstract
The utility model discloses a lever plumbing arm type keyboard of an electronic piano, comprising a metal plate supporting body, piano keys and a circuit board. The utility model is characterized in that both ends of the metal plate supporting body form L-shaped structures, and the middle part is a flat and straight part, wherein, one end of the metal plate supporting body is provided with two bulged elements which are wrapped by plastic; the metal plate supporting body is also provided with levers and plumbing arms which are equal to the piano keys in number; the plumbing arms are placed below the flat and straight part of the metal plate supporting body; the levers are placed at the upper part of the flat and straight part, and the levers passing through holes on the metal supporting body are connected with the plumbing arms into a whole. The utility model has the advantage that the touch feeling transmitted to figures of a player from the piano can be improved, and the touch feeling approaches to the touch feelinf of playing a real piano.
Description
The utility model relates to a kind of keyboard structure of pianotron.
Along with the application of large scale integrated circuit, pianotron is changing the idea of people about piano.Pianotron can be played multiple music and carry out the performance of various ways, its tone color is many and very dulect, more need not resemble adjustment accuracy in pitch in regular ground the true piano, can make environment reach quiet effect when practicing qin, can realize that in conjunction with electronic control system a teacher teaches several students' purpose.
But in the evolution of pianotron, a subject matter is: how as much as possible the keyboard of pianotron the sense of touch of approaching true piano.And will address this problem, must solve following problem:
1, key must balance.
2, the dynamics of playing must meet the sense of touch of true piano, promptly must have true piano hammer to hit the sense of touch of string; Simultaneously,, promptly can not too be easy to press key and resilience, also too big resistance can not be arranged when depressing and during resilience, key must have the principle of similitude of true piano lever motion.Playing strength must conform to true piano.
This sound when 3, repeating to play apace a key, can not produce unnecessary sound, because may change actual tone color.
4, have and the true similar volume control characteristic of piano, when promptly light (slowly) played, pianotron was little sound or sounding not, and when heavy (soon) played, pianotron was with loudly.
The purpose of this utility model is, a kind of pianotron lever plumbing arm formula keyboard is provided, and utilizes this keyboard, can improve the sense of touch that is passed to player's finger by key, and this sense of touch is very approaching when playing true piano.And has the low and high superperformance of production efficiency of cost.
The technical solution of the utility model is as follows: a kind of pianotron lever plumbing arm formula keyboard, comprise sheet metal supporting mass, key and circuit board, it is characterized in that, the two ends of described sheet metal supporting mass are L shaped structure, the centre is a straight portion, and wherein an end has two protruding members that encased by plastic cement; And be provided with lever, plumbing arm with the key equal number, described plumbing arm is positioned at below the straight portion of described sheet metal supporting mass, and lever is positioned at the top of straight portion and the hole and the plumbing arm that pass on the metal support are connected as a single entity; By the lever sway brace lever and plumbing arm and sheet metal supporting mass are linked; Described sheet metal supporting mass has suitable structure and admits described key; On described sheet metal supporting mass, be provided with conducting resinl, be provided with rubber sleeve in the end, upper end of lever with corresponding position, the lower end of lever; Described conducting resinl is connected with described circuit board.
In the utility model, be stuck in wherein by the tail end of the slotted eye on the sheet metal supporting mass, and between lever and key, be provided with an elastic resistance steel disc key at the keyboard rear portion.Suitable position at the sheet metal supporting mass is pasted with carpet bar and soft shim liner.
Aforesaid the utility model pianotron lever plumbing arm formula keyboard, when depressing the rubber interplanting relative motion of key and key inside surface and lever upper end to a certain specific stroke, the lever lower end contacts with conducting resinl, will produce a slight resilience this moment, as freely feeling at the true piano of bullet; When these keys are depressed, reach the plumbing arm that is connected as a single entity with lever by the lever that is positioned at these key lower surfaces and press conducting resinl, electrically contact (even circuit turn-on) except generation like this and sounding, also help and when unclamping, make key bounce back into original state; Slotted eye on the aided metal plate and being stuck in wherein is as the method that is fixed in the sheet metal supporting; Between lever and key, be provided with an elastic resistance steel disc, it makes key can eliminate unwanted slight vibration when playing, and it also helps the quick loading and unloading of key simultaneously; Suitable position at the sheet metal supporting mass is pasted with carpet bar and soft shim liner, can eliminate mechanical collision and grating that lever and plumbing arm may take place when motion, impulsive force in the time of can cushioning simultaneously lever and plumbing arm and move up and down, make the sense of touch of feeling to approach true piano of pressing the key finger, simultaneously can make the tolerance clearance between key and the metal support slotted eye control to optimum condition, adjust the submergence depth of key; Impulsive force in the time of simultaneously can also cushioning the key resilience makes the key motion more steady.
Below in conjunction with drawings and Examples the utility model is described in further detail.
Fig. 1 represents the sectional view that the sheet metal supporting mass is main.
The partial plan of Fig. 2 presentation graphs 1 sheet metal supporting mass.
Fig. 3 represents that parts such as lever, plumbing arm and lever sway brace, circuit board, conducting resinl are assemblied in the sectional view on the sheet metal supporting mass.
Fig. 4 represents black key lever, plumbing arm structural representation.
Fig. 5 represents white key lever, plumbing arm structural representation.
Fig. 6 represents that the utility model keyboard is corresponding to the white key virgin state of A---A line cut-open view among Fig. 2.
Fig. 7 represents the state cut-open view of the utility model keyboard when the white key of A---A line is depressed among Fig. 2.
Fig. 8 represents that the utility model keyboard is corresponding to B---B line black key virgin state cut-open view among Fig. 2.
Fig. 9 represents the state cut-open view of the utility model keyboard when B---B line black key is depressed among Fig. 2.
Above-mentioned accompanying drawing has provided the specific embodiments of an exemplary embodiments of the utility model.The utility model pianotron lever plumbing arm formula keyboard shown in above-mentioned each figure, comprise sheet metal supporting mass 1, key 30,32 and circuit board 25, wherein the two ends of sheet metal supporting mass 1 are L shaped structure 2, and the centre is a straight portion 3, and wherein an end has two protruding members 4 that encased by plastic cement 5; And be provided with lever 23, plumbing arm 22 with key 30,32 equal numbers, plumbing arm 22 is positioned at the straight portion of sheet metal supporting mass 1 below 3, and lever 23 is positioned at the top of straight portion 3 and the hole and the plumbing arm 22 that pass on the metal support 1 are connected as a single entity; By lever sway brace 24 lever 23 and plumbing arm 22 are linked with sheet metal supporting mass 1; Sheet metal supporting mass 1 has suitable structure and admits key 30,32; On sheet metal supporting mass 1, be provided with conducting resinl 26, be provided with rubber sleeve 33 in the end, upper end of lever 23 with corresponding position, the lower end of lever 23; Conducting resinl 26 is connected with circuit board 25.
As Fig. 1, Fig. 6, Fig. 7, Fig. 8 and shown in Figure 9, protruding member 4 is same integrative-structure with sheet metal supporting mass 1, plays a part to stablize key.
As shown in Figure 1,, row's screw hole 13 is arranged respectively, utilize these screw holes 13 integral keyboard can be fixed in the fender or on any straight plane in the bottom of L shaped structure.
As shown in Figure 6, carpet bar 6 and 7 sticks on the bottom and the top of left end L shaped 2, with the impact that buffering plumbing arm 22 swings up and down, and the mechanic sound that produces in the time of can eliminating plumbing arm 22 swings simultaneously.
As shown in Figure 6, carpet bar 9 sticks on the below of slotted eye 15, and is wherein concordant with one side of slotted eye 15 on one side, with the impulsive force of buffering lever 23 when sway brace 24 turns round, and the unnecessary mechanic sound that produces in the time of can eliminating lever 23 revolutions simultaneously.
The utility model keyboard principle of work is as follows: as Fig. 6, Fig. 7 and shown in Figure 9, when depressing key (Bai Jian 30 or black key 32), key contacts with rubber sleeve element 33 earlier, issuable grating and help between the two relative motion when removing rubber sleeve 33 with the key relative motion scribbles low viscous cup grease on rubber sleeve 33 tops; Lever 23 is around 24 revolutions of lever sway brace simultaneously, and when key moves downward certain stroke, the bottom of lever 23 will contact conducting resinl 26; Key continues to move downward, and conducting resinl 26 will contact circuit plate 25, at this moment, links to each other with pianotron as the interface of this keyboard, and pianotron will sounding; Conducting resinl 26 cooperates keyboard scan software, can realize and the true similar volume control characteristic of piano, and when promptly light (slowly) plays, the little sound of pianotron or mute, when heavy (soon) plays, pianotron will be loud.Along with playing the different dynamics that time finger uses, changing will appear in volume.
As shown in Figure 6, soft shim liner 8 sticks on sheet metal supporting mass 1 near the L shaped element 2 of left end, the high order end of straight portion 3, one end of white key 30 and black key 32 is stuck in the slotted eye 14 of metal plate support body 1, soft shim liner 8 can play to be adjusted key and is assemblied in gap in the slotted eye 14, can remove the unnecessary sound that is produced during around the bayonet motion of slotted eye 14 when key simultaneously.
As Fig. 1, Fig. 2 and shown in Figure 6, lever sway brace 24 1 ends are stuck in the slotted eye 16 of sheet metal supporting mass 1, and the other end is fixed on circuit board 25 and Z-shaped sheet metal retaining element 29 in the circular hole 18 of sheet metal supporting mass 1 by screw 28; The right part of wiring board 25 by Plastic fastener 27 fixing in the elliptical aperture 19 of sheet metal supporting mass 1; As shown in Figure 2, the elliptical aperture 19 on the sheet metal supporting mass 1, part one end also has the slotted eye of strip, and the slotted eye of this strip promptly is used for fixing Plastic fastener 27 and circuit board 25; Conducting resinl 26 is fixed on the circuit board 25, and its jut passes the slotted eye 19 of sheet metal supporting mass 1, and the upper end is relative with the lower end of lever; The strong point of lever sway brace 24 passes slotted eye 17, and sway brace 24 cooperates with the relevant position (being the face of cylinder in the present embodiment) of lever 23, and the fit system on the face of cylinder can be guaranteed the lever revolution steadily.Be coated with simultaneously the moderate cup grease of toughness at the mating surface place, the unnecessary mechanic sound that produces when reducing friction can guarantee that the face of cylinder cooperates closely simultaneously.
As previously mentioned, encase the plastic cement element 5 of the protruding member 4 of sheet metal supporting mass 1, can play and stablize the key effect, in order to eliminate the grating that relative motion produces between the plastic cement element 5 that may exist and key 30 and 32, be coated with the moderate lubricating jelly of toughness in the both sides of plastic cement element 5, this plastic parts 5 will have to a certain degree pliability simultaneously.
Carpet 12 sticks on the metal plate support body 1 between two protruding members 4, and is to remove the strike note that may produce when key 30 and 32 is played downwards, particularly important when particularly gravity is played; Impulsive force when simultaneously carpet 12 is gone back the available buffer key and played downwards.
1, carpet 10 and 11 flatness that can regulate key guarantee that the difference in height under virgin state reduces to minimum between key and the key.
2, carpet 10 and 11 can also be adjusted the submergence depth of key, and when guaranteeing normally to play, the submergence depth of key is consistent with true piano.
3, carpet 10 and 11 can guarantee that key and lever 23 have certain precompression at the contact point of rubber sleeve 33, and this precompression the rocking of key can prevent virgin state the time.
Impulsive force when 4, carpet 10 and 11 clearly can cushion the key resilience.Carpet 10 and 11 surface are pasted with the certain flexible thin colloid of band.
When the player plays the keyboard that uses the present technique manufacturing, initial dynamics is from the gravity of plumbing arm 22, when sinking certain stroke, the lower end extruding conducting resinl 26 of lever 23, make the player slightly feel resistance, produce resilience gently thus, its sensation is as because complete depressible keys reaches when return is put the sensation by true piano produced.
Shown in Fig. 6 (or Fig. 8), key 30 (or 32) relies on the tail end open card on the slotted eye 14 of metal support 1, and front end then relies on the rubber sleeve 33 from plumbing arm 27 gravity to support, and can produce necessary controlled vibration when making key moving like this; Between lever 23 and key 30 (or 32), be provided with an elastic resistance steel disc 31, this elastic resistance steel disc 31 can be eliminated slight vibration, simultaneously this elastic resistance steel disc 31 and lever 23, plumbing arm 22 and sway brace 24 constituted be similar to true piano hit the string leverage; Analysis with power, different according to the increase of sinking stroke when pressing key to the reacting force of finger, at first be from the gravity of plumbing arm 22 and the tension force of elastic resistance steel disc 31, when lever 23 begins to push conducting resinl 26, will produce resistance again, simultaneously the elastic force of elastic resistance steel disc 31 changes along with the difference of distortion, when lever 23 when contacting carpet 9, will produce cushion effect again; During the resilience key, pass through the resilience of carpet 9 successively, the disappearance of conducting resinl 26 resistances, the variation of elastic resistance steel disc 31 tension force, last plumbing arm 22 contact carpets 6 produce cushion effect; The variation of power has illustrated that all this keyboard has the sensation that is similar to true piano in above-mentioned motion process and the motion process; Simultaneously, when repetition and quick keystroke, above-mentioned carpet 6,7,9,10,11,12 and soft shim liner 8 all help to prevent undesired unexpected take-off and resilience (this resilience has also been changed the needed tone color of player except producing offending sensation).
Obviously, above-mentioned the utility model pianotron lever plumbing arm formula keyboard has solved following problem:
1, the balance and stability of key.
2, similar or approach the dynamics sense of touch of true piano.
Unexpected take-off and resilience when 3, repeating keystroke fast, and unnecessary sound is all eliminated.
4, can realize and the true similar volume control performance of piano.
5, securing member is less, and assembling and dismounting all are very easy to, and good trading off is arranged between low cost and production efficiency.
Claims (9)
1, a kind of pianotron lever plumbing arm formula keyboard, comprise sheet metal supporting mass (1), key (being white key 30 and black key 32) and circuit board (25), it is characterized in that, the two ends of described sheet metal supporting mass (1) are L shaped structure (2), the centre is straight portion (3), and wherein an end has two protruding members (4) that encased by plastic cement (5); And be provided with and lever (23), the plumbing arm (22) of key (30,32) equal number, described plumbing arm (22) is positioned at below the straight portion (3) of described sheet metal supporting mass (1), and lever (23) is positioned at the top of straight portion (3) and the hole (15) and the plumbing arm (22) that pass on the metal support (1) are connected as a single entity; By lever sway brace (24) lever (23) and plumbing arm (22) are linked with sheet metal supporting mass (1); Described sheet metal supporting mass (1) has suitable structure and admits described key (30,32) corresponding position, lower end last at described sheet metal supporting mass (1) and lever (23) to be provided with conducting resinl (26), is provided with rubber sleeve (33) in the end, upper end of lever (23); Described conducting resinl (26) is connected with described circuit board (25).
2, keyboard according to claim 1 is characterized in that, is provided with slotted eye (14) on the left end top of described sheet metal supporting mass (1), and the tail end of described key (30,32) is stuck in the described slotted eye (14); And between lever (23) and key (30,32), be provided with an elastic resistance steel disc (31).
3, keyboard according to claim 1 is characterized in that, is pasted with carpet bar and soft shim liner at the suitable position of described sheet metal supporting mass (1).
4, keyboard according to claim 3 is characterized in that, in the bottom of described L shaped structure (2), row's screw hole (13) is arranged respectively, and bottom and top that carpet bar 6 and 7 sticks on the L shaped structure of left end (2) are pasted with carpet bar (6) and (7).
5, keyboard according to claim 3 is characterized in that, is pasted with carpet bar (9) in the below of described hole (15).
6, keyboard according to claim 3 is characterized in that, the high order end that sticks on close L shaped element of left end (2) of sheet metal supporting mass (1) and straight portion (3) at described soft shim liner (8) is pasted with soft shim liner (8).
7, keyboard according to claim 1, it is characterized in that, described lever sway brace (24) one ends are stuck in the slotted eye (16) of sheet metal supporting mass (1), and the other end is fixed on circuit board (25) and Z-shaped sheet metal retaining element (29) in the circular hole (18) of sheet metal supporting mass (1) by screw (28); The right part of wiring board (25) is passed through in the fixing elliptical aperture in sheet metal supporting mass (1) (19) of Plastic fastener (27).
8, keyboard according to claim 1 is characterized in that, described conducting resinl (26) is fixed on the circuit board (25), and the jut of conducting resinl (26) passes the slotted eye (19) of sheet metal supporting mass (1), and the upper end is relative with the lower end of described lever (23); The strong point of described lever sway brace (24) passes the slotted eye (17) on the sheet metal supporting mass (1), the face of cylinder corresponding matching of sway brace (24) and lever (23).
9, keyboard according to claim 3, it is characterized in that, between last two protruding members of described metal plate support body (1) (4), be pasted with carpet (12), be pasted with carpet (10) and (11) in the lower end of two protruding members (4) of sheet metal supporting mass (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98233408 CN2360905Y (en) | 1998-11-26 | 1998-11-26 | Lever plumbing arm type keyboard of electronic piano |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98233408 CN2360905Y (en) | 1998-11-26 | 1998-11-26 | Lever plumbing arm type keyboard of electronic piano |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2360905Y true CN2360905Y (en) | 2000-01-26 |
Family
ID=33982152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98233408 Expired - Fee Related CN2360905Y (en) | 1998-11-26 | 1998-11-26 | Lever plumbing arm type keyboard of electronic piano |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2360905Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303851B (en) * | 2007-05-07 | 2011-07-27 | 雅马哈株式会社 | Electronic keyboard instrument |
-
1998
- 1998-11-26 CN CN 98233408 patent/CN2360905Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101303851B (en) * | 2007-05-07 | 2011-07-27 | 雅马哈株式会社 | Electronic keyboard instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |