CN109360538B - Piano keyboard cover plate descent control device - Google Patents
Piano keyboard cover plate descent control device Download PDFInfo
- Publication number
- CN109360538B CN109360538B CN201811500861.0A CN201811500861A CN109360538B CN 109360538 B CN109360538 B CN 109360538B CN 201811500861 A CN201811500861 A CN 201811500861A CN 109360538 B CN109360538 B CN 109360538B
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- Prior art keywords
- descent control
- descent
- control device
- air cylinder
- control rod
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- 238000007789 sealing Methods 0.000 claims abstract description 29
- 230000001105 regulatory effect Effects 0.000 claims 1
- 230000006378 damage Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
- G10C3/00—Details or accessories
- G10C3/16—Actions
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10C—PIANOS, HARPSICHORDS, SPINETS OR SIMILAR STRINGED MUSICAL INSTRUMENTS WITH ONE OR MORE KEYBOARDS
- G10C3/00—Details or accessories
- G10C3/16—Actions
- G10C3/20—Actions involving the use of hydraulic, pneumatic or electromagnetic means
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Electromagnetism (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention discloses a piano keyboard cover plate descent control device, which comprises: a slow down gas cylinder having a hollow interior, the slow down gas cylinder being open at an upper portion thereof and formed with an opening; a sealing cover connected to an upper portion of the slow down gas cylinder for sealing the opening; the bottom end of the descent control rod penetrates through the sealing cover and then goes deep into the descent control air cylinder, wherein a descent control air valve is arranged at the side of the descent control air cylinder, and the descent control air valve is communicated with the bottom of the descent control air cylinder. According to the invention, the volume of the descent control device is greatly reduced by the mode of matching the air pressure valve with the spring, and the descent control device is free from oil pollution and other phenomena, and is hidden under the hinged position of the piano keyboard cover plate and the piano, so that the attractiveness and the practicability are greatly improved.
Description
Technical Field
The invention relates to the field of pianos, in particular to a piano keyboard cover plate descent control device.
Background
Because the apron of piano is bulky and generally heavier, the piano apron falls down and receive the time very easily to take place to descend too fast user's finger clamp injury or key damage that leads to, this problem is especially outstanding for the beginner. At present, the keyboard apron slowly falls the device on the market and adopts hydraulic pressure slowly to fall the ware, and hydraulic pressure slowly falls the general volume great, and the problem of oozing oil takes place easily in the use, exposes outside first and influences whole pleasing to the eye, and second oozes fluid and causes the pollution to other spare parts on the piano easily. In view of the foregoing, there is a need for a piano keyboard cover descent control device to solve the above problems.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the descent control device for the piano keyboard cover plate, which greatly reduces the volume of the descent control device by a mode of matching an air pressure valve with a spring, does not have the phenomena of oil pollution and the like, is hidden under the hinging position of the piano keyboard cover plate and a piano, and greatly improves the attractiveness and the practicability.
To achieve the above objects and other advantages and in accordance with the purpose of the invention, there is provided a piano keyboard cover descent control device comprising:
A slow down gas cylinder having a hollow interior, the slow down gas cylinder being open at an upper portion thereof and formed with an opening;
a sealing cover connected to an upper portion of the slow down gas cylinder for sealing the opening;
The bottom end of the descent control rod penetrates through the sealing cover and then goes deep into the descent control air cylinder,
Wherein, the side of slowly falling gas cylinder is equipped with slowly falling gas valve, and this slowly falling gas valve is linked together with slowly falling gas cylinder's bottom.
Preferably, the top of the descent control rod is fixedly connected with a touch end, the radius of the touch end is larger than that of the descent control rod, the bottom of the descent control rod is fixedly connected with a piston, and the periphery of the piston is continuously contacted with the inner side wall of the descent control air cylinder to form a seal.
Preferably, the outer side wall of the slow gas-reducing cylinder is provided with an adjusting screw thread, and the slow gas-reducing cylinder is sleeved with an adjusting disk which is in screw connection with the adjusting screw thread.
Preferably, a return spring is arranged between the touch end and the adjusting plate, the return spring is sleeved on the descent control rod and the descent control air cylinder, and the upper end and the lower end of the return spring are limited by the touch end and the adjusting plate respectively.
Preferably, the lower surface of the touching end is integrally formed with a first shaft sleeve and a second shaft sleeve which are concentrically arranged from top to bottom, and the radius of the second shaft sleeve is smaller than that of the first shaft sleeve, so that a bench stage is formed at the joint of the second shaft sleeve and the first shaft sleeve.
Preferably, a screwing nut screwed on the descent control rod is arranged right below the second sleeve, a limiting disc matched with the descent control rod is sleeved on the stage, and the screwing nut screws and fixes the limiting disc with the step section.
Preferably, the return spring is arranged between the limit disc and the adjusting disc, so that the top of the return spring is in continuous contact with the lower surface of the limit disc.
Preferably, the sealing cover comprises a horizontal section and a vertical section, the horizontal section and the vertical section are integrally combined to enable the sealing cover to be in a T-shaped structure, the vertical section extends from the opening to the inside of the descent control air cylinder, the horizontal section covers the top of the opening to seal the opening, and the periphery of the vertical section is in elastic contact with the inner side wall of the descent control air cylinder to form a seal.
Preferably, a shoulder is formed at the joint of the horizontal section and the vertical section, and a first sealing ring is sleeved on the shoulder and positioned between the vertical section and the inner side wall of the slow-descent air cylinder.
Preferably, a clamping sealing ring sleeved on the descent control rod is arranged between the horizontal section and the descent control rod, and a second sealing ring sleeved on at least the descent control rod is arranged between the vertical section and the descent control rod.
Compared with the prior art, the invention has the beneficial effects that: the buffer descending device is hidden under the hinged position of the piano keyboard cover plate and the piano, so that the attractiveness and the practicability are greatly improved.
Drawings
Fig. 1 is a front view of a piano keyboard cover plate descent control device according to the present invention;
Fig. 2 is a longitudinal sectional view of the piano keyboard cover plate descent control device according to the present invention.
Detailed Description
The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses a device for practicing the invention. In the drawings, the shape and size may be exaggerated for clarity, and the same reference numerals will be used throughout the drawings to designate the same or similar components. In the following description, terms such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are based on the orientation or positional relationship shown in the drawings. In particular, "height" corresponds to the top-to-bottom dimension, "width" corresponds to the left-to-right dimension, and "depth" corresponds to the front-to-back dimension. These relative terms are for convenience of description and are not generally intended to require a particular orientation. Terms (e.g., "connected" and "attached") referring to an attachment, coupling, etc., refer to a relationship wherein these structures are directly or indirectly secured or attached to one another through intervening structures, as well as both movable or rigid attachments or relationships, unless expressly described otherwise.
Referring to fig. 1 and 2, a piano keyboard cover descent control device 1 includes:
a descent control device 11 having a hollow interior, the descent control device 11 being open at an upper portion thereof and formed with an opening;
a sealing cover 136, the sealing cover 136 being connected to an upper portion of the slow down gas cylinder 11 to seal the opening;
A descent control rod 13, the bottom end of the descent control rod 13 penetrating through the sealing cover 136 and then penetrating into the descent control cylinder 11,
Wherein, the side of the slow down gas cylinder 11 is provided with a slow down gas valve 12, and the slow down gas valve 12 is communicated with the bottom of the slow down gas cylinder 11. Further, the upper and lower ends of the slow descent air valve 12 are respectively provided with a one-way air inlet valve 121 and a one-way air outlet valve 122. In the preferred embodiment, the top of the slow descent air valve 12 is provided with a one-way air outlet valve 122 in a communicating manner, the bottom of the slow descent air valve 12 is provided with a one-way air inlet valve 121 in a communicating manner, and the bottom of the slow descent air valve 12 is communicated with the bottom of the slow descent air cylinder 11 through an air passage 123.
Referring to fig. 1, a touching end 131 is fixedly connected to the top of the descent control rod 13, the radius of the touching end 131 is larger than that of the descent control rod 13, a piston 135 is fixedly connected to the bottom of the descent control rod 13, and the outer periphery of the piston 135 is continuously contacted with the inner side wall of the descent control cylinder 11 to form a seal. In a preferred embodiment, the bottom of the descent control device 11 is provided with a connection hole 111 for connection to the piano body.
Further, an adjusting screw thread 112 is provided on the outer side wall of the slow gas cylinder 11, and an adjusting disk 142 screwed with the adjusting screw thread 112 is sleeved on the slow gas cylinder 11.
Further, a return spring 14 is disposed between the touching end 131 and the adjusting plate 142, the return spring 14 is sleeved on the descent control rod 13 and the descent control device 11, and the upper and lower ends of the return spring 14 are respectively limited by the touching end 131 and the adjusting plate 142. When the piano keyboard cover plate is used, the distance between the rotary adjusting disc 142 and the touch end 131 can be adjusted through the rotary adjusting disc 142, namely, the compression stroke of the return spring 14 is adjusted, so that the return force of the return spring 14 can be adaptively adjusted according to the weight of the piano keyboard cover plate, and the descent control effect of the descent control device 1 can be optimized.
Referring to fig. 2, a first sleeve 132 and a second sleeve 133 concentrically disposed from top to bottom are integrally formed on a lower surface of the touching end 131, and a radius of the second sleeve 133 is smaller than that of the first sleeve 132, so that a junction of the second sleeve 133 and the first sleeve 132 is formed with a stage.
Further, a screwing nut 143 screwed on the descent control rod 13 is arranged right below the second shaft sleeve 133, a limit disc 141 matched with the descent control rod is sleeved on the stage, and the screwing nut 143 screws and fixes the limit disc 141 and the step section. The stage can improve the stability of the assembly of the limit plate 141 and the descent control device 13.
In a preferred embodiment, the return spring 14 is disposed between the limit plate 141 and the adjustment plate 142 such that the top of the return spring 14 is in continuous contact with the lower surface of the limit plate 141.
Further, the sealing cover 136 includes a horizontal section and a vertical section integrally combined such that the sealing cover 136 is in a T-shaped structure, and the vertical section extends from the opening into the interior of the slow-descent gas cylinder 11, wherein the horizontal section covers the top of the opening to seal the opening, and the outer periphery of the vertical section is elastically contacted with the inner side wall of the slow-descent gas cylinder 11 to form a seal.
Further, a shoulder is formed at the connection between the horizontal section and the vertical section, and a first sealing ring 137 is sleeved on the shoulder and located between the vertical section and the inner side wall of the slow gas cylinder 11. With this structure, the sealing property of the seal cover 136 to the gas cylinder 11 can be improved.
Further, a clamping sealing ring 139 sleeved on the descent control rod 13 is arranged between the horizontal segment and the descent control rod 13, and a second sealing ring 138 sleeved on at least the descent control rod 13 is arranged between the vertical segment and the descent control rod 13. In a preferred embodiment, the bottom end of the descent control rod 13 is detachably connected with a fixing nut 134, and the purpose of assembling and disassembling the piston 135 can be achieved by screwing or unscrewing the fixing nut 134, so that the convenience of replacing the piston 135 is achieved.
Working principle:
fig. 1 and2 show a state diagram of the buffer 1 not pressed by the piano keyboard cover plate, in which the restoring spring 14 is stretched to the maximum length in the limited range and still in the pressed state, which causes the descent control rod 13 to be supported to the maximum stroke by the restoring spring 14, at this time, the interior of the descent control air cylinder 11 is filled with air sucked through the unidirectional air inlet valve 121, when the piano keyboard cover plate descends and receives the downward pressing force of the piano keyboard cover plate, the piston 135 slowly extrudes the air in the descent control air cylinder 11 through the unidirectional air outlet valve 122, and under the cooperation of the restoring spring, the impact force released by the piano keyboard cover plate is buffered; when the piano keyboard cover plate is lifted and unfolded, the pressing force pressed on the touching end 131 is gradually reduced, so that the touching end 131 is gradually lifted under the restoring force of the restoring spring 14, and the piston 135 is lifted along with the restoring force of the descent control rod 13, and air continuously enters the descent control air cylinder 11 through the one-way air inlet valve 121 under the suction of the descent control air cylinder 11 until the air pressure in the descent control air cylinder 11 is communicated with the outside, and at this time, the buffer 1 is restored to the state shown in fig. 1 and 2.
The number of equipment and the scale of processing described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be readily apparent to those skilled in the art.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (6)
1. A piano keyboard cover descent control device (1), characterized by comprising:
A descent control device (11) having a hollow interior, the descent control device (11) being open at an upper portion thereof and being formed with an opening;
a sealing cover (136), the sealing cover (136) is connected to the upper part of the descent control device (11) for sealing the opening;
The bottom end of the descent control rod (13) penetrates through the sealing cover (136) and then goes deep into the descent control air cylinder (11), wherein a descent control air valve (12) is arranged at the side of the descent control air cylinder (11), and the descent control air valve (12) is communicated with the bottom of the descent control air cylinder (11);
The top of the descent control rod (13) is fixedly connected with a touch end (131), the radius of the touch end (131) is larger than that of the descent control rod (13), the bottom of the descent control rod (13) is fixedly connected with a piston (135), and the periphery of the piston (135) is continuously contacted with the inner side wall of the descent control air cylinder (11) to form a seal;
An adjusting screw thread (112) is arranged on the outer side wall of the slow descent air cylinder (11), and an adjusting disc (142) which is in screw connection with the adjusting screw thread (112) is sleeved on the slow descent air cylinder (11);
A return spring (14) is arranged between the touch end (131) and the adjusting disc (142), the return spring (14) is sleeved on the slow descent rod (13) and the slow descent air cylinder (11), and the upper end and the lower end of the return spring (14) are respectively limited by the touch end (131) and the adjusting disc (142);
the sealing cover (136) comprises a horizontal section and a vertical section, the horizontal section and the vertical section are integrally combined to enable the sealing cover (136) to be of a T-shaped structure, the vertical section extends from the opening deep into the slow-descent air cylinder (11), the horizontal section covers the top of the opening to seal the opening, and the periphery of the vertical section is in elastic contact with the inner side wall of the slow-descent air cylinder (11) to form a seal.
2. The piano keyboard cover descent control device (1) according to claim 1, wherein the lower surface of the touch end (131) is integrally formed with a first boss (132) and a second boss (133) concentrically disposed from top to bottom, and the radius of the second boss (133) is smaller than that of the first boss (132), so that a junction of the second boss (133) and the first boss (132) is formed with a stage.
3. The piano keyboard cover board descent control device (1) according to claim 2, characterized in that a screwing nut (143) screwed on the descent control rod (13) is arranged under the second sleeve (133), a limit disc (141) matched with the screwing nut is sleeved on the stage, and the screwing nut (143) screws and fixes the limit disc (141) and the step section.
4. A piano keyboard cover descent control device (1) according to claim 3, wherein the return spring (14) is provided between the limit plate (141) and the regulating plate (142) such that the top of the return spring (14) is in continuous contact with the lower surface of the limit plate (141).
5. The piano keyboard cover descent control device (1) according to claim 1, wherein a shoulder is formed at the junction of the horizontal section and the vertical section, said shoulder being sleeved with a first sealing ring (137) located between the vertical section and the inner side wall of the descent control cylinder (11).
6. The piano keyboard cover board descent control device (1) according to claim 5, wherein a clamping sealing ring (139) sleeved on the descent control rod (13) is arranged between the horizontal section and the descent control rod (13), and a second sealing ring (138) sleeved on at least the descent control rod (13) is arranged between the vertical section and the descent control rod (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811500861.0A CN109360538B (en) | 2018-12-10 | 2018-12-10 | Piano keyboard cover plate descent control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811500861.0A CN109360538B (en) | 2018-12-10 | 2018-12-10 | Piano keyboard cover plate descent control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109360538A CN109360538A (en) | 2019-02-19 |
| CN109360538B true CN109360538B (en) | 2024-05-07 |
Family
ID=65330155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811500861.0A Active CN109360538B (en) | 2018-12-10 | 2018-12-10 | Piano keyboard cover plate descent control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109360538B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08115075A (en) * | 1994-10-13 | 1996-05-07 | Kawai Musical Instr Mfg Co Ltd | Buffer mechanism of keyboard lid |
| EP1246161A1 (en) * | 2001-03-30 | 2002-10-02 | Yamaha Corporation | Keyboard instrument |
| CN201117220Y (en) * | 2007-04-10 | 2008-09-17 | 康米塔 | Piano keyboard cap buffer |
| WO2009091742A1 (en) * | 2008-01-15 | 2009-07-23 | Geoghegan Daniel E | Support for a piano lid |
| CN204493571U (en) * | 2015-04-03 | 2015-07-22 | 福建省晋江市东石耐特克机械有限公司 | A kind of anti-collision rear shock absorber |
| CN204592122U (en) * | 2015-04-16 | 2015-08-26 | 刘海坤 | Gas recovery formula vibration damper |
| CN205722749U (en) * | 2016-04-13 | 2016-11-23 | 闫雨 | A kind of fingerboard slow descending device |
| CN209357447U (en) * | 2018-12-10 | 2019-09-06 | 吴怡 | A kind of damping unit for fingerboard cover board |
-
2018
- 2018-12-10 CN CN201811500861.0A patent/CN109360538B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08115075A (en) * | 1994-10-13 | 1996-05-07 | Kawai Musical Instr Mfg Co Ltd | Buffer mechanism of keyboard lid |
| EP1246161A1 (en) * | 2001-03-30 | 2002-10-02 | Yamaha Corporation | Keyboard instrument |
| CN201117220Y (en) * | 2007-04-10 | 2008-09-17 | 康米塔 | Piano keyboard cap buffer |
| WO2009091742A1 (en) * | 2008-01-15 | 2009-07-23 | Geoghegan Daniel E | Support for a piano lid |
| CN204493571U (en) * | 2015-04-03 | 2015-07-22 | 福建省晋江市东石耐特克机械有限公司 | A kind of anti-collision rear shock absorber |
| CN204592122U (en) * | 2015-04-16 | 2015-08-26 | 刘海坤 | Gas recovery formula vibration damper |
| CN205722749U (en) * | 2016-04-13 | 2016-11-23 | 闫雨 | A kind of fingerboard slow descending device |
| CN209357447U (en) * | 2018-12-10 | 2019-09-06 | 吴怡 | A kind of damping unit for fingerboard cover board |
Non-Patent Citations (1)
| Title |
|---|
| 钢琴的美观与安全探讨;梁剑非;;现代商贸工业;20100901(17);第364页 * |
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| Publication number | Publication date |
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| CN109360538A (en) | 2019-02-19 |
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