CN100449609C - Keyboard musical instrument with motion mechanism - Google Patents
Keyboard musical instrument with motion mechanism Download PDFInfo
- Publication number
- CN100449609C CN100449609C CNB021304831A CN02130483A CN100449609C CN 100449609 C CN100449609 C CN 100449609C CN B021304831 A CNB021304831 A CN B021304831A CN 02130483 A CN02130483 A CN 02130483A CN 100449609 C CN100449609 C CN 100449609C
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- musical instrument
- keyboard musical
- action
- actuating mechanism
- action component
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- Electrophonic Musical Instruments (AREA)
Abstract
The present invention relates to a keyboard musical instrument with a motion mechanism which is arranged for preventing action components made from synthetic resin from being charged so as to eliminate flaws generated by dust and particles under electrostatic attraction. The motion mechanism comprises a plurality of connected action components which comprise a sound hammer. The motion mechanism acts by pressing a key to swing a sound hammer which hammers a string. At least one component made of synthetic resin in the motion components has electric conductivity on the surface.
Description
Technical field
The present invention relates to a kind of keyboard musical instrument with actuating mechanism, this actuating mechanism is moved in response to related with it pressing of key, and to swing a hammer, this hammer knocks a string again.
Background technology
A kind of actuating mechanism that is used for keyboard musical instrument, it moves in response to related with it pressing of key, and to swing a hammer, this hammer knocks a string again.The actuating mechanism that is used for a grand piano is made of a plurality of action components, and it comprises and sweep moving part that this member supporting is at the rear portion of key, to be used for doing pivoting action around this key rear end; One double action bar, it sweeps part with this pivotally and is connected; One drive link; And like.
When key is pressed from a free state, sweep part and raised, double action bar and drive link are moved upward pivotally together.In conjunction with the pivoting action of these parts, this drive link boosts a hammer, and it is upwards swung to knock a string placed on it again.
In the last few years, the parts of making by the synthetic resin keyboard musical instrument that had actuating mechanism more and more.This is because the parts of being made by synthetic resin are compared with those wooden parts, can turn round in degree of precision under lower cost, and under such as environmental changes such as humidity variations, its dimension and weight can not change.
Yet when being used to an actuating mechanism by the made conventional components of synthetic resin, the action of this actuating mechanism can cause its action component phase mutual friction and be easy to be recharged, cause the generation of static when above-mentioned.Because synthetic resin is a kind of insulating material, static is in case produce, and can keep usually and can not disappear.Electrostatic attraction dust in air, particulate and similar substance make and produce fault on the action component.Particularly in the zone that actuating mechanism is received, a hammer is subjected to the friction of a string and produces particulate, and makes actuating mechanism be easier to occur fault, fault, life-span minimizing and analogue.
Goal of the invention
Generation of the present invention has solved the problems referred to above, and the purpose of this invention is to provide a kind of actuating mechanism and a kind of keyboard musical instrument that is used for keyboard musical instrument with actuating mechanism, it can prevent that the action component of being made by synthetic resin charges, eliminated fault thus, fault is that dust in air and particulate produce because of electrostatic interaction attracted on the action component.
For achieving the above object, the invention provides a kind of actuating mechanism that is used for keyboard musical instrument, it is configured to move to produce sound in response to pressing of key.This actuating mechanism is characterised in that and comprises a plurality of action components that wherein at least one parts of being made by synthetic resin has electrical conductance at least in its surface.
This actuating mechanism that is used for keyboard musical instrument is configured to move in response to pressing of key, to swing a hammer, by its a plurality of action components, makes this hammer knock string.Because at least one parts made by synthetic resin in a plurality of action components have electrical conductance at least in its surface, during the actuating mechanism action, its action component phase mutual friction and the static that produces can promptly be eliminated, and can prevent that thus action component is recharged.This has caused action component can not produce by dust in air and particulate being subjected to electrostatic attraction and the fault that produces.Therefore, can eliminate fault and life-span reduction according to this actuating mechanism of the present invention.
Preferably, be used for the actuating mechanism of keyboard musical instrument, at least one action component is applied with an antistatic coating in its surface.
At this preferred embodiment of the actuating mechanism that is used for keyboard musical instrument, because at least one action component is applied with an antistatic coating in its surface, by eliminating static along the conductivity surface, these action components can be avoided being recharged.Thus, only by using an antistatic coating, for example, it can realize aforementioned effect of the present invention on the surface of a common nonconducting synthetic resin.
Be used for the actuating mechanism of keyboard musical instrument, preferably, at least one action component applies antistatic coating by dipping.
This preferred embodiment in the actuating mechanism that is used for keyboard musical instrument, because antistatic coating is applied in by dipping, the surface of action component can be coated with fully with antistatic coating, is different from brushing, charging can not stay the part that some are not coated with, so can be prevented from undoubtedly.In addition, the mode of the comparable brushing of dipping of antistatic coating more easily is employed.
Be used for the actuating mechanism of keyboard musical instrument, preferably, comprising in a plurality of action components that at least one deposits the action component of conducting metal in its surface.
At this preferred embodiment of the actuating mechanism that is used for keyboard musical instrument, by conductive metal deposition on its at least one action component surface, charging can be prevented from.In addition, owing to do not need a baking step, it is involved in using antistatic coating, and required manufacture process can be simplified.
Be used for the actuating mechanism of keyboard musical instrument, preferably, its at least one action component comprises one by the moulded parts made of conduction synthetic resin.
This preferred embodiment in the actuating mechanism that is used for keyboard musical instrument, because its at least one action component itself is made by conduction synthetic resin, antistatic property can be provided easily, and needn't after molded, apply antistatic coating, conductive metal deposition and similar fashion again.
Be used for the actuating mechanism of keyboard musical instrument, preferably, at least one described action component comprises by the interconnected a plurality of action components of conductive engagement rr, wherein is connected with a grounded parts by at least one parts in the interconnected described a plurality of action components of described engagement device.
This preferred embodiment in the actuating mechanism that is used for keyboard musical instrument, because the engagement device between a plurality of action components is an electric conductivity, and its at least one action component is connected with grounded parts, the static that produces on a certain action component must promptly be transferred to grounded parts by engagement device and other action component, can guarantee that thus its action component is not recharged.
Be used for the actuating mechanism of keyboard musical instrument, preferably, its engagement device comprises a spacer fabric.
The actuating mechanism that is used for keyboard musical instrument generally includes a spacer fabric, and this spacer fabric is twined the engagement device of action component to prevent wearing and tearing and noise.Thus, according to this preferred embodiment that is used for the actuating mechanism of keyboard musical instrument, existing spacer fabric can be utilized and provide electrical conductance, so that aforesaid anti-charging effect to be provided easily.
Be used for the actuating mechanism of keyboard musical instrument, preferably, spacer fabric is flooded by an antistatic agent.
At this preferred embodiment of the actuating mechanism that is used for keyboard musical instrument,, can be easy to guarantee the electrical conductance of spacer fabric by spacer fabric is flooded antistatic agent.
Be used for the actuating mechanism of keyboard musical instrument, preferably, its spacer fabric is to be made by a conducting fibre.
At this preferred embodiment of the actuating mechanism that is used for keyboard musical instrument,, can guarantee the electrical conductance of spacer fabric, and not need the dipping of antistatic agent because its spacer fabric itself is to be made by a conducting fibre.
Description of drawings
Fig. 1 is the side view of the actuating mechanism used in a grand piano, and it comprises a hammer and a key of one embodiment of the present of invention; With
Fig. 2 is the decomposition diagram in the actuating mechanism shown in Fig. 1.
Embodiment
Below, with an actuating mechanism of describing in conjunction with the accompanying drawings according to one embodiment of the present of invention.Fig. 1 and 2 shows the actuating mechanism that is used for a grand piano among the embodiment.Be noted that at first following description makes according to following supposition, that is, from the player, nearside (right side in Fig. 1) is the front side, and distally (left side in Fig. 1) is rear side.
Be provided with an actuating mechanism 5 for each key 9, and this mechanism comprises a plurality of action components, it comprises and sweeps moving part 8, one double action bars 17, one drive links 6, one hammer 7, with appreciable like in two figure, as shown in Figure 1, this actuating mechanism 5 be connected with support 11 (only having shown one of them among the figure), this support be arranged on a keyframe (not shown) about in two end portion, key 9 supports on these keyframves.Make by the aluminum extrusion die product and sweep moving part guide rail 12 and a hammer handle guide rail 13 extends between left and right sides support 11.The rear end that sweeps part 8 pivotally with sweep moving part flange 14 and be connected, this flange is fixed on screw and sweeps on the part guide rail 12.Put and lean against on the capstan winch button 15 along the part 8 that sweeps that depth direction extends, this capstan winch button is by sweeping the rear end that moving part heel 8a is arranged on the top of a corresponding key 9.
It is one L shaped that drive link 6 forms, and comprise as the lower part: a hammer upper push-rod 6a, and it vertically extends and has a rectangular cross section; One adjusting knob abutting part 6b, it extends to rear side with an angle that is roughly the right angle from the lower end of hammer upper push-rod 6a.Drive link 6 is connected with the front end that sweeps part 8 pivotly in its corner.The upper end of hammer upper push-rod 6a is bonded in the drive link pilot hole 17a of double action bar 17, moves along depth direction being used for.Drive link 6 is promoted by a circulation spring 20 that promotes double action bar 17 in backhaul direction (counter clockwise direction among Fig. 1).
One drive link button screw 28 screws in the center section of the hammer upper push-rod 6a of drive link 6 movably, to be used to adjust the position, angle of drive link 6.This drive link button screw 28 extends through hammer upper push-rod 6a along depth direction.One drive link button 25 is formed by the front end of drive link button screw 28.This drive link button 25 is resisted against an embedding with free state and sweeps on the spoon 29 of part 8.
On the other hand, one regulate the bottom that guide rail 24 usefulness Luo silks are fixed on hammer handle guide rail 13.One adjusting knob 19 screws in the bottom of regulating guide rail 24 movably, to be used to limit the pivoting action that makes progress of drive link 6.This adjusting knob 19 is faced mutually with the front end of the adjusting knob abutting part 6b of drive link 6, leaves a predetermined spacing therebetween.
Hammer 7 comprises that successively a wooden hammer handle 21 and along the depth direction extension is connected the tup 22 of the front end of hammer handle 21.The bottom end of hammer handle 21 is connected with hammer handle flange 23 pivotly, and this flange is fixed on the hammer handle guide rail 13 with screw.One shank roller 18 is by forming such as the cylindrical crust of inner fabrics and fabric outside institute's coiled, and it is connected in the rear portion of hammer handle 21 bottoms at a preposition place.This shank roller 18 be supported on drive link pilot hole 17a near, also straddle the top of double action bar 17.
As shown in Figure 2, by to be the mode of the active joint at center, sweep part 8 and sweep part flange 14 and be connected around tiny iron centrepin 3.Drive link 6 similarly by being the mode of the active joint at center with tiny iron centrepin 3, is connected with double action bar 17.One spacer fabric 4 is wrapped on each centrepin 3, being used for when these action components move pivotally, reducing friction and prevents noise.
According to the actuating mechanism 5 of constructing as mentioned above, when key 9 by when free state is as shown in Figure 1 pressed, sweep part 8 and boosted,, cause sweeping double action bar 17 and the drive link 6 that part 8 is connected and move upward pivotally with this with upwards motion pivotally by capstan winch button 15.And then, double action bar 17 slides shank roller 18, and by pushing away hammer 7 on the shank roller 18, makes its swing, knocks a setting string (not shown) thereon to force hammer 7.
Except hammer handle etc. was wooden, these action components of forming actuating mechanism 5 were to be made by synthetic resin, for example ABS resin.
Equally, in this embodiment, among these action components of making by synthetic resin, sweep part flange 14, sweeping part 8, applying an antistatic coating on the surface of drive link 6 and double action bar 17.This antistatic coating is to be made by a solution that comprises the ultra-fine grain conducting metal oxide, and is applied on the base material, to form a conductive film thereon, provides anlistatig effect thus.
For example, when antistatic coating put on the action component of being made by synthetic resin by a brush, the resistance value on resulting surface was 10
8To 10
9In the scope of Ω.Usually, the material as synthetic resin, it presents high electrical insulation characteristics, has 10
15To 10
16Very high resistance in the scope of Ω can not disappear to such an extent as to static in case produce, just accumulates on the synthetic resin.As everyone knows, be not higher than 10 when resistance value
12During Ω, dust is not by electrostatic attraction.Thereby, from the sheet resistance value that is applied to the antistatic coating gained on the action component as can be known,, can provide enough antistatic properties owing on the surface of the action component of making by synthetic resin, apply antistatic coating.
Therefore, even the phase mutual friction by action component produces static, it is with relevant from the be pressed action of the actuating mechanism 5 that causes of free state by key 9, and the antistatic coating that is applied on the action component has prevented that static from gathering thereon, and allows the static disappearance.As a result, action component can avoid being recharged, and has eliminated thus by dust in air and particulate and has been subjected to electrostatic attraction and the fault that produces.
This antistatic coating can apply by the method known to any simultaneously, for example spraying, dip coating, brushing and similar approach, dip coating is preferred, because it needs less step and equipment, and can suitably antistatic coating be coated the surface of action component, not be coated with or be coated with inhomogeneous and can not be left some parts.Like this, action component can avoid being recharged undoubtedly.
Perhaps, as the alternative selection that puts on the antistatic coating on the action component, a conducting metal, for example, copper, aluminium or metalloid can be deposited on the surface of the action component of being made by synthetic resin, thereby produce same effect.For example, when this conducting metal is arranged on the surface of action component, the static that on any action component, produces, the effect by set metal disappears, and this has produced and has used the identical effect that antistatic coating provided.In addition, this setting does not need drying course required when antistatic coating applies, and makes manufacture process simplify.
Can be further alternatively, it also is feasible using the next molded action component of synthetic resin of an intrinsic conduction, itself can provide antistatic property, rather than give the action component of making by synthetic resin antistatic property, after molded, as the situation that applies antistatic coating or conductive metal deposition.The conduction synthetic resin that is applicable to this effect can be the synthetic resin such as carbon containing.The resistivity measurements on the surface of the parts of being made by this conduction synthetic resin is one less than 10
8The numerical value of Ω.From then on the result has guaranteed sufficient antistatic property by the action component that this conduction synthetic resin is made as can be known, and generation and the identical effect of antistatic coating.In addition, this conduction synthetic resin can provide antistatic property easily not applying at the antistatic coating after molded under the situation of step or deposition of conductive metals step.
Give the action component antistatic property except that aforesaid, the spacer fabric 4 that being arranged at shown in Fig. 2 sweeps in the joint of part 8 can be flooded by an antistatic agent.Used antistatic agent for example can contain and aforesaid antistatic coating identical component in this situation.Sweep part guide rail 12 by suitable method ground connection.Like this, even on such as double action bar 17, produce static, this static is via sweeping the centrepin 3 of part 8 with the steel of the joint of double action bar 17 and spacer fabric 4, sweep part 8, sweep the centrepin 3 of part 8 and the joint that sweeps part flange 14 and spacer fabric 4 and sweep part flange 14, flow to sweeping part guide rail 12 and flowing to the earth of aluminum, guaranteed that thus static rapidly disappears, in case stop is recharged as parts.
As the selection that substitutes aforesaid dipping antistatic agent, the fiber of an intrinsic conduction can use as the material of spacer fabric 4, to provide spacer fabric 4 antistatic properties own.Used conductive fiber can be the fiber such as a carbon containing in this situation.The spacer fabric of making by this conductive fiber 4 can provide fully with the identical effect of the spacer fabric 4 of antistatic agent dipping.In addition, do not need step, can guarantee the electrical conductance of spacer fabric 4 with antistatic agent dipping spacer fabric 4.
Simultaneously in the foregoing embodiments, antistatic property has been given and has been swept part 8, double action bar 17, drive link 6 and sweep part flange 14, and except these parts, antistatic property can be given other action component of being made by synthetic resin.
Equally, in the foregoing embodiments, hammer handle 21 is wooden because of it, so be not endowed antistatic property.Yet if hammer handle 21 is also made by synthetic resin, antistatic property also can be given hammer handle 21.
In addition, aforesaid embodiment has represented that the present invention is applied to the example in the grand piano, and the present invention also can be applied to a upright piano, and one has the mellotron of actuating mechanism, and similar musical instrument.
By aforesaid embodiment as can be known, according to the actuating mechanism that is used for a keyboard musical instrument of the present invention, can prevent to be recharged, and can prevent undoubtedly that thus these parts generations are subjected to electrostatic attraction and are produced fault by dust in air and particulate by the action component that synthetic resin is made.
Claims (9)
1. the keyboard musical instrument of a concrete actuating mechanism, described actuating mechanism is configured to move in response to pressing of key, and to swing a hammer, described actuating mechanism comprises:
A plurality of action components, at least one parts in the described action component are made by synthetic resin, and have electrical conductance at least on the surface of described at least one parts.
2. keyboard musical instrument as claimed in claim 1 is characterized in that, described at least one action component is applied with an antistatic coating on its surface.
3. keyboard musical instrument as claimed in claim 2 is characterized in that, described at least one action component is applied with described antistatic coating by dipping.
4. keyboard musical instrument as claimed in claim 1 is characterized in that, described a plurality of action components comprise that at least one action component deposits conducting metal on its surface.
5. keyboard musical instrument as claimed in claim 1 is characterized in that, described at least one action component comprises one by the moulded parts made of conduction synthetic resin.
6. keyboard musical instrument as claimed in claim 1, it is characterized in that, described at least one action component comprises by the interconnected a plurality of action components of conductive engagement rr, wherein is connected with a grounded parts by at least one parts in the interconnected described a plurality of action components of described engagement device.
7. keyboard musical instrument as claimed in claim 6 is characterized in that described engagement device comprises a spacer fabric.
8. keyboard musical instrument as claimed in claim 7 is characterized in that described spacer fabric is flooded by an antistatic agent.
9. keyboard musical instrument as claimed in claim 7 is characterized in that described spacer fabric is made by a conductive fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021304831A CN100449609C (en) | 2002-08-21 | 2002-08-21 | Keyboard musical instrument with motion mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021304831A CN100449609C (en) | 2002-08-21 | 2002-08-21 | Keyboard musical instrument with motion mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1477615A CN1477615A (en) | 2004-02-25 |
| CN100449609C true CN100449609C (en) | 2009-01-07 |
Family
ID=34144489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021304831A Expired - Lifetime CN100449609C (en) | 2002-08-21 | 2002-08-21 | Keyboard musical instrument with motion mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100449609C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6737040B2 (en) * | 2015-07-23 | 2020-08-05 | ヤマハ株式会社 | Support assembly and keyboard device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87213506U (en) * | 1987-09-22 | 1988-05-11 | 中国康华实业公司南方分公司深圳支公司 | Electronic piano key board |
| US4840104A (en) * | 1987-03-03 | 1989-06-20 | Kawai Musical Instrument Manufacturing Co., Ltd. | Keyboard |
| CN1148897A (en) * | 1995-05-01 | 1997-04-30 | 株式会社河合乐器制作所 | Antibacterial keyboard |
| US5811702A (en) * | 1995-09-25 | 1998-09-22 | Yamaha Corporation | Keyboard musical instrument having hammer heads formed of metallic powder containing synthetic resin and process of fabricating hammer assembly |
-
2002
- 2002-08-21 CN CNB021304831A patent/CN100449609C/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4840104A (en) * | 1987-03-03 | 1989-06-20 | Kawai Musical Instrument Manufacturing Co., Ltd. | Keyboard |
| CN87213506U (en) * | 1987-09-22 | 1988-05-11 | 中国康华实业公司南方分公司深圳支公司 | Electronic piano key board |
| CN1148897A (en) * | 1995-05-01 | 1997-04-30 | 株式会社河合乐器制作所 | Antibacterial keyboard |
| US5811702A (en) * | 1995-09-25 | 1998-09-22 | Yamaha Corporation | Keyboard musical instrument having hammer heads formed of metallic powder containing synthetic resin and process of fabricating hammer assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1477615A (en) | 2004-02-25 |
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Granted publication date: 20090107 |