CN113112890A - Finger force exercise device for piano playing - Google Patents
Finger force exercise device for piano playing Download PDFInfo
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- CN113112890A CN113112890A CN202110409295.8A CN202110409295A CN113112890A CN 113112890 A CN113112890 A CN 113112890A CN 202110409295 A CN202110409295 A CN 202110409295A CN 113112890 A CN113112890 A CN 113112890A
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- block body
- vertical rod
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B15/00—Teaching music
- G09B15/06—Devices for exercising or strengthening fingers or arms; Devices for holding fingers or arms in a proper position for playing
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Abstract
The invention discloses a finger force exercise device for piano playing, and belongs to the technical field of piano exercise auxiliary equipment. This piano is played and is used finger force exercise device includes: a vertical rod penetrates through the through hole of the first block body, a first pressure spring penetrates through the vertical rod, the upper end of the first pressure spring is abutted against the lower surface of the first block body, the lower end of the first pressure spring is abutted against a baffle ring, the baffle ring is fixed on the vertical rod, and the lower end of the vertical rod is provided with a roller; the finger force training device for piano playing is matched with the piano playing for use, the force of a practicer for pressing a key is represented by the thickness degree of a line left on the arc surface by a marking pen, the arc surface is provided with a pen point used for abutting against the marking pen, the closer the pen point is to the bottom edge of the arc surface, the larger the contact area between the arc surface and the pen point of the marking pen is, and the problem that the practicer breaks away from the piano playing training finger force to feel that the finger force training effect is not obvious when the piano is played again is solved.
Description
Technical Field
The invention relates to the technical field of piano practice auxiliary equipment, in particular to a finger force practice device for piano playing.
Background
The piano is a keyboard instrument in Western classical music and is known as the king of the instrument. It is composed of 88 keys (52 white keys, 36 black keys) and a metal string sound board.
The piano has the name of the king of the musical instrument, more and more children use the piano as the object of musical instrument learning at present, but for beginners, the piano playing rhythm and playing strength of each note need to be mastered, the existing finger force training device for piano playing mostly breaks away from the piano, the force on fingers is trained simply, when the piano is really played, the piano is touched, the correct playing strength cannot be applied to each note, the piano playing finger force training effect is not obvious, and the finger force training device for piano playing is designed aiming at the problem.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a finger force exercise device for piano playing.
The invention provides a finger force exercise device for piano playing, comprising:
the vertical rod penetrates through the through hole, the first pressure spring penetrates through the vertical rod, the upper end of the first pressure spring is abutted against the lower surface of the first block, the lower end of the first pressure spring is abutted against the baffle ring, the baffle ring is fixed on the vertical rod, and the lower end of the vertical rod is provided with a roller; the upper end of the vertical rod is connected with the tail part of the marking pen through a second pressure spring, and the marking pen is horizontally arranged; the bottom surface of the second block body is fixedly connected with the top surface of the first block body, and the second block body is positioned at the left side of the first block body;
the right flank of second block is the inclined plane, and the lower limb on inclined plane is close to the montant, and the inclined plane is equipped with the cambered surface along its upper and lower direction, and along with the top edge of cambered surface constantly extends to the lower limb, the degree of curvature of cambered surface is big more, the nib of cambered surface butt marker pen.
Preferably, the first block is provided with a threaded hole, the threaded hole is parallel to the through hole, the upper end of the threaded hole is connected with a screw, the lower end of the screw is fixedly connected with one end of a tension spring, and the other end of the tension spring is connected with the sucker.
Preferably, a sliding rod transversely penetrates through the middle of the vertical rod, a rack is fixedly connected along the length direction of the sliding rod, the rack is meshed with a gear, the gear is fixedly connected with an output shaft of a first motor, and the first motor is arranged inside the vertical rod; the upper end of the sliding rod is provided with a pressure sensor which is abutted against the end part of the second pressure spring; the first motor and the pressure sensor are electrically connected with the processor, and the processor is arranged inside the first block body.
Preferably, the inclined plane is provided with a vertical groove, two side walls of the groove are provided with first rollers, the top of the second block is provided with a second roller, the second roller is fixedly connected with an output shaft of a second motor, the second motor is fixed at the top of the second block, and the second motor is electrically connected with the processor.
Preferably, a telescopic rod penetrates through the second pressure spring, one end of the telescopic rod is fixed at the tail of the marking pen, and the other end of the telescopic rod is fixed on the surface of the vertical rod.
Preferably, the intersecting edges of the inclined surface, the arc surface and the groove are all in arc transition.
Preferably, the wheels of the rollers are provided with rubber pads for avoiding scratches of piano keys.
Compared with the prior art, the invention has the beneficial effects that:
1. the finger force training device for piano playing is matched with the piano playing for use, the force of a practicer for pressing a key is represented by the thickness degree of a line left on the arc surface by a marking pen, the arc surface is provided with a pen point used for abutting against the marking pen, the closer the pen point is to the bottom edge of the arc surface, the larger the contact area of the arc surface and the pen point of the marking pen is, the thicker and more obvious the line trace left on the arc surface is, the larger the pressing force degree of the practicer is, the pressing force degree is judged by observing the line trace and the hearing through vision, and the problem that the practicer breaks away from the piano playing and practices the finger force to cause the problem that the piano is not obvious in finger force training effect when being re-played;
2. the sliding rod is used for positioning the marking pen leftwards or rightwards, so that the phenomenon that line marks left when the marking pen moves downwards and upwards are overlapped with each other and a user cannot clearly distinguish which line mark is the line left when the user presses a key downwards is avoided;
3. the first roller and the second roller are used for winding paper slips, and the second motor drives the second roller to rotate, so that the paper slips move along the arc surface, and a user can practice continuously for multiple times.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a right side elevational view, partially in section, of the present invention;
FIG. 3 is a schematic view of a second block of the present invention;
fig. 4 is an assembly schematic of the present invention.
Description of reference numerals:
1. the mechanical hand comprises a first block body, 11 through holes, 111 vertical rods, 112 first pressure springs, 113 retaining rings, 114 rollers, 115 second pressure springs, 116 marking pens, 12 threaded holes, 121 screws, 122 tension springs, 123 suction cups, 131 sliding rods, 132 racks, 133 gears, 134 first motors, 135 pressure sensors, 2 second block bodies, 21 inclined planes, 22 cambered surfaces, 23 grooves, 24 first rollers, 25 second rollers, 3 keys and 4 piano bodies.
Detailed Description
The following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The invention provides a finger force practice device for piano playing, comprising: the device comprises a first block body 1 and a second block body 2, wherein the first block body 1 is provided with a vertical through hole 11, a vertical rod 111 penetrates through the through hole 11, a first pressure spring 112 penetrates through the vertical rod 111, the upper end of the first pressure spring 112 is abutted against the lower surface of the first block body 1, the lower end of the first pressure spring 112 is abutted against a retaining ring 113, the retaining ring 113 is fixed on the vertical rod 111, and the lower end of the vertical rod 111 is provided with a roller 114; the upper end of the vertical rod 111 is connected with the tail part of the marking pen 116 through a second pressure spring 115, and the marking pen 116 is horizontally arranged; the bottom surface of the second block body 2 is fixedly connected with the top surface of the first block body 1, and the second block body 2 is positioned at the left side of the first block body 1; the right side of the second block body 2 is a slope 21, the lower edge of the slope 21 is close to the vertical rod 111, the slope 21 is provided with an arc surface 22 along the up-down direction thereof, the bending degree of the arc surface 22 is larger along with the continuous extension of the upper edge of the arc surface 22 to the lower edge, and the arc surface 22 is abutted to the pen point of the marking pen 116.
The first block 1 and the second block 2 are fixed to the piano body 4, the roller 114 abuts on the upper surface of the key 3, the first pressure spring 112 applies a downward force to the bottom of the upright post 111, and each time a key 3 is exercised to be depressed, the vertical rod 111 will drive the marking pen 116 to move downwards, after the key 3 is reset, the vertical rod 111 will drive the marking pen 116 to move upwards, the marking trace will be left on the arc surface 22 during the up-and-down movement of the marking pen 116, since the degree of curvature of the curved surface 22 is larger as the upper edge of the curved surface 22 continues to extend toward the lower edge, the mark left by the marker pen is thicker and more conspicuous as it goes downward, indicating that the degree of pressing force is larger when the key 3 is played, the size of the sound which is not easy to be distinguished in hearing can be judged by visually observing the thickness of the note, and the problem that the finger strength exercise effect is not obvious when the exerciser breaks away from the piano to play the exercise finger strength to cause re-playing the piano is avoided.
Preferably, as shown in fig. 1, the first block 1 is provided with a threaded hole 12, the threaded hole 12 is parallel to the through hole 11, an upper end of the threaded hole 12 is connected with a screw 121, a lower end of the screw 121 is fixedly connected with one end of a tension spring 122, and the other end of the tension spring 122 is connected with a suction cup 123.
Since the first pressure spring 112 always applies a downward force to the key 3 via the roller 114, which results in an error due to an increase in the force when the key 3 is depressed, in order to avoid the error, the above structure is designed such that the suction cup 123 is fixed to the surface of the key 3, the tension spring 122 applies an upward force to the suction cup 123, and the magnitude of the upward tension applied to the key 3 by the tension spring 122 is controlled by rotating the height of the adjustment screw 121. The upward pulling force of the suction cup applied to the key 3 and the downward pressing force of the roller 114 applied to the key 3 cancel each other out, avoiding the problem of an error caused by an increase in force when the key 3 is depressed.
Preferably, as shown in fig. 1-2, a sliding rod 131 is transversely arranged in the middle of the vertical rod 111, a rack 132 is fixedly connected along the length direction of the sliding rod 131, the rack 132 is engaged with a gear 133, the gear 133 is fixedly connected with an output shaft of a first motor 134, and the first motor 134 is arranged inside the vertical rod 111; the upper end of the sliding rod 131 is provided with a pressure sensor 135, and the pressure sensor 135 is abutted against the end part of the second pressure spring 115; the first motor 134 and the pressure sensor 135 are both electrically connected to a processor, and the processor is disposed inside the first block 1.
The single chip microcomputer is selected as a processor, line marks left when the marking pen moves downwards and upwards are mutually overlapped, so that a user cannot clearly distinguish which line mark is the line left when the marking pen presses a key downwards, and the structure is designed to avoid the problem; when the key 3 is pressed downwards, the vertical rod 111 drives the marking pen 116 to move downwards, the lower edge of the inclined surface 21 is close to the vertical rod 111, so that the marking pen 116 can move in the direction transverse to the vertical rod 111, the second pressure spring 115 transmits transverse force to the pressure sensor 135, the pressure sensor 135 detects the increase of the force and inputs a signal to the processor, the processor controls the first motor 134 to rotate forwards, the sliding rod 131 moves rightwards and abuts against the inner wall of the through hole 11, so that the vertical rod 111 deflects leftwards, the vertical rod 111 drives the marking pen 116 to deflect leftwards, and handwriting of the marking pen 116 can be left on the left side surface of the arc surface 22; similarly, the handwriting of the marker pen 116 remains on the right side surface of the cambered surface 22 during the upward rebound and resetting process of the key 3, so that the problem that two line traces are overlapped with each other is avoided.
Preferably, as shown in fig. 3, a vertical groove 23 is formed on the inclined surface 21, first rollers 24 are disposed on two side walls of the groove 23, a second roller 25 is disposed on the top of the second block 2, the second roller 25 is fixedly connected to an output shaft of a second motor, the second motor is fixed on the top of the second block 2, and the second motor is electrically connected to the processor.
In order to continuously practice the finger force process, the handwriting of the first-time pressed piano key and the second-time pressed piano key can be separated, the structure is designed, the first roller 24 is wound with a paper strip, one end of the paper strip is connected to the second roller 25, the second motor drives the second roller 25 to rotate, the paper strip is wound on the second roller 25 again, the paper strip moves on the surface of the cambered surface 22, and the handwriting is recorded on the paper strip.
Preferably, as shown in fig. 1, a telescopic rod is inserted into the second pressure spring 115, one end of the telescopic rod is fixed at the tail of the marking pen 116, and the other end of the telescopic rod is fixed on the surface of the vertical rod 111.
The purpose is to prevent the second pressure spring 115 from shaking up and down during the process of compressing and resetting the second pressure spring 115, so that the marking pen 116 shakes and handwriting is unclear.
Preferably, the intersecting edges of the inclined surface 21, the arc surface 22 and the groove 23 are all in a circular arc transition.
The paper slip can smoothly pass through the cambered surface 22, and the paper slip is prevented from being cut off by edges and corners.
Preferably, a rubber pad for preventing the piano key 3 from being scratched is provided on the wheel of the roller 114.
The invention discloses a using method of a finger force practicing device for piano playing, which comprises the following steps:
the first block body 1 and the second block body 2 of the device are fixed on a piano body 4, a roller 114 abuts against the upper surface of a key 3, a sucker 123 is fixed on the surface of the key 3, the height of an adjusting screw 121 is rotated, so that upward pulling force applied to the key 3 by the sucker and downward pressure applied to the key 3 by the roller 114 are mutually offset, a paper slip is wound on a first roller 24, one end of the paper slip is connected onto a second roller 25, a pen point of a marking pen 116 abuts against the paper slip on the surface of an arc surface 22, a processor, a second motor, a first motor 134 and a pressure sensor 135 are electrically connected, the thickness of handwriting on the paper slip is observed by pressing the piano key 3 abutted to press the roller 114 through fingers to practice finger force, and the longer the handwriting indicates that the fingers press the piano key 3; the thicker the handwriting, the greater the effort of the finger pressing on the piano, and the faster the key 3 is depressed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A finger force practice device for piano playing is characterized by comprising:
the device comprises a first block body (1), a vertical through hole (11) is formed in the first block body, a vertical rod (111) penetrates through the through hole (11), a first pressure spring (112) penetrates through the vertical rod (111), the upper end of the first pressure spring (112) is abutted to the lower surface of the first block body (1), the lower end of the first pressure spring (112) is abutted to a baffle ring (113), the baffle ring (113) is fixed on the vertical rod (111), and a roller (114) is arranged at the lower end of the vertical rod (111); the upper end of the vertical rod (111) is connected with the tail part of the marking pen (116) through a second pressure spring (115), and the marking pen (116) is horizontally arranged;
the bottom surface of the second block body (2) is fixedly connected with the top surface of the first block body (1), and the second block body (2) is positioned on the left side of the first block body (1); the right flank of second block (2) is inclined plane (21), and the lower limb of inclined plane (21) is close to montant (111), and inclined plane (21) are equipped with cambered surface (22) along its upper and lower direction, and along with the upper limb of cambered surface (22) constantly extends to the lower limb, the degree of curvature of cambered surface (22) is big more, and cambered surface (22) butt marker pen's (116) nib.
2. The finger force exercise device for piano playing of claim 1, wherein the first block body (1) is provided with a threaded hole (12), the threaded hole (12) is parallel to the through hole (11), the upper end of the threaded hole (12) is connected with a screw (121), the lower end of the screw (121) is fixedly connected with one end of a tension spring (122), and the other end of the tension spring (122) is connected with a suction cup (123).
3. The finger force exercise device for piano playing as claimed in claim 1, wherein a sliding bar (131) is transversely inserted through the middle of said vertical bar (111), a rack (132) is fixedly connected along the length direction of the sliding bar (131), the rack (132) is engaged with a gear (133), the gear (133) is fixedly connected with the output shaft of a first motor (134), and the first motor (134) is disposed inside the vertical bar (111); a pressure sensor (135) is arranged at the upper end of the sliding rod (131), and the pressure sensor (135) abuts against the end part of the second pressure spring (115); the first motor (134) and the pressure sensor (135) are both electrically connected with a processor, and the processor is arranged inside the first block body (1).
4. The device for practicing fingering for piano playing according to claim 3, wherein the inclined plane (21) is provided with a vertical groove (23), two side walls of the groove (23) are provided with first rollers (24), the top of the second block (2) is provided with a second roller (25), the second roller (25) is fixedly connected with an output shaft of a second motor, the second motor is fixed on the top of the second block (2), and the second motor is electrically connected with the processor.
5. The finger force exercise device for piano playing of claim 1, wherein a telescopic rod is inserted into the second compression spring (115), one end of the telescopic rod is fixed at the tail of the marking pen (116), and the other end of the telescopic rod is fixed on the surface of the vertical rod (111).
6. The piano playing finger force practice device as claimed in claim 1, wherein the intersecting sides of said inclined surface (21), said arc surface (22) and said groove (23) are all in the form of circular arcs.
7. The finger force practice device for piano playing of claim 1, wherein the wheel of said roller (114) is provided with a rubber pad for preventing the piano key (3) from being scratched.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110409295.8A CN113112890B (en) | 2021-04-16 | 2021-04-16 | Finger force exercise device for piano playing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110409295.8A CN113112890B (en) | 2021-04-16 | 2021-04-16 | Finger force exercise device for piano playing |
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| CN113112890A true CN113112890A (en) | 2021-07-13 |
| CN113112890B CN113112890B (en) | 2022-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110409295.8A Active CN113112890B (en) | 2021-04-16 | 2021-04-16 | Finger force exercise device for piano playing |
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| CN (1) | CN113112890B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4381691A (en) * | 1981-01-09 | 1983-05-03 | Baldwin Piano & Organ Company | Touch force adjustment means for a piano |
| US5123321A (en) * | 1987-12-01 | 1992-06-23 | Caught Anthony G | Piano |
| CN203165271U (en) * | 2013-04-05 | 2013-08-28 | 齐齐哈尔大学 | Apparatus of finger force practicing for piano playing |
| CN205194119U (en) * | 2015-11-28 | 2016-04-27 | 河南工业职业技术学院 | Novel piano indicates power exercise device |
| CN107689177A (en) * | 2017-09-30 | 2018-02-13 | 姚溪浏 | Piano finger force exerciser |
| WO2018164398A1 (en) * | 2017-03-08 | 2018-09-13 | 조순구 | Finger exercise equipment |
| CN109346029A (en) * | 2018-12-24 | 2019-02-15 | 湖南城市学院 | A kind of piano key plays dynamics adjustment device |
| CN210295867U (en) * | 2019-07-22 | 2020-04-10 | 山西大学 | Device convenient to change piano key dynamics of playing |
| CN210925035U (en) * | 2019-10-15 | 2020-07-03 | 广东省外语艺术职业学院 | Piano trainer convenient to train finger power |
| CN211403709U (en) * | 2020-03-30 | 2020-09-01 | 黑河学院 | Piano finger force exerciser |
| CN112233497A (en) * | 2020-10-23 | 2021-01-15 | 郑州幼儿师范高等专科学校 | Piano playing finger force exercise device |
| CN112634708A (en) * | 2020-12-24 | 2021-04-09 | 郑州幼儿师范高等专科学校 | Finger strength training system for piano playing |
-
2021
- 2021-04-16 CN CN202110409295.8A patent/CN113112890B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4381691A (en) * | 1981-01-09 | 1983-05-03 | Baldwin Piano & Organ Company | Touch force adjustment means for a piano |
| US5123321A (en) * | 1987-12-01 | 1992-06-23 | Caught Anthony G | Piano |
| CN203165271U (en) * | 2013-04-05 | 2013-08-28 | 齐齐哈尔大学 | Apparatus of finger force practicing for piano playing |
| CN205194119U (en) * | 2015-11-28 | 2016-04-27 | 河南工业职业技术学院 | Novel piano indicates power exercise device |
| WO2018164398A1 (en) * | 2017-03-08 | 2018-09-13 | 조순구 | Finger exercise equipment |
| CN107689177A (en) * | 2017-09-30 | 2018-02-13 | 姚溪浏 | Piano finger force exerciser |
| CN109346029A (en) * | 2018-12-24 | 2019-02-15 | 湖南城市学院 | A kind of piano key plays dynamics adjustment device |
| CN210295867U (en) * | 2019-07-22 | 2020-04-10 | 山西大学 | Device convenient to change piano key dynamics of playing |
| CN210925035U (en) * | 2019-10-15 | 2020-07-03 | 广东省外语艺术职业学院 | Piano trainer convenient to train finger power |
| CN211403709U (en) * | 2020-03-30 | 2020-09-01 | 黑河学院 | Piano finger force exerciser |
| CN112233497A (en) * | 2020-10-23 | 2021-01-15 | 郑州幼儿师范高等专科学校 | Piano playing finger force exercise device |
| CN112634708A (en) * | 2020-12-24 | 2021-04-09 | 郑州幼儿师范高等专科学校 | Finger strength training system for piano playing |
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| CN113112890B (en) | 2022-06-07 |
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