CN104616637A - Buffering device - Google Patents
Buffering device Download PDFInfo
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- CN104616637A CN104616637A CN201410582238.XA CN201410582238A CN104616637A CN 104616637 A CN104616637 A CN 104616637A CN 201410582238 A CN201410582238 A CN 201410582238A CN 104616637 A CN104616637 A CN 104616637A
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- keyboard
- arm
- disc spring
- cover
- snubber assembly
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Abstract
The invention discloses a buffering device, and the buffering device is disposed on a keyboard musical instrument. The keyboard musical instrument is provided with a main body and a keyboard cover which can rotate relative to the main body. The buffering device can achieve the miniaturization of the keyboard musical instrument, and can be designed easily. The buffering device (10) is provided with an arm part (12), and a base end part (31) is supported to rotate freely relative to the main body of the keyboard musical instrument. A front end part (32) abuts against the back of the keyboard cover. The buffering device (10) is also provided with a rotating damper (13) which applies a braking force to the arm part (12) for rotation and movement; a coil spring (14) which applies a force to the arm part (12) along a first rotation direction, so as to enable the arm part (12) to be pressed towards the keyboard cover.
Description
Technical field
The present invention relates to a kind of snubber assembly.
Background technology
As a rule, the keyboard instrument such as the acoustic piano such as grand piano, upright piano, pianotron has the cover of keyboard in overlay keyboard portion.Cover of keyboard is installed to be and swings freely relative to the main body of keyboard instrument, can opening and closing between the position and the position making keypad portion expose in overlay keyboard portion.
Due to the heavier-weight of this cover of keyboard, such as patent documentation 1 at present, shown in 2, adopts the snubber assembly with rotary damper, and this rotary damper applies damping force to the power that cover of keyboard is closed because of deadweight.Thus, prevent cover of keyboard from closing suddenly because of deadweight.In addition, in existing snubber assembly, as force application part, existing snubber assembly is provided with volute spring, thus when opening cover of keyboard, rotary damper is exerted a force to make it return to origin-location.
Patent documentation 1:(Japan) patent No. 3470059 publication
Patent documentation 2:(Japan) JP 2007-132509 publication
But, in above-mentioned existing snubber assembly, almost only utilize the damping force of rotary damper to brake to the in rotary moving of closing direction cover of keyboard.In this case, there is rotary damper and become large-scale and the problem being difficult to make snubber assembly miniaturization.
At this, also consider and helical spring acting force is also used for braking to the in rotary moving of closing direction cover of keyboard.But in volute spring, owing to increasing along with its displacement, acting force increases, and helical spring acting force can not be braked with constant power to the in rotary moving of closing direction cover of keyboard.Therefore, there is the troublesome problem of snubber assembly that design is suitable for the braking of cover of keyboard.
In addition, in order to obtain the larger volute spring of acting force, need helical spring axial length elongation etc., thus volute spring is formed larger, therefore also there is the problem hindering snubber assembly miniaturization.
Summary of the invention
The present invention proposes in view of the foregoing, its object is to provide a kind of and easily can realize miniaturization and the snubber assembly of easily design.
In order to solve above-mentioned problem, snubber assembly of the present invention is arranged at keyboard instrument, described keyboard instrument has main body and the cover of keyboard being mounted to can swing relative to this main body, the feature of described snubber assembly is, have: arm, its base end part is supported to and can rotates relative to described main body, and its leading section abuts with the back side of described cover of keyboard; Rotary damper, it is to the applying damping force in rotary moving of described arm; Disc spring, it exerts a force along the first sense of rotation to described arm, to make described arm to the direction pressing of opening described cover of keyboard.
In snubber assembly of the present invention, when making cover of keyboard in rotary moving along closing direction from open position, arm and rotary damper are from the initial position corresponding with the open position of cover of keyboard to the position of rotation swing offset corresponding with the make-position of cover of keyboard.In addition, windup-degree (torsional capacity) the also displacement of disc spring.Thus, the damping force of rotary damper and the acting force of disc spring put on the in rotary moving of cover of keyboard via arm, thus slowly can close cover of keyboard.
On the other hand, when making cover of keyboard from make-position along the in rotary moving until open position of opening direction, arm and rotary damper utilize the acting force of disc spring to return to initial position from above-mentioned position of rotation.In addition, the windup-degree of disc spring also turns back to original state.
Further, utilize snubber assembly of the present invention, as the force application part making arm and rotary damper return to initial position, adopt disc spring, even if therefore formed larger unlike existing volute spring, also can easily obtain larger acting force.
In addition, in disc spring, because can easily its spring constant is set as less, so the displacement of windup-degree relative to disc spring, the change of the acting force of disc spring can be suppressed for less.That is, make cover of keyboard from open position in rotary moving to make-position time, the acting force of the disc spring in rotary moving putting on cover of keyboard can be suppressed to change.Therefore, even if the acting force both sides of the damping force of rotary damper and disc spring are used for the braking of cover of keyboard to closing direction, the snubber assembly of the braking being suitable for cover of keyboard can also easily be designed.
And, disc spring is in a ratio of small-sized with the existing volute spring with equal performance, in addition, does the braking of cover of keyboard to closing direction by being applied flexibly by the acting force of disc spring, the miniaturization of rotary damper can be realized, therefore, it is possible to easily realize the miniaturization of snubber assembly.
Further, in described snubber assembly, described disc spring also can be made to be wrapped on the rotating part of described rotary damper.
Utilize said structure, the structural portion number of packages of snubber assembly can be reduced, thus realize the miniaturization of snubber assembly further.
In addition, in described snubber assembly, also can have the gear mechanism linking described arm and described disc spring.In addition, the function that the variable quantity that described gear mechanism also can be made to have the anglec of rotation making the variable quantity of the windup-degree of described disc spring relative to described arm increases.
In said structure, utilize gear mechanism, relative to the anglec of rotation of arm, the displacement of the windup-degree of disc spring is increased, therefore, it is possible to reduce the actual spring constant of disc spring further.Therefore, it is possible to more easily design is suitable for the snubber assembly of the braking of cover of keyboard.
In addition, also described gear mechanism can be made to have the first gear and the second gear, the described base end part synchronous rotary of described first gear and described arm, the free end synchronous rotary of the length direction of described second gear and described disc spring, with described first gears meshing; The radial dimension of described second gear is less than the radial dimension of described first gear.The actual spring constant of disc spring can be reduced.
Invention effect
According to the present invention, adopting disc spring as making arm and rotary damper return to the mechanism of origin-location, easily can design the snubber assembly of the braking of applicable cover of keyboard, and the miniaturization of snubber assembly can be realized.
Accompanying drawing explanation
Fig. 1 is the sectional side view of the major part of the piano representing the snubber assembly being provided with first embodiment of the invention.
Fig. 2 is the stereographic map of the snubber assembly representing first embodiment of the invention.
Fig. 3 is the exploded perspective view of the snubber assembly of Fig. 2.
Fig. 4 represents at Fig. 2, in the snubber assembly of 3, and the cut-open view of the configuration of the base end part of pair of bearings portion, arm, rotary damper and disc spring.
Fig. 5 is the stereographic map of the snubber assembly representing second embodiment of the invention.
Fig. 6 represents in the snubber assembly of Fig. 5, and the cut-open view of the installment state that the installment state of installing to base station and rotary damper are installed to the base end part of arm installed by disc spring.
Fig. 7 is the cut-open view of the gear mechanism of the snubber assembly representing Fig. 5.
Description of reference numerals
1 piano (keyboard instrument); 2 main bodys; 3 cover of keyboards; 10,100 snubber assemblys; 11,111 base stations; 12 arms; 13 rotary dampers; 14 disc springs; 35 shells; 36 rotating parts; 115 gear mechanisms; 141 first gears; 142 second gears; CL covering position (make-position); OP open position (open position); OD opening direction; IP initial position; RP position of rotation; R1 first sense of rotation; R2 second sense of rotation
Embodiment
(the first embodiment)
Below, with reference to Fig. 1 ~ 4, first embodiment of the present invention is described.
As shown in Figure 1, the snubber assembly 10 of this embodiment is arranged at piano (keyboard instrument) 1.The piano 1 of present embodiment is the upright piano as a kind of acoustic piano, the cover of keyboard 3 having main body 2 and rotatably link with main body 2.
Main body 2 has framework 4 and is arranged on the keypad portion 5 of front-surface side of framework 4.In addition, main body 2 also has the existing hammer, string, movable device (all not shown) etc. that are arranged on framework 4 inside.
Cover of keyboard 3 overlay keyboard portion 5, and be installed to be and swing freely relative to main body 2 centered by rotation L1 between covering position (make-position) CL and open position (open position) OP making keypad portion 5 externally expose in overlay keyboard portion 5.
Snubber assembly 10 is arranged between the key side rail 6 of cover of keyboard 3 and framework 4, and this key side rail 6 is covered by cover of keyboard 3 together with keypad portion 5, and as shown in figs. 2 to 4, snubber assembly 10 has base station 11, arm 12, rotary damper 13, disc spring 14.
Base station 11 is fixed on (with reference to Fig. 1) on key side rail 6, and base station 11 has baseplate part 21 and pair of bearings portion 22,22.
Baseplate part 21 utilizes bonding, screw thread fixing etc. fixing (with reference to Fig. 1) at the upper surface of the key side rail 6 relative with the cover of keyboard 3 being configured at covering position CL.The base end part 31 of aftermentioned arm 12 is rotatably supported in pair of bearings portion 22,22, is fixed on baseplate part 21.In illustrated example, each bearing portion 22 utilizes screw 23 to be fixed on baseplate part 21, such as bonding agent etc. also can be utilized to fix, also can such as form with baseplate part 21.
Arm 12 is formed as bar-shaped.One end (base end part 31) of the length direction of arm 12 utilizes pair of bearings portion 22 rotatably to be supported.The base end part 31 of arm 12 is formed as tubular.The other end (leading section 32) of arm 12 is the part abutted with the back side of cover of keyboard 3 (with keypad portion 5, face that key side rail 6 is relative under the state being configured at covering position CL).The leading section 32 of arm 12 is rotatably provided with roller 33, and this roller 33 abuts with the back side of cover of keyboard 3.
Rotary damper 13 has the housing 35 of inclosure wet goods and is installed to be the rotating part 36 rotatable relative to shell 35.Shell 35 has columned outward appearance.Rotating part 36 is given prominence to from an end of the axis direction of shell 35.This rotary damper 13 is accommodated in the base end part 31 of arm 12.Under the state that rotary damper 13 is accommodated in base end part 31, base end part 31 is consistent with each other with the axis of rotary damper 13.
In addition, under this receiving state, the base end part 31 of arm 12 is limited with the relative rotation of shell 35.In the present embodiment, the outer peripheral face of shell 35 is formed as forming the concavo-convex face that rises and falls in the circumferential as splined shaft, and the inner peripheral surface of base end part 31 is formed as the male and fomale(M&F) corresponding with the outer peripheral face of shell 35, thus the relative rotation of restriction base end part 31 and shell 35.It should be noted that, also can limit above-mentioned relative rotation by the base end part 31 shell 35 being fixed on such as arm 12.
On the other hand, rotating part 36 is fixed on the bearing portion 22 of base station 11.In the present embodiment, be formed with key 37 in the leading section of the projected direction of rotating part 36, the bearing portion 22A of the side of base station 11 is formed the keyway 24 that the key 37 for rotating part 36 inserts.Thus, rotating part 36 is fixed to and can not rotates relative to base station 11.
Disc spring 14 exerts a force (with reference to Fig. 1) along the first sense of rotation R1 to arm 12, presses (Fig. 1 reference) to make arm 12 to the direction OD opening cover of keyboard 3.Disc spring 14 is wound in spiral fashion by the elastic body such as metal being formed as tabular and forms, and has cylindric outward appearance.The one end being positioned at the length direction of the disc spring 14 of inner circumferential side is fixed on the rotating part 36 of rotary damper 13.That is, the disc spring 14 of present embodiment is wrapped on rotating part 36.In this condition, the axis of rotary damper 13 and disc spring 14 is consistent with each other.
In addition, the disc spring 14 of present embodiment is accommodated in the base end part 31 of arm 12 together with rotary damper 13.Further, the other end being positioned at the disc spring 14 of outer circumferential side is fixed on the base end part 31 of arm 12.
In the snubber assembly 10 of the present embodiment of the above structure, the axis of the base end part 31 of arm 12, rotary damper 13 and disc spring 14 is consistent with each other.In Fig. 1 ~ 4, the axis of these rotary dampers 13 and disc spring 14 uses symbol L2 to represent.
By base station 11 to be fixed on towards the mode at the back side of cover of keyboard 3 upper surface of key side rail 6 with the first sense of rotation R1 side of arm 12, the snubber assembly 10 of present embodiment is arranged on piano 1.
Next, the action of the snubber assembly 10 of present embodiment is described.
Make cover of keyboard 3 from open position OP along closing direction CD in rotary moving to covering position CL time, the shell 35 of arm 12 and rotary damper 13 relative to rotating part 36 from the initial position IP corresponding with the open position OP of cover of keyboard 3 along the second sense of rotation R2 swing offset to the position of rotation RP corresponding with the covering position CL of cover of keyboard 3.In addition, now, windup-degree (torsional capacity) the also displacement of disc spring 14, makes disc spring 14 exert a force along the first sense of rotation R1 to arm 12.Thus, the damping force of rotary damper 13 and the acting force of disc spring 14 put on the in rotary moving of cover of keyboard 3 via arm 12, thus slowly can close cover of keyboard 3.
On the other hand, when making cover of keyboard 3 in rotary moving along opening direction OD from covering position CL to open position OP, the shell 35 of arm 12 and rotary damper 13 utilizes the acting force of disc spring 14 to return to initial position IP from above-mentioned position of rotation RP.In addition, the windup-degree of disc spring 14 also turns back to original state.
It should be noted that, in the piano 1 of present embodiment, as shown in Figure 1, the open position OP of cover of keyboard 3 is set as relative to covering position CL in the angle (such as 130 degree) larger than 90 degree.In addition, under the state that cover of keyboard 3 is configured in open position OP, cover of keyboard 3 separates with the arm 12 being positioned at initial position IP.
Further, cover of keyboard 3, being rotatably moved to the stage of the position (abutted position TO) making cover of keyboard 3 obtain because its deadweight is in rotary moving to closing direction CD from open position OP to closing direction CD, abuts with the arm 12 being configured at initial position IP.The abutted position TO of cover of keyboard 3 such as can be set as that cover of keyboard 3 is more than 45 degree less than 90 degree relative to the unlimited angle θ of covering position CL.
As described above, utilize the snubber assembly 10 of present embodiment, when closed cover of keyboard 3, the damping force of rotary damper 13 and the acting force of disc spring 14 are applied on cover of keyboard 3, therefore, it is possible to prevent cover of keyboard 3 from closing suddenly.
In addition, utilize the snubber assembly 10 of present embodiment, because adopt disc spring 14 as the force application part making arm 12 and rotary damper 13 return to initial position IP, therefore, even if be formed as comparatively large unlike existing volute spring, also can easily obtain larger acting force.
Further, in disc spring 14, because can easily its spring constant is set as less, so relative to the displacement of the windup-degree of disc spring 14, the change of the acting force of disc spring 14 can be suppressed for less.That is, make cover of keyboard 3 from open position OP in rotary moving to covering position CL time, the acting force of the disc spring 14 in rotary moving putting on cover of keyboard 3 can be suppressed to change.Therefore, even if the acting force both sides of the damping force of rotary damper 13 and disc spring 14 are for the braking of cover of keyboard 3 to closing direction CD, the snubber assembly 10 of the braking of applicable cover of keyboard 3 can also easily be designed.
And, disc spring 14 is in a ratio of small-sized with the existing volute spring with equal performance, in addition, does the braking of cover of keyboard 3 to closing direction CD by making the acting force of disc spring 14 apply flexibly, the miniaturization of rotary damper 13 can be realized, therefore, it is possible to easily realize the miniaturization of snubber assembly 10.
Particularly, in the present embodiment, because disc spring 14 is wrapped on the rotating part 36 of rotary damper 13, therefore, it is possible to reduce the structural portion number of packages of snubber assembly 10, thus the miniaturization of snubber assembly 10 can be realized further.
It should be noted that, in the snubber assembly 10 of above-mentioned first embodiment, the position of arm 12 in from open position OP towards the way of covering position CL abuts with cover of keyboard 3, but also can such as with the position of cover of keyboard 3 independently, abut with cover of keyboard 3 always.
(the second embodiment)
Next, with reference to Fig. 5 ~ 7, second embodiment of the present invention is described.
In this embodiment, compared with the snubber assembly 10 of the first embodiment, only a part of structure is different, and other structures are identical with the first embodiment.In the present embodiment, the structure member identical with the first embodiment marks prosign etc., and the description thereof will be omitted.
As shown in Fig. 5 ~ 7, the snubber assembly 100 of this embodiment, in the same manner as the snubber assembly 10 of the first embodiment, has base station 111, arm 12, rotary damper 13 and disc spring 14.
But in the snubber assembly 100 of present embodiment, arm 12 and rotary damper 13 are configured on same axis (first axle L3), disc spring 14 is configured on the second axis L4 of arranging separately with first axle L3.These two axis L3, L4 is parallel to each other.In addition, the snubber assembly 100 of present embodiment has the gear mechanism 115 linking arm 12 and disc spring 14, and to make the anglec of rotation relative to arm 12, the displacement of the windup-degree of disc spring 14 increases.Below illustrate the snubber assembly 100 of present embodiment.
Base station 111 is fixed on the key side rail 6 (with reference to Fig. 1) of piano 1 in the same manner as the first embodiment, and has the difference rotatably supporting base end part 31 of arm 12 and the pair of bearings portion 122,122 of aftermentioned connecting member 116.The base end part 31 of arm 12 utilizes pair of bearings portion 122,122 to rotate centered by first axle L3 and is supported comfortablely.
Rotary damper 13 is accommodated in the base end part 31 of the arm 12 being formed as tubular in the same manner as the first embodiment.In addition, the shell 35 of rotary damper 13 is fixed on the base end part 31 of arm 12, and rotating part 36 is fixed on the bearing portion 122A of the side of base station 111.
The disc spring 14 of present embodiment is wrapped on bar-shaped connecting member 116, and this connecting member 116 utilizes pair of bearings portion 122,122 rotatably to be supported centered by the second axis L4.The one end being positioned at the length direction of the disc spring 14 of inner circumferential side is fixed on connecting member 116.In addition, the other end being positioned at the disc spring 14 of outer circumferential side is fixed on base station 111.This disc spring 14 is configured to adjoin with the shell 35 of rotary damper 13 on the direction orthogonal with two axis L3, L4.
Gear mechanism 115 has the first gear 141 of being integrally formed with the base end part 31 of arm 12 and is fixed on the second gear 142 engaged on connecting member 116 and with the first gear 141.
The position that first gear 141 staggers with the shell 35 of rotary damper 13 on first axle L3 direction, is integrally formed with the peripheral part of base end part 31.Thus, the synchronous rotary in rotary moving of the base end part 31 of the first gear and arm.The position that second gear 142 staggers with disc spring 14 on the second axis L4 direction, is fixed on connecting member 116.Thus, the synchronous rotary in rotary moving of the free end of the second gear and disc spring 14 and one end of length direction.The radial dimension of the second gear 142 is set as less than the radial dimension of the first gear 141.
The snubber assembly 100 of the present embodiment of structure described above is arranged on piano 1 in the same manner as the snubber assembly 10 of the first embodiment.
Next, the action of the snubber assembly 100 of present embodiment is described.
Making cover of keyboard 3 in rotary moving to (with reference to Fig. 1) during the CL of covering position along closing direction CD from open position OP, in the same manner as the situation of the first embodiment, the shell 35 of arm 12 and rotary damper 13 relative to rotating part 36 from initial position IP along the second sense of rotation R2 swing offset to position of rotation RP.In addition, the in rotary moving of arm 12 is delivered to disc spring 14 via gear mechanism 115, and the therefore windup-degree of disc spring 14 also displacement makes disc spring 14 exert a force along the first sense of rotation R1 to arm 12.Thus, the damping force of rotary damper 13 and the acting force of disc spring 14 put on the in rotary moving of cover of keyboard 3 via arm 12, thus slowly can close cover of keyboard 3.
On the other hand, making cover of keyboard 3 in rotary moving to (with reference to Fig. 1) during open position OP along opening direction OD from covering position CL, the acting force of disc spring 14 is delivered to arm 12 via gear mechanism 115, and therefore the shell 35 of arm 12 and rotary damper 13 utilizes the acting force of disc spring 14 to return to initial position IP from above-mentioned position of rotation RP.In addition, the windup-degree of disc spring 14 also turns back to original state.
Utilize the snubber assembly 100 of present embodiment, the effect identical with the first embodiment can be obtained.
And, utilize the snubber assembly 100 of present embodiment, arm 12 and disc spring 14 utilize the gear mechanism 115 with the first large gear 141 of radial dimension and little the second gear 142 of radial dimension to link, therefore relative to the anglec of rotation of arm 12, rotary damper 13, the displacement of the windup-degree of disc spring 14 increases.Thereby, it is possible to the disc spring using actual spring constant less than the situation of the first embodiment.Therefore, it is possible to more easily design is applicable to the snubber assembly of the braking of cover of keyboard 3.
In addition, utilize the snubber assembly 100 of present embodiment, disc spring 14 with use as force application part " torsionspring " patent documentation 1 structure compared with, because the displacement of windup-degree can be set as very large (such as more than 360 degree), therefore, it is possible to improve the design freedom of snubber assembly 100.
Above, utilize two embodiments to specifically illustrate the present invention, but the invention is not restricted to above-mentioned embodiment, do not departing within the scope of main idea of the present invention and can carry out various change.
Such as, in the above-described embodiment, snubber assembly 10,100 have base station 11,111, such as, also can not have base station 11,111.In this case, the base end part 31 of arm 12 and connecting member 116 can be mounted to relative to framework 4 crossbeam-rotating freely.
In addition, snubber assembly 10,100 of the present invention is not limited to be arranged on the upright piano of above-mentioned embodiment, such as, also can be arranged on grand piano.In addition, the hammering that utilizes that the invention is not restricted to upright piano, grand piano etc. such is beaten on the acoustic piano of string, such as, also can be applicable to the various keyboard instruments such as the pianotron in the same manner as acoustic piano with cover of keyboard.
Claims (5)
1. a snubber assembly, is arranged at keyboard instrument, and described keyboard instrument has main body and the cover of keyboard being mounted to can swing relative to described main body, and the feature of described snubber assembly is to have:
Arm, its base end part is supported to and can rotates relative to described main body, and its leading section abuts with the back side of described cover of keyboard;
Rotary damper, it is to the applying damping force in rotary moving of described arm;
Disc spring, it exerts a force along the first sense of rotation to described arm, to make described arm to the direction pressing of opening described cover of keyboard.
2. snubber assembly as claimed in claim 1, is characterized in that,
Described disc spring is wrapped on the rotating part of described rotary damper.
3. snubber assembly as claimed in claim 1, is characterized in that,
Also there is the gear mechanism linking described arm and described disc spring.
4. snubber assembly as claimed in claim 3, is characterized in that,
The function that the variable quantity that described gear mechanism has the anglec of rotation making the variable quantity of the windup-degree of described disc spring relative to described arm increases.
5. the snubber assembly as described in claim 3 or 4, is characterized in that,
Described gear mechanism has the first gear and the second gear, the described base end part synchronous rotary of described first gear and described arm; The free end synchronous rotary of the length direction of described second gear and described disc spring, with described first gears meshing;
The radial dimension of described second gear is less than the radial dimension of described first gear.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013-228349 | 2013-11-01 | ||
| JP2013228349A JP2015087708A (en) | 2013-11-01 | 2013-11-01 | Buffer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104616637A true CN104616637A (en) | 2015-05-13 |
Family
ID=53050524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410582238.XA Pending CN104616637A (en) | 2013-11-01 | 2014-10-27 | Buffering device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2015087708A (en) |
| CN (1) | CN104616637A (en) |
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| JPH09126265A (en) * | 1995-10-31 | 1997-05-13 | Totsuku Bearing Kk | Rotary damper and cover opening/closing device with the damper |
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| JP2000250529A (en) * | 1999-03-01 | 2000-09-14 | Sasaki Kogyosho:Kk | Keyboard lid opening and closure assisting tool |
| US6288313B1 (en) * | 1999-09-10 | 2001-09-11 | Yamaha Corporation | Keyboard musical instrument having split rear top board and/or visual display unit |
| CN1469340A (en) * | 2002-06-28 | 2004-01-21 | 卡西欧计算机株式会社 | Cover opening & closing device for keyboard instrument |
| CN1497531A (en) * | 2002-10-09 | 2004-05-19 | 雅马哈株式会社 | Stop device for keyboard cover of keyboard instrument |
| JP2005250377A (en) * | 2004-03-08 | 2005-09-15 | Yamaha Corp | Musical instrument |
| CN101000760A (en) * | 2006-01-12 | 2007-07-18 | 雅马哈株式会社 | Keyboard musical instrument with fallboard and rotary connector used for fallboard |
| CN100432478C (en) * | 2005-10-12 | 2008-11-12 | 拓基轴承株式会社 | Buffer unit using rotating damper |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4064510B2 (en) * | 1997-11-27 | 2008-03-19 | 不二ラテックス株式会社 | Shock absorber |
| JPH11159557A (en) * | 1997-11-28 | 1999-06-15 | Fuji Seiki Co Ltd | Shock absorber |
| US6686521B2 (en) * | 2001-03-30 | 2004-02-03 | Yamaha Corporation | Keyboard instrument |
| JP5292795B2 (en) * | 2007-12-17 | 2013-09-18 | カシオ計算機株式会社 | Keyboard lid opening and closing device |
| JP2011075723A (en) * | 2009-09-29 | 2011-04-14 | Casio Computer Co Ltd | Keyboard instrument |
-
2013
- 2013-11-01 JP JP2013228349A patent/JP2015087708A/en active Pending
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2014
- 2014-10-27 CN CN201410582238.XA patent/CN104616637A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09126265A (en) * | 1995-10-31 | 1997-05-13 | Totsuku Bearing Kk | Rotary damper and cover opening/closing device with the damper |
| JPH11161263A (en) * | 1997-11-28 | 1999-06-18 | Fuji Seiki Co Ltd | Opening and closing device for foldable cover |
| JP2000250529A (en) * | 1999-03-01 | 2000-09-14 | Sasaki Kogyosho:Kk | Keyboard lid opening and closure assisting tool |
| US6288313B1 (en) * | 1999-09-10 | 2001-09-11 | Yamaha Corporation | Keyboard musical instrument having split rear top board and/or visual display unit |
| CN1469340A (en) * | 2002-06-28 | 2004-01-21 | 卡西欧计算机株式会社 | Cover opening & closing device for keyboard instrument |
| CN1497531A (en) * | 2002-10-09 | 2004-05-19 | 雅马哈株式会社 | Stop device for keyboard cover of keyboard instrument |
| JP2005250377A (en) * | 2004-03-08 | 2005-09-15 | Yamaha Corp | Musical instrument |
| CN100432478C (en) * | 2005-10-12 | 2008-11-12 | 拓基轴承株式会社 | Buffer unit using rotating damper |
| CN101000760A (en) * | 2006-01-12 | 2007-07-18 | 雅马哈株式会社 | Keyboard musical instrument with fallboard and rotary connector used for fallboard |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2015087708A (en) | 2015-05-07 |
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Application publication date: 20150513 |