CN205104211U - Improved generation light piano bail post - Google Patents
Improved generation light piano bail post Download PDFInfo
- Publication number
- CN205104211U CN205104211U CN201520915894.7U CN201520915894U CN205104211U CN 205104211 U CN205104211 U CN 205104211U CN 201520915894 U CN201520915894 U CN 201520915894U CN 205104211 U CN205104211 U CN 205104211U
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- Prior art keywords
- piano
- nail head
- connecting portion
- bail
- bail post
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Abstract
The utility model discloses an improved generation light piano bail post, include the pin fin portion that is cylinder form of making by the aluminium material to and integrative and set up with one heart in the column connecting portion of pin fin portion bottom, be equipped with the connection external screw thread that is used for installing on the piano key on the outer wall of connecting portion, the top of pin fin portion is equipped with saliently and is used for contacting the circular arc top that action shakes the axostylus axostyle to be equipped with several decrement through -hole at pin fin portion waist with running through its both sides, this pin fin portion and connecting portion pass through anodic oxidation treatment and form the inoxidizing coating of one deck stereoplasm on its whole surface, and right circular arc top polishing treatment forms smooth top surface. The utility model discloses a material of light and the structure of light improve the efficiency that the key passed power to improved pianist's operation sense of touch impression, the dependability and the smoothness that adopt anodic oxidation treatment and polishing treatment to improve the bail post have simultaneously effectively reduced and have shaken the frictional force between the axostylus axostyle contact felt, thereby has improved piano action's performance.
Description
Technical field
The utility model relates to piano striking machine technical field, and specifically, what relate to is the improved light weight piano bail post that a kind of friction force is little.
Background technology
Piano striking machine is the core of a piano, and wherein each action part is all rotating lever, by these rotating levers, the action of piano key is delivered to hammerhead length by length, thus knocks piano string vibration sounding.Wherein, the action of key is transferred to shake axostylus axostyle by bail post, then utilizes the rotating lever effect of hammered string instrument, key action is delivered on hammerhead.By desirable way, bail post is light as far as possible, and will have friction factor little as far as possible on the surface of pressing shake axostylus axostyle contact felt.
The typical bail post of tradition is formed by brass machining, so directly causes two root problems:
First brass is heavy, and general density is about 8.47-8.75g/cm
3, cause quality excessive.Piano manufacture typical practice in, be by key front end place plummet mode increase more multimass offset the quality of bail post, as Fig. 1.The inertia of such generation is considered as extra and unnecessary sense of touch resistance by pianist.
It two is that brass is polished all the time as smooth surface, to produce friction factor little as far as possible between bail post and shake axostylus axostyle base.Friction force between bail post and shake axostylus axostyle base is little, and the playing property for any piano striking machine is all very important.Find after deliberation, under any one normal barometric pressure, brass all can tarnish, and tarnish substantially increases the friction force between bail post and shake axostylus axostyle contact felt, such friction force is worthless, and in fact also reduces the performance of piano striking machine.
Utility model content
For overcome prior art exist the problems referred to above, the utility model provide a kind of novel, design the little improved light weight piano bail post of ingenious, convenient and practical friction force.
To achieve these goals, the technical solution adopted in the utility model is as follows:
A kind of improved light weight piano bail post, comprise the nail head in cylindrical shape be made up of aluminum, and one is also arranged at the column connecting portion of nail head bottom with one heart, wherein, the outer wall of described connecting portion is provided with the connection external thread for being arranged on piano key, the top of described nail head is provided with the dome for contacting hammered string instrument shake axostylus axostyle projectedly, and is provided with several decrement through hole with running through its both sides at nail head waist; This nail head and connecting portion form the protective layer of one deck hard at its integral surface by anodized, and form smooth top face to described dome polishing.
Particularly, described protective layer is made up of aluminium oxide.Further, there is the Rockwell hardness number of the bail post skin hardness of described protective layer between 60 to 65.And described polishing makes protective layer form a kind of stable and smooth surface own.
Further, described nail head waist is provided with indent in the decrement groove of its side.
In order to attractive in appearance, the bottom land edge of described decrement groove is set to fillet.
Also it should be noted that, key point of the present utility model is based on following 2 points: one, because the density of aluminium is 2.69g/cm
3compared to the density of brass, the aluminium part quality of same volume is only 1/3rd of brass parts, its weight is light and handy, often for aircraft industry aspect, and the utility model is based on the light-weight requirements of bail post, the quality of a critical positions in piano is alleviated the use of aluminium, facilitate hammered string instrument to play better effects if.Although two, aluminium light weight but also flexible relative, easily its original moulding is changed under the effect of some external force, and after aluminium is adopted anodized, one deck oxidation protection layer can be formed in bail post surface coverage, its composition is aluminium oxide, because the character of aluminium oxide is stone, this protective layer makes bail post skin hardness greatly improve, and effectively overcomes the defect of the flexible relative of aluminium own; And in chemistry, aluminium is a kind of comparatively active metal, be easy in atmosphere be oxidized, and anodized being carried out to aluminium bail post surface can being made on one's own initiative to form the stable and protective layer of hard of shifting to an earlier date, protect the aluminium in it from further oxidation; The more important thing is, this stable and aluminum oxide protective layer of hard is after polishing, smooth surface can not only be formed, and its stability and solidness can be kept, the bail post of brass material easily tarnishes than ever mutually, such modified bail post can keep smooth indefinitely, thus ensures the less friction good for a long time to shake axostylus axostyle, improves piano performance.
Compared with prior art, the utility model has following beneficial effect:
The utility model is for the shortcoming of bail post in existing piano striking machine force transferring structure, the material of lightweight and the structure of lightweight is adopted to improve the efficiency of key power transmission, and improve the operation feeling impression of pianist, adopt anodized and polishing to improve solidness and the smoothness of bail post simultaneously, effectively reduce and shake axostylus axostyle and contact friction force between felt, thus improve the performance of piano striking machine, and the utility model is novel, design ingenious, structure is simple, convenient and practical, be with a wide range of applications, be applicable to applying.
Accompanying drawing explanation
Fig. 1 is the structural representation of bail post and key part in prior art.
Fig. 2 is structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, and embodiment of the present utility model includes but not limited to the following example.
Embodiment
As shown in Figure 2, this improved light weight piano bail post 10, comprise the nail head 11 in cylindrical shape be made up of aluminum, and one is also arranged at the column connecting portion 12 of nail head bottom with one heart, wherein, the outer wall of described connecting portion is provided with the connection external thread 13 for being arranged on piano key, and the top of described nail head is provided with the dome 14 for contacting hammered string instrument shake axostylus axostyle projectedly, and is provided with several decrement through hole 15 with running through its both sides at nail head waist; This nail head and connecting portion form the protective layer of one deck hard at its integral surface by anodized, and form smooth top face to described dome polishing.Further, described nail head waist is provided with indent in the decrement groove 16 of its side.In order to attractive in appearance, the bottom land edge of described decrement groove is set to fillet.
Particularly, described protective layer is made up of aluminium oxide.Further, there is the Rockwell hardness number of the bail post skin hardness of described protective layer between 60 to 65.And described polishing makes protective layer form a kind of stable and smooth surface own.
Piano key 1 offers mounting hole, and built-in internal thread, mate with the described external thread that is connected.Meanwhile, key front end no longer needs perforate balance lead 2 is installed, also improve key integrality, reduce difficulty of processing.
By above-mentioned setting, substantially reduce the quality of bail post, improve the touch feeling to key when pianist plays button, also maintain the smooth of bail column top steadily in the long term simultaneously, reduce the friction force to hammered string instrument shake axostylus axostyle contact felt, thus improve piano performance.
Above-described embodiment is only preferred embodiment of the present utility model; restriction not to the utility model protection domain; in every case design concept of the present utility model being adopted, and the change carried out non-creativeness work on this basis and make, all should belong within protection domain of the present utility model.
Claims (4)
1. an improved light weight piano bail post, it is characterized in that, comprise the nail head in cylindrical shape be made up of aluminum, and one is also arranged at the column connecting portion of nail head bottom with one heart, wherein, the outer wall of described connecting portion is provided with the connection external thread for being arranged on piano key, and the top of described nail head is provided with the dome for contacting hammered string instrument shake axostylus axostyle projectedly, and is provided with several decrement through hole with running through its both sides at nail head waist; This nail head and connecting portion form the protective layer of one deck hard at its integral surface by anodized, and form smooth top face to described dome polishing.
2. a kind of improved light weight piano bail post according to claim 1, it is characterized in that, described protective layer is made up of aluminium oxide.
3. a kind of improved light weight piano bail post according to claim 2, it is characterized in that, described nail head waist is provided with indent in the decrement groove of its side.
4. a kind of improved light weight piano bail post according to claim 3, it is characterized in that, the bottom land edge of described decrement groove is set to fillet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520915894.7U CN205104211U (en) | 2015-11-17 | 2015-11-17 | Improved generation light piano bail post |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520915894.7U CN205104211U (en) | 2015-11-17 | 2015-11-17 | Improved generation light piano bail post |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205104211U true CN205104211U (en) | 2016-03-23 |
Family
ID=55519974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520915894.7U Active CN205104211U (en) | 2015-11-17 | 2015-11-17 | Improved generation light piano bail post |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205104211U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105280161A (en) * | 2015-11-17 | 2016-01-27 | 成都伯格特钢琴自动演奏系统有限公司 | Improved light piano clamp stud |
-
2015
- 2015-11-17 CN CN201520915894.7U patent/CN205104211U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105280161A (en) * | 2015-11-17 | 2016-01-27 | 成都伯格特钢琴自动演奏系统有限公司 | Improved light piano clamp stud |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |