CN216772791U

CN216772791U - Key finger structure for automatic playing piano

Info

Publication number: CN216772791U
Application number: CN202122420521.0U
Authority: CN
Inventors: 胡伟
Original assignee: Guangzhou Yadi Digital Technology Co ltd
Current assignee: Guangzhou Yadi Digital Technology Co ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-06-17
Anticipated expiration: 2031-09-30

Abstract

The utility model discloses a key finger structure for an automatic player piano, which belongs to the field of automatic player pianos and comprises a cylinder, a player pin and a magnetic field generator, wherein the player pin is positioned in the cylinder, the magnetic field generator is positioned at the periphery of the cylinder, and the player pin is positioned in a magnetic field generated by the magnetic field generator and is in sliding fit with the inner wall of the cylinder along the length direction of the cylinder. The key finger structure for the automatic player piano is suitable for an external key driving structure, can simulate the knocking action and the knocking force of a finger on a key, and does not need to be connected with a power transmission assembly of the key and disassembled.

Description

Key finger structure for automatic playing piano

Technical Field

The utility model relates to the field of pianos, in particular to a key finger structure for an automatic playing piano.

Background

An automatic playing piano is a software and hardware combined automatic playing system, a software-controlled driving device is usually adopted to control keys and a piano pedal, in order to install the keys and the piano pedal driving device, the piano is usually required to be disassembled, and then a driver corresponding to each key is installed on a power transmission assembly of the key, so that the corresponding code is driven to produce sound instead of the pressing action of the key. Such an automatic player piano is very arduous in actual assembly, so that it is generally necessary to damage the original structure of the piano, so that the piano is difficult to restore once it is modified into an automatic player piano, which greatly reduces the modification will of the piano.

Chinese patent document publication No. CN211124973U a but vertical piano action of automatic playing, including keyboard mechanism, transmission assembly is connected on keyboard structure one end upper portion, and the lower part is equipped with the automatic subassembly of playing, on transmission assembly was fixed in total shelves, the subassembly of beating was connected to the upper end, the string subassembly is connected to total shelves one side, beat the subassembly accessible transmission and beat the string subassembly, beat and install the silence subassembly between subassembly and the string subassembly. The device has two working modes of manual practice playing and automatic playing. The automatic player piano action is of a built-in driving structure, which is very complicated to install and is difficult to modify into an automatic player piano of this structure on the existing ordinary piano.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a key finger structure for an automatic player piano, which is suitable for an external key driving structure, can simulate the knocking action and the knocking force of a finger on a key, and does not need to be connected with a power transmission assembly of the key and does not need to be detached.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a key finger structure for an automatic playing piano, which comprises a cylinder, a playing pin and a magnetic field generator, wherein the playing pin is positioned in the cylinder, the magnetic field generator is positioned at the periphery of the cylinder, and the playing pin is positioned in a magnetic field generated by the magnetic field generator and is in sliding fit with the inner wall of the cylinder along the length direction of the cylinder.

The utility model has the further scheme that the playing pin comprises a steel core and a guide sliding sleeve matched with the inner diameter of the cylinder body, the guide sliding sleeve is sleeved on the steel core, and the guide sliding sleeve is in sliding fit with the inner wall of the cylinder body.

The utility model has the further scheme that the playing pin further comprises a knocking cap, and the knocking cap is in inserted connection with the bottom of the steel core.

The utility model further provides that the knocking cap comprises a structural ring and a counterweight part, the structural ring is fixed at the upper part of the counterweight part, a through hole is formed in the middle of the counterweight part, and the counterweight part is in inserted connection and matching with the bottom of the steel core through the through hole.

The utility model further provides that the bottom of the knocking cap is provided with a flexible pad.

A further aspect of the utility model is that it further comprises keys located below the pins.

It is a further aspect of the present invention that the key reset force of the keys is greater than or equal to the weight of the hands.

The utility model further discloses a return spring, wherein an annular baffle plate with a round hole is arranged on the inner wall of the cylinder body, the return spring is sleeved on the playing needle, the first end of the return spring is close to one end of the guide sliding sleeve or the first end of the return spring is abutted against the end part of one end of the guide sliding sleeve, and the second end of the return spring is abutted against the annular baffle plate.

The utility model further provides that the magnetic field generator comprises a pulse driving board and a coil, wherein the coil is wound on the barrel body, and the coil is electrically connected with the pulse driving board through a lead.

The utility model is further characterized in that the magnetic field generator further comprises an information exchanger with a wireless module and a control terminal, wherein the information exchanger is electrically connected with the magnetic field generator, and the information exchanger is wirelessly connected with the control terminal through the wireless module.

The utility model has the further scheme that the filtering box body also comprises at least one water pump, the water inlet end of the water pump is communicated with the circulating water channel, and the water outlet end of the water pump is communicated with the first-stage filtering cavity.

The utility model has the beneficial effects that:

the key finger structure for the automatic player piano is provided with the cylinder, the player pin and the magnetic field generator, wherein the magnetic field generator can perform electromagnetic induction with the player pin so as to drive the player pin to move up and down along the cylinder, so that the key is knocked, and the knocking force of the player on the key can be adjusted by adjusting the magnetic field intensity of the magnetic field generator. The key finger structure can directly knock the key, is similar to the knock of the finger on the key, is very convenient to apply to an external key driving structure, can simulate the knock action and force of the finger on the key, and is easy to install and disassemble.

Drawings

Fig. 1 is a schematic structural diagram of a key finger structure provided in the first embodiment of the present invention;

FIG. 2 is a cross-sectional view of a key finger structure provided in one embodiment of the present invention in a first state;

FIG. 3 is a sectional view of a key finger structure provided in one embodiment of the present invention in a second state;

fig. 4 is a schematic structural diagram of a key finger structure provided in the second embodiment of the present invention.

In the figure:

1. a barrel; 2. a playing pin; 3. a magnetic field generator; 21. a steel core; 22. a guide sliding sleeve; 23. knocking the cap; 231. a structural ring; 232. a counterweight portion; 233. a through hole; 234. a flexible pad; 4. keys of keys; 5. a return spring; 11. an annular baffle; 31. a pulse drive board; 32. a coil; 6. an information exchanger; 7. a control terminal; 12. a limit ring plate.

Detailed Description

The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.

Example one

As shown in fig. 1 to 3, the key finger structure for an automatic player piano provided in this embodiment includes a cylinder 1, a player pin 2, and a magnetic field generator 3 electromagnetically inductive with the player pin 2, the cylinder 1 is cylindrical, the player pin 2 is located in the cylinder 1, the magnetic field generator 3 is located at the periphery of the cylinder 1, usually, a coil 32 of the magnetic field generator 3 is wound on the cylinder 1 or a pulsed magnetic field generator capable of continuously generating magnetic field pulses is used to generate magnetic field pulses to drive the player pin 2 to strike the keys 4, and the player pin 2 is located in the magnetic field generated by the magnetic field generator 3 and is in sliding fit with the inner wall of the cylinder 1 along the length direction of the cylinder 1. After magnetic field generator 3 produced the magnetic field, will drive going on of steel performance needle 2 down the motion, thereby strike key 4, magnetic field generator 3 realizes striking of one time through producing the magnetic field pulse, just can adjust the dynamics of striking of performance needle 2 to key 4 through adjusting magnetic field intensity, because barrel 1 adopts cylindrical tubular structure, it is very convenient to install on external key drive structure, play needle 2 simultaneously also can be very convenient slide from top to bottom along barrel 1, thereby reach the purpose of imitating the action of striking and the dynamics of finger to the key.

In a further embodiment, in order to promote the stability of the vertical motion of the playing pin 2 in the barrel 1, the playing pin 2 includes a steel core 21 and a guide sliding sleeve 22 matched with the inner diameter of the barrel 1, the guide sliding sleeve 22 is sleeved on the steel core 21, the guide sliding sleeve 22 is in sliding fit with the inner wall of the barrel 1, the guide sliding sleeve 22 is cylindrical, the outer diameter of the guide sliding sleeve 22 is matched with the inner diameter of the barrel 1, the guide sliding sleeve 22 is limited through the barrel 1, and the guide sliding sleeve 22 can only move vertically along the direction of the barrel 1. The steel core 21 can perform electromagnetic induction by the magnetic field generator 3 and move up and down under the action of the magnetic field generator 3.

In order to increase the contact area between the bottom of the player pin 2 and the key 4 and simulate the finger to contact the key 4, further, the player pin 2 further comprises a knocking cap 23, and the knocking cap 23 is in inserted fit with the bottom of the steel core 21. The steel core 21 drives the knocking cap 23 to knock the key 4. Further preferably, strike cap 23 includes structural ring 231 and counter weight portion 232, structural ring 231 and counter weight portion 232 are the columnar body, structural ring 231 is fixed on the upper portion of counter weight portion 232, the middle part of counter weight portion 232 is provided with through-hole 233, counter weight portion 232 passes through the bottom grafting cooperation of through-hole 233 with steel core 21, counter weight portion 232 can increase the inertial force that the player needle 2 strikes the in-process to key 4, thereby increase the power of striking to key 4, better simulation finger is to the striking of key 4, structural ring 231 then is convenient for cup joint counter weight portion 232 at steel core 21, can make the one end tip of steel core 21 insert to the through-hole 233 at counter weight portion 232 middle part through interference fit's mode through breaking structural ring 231 off. Further preferably, the bottom of the knocking cap 23 is provided with a flexible pad 234, and the flexible pad 234 is usually made of a flexible material such as rubber or silica gel, which can effectively prevent the key 4 from being painted or scratched after being knocked.

In a further embodiment, the key finger structure for an automatic player piano provided in the present embodiment further includes keys 4, the keys 4 being located below the pins 2, and the keys 4 being struck like fingers when the pins 2 are moved up and down. Preferably, the key reset force of the key 4 is larger than or equal to the gravity of the playing pin 2, when the key 4 of the piano is released after being pressed, the key 4 has a certain key reset force to reset the key 4, when the magnetic field generator 3 does not act on the playing pin 2, the bottom of the playing pin 2 is tightly attached to the key 4 under the action of the gravity, at the moment, if the key reset force of the key 4 is larger than or equal to the gravity of the playing pin 2, the key 4 drives the playing pin 2 to move upwards when being reset, so that the automatic reset of the playing pin 2 is realized, the reset mode utilizes the key reset force of the key 4 to realize the automatic reset of the playing pin 2, and the structural complexity of the key finger structure is greatly reduced.

In a further embodiment, the magnetic field generator 3 comprises a pulse driving plate 31 and a coil 32, the coil 32 is wound on the barrel 1, and the coil 32 is electrically connected with the pulse driving plate 31 through a wire. Be provided with the spacing ring board 12 that is used for being convenient for coil 32 coiling on the outer wall of barrel 1, coil 32 twines in the cell body between two spacing ring boards 12, and coil 32 is connected through the wire and pulse drive plate 31 electricity, and pulse drive plate 31 makes coil 32 produce the pulsed magnetic field to the drive is played needle 2 rhythmically and is strikeed key 4.

The key finger structure for the automatic player piano provided in this embodiment further includes an information exchanger 6 and a control terminal 7, the information exchanger 6 is electrically connected to the magnetic field generator 3, the information exchanger 6 is wirelessly connected to the control terminal 7 through a wireless module, the control terminal 7 is a desktop computer, a notebook computer, a mobile phone, or a tablet computer, the control terminal 7 sends a control command according to the music score and transmits the control command to the information exchanger 6 through the wireless module, the information exchanger 6 converts the information exchanger 6 into a driving command and transmits the driving command to the pulse driving board 31, and the pulse driving board 31 executes the driving command to enable the player needle 2 to perform a tapping action.

Example two

As shown in fig. 4, the key finger structure for an automatic player piano provided in the present embodiment includes a cylinder 1, a player pin 2, and a magnetic field generator 3 electromagnetically induced to the player pin 2, the magnetic field generator 3 is located at the periphery of the cylinder 1, and the player pin 2 is located in a magnetic field generated by the magnetic field generator 3 and slidably fitted to the inner wall of the cylinder 1 along the length direction of the cylinder 1. The difference between the first embodiment and the second embodiment is that:

the key finger structure for the automatic player piano provided in the embodiment further comprises a return spring 5, an annular baffle plate 11 with a round hole is arranged on the inner wall of the cylinder body 1, the return spring 5 is sleeved on the player pin 2, the first end of the return spring 5 is close to one end of the guide sliding sleeve 22 or the first end of the return spring 5 is abutted against the end part of one end of the guide sliding sleeve 22, and the second end of the return spring 5 is abutted against the annular baffle plate 11. When the player pin 2 moves downwards, the guide sliding sleeve 22 compresses the return spring 5, and after the player pin 2 is knocked, the return spring 5 generates restoring force, so that the player pin 2 is automatically reset, namely, the reset is realized through the return spring 5.

While the utility model has been described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the utility model. The present invention is not to be limited by the specific embodiments disclosed herein, and other embodiments that fall within the scope of the claims of the present application are intended to be within the scope of the present invention.

Claims

1. A key finger structure for an automatic player piano, comprising:

a cylinder (1);

the playing pin (2), the playing pin (2) is positioned in the barrel (1);

with play needle (2) electromagnetic induction's magnetic field generator (3), magnetic field generator (3) are located the periphery of barrel (1), play needle (2) are located in the magnetic field that magnetic field generator (3) produced, and along the length direction of barrel (1) with the inner wall sliding fit of barrel (1).

2. The key finger structure for an automatic player piano according to claim 1, wherein:

the playing pin (2) comprises a steel core (21) and a guide sliding sleeve (22) matched with the inner diameter of the barrel body (1), the guide sliding sleeve (22) is sleeved on the steel core (21), and the guide sliding sleeve (22) is in sliding fit with the inner wall of the barrel body (1).

3. The key finger structure for an automatic player piano according to claim 1 or 2, wherein:

the playing pin (2) further comprises a knocking cap (23), and the knocking cap (23) is in insertion fit with the bottom of the steel core (21).

4. The key finger structure for an automatic player piano according to claim 3, wherein:

strike cap (23) and include structural ring (231) and counter weight portion (232), structural ring (231) are fixed the upper portion of counter weight portion (232), the middle part of counter weight portion (232) is provided with through-hole (233), counter weight portion (232) pass through-hole (233) with the cooperation of pegging graft of the bottom of steel core (21).

5. The key finger structure for an automatic player piano according to claim 4, wherein:

the bottom of the knocking cap (23) is provided with a flexible pad (234).

6. The key finger structure for an automatic player piano according to claim 1, wherein:

still include key (4), key (4) are located play needle (2) below.

7. The key finger structure for an automatic player piano according to claim 6, wherein:

the key resetting force of the keys (4) is larger than or equal to the gravity of the playing pins (2).

8. The key finger structure for an automatic player piano according to claim 2, wherein:

still include reset spring (5), barrel (1) inner wall is provided with ring baffle (11) that have the round hole, reset spring (5) cover is on playing needle (2), the first end of reset spring (5) is close to the one end of direction sliding sleeve (22) perhaps the first end of reset spring (5) with the one end tip of direction sliding sleeve (22) offsets, the second end of reset spring (5) with ring baffle (11) offset.

9. The key finger structure for an automatic player piano according to claim 1, wherein:

the magnetic field generator (3) comprises a pulse driving plate (31) and a coil (32), the coil (32) is wound on the barrel (1), and the coil (32) is electrically connected with the pulse driving plate (31) through a lead.

10. The key finger structure for an automatic player piano according to claim 1, wherein:

the system also comprises an information exchanger (6) with a wireless module and a control terminal (7);

the information exchanger (6) is electrically connected with the magnetic field generator (3), and the information exchanger (6) is wirelessly connected with the control terminal (7) through the wireless module.