CN1758328A - Key balancer built-in hole of key - Google Patents
Key balancer built-in hole of key Download PDFInfo
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- CN1758328A CN1758328A CN 200510116523 CN200510116523A CN1758328A CN 1758328 A CN1758328 A CN 1758328A CN 200510116523 CN200510116523 CN 200510116523 CN 200510116523 A CN200510116523 A CN 200510116523A CN 1758328 A CN1758328 A CN 1758328A
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- counterweight
- balancer
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Abstract
The invention relates to a key balance device. In the invention, when a pianist pushes down a key to generate a tone, the key balance device removes a part of load which is against key movement, and a counterweight component as a part of the key balance device is divided into an deformable lump and a tool lump; when a operator meshes the counterweight component and a wooden pole, the operator in such way arranges the deformable lump onto the tool lump so as to make flange of the deformable lump relative to shoulder of the tool lump, and applies force to the deformable lump and the tool lump which are inserted into pylome formed on the wooden pole; the shoulder makes the flange become forth deformed so that transformative flange is meshed with the wooden pole in the vertical direction of wooden veins; therefore, the wooden pole cannot fracture and the counterweight component cannot drop out.
Description
Technical field
The present invention relates to a kind of keyboard instrument, relate in particular to the key balancer in a kind of key of a part of the keyboard instrument that is embedded into formation such as piano.
Background technology
Acoustic piano is an exemplary of keyboard instrument, and arranges with known form at anterior black key of piano housing and Bai Jian.Hammer and motor unit are applied to the rear portion of black key and Bai Jian with weight, and this load is resisted in the player front portion of depressing black key and Bai Jian like this, i.e. the weight of hammer and motor unit.In order partly to eliminate this weight or to reduce this load, sunk key evener in each black key and Bai Jian.The load that the duty factor that is used for resisting the key motion of black key in bass part and Bai Jian is used for resisting their key motion in the high pitch part will weigh.Therefore, the key balancer that is embedded into the black key of bass part and Bai Jianzhong will overweight the black key that is embedded into the high pitch part and one or more evener of Bai Jianzhong.
Key balancer is by one or realize more than one counterweight, and counterweight is made by lead.Thereby lead is the soft fabricator of making can conceal and thickly put it in the hole that forms in the black/white key.Yet, see that from the angle of environmental pollution it is unfavorable using lead.For this reason, the fabricator has researched and developed the key balancer of non-lead.
An exemplary of the key balancer of non-lead has been disclosed among the Japanese Patent Application Publication No.2003-177740.The key balancer of prior art is realized by the cylindrical iron body, and is formed with depression on two end surfaces of this cylindrical iron body.When the cylindrical iron body being inserted in the through hole that is formed in the wooden black/white key, the worker puts into this depression with instrument, and from the outside power is applied on the periphery of cylindrical iron body.This periphery produces distortion and is clamped by the sidepiece of wooden black/white key.Therefore, the key balancer of described prior art meshes with wooden black/white key securely.
Have a problem in the prior art key balancer, that is exactly that the periphery that is out of shape makes wooden black/white key break.Though power is not very big, wooden texture extends on the longitudinal direction of black key and Bai Jian, and because the power that is applied on it on perpendicular to the wood texture direction makes that black key and Bai Jian are easy to split along the wood texture that is exposed on the side surface.
Another problem that the key balancer of prior art further exists is that the key balancer of prior art is easy to drop out.Only the periphery that should be out of shape keeps the engagement between cylindrical iron body and the wooden black/white key.And black key and Bai Jian will serve a very long time for the player, and wooden black/white key is owing to the reason repetition pucker ﹠ bloat of ambient humidity.During the repetition of pucker ﹠ bloat, the cylindrical iron body separates with wooden black/white key, and beginning click click in wooden black key and Bai Jian makes a sound, and last cylindrical iron body drops out.
Another problem of intrinsic existence is an assembly cost in the prior art key balancer.This instrument is in particular the design of cylindrical iron body, and damages at short notice easily.Manufacturer needs many instruments that are used for assembling.This just causes very high assembly cost.
Summary of the invention
Therefore a free-revving engine of the present invention just provides a kind of key balancer, and this key balancer is economical and is durable under the condition of not damaging key.
In order to realize this purpose, the present invention advises making a kind of counterweight, and this counterweight is embedded on the privileged site of key, and the duct of this part and hollow space is spaced apart.
According to an aspect of the present invention, a kind of key balancer that is used for being installed in the key of musical instrument is provided, it comprises that at least one is installed in the counterweight in the hollow space that is formed at this key, and this key balancer is characterised in that at least one counterweight comprises the balancing weight of a plurality of part distortion, thereby can be embedded in the privileged site of key, the duct of this position and hollow space is spaced apart.
Description of drawings
Below explanation in conjunction with the drawings more is expressly understood the feature and advantage of key balancer, wherein
Fig. 1 is the skeleton view of the white key of Display Realization first embodiment of the invention,
Fig. 2 is installed in the sectional view of the key balancer counterweight partly of Bai Jianzhong for showing formation,
Fig. 3 is the deformable block of demonstration counterweight and the skeleton view of tool block,
Fig. 4 is the sectional view of the structure of demonstration deformable block,
Fig. 5 is the sectional view of the structure of show tools piece,
Fig. 6 A to 6C is the sectional view of demonstration with the method for counterweight and rod engagement,
Fig. 7 is the skeleton view of demonstration conduct according to the counterweight of another key balancer of the present invention,
Fig. 8 is the sectional view of the projection of the part of the counterweight shown in demonstration formation Fig. 7,
Fig. 9 is recessed sectional view of another part of demonstration formation counterweight,
Figure 10 A and 10B are the sectional view of demonstration with the method for counterweight and rod engagement,
Figure 11 is the skeleton view of demonstration conduct according to the counterweight of another key balancer of the present invention,
Figure 12 is the skeleton view of demonstration conduct according to the counterweight of another key balancer of the present invention,
Figure 13 is for showing as half the skeleton view according to the counterweight of another key balancer of the present invention,
Figure 14 is for showing as half the skeleton view according to the counterweight of another key balancer of the present invention,
Figure 15 is for showing as half the skeleton view according to the counterweight of another key balancer of the present invention,
Figure 16 is the skeleton view of another white key of Display Realization second embodiment of the present invention,
Figure 17 is the skeleton view that shows the counterweight of a part that forms the key balancer that is installed in Bai Jianzhong,
Figure 18 is the sectional view of the structure of demonstration projection,
Figure 19 is the sectional view of the structure of recessed of demonstration,
Figure 20 A and 20B are the sectional view that shows the method that counterweight is meshed with rod,
Figure 21 is the skeleton view of demonstration conduct according to the counterweight of another key balancer of the present invention,
Figure 22 is the skeleton view of demonstration conduct according to the counterweight of another key balancer of the present invention,
Figure 23 is for showing as half the skeleton view according to the counterweight of another key balancer of the present invention,
Figure 24 is for showing as half the skeleton view according to the counterweight of another key balancer of the present invention,
Figure 25 is for showing as half the skeleton view according to the counterweight of another key balancer of the present invention.
Embodiment
Key balancer according to the present invention comprises at least one counterweight, and the specific end engagement of this counterweight and key, and the specific end of key forms the part of keyboard instrument.Because the miscellaneous part of keyboard instrument part is connected with other end positions of key, a spot correlation of this end sections and key actuating mechanism, human player are exerted pressure in specific end and are resisted the weight of miscellaneous part part.Counterweight is partly eliminated because the weight of miscellaneous part part is applied to the load on this key, thereby makes human player think that this key is not too heavy.
Each counterweight comprises a plurality of, and these pieces are made by the metal beyond the deleading, that is, non-lead metal, alloy, comprise the synthetic resin of metal or comprise the synthetic resin of aluminium.The material that it is desirable to very much these kinds has very big rate of specific gravity, because they can make that counterweight is small-sized.In addition, a plurality of material is a plastically deformable under relatively little power effect.At least one of be out of shape under very little power effect a plurality of is to be made by plastic deformable material.This power is applied to by the instrument of people or people control on a plurality of of each counterweight, and causes at least one distortion in a plurality of.Yet, do not wish that other pieces of being deformed or a plurality of can be made by hard metal.Under situation about being deformed, make by plastic deformable material more than a piece more than a piece.Under the situation that only has a piece to be deformed, counterweight further comprises connector, and a plurality of connectors are connected to each other by the mode of connector.
These keys are made by the plastic deformable material of for example wood or synthetic resin.Each counterweight all with the engagement of following key.The worker puts into counterweight or a plurality of in hole or the depression, and in such a way power is applied to a plurality of and goes up so that at least one piece or be expressed on the relative piece more than a piece.In part of this distortion or a plurality of periphery that is partially embedded into the key that defines hole or depression and spaced apart with the opening of this hole or depression.Therefore, distortion part or a plurality of part make this counterweight and key mesh.
Get deeply stuck in hole or the depression because this crushed element is embedded into periphery, so this crushed element is not subjected to the influence of external environment condition, and keeps counterweight to mesh with key reliably.Therefore, this counterweight is durable.
Because therefore other pieces or a plurality of distortion that power are sent to and cause at least one piece do not need specific instrument for key balancer.For this reason, counterweight is economical, and makes production cost reduce.
At key is under the situation about being made by timber, and the texture of timber extends at the longitudinal direction that is parallel to key, and the hole is open towards a side or a plurality of side of key.When having a piece distortion at least in the hole when, the part of this distortion is embedded in the key with the direction perpendicular to the grain of wood.For this reason, this key is not easy fracture.
In the following description, term " preceding " indicates the more approaching position that is sitting in the player who plays on the stool, position that limits than term " back ".Line between front position and position, corresponding back is gone up at " longitudinal direction " and is extended, and this longitudinal direction met at right angle with " laterally "." vertical direction " is perpendicular to the plane that is limited by longitudinal direction and horizontal direction.
First embodiment
First example
With reference to the accompanying drawings 1, the white key 10 that forms the acoustic piano keyboard with other the white keys and the black key of both sides dotted line indication mainly comprises rod 11, key balancer 10a and key cover plate 10b.Rod 11 has rectangular haply parallelepiped structure, and key cover plate 10b adheres to the front portion of rod 11.Though wooden texture rod 11 vertically on extend, wooden texture to show in Fig. 1.As known in those skilled in the art, the equilibrium orbit (not shown) supports this white key 10 and other black/white keys in such a way, and promptly black key and Bai Jian locate up and down on the balance guide rail independently of one another.
Though do not show in the accompanying drawings, provide motor unit at the rear portion of white key 10, and this motor unit is connected with the rear portion of white key 10.Motor unit supports relevant hammer, and the general assembly (TW) of motor unit and hammer all is applied to the rear portion of Bai Jian 10 as the load of resisting bond motion like this.Key balancer 10a is embedded into the front portion of rod 11, and partly eliminates the load that hinders key motion.
Each counterweight 20 comprises deformable block 21, tool block 22 and connector 10c, and this deformable block 21 is to keep supporting engagement with tool block 22 by the connector 10c mode among the through hole 11a/11b as shown in Figure 2.This deformable block 21 has flange 25, and this tool block 22 is formed with shoulder 27.In the time of deformable block 21 and tool block 22 supporting engagements, shoulder 27 makes flange 25 be embedded in the rod 11.
Fig. 3 has shown the counterweight that is inserted into before the through hole 11a/11b.This deformable block 21 is generally disc.Though deformable block 21 is divided into bottom 23, central protuberance 24 and flange 25, these parts 23,24 and 25 form an one-piece construction, and this will see in Fig. 4 better.Bottom 23 has circular end surface.
Projection around this flange 25 circular end surface of 23 from the bottom, thus between central protuberance 24 and flange 25, produced annular bottom surface 23a.Yet, any flange all be from other end faces 23b around the projection.Breach 25a is divided into four parts with flange 25.In this embodiment, each breach 25a all with adjacent breach 25a be separated by 90 the degree, therefore, flange 25 is divided into four parts.Central protuberance 24 has end face 24b, and this end face 24b and annular end face 23a be a distance at interval, and this distance is bigger than the end face 25b and the distance between the annular end face 23a of flange 25.
In the middle of cardiac prominence play 24 when bottom surface 26b advances, shoulder 27 at first contacts with flange 25, and shoulder 27 causes that four parts of flange 25 outwards are out of shape.Breach 25a allows shoulder 27 to cause the distortion of four parts easily.Being partially embedded in the rod 11 of this distortion, and securely counterweight is remained among the through hole 11a/11b.
Suppose that the counterweight 20 that will show among Fig. 6 A distributes to through hole 11a.As shown in Figure 6A, at first, the worker is towards cylindrical recesses 26 direction center projectioies 24, and central protuberance 24 is aimed at cylindrical recesses 26.
Then, shown in Fig. 6 B, the worker applies power on end face 22b and 23b, therefore central protuberance 24 is pressed in the cylindrical recesses 26 simplely.In this case, shoulder 27 does not begin to make flange 25 distortion.
Shown in Fig. 6 C, the worker is inserted into deformable and tool block 22/23 among the through hole 11a.The worker is applied to power on end face 22b and the 23b, so shoulder 27 contacts with the each several part of flange 25.Shoulder 27 converts power to the power of radial component and the power of axial component.The power of radial component makes the each several part of flange 25 be out of shape in the radial direction, and the power of axial direction makes central protuberance 24 be inserted into dearly in the cylindrical recesses 26.The crushed element of flange 25 is embedded in the inner surface portion of rod 11, and central protuberance 24 contacts with bottom surface 26b.The flange 25 of this distortion stops counterweight 20 to drop, and closely cooperating between central protuberance 24 and cylindrical recesses 26 do not allow deformable block 21 and tool block 22 to be separated from each other.
The worker can be applied to power on end face 22b and the 23b by punch press and punch die.It is desirable to very much punch press and be formed with flat tip electrode, by this flat tip electrode, this power is applied on deformable block 21 or the tool block 22, and that is because be along the direction that is parallel to the central shaft of deformable block and tool block 21/22, and this power is applied on end face 22b or the 23b.
As understanding from aforementioned content, the flange 25 of distortion is embedded in the wood between the side surface of rod 11, and because the flange 25 of distortion is to be embedded in the rod 11 along the direction perpendicular to wood texture, so it is difficult for making rod 11 fractures.Like this, key balancer 10a according to the present invention makes that white key 10 is very durable.
Deformable block plays the effect of partly offsetting key motion as the instrument that makes flange 25 distortion and as counterweight.Without any need for particular tool, so key balancer 10a is economical for key balancer 10a.
Even owing to the reason rod 11 of humidity can shrink and expand, the flange 25 of distortion can not decontroled from rod 11 yet, this is because the flange 25 of distortion embeds rod 11 in the inside of through hole 11a/11b.In other words, timber is around the flange 25 of distortion, thereby prevention counterweight 20 falls down.Therefore, key balancer 10a according to the present invention is reliable.
And central protuberance 24 has plane 24a, so air hole is formed on plane 24a and limits between the inside surface of cylindrical recesses 26, so central protuberance 24 cooperates cylindrical recesses 26 glossily.
Second example
Forward Fig. 7 to, counterweight 30 is as a part that embodies another key balancer of the present invention.Counterweight 30 and the rod engagement that is similar to rod 11, and partly eliminate the load that resisting bond is moved.For this reason, also represent, and the through hole of distributing to counterweight 30 is represented with Reference numeral 11a with Reference numeral 11 with the rod of counterweight 30 engagement.
Then, shown in Figure 10 A, the deformable block 31 that the worker will assemble tool block 32 is inserted among the through hole 11a.
At last, the worker is applied to power F on deformable block 31 and the tool block 32.The worker can apply power F by the mode of punch press and punch die.The punch press and the punch die that are used for deformable block and tool block 21 and 22 are suitable for for counterweight 30. Flange 35 and 38 outwards is out of shape, and because slope 35a and 38a extend internally, flange 35 and 38 and rod 11 interlocks.In other words, flange 35 and 38 has finely been resisted inside radial force component.Flange 35 and 38 outwards is out of shape, and the ridge 35b of distortion and 38b securely with rod 11 engagement.In the middle of cardiac prominence play 34 when advancing towards the bottom of cylindrical recesses 37, clearance fit allows air to discharge from cylindrical recesses 37.The flange 38 of this distortion keeps this tool block 32 to contact with deformable block 31.Therefore flange 38 plays the effect of connector 30c.
As will be appreciated that, counterweight 30 is realized all advantages of the present invention.
The 3rd example
Forward accompanying drawing 11 to, counterweight 40 is as a part that embodies another key balancer of the present invention.Counterweight 40 and the rod engagement that is similar to rod 11, and partly offset the load that resisting bond is moved.
Counterweight 40 comprises deformable block 41, tool block 42 and connector 40c, and except flange 45/48 and corresponding annular surface 43a/46a, deformable block 41 and tool block 42 are similar to deformable block 31 and tool block 32.For this reason, under the condition that is not elaborated, other part is identified by the Reference numeral of the appropriate section that indicates deformable block and tool block 31/32.
Flange 45/48 is being constant on the width of end face 45a and 48a.In other words, flange 45/48 has the square-section.Flange 48 plays the effect of connector 40c.Because manufacture process is simpler than the manufacturing process of counterweight 30, so this feature is desirable for manufacturer.Counterweight 40 is similar to counterweight 30 and rod engagement.
At work, when the worker applied power F on deformable block and tool block 41 and 42 when, flange 45 and 48 was squeezed so that projection.Therefore, the flange 45 and 48 of distortion is snapped in the rod.The flange 48 of this distortion keeps tool block 42 to contact with deformable block 41.Therefore flange 48 plays the effect of connector 40c.Counterweight 40 is realized all advantages of counterweight 20.
The 4th example
Figure 12 has shown the counterweight 50 as a part that embodies another key balancer of the present invention.Counterweight 50 and the rod engagement that is similar to rod 11, and partly offset the load that resisting bond is moved.
Counterweight 50 comprises deformable block 51, tool block 52 and connector 50c, and except flange 55/58 and corresponding annular surface 53a/56a, deformable block 51 and tool block 52 are similar to deformable block 31 and tool block 32.For this reason, under the condition that is not elaborated, miscellaneous part is identified by the Reference numeral that indicates deformable block and tool block 31/32 appropriate section.
Flange 55 is made of six barrier 55a.Barrier 55a is 33 equally spaced each other interval, periphery along the bottom, and each of six surperficial platform part 53b is created between the adjacent barrier 55a.Surface platform part 53b has outward-dipping end face respectively, and plays the effect of extruder 53.Surface platform part 53b is from barrier 55a indentation.
Similarly, flange 58 is made of six barrier 58a, and six barrier 58a along the bottom 36 equally spaced each other interval, periphery.Six surperficial platform part 57a are created between the adjacent barrier 58a each, and play the effect of extruder 57.Surface platform part 57a has outside end face respectively.Surface platform part 57a is from barrier 58a indentation.
Barrier 55a has the little arc length degree of arc length degree of specific surface platform part 57a.Similarly, barrier 58a has the little arc length degree of arc length degree of specific surface platform part 53a.The degree of depth of surface platform part 53b is approximately equal to the degree of depth of surperficial platform part 57a.Yet the degree of depth of cylindrical recesses 37 is greater than the degree of depth of surperficial platform part 53b and 57a.
Counterweight 50 as described below and rod engagements.At first, the worker aims at central protuberance 34 with cylindrical recesses 37, and respectively barrier 55a and surperficial platform part 53b is aimed at surperficial platform part 57a and barrier 58a.The worker is inserted into central protuberance 34 in the cylindrical recesses 37, and barrier 55a and barrier 58a cross one another.
The deformable block 51 that the worker will assemble tool block 52 is inserted in the through hole, and power is applied on deformable block 51 and the tool block 52 along the direction identical with power F.Barrier 55a and 58a are out of shape on surperficial platform part 53b and 57a, and barrier 55a and the 58a and the rod interlock of distortion.Barrier 55a is along the direction distortion opposite with barrier 58a deformation direction.For this reason, counterweight 50 meshes with rod securely, and is difficult to separate from rod.Thereby the flange of this distortion 58 keeps this tool block 52 to contact the effect of playing connector 50c with deformable block 51.Counterweight 50 is realized all advantages of counterweight 20.
Barrier 55a can be relative with barrier 58a.In this embodiment, barrier 55a and 58a make another barrier 58a and 55a distortion.
The 5th example
Figure 13 has shown half as the counterweight of a part that embodies another key balancer of the present invention.Pair of block 60 is as the rod engagement of counterweight and black/white key.
Piece 60 is similar to deformable block 31.Similar is protruding from the periphery of the bottom 63 of piece 60 in the flange 65 of flange 35.Yet, without any central protuberance from the bottom 63 projectioies.Circular end surface 63a is flange 65 inner extensions.An effect of playing deformable block in the piece 60, and other pieces 60 play the effect of tool block.The flange 65 of other pieces 60 plays the effect of connector 60c.
Counterweight is as described below to be meshed with rod.At first, the worker aims at piece 60 with the opening of the through hole that is exposed to the rod side surface, and in such a way piece 60 is inserted in the through hole, promptly allows flange 65 in through hole inside toward each other.
Then, worker's pushing block 60 is till flange 65 contacts with each other.When flange 65 contacted with each other, the worker applied power to piece 60.Flange 65 outwards is out of shape, and with the rod interlock.The punch press and the punch die that are used for counterweight 20 are suitable for for piece 60.
Counterweight or pair of block 60 can realize all advantages of counterweight 20.In addition, piece 60 variable ratio shape pieces 31 and tool block 32 are simple.For this reason, the production cost of piece 60 is lower than the production cost of counterweight 30.
After being assembled together each other, pair of block 60 can be inserted into the through hole from one of opening.
The 6th example
Figure 14 has shown half as the counterweight 70 of a part that embodies another key balancer of the present invention.Pair of block 70 is as the rod engagement of counterweight and black/white key.
Piece 70 is similar to deformable block 41.Similar is protruded from the periphery of the bottom 73 of piece 70 in the flange 75 of flange 45.Yet, 73 protrude from the bottom without any central protuberance.Circular end surface 73a is flange 75 inner extensions.One of piece 70 and other pieces 70 play the effect of deformable block and tool block, and the flange 75 of other pieces 70 plays the effect of connector 70c.
Counterweight is as described below to be meshed with rod.At first, the worker aims at piece 70 respectively with the opening of the through hole of the side that is exposed to rod, and in such a way piece 70 is inserted in the through hole, promptly allows flange 75 in through hole inside toward each other.
Then, worker's pushing block 70 contacts with each other up to flange 75.When flange 75 contacted with each other, the worker applied power to piece 70.Flange 75 protrudes, and meshes with rod.The punch press and the punch die that are used for counterweight 20 are suitable for for piece 70.
Counterweight or pair of block 70 realize all advantages of counterweight 20.In addition, piece 70 variable ratio shape pieces 41 and tool block 42 are simple.For this reason, the production cost of piece 70 is lower than the production cost of counterweight 40.
After they were assembled together each other, pair of block 70 can be inserted into the through hole from one of opening.
The 7th example
Figure 15 has shown half as the counterweight 80 of a part that embodies another key balancer of the present invention.Pair of block 80 is as the rod engagement of counterweight and black/white key.
Piece 80 is similar to deformable block 41.The barrier that forms flange 85 protrudes from the periphery of the bottom 83 of piece 80, and forms the barrier indentation of the surperficial platform part of extruder 83b from flange 85.Yet, without any central protuberance 83 protrude from the bottom.Circular end surface 83a is flange 85 inner extensions.One of piece 80 and other pieces 80 play the effect of deformable block and tool block respectively, and the flange 85 of other pieces 80 plays the effect of connector 80c.
Counterweight or pair of block 80 as described below and rod engagements.At first, the worker keeps flange 85 to contact with extruder 83b, then this is inserted in the through hole of rod piece 80.
Then, the worker is applied to power on the piece 80, outwards is out of shape to cause flange 85.As a result, the flange 85 and rod interlock of distortion.Therefore this closely meshes with rod piece 80.
Therefore, counterweight or pair of block 80 have realized all advantages of counterweight 20, and its production cost is even lower than counterweight 50.Piece 80 can contact with each other in through hole.
Improve
Copper is not made any qualification to technical scope of the present invention.Counterweight 20,30,40,50,60,70 and 80 can be made with aldary, iron, brass or the synthetic resin that comprises metal.Under the situation that counterweight 20 to 80 is made by the synthetic resin that comprises metal, it is preferable that tungsten powder is mixed into synthetic resin.Any metal or alloy all are suitable for for counterweight.Yet, consider to use lead from the angle of environmental pollution.
Round section is not made any qualification to technical scope of the present invention.Counterweight 20-80 and through hole 11a/11b can have triangular-section, square-section, polygonal cross-section or elliptic cross-section.
Central protuberance and cylindrical recesses can have triangular-section, square-section, polygonal cross-section or elliptic cross-section.
Crack or a plurality of crack can be formed among each barrier 55a or 85, therefore make barrier 55a or 85 be easy to distortion.
Second embodiment
First example
Figure 16 has shown the white key 110 that embeds acoustic piano.This white key 110 comprises rod 11, key balancer 110a and key cover plate 110b.Rod 11 has longitudinal direction and is formed with two through hole 11a and 11b towards two lateral openings of rod 11 thereon.Through hole 11a and 11b have round section.Key cover plate 11b adheres to the front portion of the rod 11 that is similar to Bai Jian 11.Key balancer 110a is realized that by a pair of counterweight 120 this counterweight 120 is at through hole 11a and 11b is inner and rod 11 engagements.
Each counterweight 120 comprises projection 121 and recessed 122 as shown in figure 17, and projection 121 remains in the through hole 11a/11b and recessed 122 engagement.Because therefore projection 121 and recessed 122 partly distortion are snapped in the rod 11.
Usually also have disc for recessed 122, and heart zone is formed with cylindrical recesses 127 therein.Recessed 122 diameter is the diameter of projection 121 no better than, and the degree of depth of cylindrical recesses 127 is equal to, or greater than the degree of depth of central protuberance 124.Central protuberance 124 adapts to cylindrical recesses 127 with clearance fit, therefore central protuberance 124 is inserted in the cylindrical recesses 127 during, air is discharged by central protuberance 124 and the gap that limits between the inside surface of cylindrical recesses 127 from cylindrical recesses 127.
Then, shown in Figure 20 A, the projection 121 that the worker will assemble recessed 122 is inserted among the through hole 11a.
At last, the worker applies power F on projection 121 and recessed 122.The worker can produce power F by the mode of punch press and punch die.The punch press and the punch die that are used for projection and recessed 21 and 22 are suitable for for counterweight 120.Shown in Figure 20 B, flange 125 and 128 outwards is out of shape, and because inclined-plane 125a and 128a extend internally so flange and rod 11 interlocks.In other words, flange 125 and 128 fully stops the radial force component of direction inwardly.Flange 125 and 128 outwards is out of shape, and the ridge 125b of distortion and 128b closely with rod 11 engagement.Therefore, projection 121 and recessed 122 effect of playing the instrument that is used for other pieces 122 and 121.In the middle of cardiac prominence play 124 when advancing towards the bottom of cylindrical recesses 127, clearance fit allows air to discharge from cylindrical recesses 127.
Just as will be understood, the flange 125 of distortion and 128 is difficult for breaking with rod 11 interlocks so that rod 11 along the direction perpendicular to the grain of wood.Therefore, key balancer 110a makes white key 110 break.
Even rod 11 is owing to pucker ﹠ bloat can appear in the reason that humidity changes, counterweight 120 can not drop out yet, and this is because whole ridge 125b and 128b have been embedded in the timber.The reason that another one counterweight 120 can not drop out is that the flange 125 and 128 the diameter of distortion is bigger than the diameter of through hole 11a and 11b.Therefore counterweight 120 is durable.
The worker only wishes power F is applied on projection and recessed 121 and 122.The punch press of standard and punch die are suitable for for counterweight 120.In other words, for assembly work without any need for special instrument.The production cost of therefore white key 110 is lower than the production cost of key of the prior art.
Clearance fit allows air to discharge from cylindrical recesses 127.For counterweight without any need for pore.This just causes the reduction of cost.
Second example
Forward accompanying drawing 21 to, counterweight 130 is as a part that embodies another key balancer of the present invention.This counterweight 130 is meshed with the rod that is similar to rod 11, and partly eliminates the load of resisting bond motion.
Width towards the flange 135/138 of end face 135a and 138a is constant.In other words, flange 135/138 has the square-section.Because manufacture process is simpler than the manufacture process of counterweight 120, so this feature is wished for the fabricator.Counterweight 130 is similar to counterweight 120 and is meshed with rod.
At work, when the worker applies power F on projection and recessed 131 and 132 when, be expressed on another flange 138 and 135 flange 135 and 138 so that projection.Therefore the flange 135 of distortion and 138 and the rod interlock.Counterweight 130 is realized all advantages of counterweight 130.
The 3rd example
Figure 22 has shown the counterweight 140 as a part that embodies another key balancer of the present invention.This counterweight 140 and the rod engagement that is similar to rod 11, and partly eliminate the load that resisting bond is moved.
Counterweight 140 comprises projection 141 and recessed 142, and except flange 145/148 and corresponding annular surface 143a/146a, and projection 141 and recessed 142 are similar to projection 121 and recessed 122.For this reason, under the condition that describes in detail, other part is identified by the Reference numeral of the appropriate section of specifying projection and recessed 121/122.
Flange 145 is made of six barrier 145a.This barrier 145a is 123 equally spaced each other interval, periphery along the bottom, and among six surperficial platform part 143b each is created between the adjacent barrier 145a.In other words, barrier 145a and surperficial platform part 143b replace mutually.Surface platform part 143b has outward-dipping end face separately, and plays the effect of extruder 143.Surface platform part 143b is from barrier 145a indentation.
Similarly, flange 148 is made of six barrier 148a, and six barrier 148a along the bottom 126 periphery equally spaced each other spaced apart.Among six surperficial platform part 147a each is created between the adjacent barrier 148a, and plays the effect of extruder 147.In other words, barrier 148a and surperficial platform part 147a alternate.Surface platform part 147a has outward-dipping end face respectively.Surface platform part 147a is from barrier 148a indentation.
Barrier 145a has the arc length of specific surface platform part 147a and wants little arc length.Similarly, the arc length of barrier 148a with specific surface platform part 143a wanted little arc length.The degree of depth of surface platform part 143b is approximately equal to the degree of depth of surperficial platform part 147a.Yet the depth ratio surface platform part 143b of cylindrical recesses 127 and the degree of depth of 147a want big.
Counterweight 140 is as described below to be meshed with rod.At first, the worker aims at central protuberance 124 with cylindrical recesses 127, and barrier 145a and surperficial platform part 143b are aimed at surperficial platform part 147a and barrier 148a respectively.The worker is inserted into central protuberance 124 in the cylindrical recesses 127, and barrier 145a and barrier 148a cross one another.
The worker will be equipped with recessed 142 projection 141 and be inserted in the through hole, and along the direction identical with power F projection 141 and recessed 142 be applied power.Barrier 145a and 148a are out of shape on surperficial platform part 143b and 147a, and the barrier 145a and the 148a of distortion are snapped in the rod.Barrier 145a is along the direction distortion opposite with barrier 148a deformation direction.Owing to this reason, counterweight 140 closely meshes with rod, and is difficult to break away from from rod.This counterweight 140 can be realized all advantages of counterweight 120.
Barrier 145a can be relative with barrier 148a.In this embodiment, barrier 145a and 148a make another barrier 148a and 145a be out of shape.
The 4th example
Figure 23 has shown half as the counterweight of a part that embodies another key balancer of the present invention.Pair of block 150 is as the rod engagement of counterweight and black/white key.
Counterweight is as described below to be meshed with rod.At first, the worker aims at piece 150 with the opening of the through hole that is exposed to the rod side, and in such a way piece 150 is inserted in the through hole, promptly allows flange 155 in through hole inside toward each other.
Then, worker's pushing block 150 contacts with each other up to flange 155.When flange 155 contacted with each other, the worker was applied to power on the piece 150.Flange 165 outwards is out of shape, and with the rod interlock.The punch press and the punch die that are suitable for counterweight 120 are suitable for piece 150.
Counterweight or pair of block 150 realize all advantages of counterweight 120.In addition, piece 150 is simpler than projection 121 and recessed 122.For this reason, the production cost of piece 150 is lower than the production cost of counterweight 120.
Pair of block 150 can be inserted into the through hole from one of opening after assembled with each other.
The 5th example
Figure 24 has shown half as the counterweight 160 of a part that embodies another key balancer of the present invention.Pair of block 160 is meshed as the rod of counterweight with the black/white key.
Piece 160 is similar to projection 131.Similar is protruded from the periphery of the bottom 163 of piece 160 in the flange 165 of flange 135.Yet, 163 protrude from the bottom without any central protuberance.Circular end surface 163a extends in the inside of flange 165.
Counterweight is as described below to be meshed with rod.At first, the worker aims at piece 160 respectively with the opening of the through hole that is exposed to the rod side, and in such a way piece 160 is inserted in the through hole, promptly allows flange 165 in through hole inside toward each other.
Then, worker's pushing block 160 contacts with each other up to flange 165.When flange 165 contacted with each other, the worker applied power on piece 160.Flange 165 projectioies, and with the rod interlock.The punch press and the punch die that are applicable to counterweight 120 are suitable for for piece 160.
Counterweight or pair of block 160 realize all advantages of counterweight 120.In addition, piece 160 is simpler than projection 131 and recessed 132.For this reason, the production cost of piece 160 is lower than the production cost of counterweight 130.
Pair of block 160 can be inserted into the through hole from one of opening after being assembled together each other.
The 6th example
Figure 25 has shown half as the counterweight 170 of a part that embodies another key balancer of the present invention.Pair of block 170 is as the rod engagement of counterweight and black/white key.
Counterweight or pair of block 170 as described below and rod engagements.At first, the worker keeps flange 175 to contact with extruder 173b, and this is inserted in the through hole of rod piece 170.
Then, the worker is applied on the piece 170 power so that flange 175 outwards is out of shape.As a result, the flange 175 of distortion and rod engagement.Therefore, this closely is engaged to rod piece 170.
Therefore, counterweight or pair of block 170 realize all advantages of counterweight 120, and its production cost is more lower than counterweight 140.This piece 170 can contact with each other in through hole.
Though illustrated and described specific embodiment of the present invention, it all is conspicuous carrying out variations and modifications to those skilled in the art obviously under the condition that does not break away from the spirit and scope of the present invention.
For example, all modifications of first embodiment all is applicable to second embodiment.
Key balancer of the present invention can be by realizing more than two counterweights.Under the situation that counterweight is realized by three pieces, flange is formed on and is clipped in the middle piece of other pieces.When the worker was applied to power on other pieces, flange was squeezed on other pieces, and with the rod interlock.
The term of the claim ingredient with embodiment as described below is relevant.Rod 11 is corresponding to " key ", and through hole 11a or 11b play the effect of " hollow space ".Deformable block 21,31,41,51,60,70 or 80 and tool block 22,32,42,52,60,70 or 80 whole formations " a plurality of ", and projection 121,131,141,150,160 or 170 and recessed 122,132,142,150,160 or 170 also constitute " a plurality of " as a whole.
Claims (21)
1, a kind of key balancer that is used for being installed in the key (11) of musical instrument comprises that at least one is installed in the counterweight (20 in the hollow space (11a/11b) that forms on the described key; 30; 40; 50; 60; 70; 80; 120; 130; 140; 150; 160; 170), it is characterized in that
Described at least one counterweight comprises plural balancing weight (21/22; 31/32; 41/42; 51/52; 60; 70; 80; 121/122; 131/132; 141/142; 150; 160; 170), described balancing weight local deformation is so that the privileged site of the isolated described key in duct (11) of embedding and described hollow space (11a/11b).
2, key balancer as claimed in claim 1, wherein said at least one counterweight further comprises connector, this connector keeps described a plurality of (21/22; 31/32; 41/42; 51/52; 60; 70; 80) be connected with described hollow space (11a/11b).
3, key balancer as claimed in claim 2, in wherein said a plurality of one (21; 31; 41; 51; 60; 70; 80) has the deformable segment (25 of distortion; 35; 45; 55; 65; 75; 80c) so that described deformable segment (25; 35; 45; 55; 65; 75; 80c) with described determining section interlock.
4, key balancer as claimed in claim 3, in wherein said a plurality of another (22; 38; 48; 50c; 65; 75; 80) with described a plurality of in described one (21; 31; 41; 51; 60; 70; 80) described deformable segment (25; 35; 45; 55; 65; 75; 80c) relative, therefore make described deformable segment (25; 35; 45; 55; 65; 75; 80c) with described determining section interlock.
5, key balancer as claimed in claim 4, its protrusions (24) and depression (26) are respectively formed in described another (22) among described one (21) in described a plurality of and described a plurality of, and described depression (26) is suitable for holding described projection (24) in close-fitting mode.
6, key balancer as claimed in claim 5 forms air hole between the inside surface of the peripheral surface of wherein said projection (24) and the described depression of qualification (26), so that can discharge air by described air hole during assembly work.
7, key balancer as claimed in claim 4, wherein the flange (25) by projection on the end face of described one remainder (23) from described a plurality of (21) forms described crushed element, and described another (22) in described a plurality of are formed with the shoulder (27) relative with described flange (25), and described like this shoulder (27) makes described flange (25) outwards be out of shape.
8, key balancer as claimed in claim 3, wherein said a plurality of another (32; 42; 52; 60; 70; 80) has deformable segment (38; 48; 58; 65; 75; 80c), described deformable segment is out of shape in such a way, promptly allow described described another (32; 42; 52; 60; 70; 80) described deformable segment (38; 48; 58; 65; 75; 80c) be snapped to and described a plurality of described one (31; 41; 51; 60; 70; 80) described deformable segment (35; 45; 55; 65; 75; 80c) described specific part together, and described a plurality of described another (32; 42; 52; 60; 70; 80) described deformable segment (38; 48; 58; 65; 75; 80c) play the effect of described connector.
9, key balancer as claimed in claim 8, wherein said a plurality of described one (31; 41; 51; 60; 70; 80) described deformable segment (35; 45; 55; 65; 75; 80c) with described a plurality of described another (32; 42; 52; 60; 70; 80) described deformable segment (38; 48; 58; 65; 75; 80c) pass through respectively from described a plurality of described one remainder (33; 63; 73; The flange of end face projection 84) and from described a plurality of described another remainder (36; 63; 73; The flange of end face projection 83) forms, and described flange is out of shape each other so that with described specific part interlock.
10, key balancer as claimed in claim 9, wherein said flange (35/38; 65) have right triangular cross-sectional, and the hypotenuse of described right triangular cross-sectional inwardly points to, so that described flange (35/38; 65) outwards distortion.
11, key balancer as claimed in claim 9, wherein said flange (45/48; 75) have the square-section, like this when being out of shape each other, described flange protrusions.
12, key balancer as claimed in claim 9, wherein each described flange (55/58; 80c) have barrier (55a/58a) and the surperficial platform part (53b/57a) that replaces each other, and described surperficial platform part (53b/57a) has outward-dipping surface, and therefore described barrier (55a/58a) is gone up outwards distortion in described surperficial platform part (53b/57a).
13, key balancer as claimed in claim 8 wherein in order to make described deformable segment and described determining section interlock, is described a plurality of described one (31; 41; 51) and described a plurality of described another (32; 42; 52) provide guide piece (34/37), so that described deformable segment (35/38; 45/48; 55/58) pushes down each other.
14, key balancer as claimed in claim 13, wherein said guide piece is the projection (34) protruded by described one remainder (33) from described a plurality of and depression (37) formation that forms in described a plurality of described another remainder (36), and described depression is suitable for holding described projection in the mode of clearance fit.
15, key balancer as claimed in claim 1, wherein said a plurality of one (121; 131; 141; 150; 160; 170) and described a plurality of another (122; 132; 142; 150; 160; 170) has deformable segment (125 respectively; 135; 145; 155; 165; 175) and deformable segment (128; 138; 148; 155; 165; 175), and described deformable segment (125; 135; 145; 155; 165; 175; 128; 138; 148; 155; 165; 175) with the described specific part interlock of described key.
16, key balancer as claimed in claim 15, wherein said deformable segment is by the peripheral protruding flange (125 from described a plurality of described one remainder; 135; 145; 155; 165; 175) and from described a plurality of described another the flange (128 of peripheral projection of remainder; 138; 148; 155; 165; 175) form, and described flange (125; 135; 145; 155; 165; 175; 128; 138; 148; 155; 165; 175) make each other distortion, therefore with the described specific part interlock of described key.
17, key balancer as claimed in claim 16, wherein said flange (125/128; 155) have right triangular cross-sectional, and the hypotenuse of described right triangular cross-sectional points to inwardly, therefore described flange outwards is out of shape.
18, key balancer as claimed in claim 16, wherein said flange (135/138; 165) have the square-section, therefore when being out of shape each other, can protrude.
19, key balancer as claimed in claim 16, wherein each described flange (145/148; 175) have barrier interlaced with each other (145a/148a) and surperficial platform part (143b/147a), described surperficial platform partly has outward-dipping surface, therefore described barrier outwards distortion on described surperficial platform part.
20, key balancer as claimed in claim 16, wherein in order to make described deformable segment and described specific part interlock, for described a plurality of described one and described a plurality of described another are provided with guide piece (124/127), so that described deformable segment is pushed down each other.
21, key balancer as claimed in claim 20, wherein said guide piece is to form by projection of protruding from described a plurality of described one remainder (124) and the depression (127) that forms described a plurality of described another remainder, and described depression is suitable for holding described projection in the mode of clearance fit.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP293059/04 | 2004-10-05 | ||
| JP293061/04 | 2004-10-05 | ||
| JP2004293059A JP4651350B2 (en) | 2004-10-05 | 2004-10-05 | Key weight |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1758328A true CN1758328A (en) | 2006-04-12 |
| CN100593189C CN100593189C (en) | 2010-03-03 |
Family
ID=36376185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510116523A Expired - Fee Related CN100593189C (en) | 2004-10-05 | 2005-10-08 | Key balancer built-in hole of key |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4651350B2 (en) |
| CN (1) | CN100593189C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110447064A (en) * | 2017-03-23 | 2019-11-12 | 雅马哈株式会社 | The manufacturing method of key hammer, key unit, key unit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3929662B2 (en) * | 1999-11-18 | 2007-06-13 | 株式会社河合楽器製作所 | keyboard |
| JP2003122344A (en) * | 2001-10-09 | 2003-04-25 | Kawai Musical Instr Mfg Co Ltd | Keyboard |
| JP2003177740A (en) * | 2001-12-12 | 2003-06-27 | Kawai Musical Instr Mfg Co Ltd | Keyboard weight |
| JP2006003375A (en) * | 2004-05-18 | 2006-01-05 | Daisee Kogyo Kk | Lead substitutive weight mounting structure and lead-free alternative weight |
-
2004
- 2004-10-05 JP JP2004293059A patent/JP4651350B2/en not_active Expired - Fee Related
-
2005
- 2005-10-08 CN CN200510116523A patent/CN100593189C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110447064A (en) * | 2017-03-23 | 2019-11-12 | 雅马哈株式会社 | The manufacturing method of key hammer, key unit, key unit |
| CN110447064B (en) * | 2017-03-23 | 2023-09-12 | 雅马哈株式会社 | Piano key hammer, key unit and method for manufacturing key unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4651350B2 (en) | 2011-03-16 |
| CN100593189C (en) | 2010-03-03 |
| JP2006106367A (en) | 2006-04-20 |
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