CN101515450B - Key structure and keyboard apparatus - Google Patents

Abstract

A key structure which is capable of giving a woody appearance to the key, and increasing the freedom of mounting at least one functional part formed as a separate part from the key structure, while maintaining excellent machinability. An upper plate has an increased width part corresponding to an end of a white key toward a player. In the key structure, a wood part is secured to the lower surface of at least the increased width part of the upper plate, and has an increased width part having substantially the same width as the increased width part of the upper plate. The key structure is mountable in a keyboard apparatus, for functioning as a white key pivotally moved by key-depressing operation. A recess is formed in a part of the wood part including the increased width part, which opens downward and has a width (W0) not less than 50 % and not more than 80 % of the width (B0) of the increased width part of the wood part.

Description

Key structure and key board unit

The application be application artificial " Yamaha Corporation ", the applying date are that September 10, application number in 2004 are 200410077101.5, denomination of invention divides an application for the application of " key structure and key board unit ".

Technical field

The present invention relates to a kind of key structure that is applied to have the key of xylem; With the key board unit that comprises this key structure.

Background technology

Traditionally, as at the registration publication number be disclosed in the Japanese Utility Model of No.2514485 and the Japanese patent application that publication number is No.2903959, key structure is installed on the key board unit, and as a key, under the effect of pushing, can move pivotally, and generally use wooden or materials similar.In this wooden key structure, so-called at least " visible parts " is wooden, should " visible parts " all be visible from the outside when playing and when not playing.Like this, this key structure will present wooden outward appearance, and therefore has high-quality apperance.

Yet this traditional key structure has following problem:

(1) be used to realize each key key operation functional part (for example, the key returning spring, the bond switching actuated piece, the key keeper), with the functional part that is used for key and hammer are pressed to the pivot that is associated with it respectively, the spring that has S shape during such as side-looking is arranged between the framework of key and key board unit usually.Therefore, in order to arrange these functional parts, must on the direction of approximate vertical, guarantee a certain amount of installing space.

For this purpose, if this key structure is resinous substantially type, just be easy to form complicated shape, thereby also just guarantee the installing space of this functional part easily.Yet wooden key structure for example, forms by the excision solid wood normally by the profile that is processed to form.Therefore be not easy the installing space of assurance function parts.It is necessary to be provided with the space of broad between key and framework, thereby the overall height of this key board unit has uprised, this not only runs in the opposite direction with the demand of minification, and is not inconsistent with the demand that reduces weight, and this is because the amount of useless xylem has increased.

(2) in addition, usually,, be necessary on this key board unit, groove to be set, with ccontaining these functional parts for the functional part such as key guide, sensor and LED that forms discretely with this key structure is set on this key board unit.Especially under the situation of wooden key structure, need on its xylem, form such groove sometimes.Yet, if groove is less, will limit the size and the pattern of the functional part that can install, thereby reduce the degree of freedom of installing.

On the other hand, the key guide needs enough intensity and realizes its function fully, and especially, preferably key structure is designed to make that the width on key direction arranged side by side increases, and the width that is used for the associated recesses of this key guide also needs corresponding increase.

Yet, if it is too big to be formed on the width of the groove on this xylem, the sidewall thickness of this xylem of this key structure, promptly the thickness at the position between this groove and this key side can reduce.If this thickness is reduced to 1mm, in the process of this xylem of processing, must adopt the special processing measure such as additional stiffening plate with the width of adjusting this key, perhaps under the normal processing conditions that is fit to this timber of processing, be difficult to this timber of processing.

In addition, usually,, between this key guide and this groove, can be provided with lubricant usually in order to reduce force of sliding friction.If lubricant directly is coated on the groove that is formed at this xylem, this can cause that not only lubricant enters the problem that xylem makes that xylem fades, and can cause because the dispersion of lubricant and the rotten and problem of ultimate failure.

What (3) illustrate in passing is that in wooden key structure, this xylem is arranged on the upper surface of elongated key matrix, or is arranged on the lower surface of upper plate, and is fixed on key matrix and/or this upper plate by cementing agent.In addition, be arranged on corresponding to the preceding abutting end of this key at preceding neighboring terminal spare (front butt end member) under the situation of front end (towards player's a end) of this key structure, it is contemplated that, should before neighboring terminal spare relatively this upper plate fixing concern setting, or be bonded to by cementing agent on the front end face of this xylem.

Yet the variation of (humidity, temperature, aging etc.) because environmental baseline of this xylem can be expanded, shrinks or is out of shape.Therefore, if this key matrix and this preceding neighboring terminal spare are formed as one each other, perhaps they form chorista, but when this key structure of processing, basically contact with each other, these two parts will be interfered mutually owing to expansion, contraction or the distortion of xylem, and this can reduce fixing between this xylem and this two parts, in the worst case, can break away between them.In addition, in having the key board unit of upper plate, if this xylem is fixed on this upper plate, simultaneously should before neighboring terminal spare with relative this upper plate fixing concern setting, the fixedly meeting between this xylem and this upper plate is owing to expansion, contraction or the distortion of xylem descend.If fixedly having descended between this xylem and this upper plate, key matrix or the preceding neighboring terminal spare, the front end of key will be broken down (faulty).Like this, can not guarantee the needed durability of key.

And usually key board unit is provided with locating part, backstop for example, the endpoint location of pressing with limit key.This locating part preferably is arranged on the position that the front end of each key is in contact with it, so that maximum limit effect to be provided.Yet, if locating part be arranged on the key front end below, and should before neighboring terminal spare be set to contact with this locating part, when carrying out button operation repeatedly, be applied to shearing force between this preceding neighboring terminal spare and this xylem can make this xylem and should before fixedly decline between the neighboring terminal spare.In addition, have at key board unit under the situation of upper plate, if this xylem is fixed on this upper plate, simultaneously should before neighboring terminal spare concerning setting with this upper plate is relatively-stationary, the fixedly meeting between this xylem and this upper plate descends owing to the operation of pressing key repeatedly.Fixedly having descended between this xylem and this upper plate or preceding neighboring terminal spare, the front end of key will break down.Like this, can not guarantee the needed durability of key.On the other hand, if this locating part is arranged on the position near this key rear end, contact to avoid this key and to be somebody's turn to do preceding neighboring terminal spare, because the change of lever ratio, limit function can weaken, and this makes and is difficult to carry out correct spacing operation.

In addition, except providing wooden outward appearance, be provided with the minimizing of zone of this xylem, the material that not only can help conserve expensive, and alleviate the weight of this key self, therefore consider these advantages, consider the relation between this preceding neighboring terminal spare and this xylem when being necessary to design this key structure.

(4) in passing explanation be, known technology also has the such key structure that is applied to key board unit, wherein, timber is used as matrix material, as the matrix material of pushing the surface of this key (on) surface is covered with the material of resin and so on.Yet, although owing to use timber as matrix material, the key structure that is covered with resin and so on material at substrate material surface has texture preferably, and this key structure more is difficult to processing than the key structure based on resin, therefore is difficult to the key structure with low-cost workmanship homogeneous.

(5) in addition, because it is easy to obtain, the wooden key that is used for acoustic piano (acoustic pianos) design at first also is used to make wooden key structure.Key structure comprises not only that usually key is directed to mechanism around the pivot of its rotation with by what the key operation guide was led, also comprise fitting piece (" associated splice part parts " or " key functional part "), be used for driving the associated part such as mass member (mass member) or bond switching; With the fitting piece that is used for engaging with an associated part.Yet, if these fitting pieces make by timber because the limited accuracy of wood working, the machining tolerance that can not have relatively high expectations at its drive division.On the other hand, if this key structure be make by the material of resin and so on, as comprising the integral piece of this pivot and fitting piece, just can not obtain wooden outward appearance, in addition, owing to compare with wooden key, the rigidity of resin key is low, so feel can be adversely affected.

(6) in addition, in such key structure, should " associated splice part parts " and " key functional part " also often be formed on this xylem by the processing xylem, therefore, the design freedom relevant with outward appearance with its function is just very low, machining precision is also very low, and the restriction in a lot of processing is arranged simultaneously.This feasible function that is difficult to realize key with higher precision.

Summary of the invention

First purpose of the present invention provides a kind of key structure, and it can provide wood appearance to key, increases the installation degree of freedom of at least one functional part that forms as the separation member of this key structure, keeps good processibility simultaneously.

Second purpose of the present invention provides a kind of key structure, and it can provide wood appearance to key, and can remain on the lubricant effect of making at least one functional part of sliding motion in the operation of pressing key for a long time.

The 3rd purpose of the present invention provides a kind of key structure, and it can provide wood appearance to key, and the front end that prevents this key guarantees the durability of key thus owing to the change of environmental baseline is broken down.

The 4th purpose of the present invention provides a kind of key structure, and it can provide wood appearance to key, and guarantees the spacing ability of suitable pivoting action, and the front end that prevents this key simultaneously guarantees the durability of key thus owing to the operation of pressing key is broken down.

The 5th purpose of the present invention provides a kind of key structure, and it can provide wood appearance to key, and reduces the use waste of timber, reduces its size and weight thus.

The 6th purpose of the present invention provides a kind of key structure, and it can provide wood appearance to key, and reduction comprises the size and the weight of the key board unit of this key structure.

The 7th purpose of the present invention provides a kind of key structure, and it can provide wood appearance to key with lower cost.

In order to realize first purpose, a first aspect of the present invention provides a kind of key structure that is installed in the key board unit, be used for as a white key of under the operation of pressing key, making pivoting action, comprise: a upper plate (50), have with this white key towards the corresponding broadening portion of player's a end (increassed width part) (50h), this broadening portion has a lower surface; An and xylem (60), be fixed to this lower surface of the portion of broadening at least of this upper plate, this xylem has the broadening portion (60h) with this substantially the same width of broadening portion of this upper plate, this xylem is formed with a groove (121) comprising on the position of this broadening portion, this slot opening downwards and have a following width (W0), this width (W0) be not less than this xylem this broadening portion width (B0) 50%, and be no more than its 80%.

By the structure of first aspect present invention, this xylem is arranged on corresponding to this white key in the broadening portion of player's a end, and key presents wood appearance thus.In addition, the width (W0) that is formed on this groove in the broadening portion of this xylem be not less than this xylem broadening portion width 50%, this makes it can make the functional part such as the key guide be configured to guarantee high rigidity thus as having the width of broadening.This has increased the type scope of the functional part that can install in fact.On the other hand, the width of the groove of formation be no more than this xylem broadening portion width 80%.Therefore, can guarantee the minimum desired thickness of the sidewall of this key, make thus under suitable processing conditions that processing comprises the key structure of this xylem.

In order to realize this second purpose, a second aspect of the present invention provides a kind of key structure that is installed in the key board unit, is used for comprising as a key of making pivoting action under the operation of pressing key: a upper plate, and it has a lower surface; One xylem, it is fixed to this lower surface of this upper plate, and this xylem has the groove (121) that also Open Side Down that is formed at wherein, ccontaining at least one functional part of this groove (75), in the operation of pushing, make sliding motion with respect to this key structure by lubricant at key; And a lubricant separation mechanism pieces (47), be arranged in this groove, be used between this lubricant and this xylem, providing obstruction.

By the structure of the present invention's second method, this xylem offers this key wood appearance.In addition, in the key pressing operation, this functional part is arranged on this lubricant separation mechanism pieces in the groove during by this lubricant and sliding contact, and blocking-up is applied to lubricant and this xylem on this functional part.This has prevented that lubricant from entering this xylem, thus this required greasy property is kept the long time.

In order to realize the 3rd purpose, a third aspect of the present invention provides a kind of key structure (200), be used for as a key of under the operation that key is pushed, making pivoting action, comprise: a key matrix (68), has a top and towards player's a end, described key matrix is made by synthetic resin; One xylem (67) has this top that a front end and described xylem are fixed to this key matrix; With a preceding neighboring terminal spare (81), be fixed to the front end of described xylem, neighboring terminal spare is made by synthetic resin before described, the lower end (81a) of neighboring terminal spare (81) is positioned at the below of the lower surface (67a) of described xylem (67) before described, wherein, between this end of player, be provided with a predetermined gap (CL1) at the described lower end of this preceding neighboring terminal spare and this key matrix along the longitudinal direction of this key matrix.

By the structure of third aspect present invention, this xylem provides wood appearance for this key.In addition, on the longitudinal direction of key matrix, this preceding neighboring terminal spare and this key matrix between player's a end, be provided with a predetermined gap.Therefore, this xylem expands, shrinks owing to the change of environmental baseline and when being out of shape, this preceding neighboring terminal spare can not interfered with this key matrix.This has prevented the deterioration (deterioration) fixed between the neighboring terminal spare and this xylem before this, for example, when this preceding neighboring terminal spare be fixed on this xylem towards player's a end time.In addition, when this upper plate is arranged to: make this xylem be fixed on this upper-part, and should before neighboring terminal spare when being provided with the fixing relation of this upper plate, just can prevent the deterioration of fixing between this xylem and this upper plate.Therefore, can avoid the change owing to environmental baseline, breaking down in the end towards the player of key, guarantees desirable durability thus, and this key provides wood appearance simultaneously.

Preferably, this xylem has towards player's a end (67b), and is somebody's turn to do this end towards the player that preceding neighboring terminal spare is fixed to this xylem.

By the structure of this preferred embodiment, even this xylem expands, shrinks owing to environmental baseline changes or when being out of shape, this preceding neighboring terminal spare also can with this key matrix interference.This has prevented fixing deterioration between this preceding neighboring terminal spare and this xylem.

In order to realize the 4th purpose, a fourth aspect of the present invention provides a kind of key structure (200), is used for comprising: towards player's a end as a key of making pivoting action under the operation of pressing key; One key matrix has a top and towards player's a end, this end has a lower surface (68aa); One xylem is fixed to this top of this key matrix; With a preceding neighboring terminal spare that is formed from a resin, should have a lower end (81a) by preceding neighboring terminal spare, and be fixed to this end of this key structure towards the player, wherein, should extend to, see this preceding neighboring terminal spare and this key matrix position overlapped along this xylem by preceding neighboring terminal spare from the front, and wherein, this lower surface of the end of this player's one side of this key matrix is lower than the lower surface of this preceding neighboring terminal spare.

By the structure of the invention described above fourth aspect, this xylem provides wood appearance to key.In addition, when be used for to the pressing key final position provide restriction a locating part, be arranged on this key structure under player's end, end and this locating part adjacency (abutment) towards the player of this key structure, it provides the pivoting action limit function of optimizing.Even by above-mentioned structure, this key is pushed final position by the determining towards player's a end and the adjacency between this locating part of this key matrix, and has avoided contacting between preceding neighboring terminal spare and this locating part.For example current neighboring terminal spare be fixed to this xylem when player's end, this has just prevented before this fixing owing to pressing key is repeatedly operated the deterioration that causes between the neighboring terminal spare and this xylem.In addition, when this upper plate is arranged to: make this xylem be fixed on this upper-part, and should before neighboring terminal spare when being provided with the fixing relation of this upper plate, just can prevent fixing between this xylem and this upper plate owing to pressing key is repeatedly operated and worsened.Therefore, can guarantee the correct pivot limit function of this locating part, and prevent simultaneously key towards player's end owing to the key pressing operation breaks down, guarantee the desirable durability of key structure thus, wood appearance is provided for simultaneously this key.In addition, this preceding neighboring terminal spare extends to, sees from the front this preceding neighboring terminal spare and this key matrix position overlapped along this xylem, thereby the connection between this xylem and this key matrix is sightless, thereby good key outward appearance is provided.In addition, because the front end of this key structure does not have connection, just can obtain stable steering capability.

Preferably, this xylem has towards player's a end, and is somebody's turn to do this end towards the player that preceding neighboring terminal spare is fixed to this xylem.

By the structure of the preferred embodiment, can prevent between this preceding neighboring terminal spare and this xylem fixing, since repeatedly pressing key operate and worsen.

Preferably, this key structure can be installed in the key board unit, this key board unit has a locating part (83) that is formed on wherein, and have towards player's a end, this locating part is set directly at this key matrix under this lower surface of this end of player, and is used to be adjacent, push final position with the key that limits this key structure, and this preceding neighboring terminal spare is compared with the end towards the player of this locating part, is positioned at more the position towards this player.

By the structure of this foregoing description, this preceding neighboring terminal spare is not positioned on this locating part, thus, promptly uses very big power pressing key, this preceding neighboring terminal spare also not can with this locating part adjacency.Neighboring terminal spare degenerated owing to pressing operation repeatedly before this can more effectively prevent.

In order to realize the 4th purpose, a fifth aspect of the present invention provides a key structure (300), is used for comprising as a key of making pivoting action under the operation of pressing key: a key matrix (97) has a top and towards player's a end; One xylem (95) is fixed to this top of this key matrix, and this xylem has towards player's a end (95b), and the described end towards the player of this xylem has a lower surface (95a); With a preceding neighboring terminal spare (96), be fixed to this end of this xylem towards the player, should have a lower end (96a) by preceding neighboring terminal spare, wherein this end towards the player of this xylem is compared with this end towards the player of this key matrix, be positioned at more position towards the player, thereby this lower surface towards this end of this player of this xylem is exposed, and wherein, the lower surface towards this end of player of this xylem, be positioned at the position of this lower end that is lower than this preceding neighboring terminal spare.

By the structure of fourth aspect present invention, this xylem provides wood appearance to key.In addition, provide a locating part of restriction when being used for pushing final position, be arranged on this key structure under player's end the time to key, wherein, push final position at this key, key is pushed and is terminated, end and this locating part adjacency towards the player of this key structure, it provides the pivoting action limit function of optimizing.Even by above-mentioned structure, this key is pushed final position and is determined by the exposed portions of the lower surface of this end of this xylem and the adjacency between this locating part.For example current neighboring terminal spare be fixed to this xylem when player's end, this has just prevented before this fixing owing to pressing key is repeatedly operated the deterioration that causes between the neighboring terminal spare and this xylem.In addition, when this upper plate is arranged to: make this xylem be fixed on this upper-part, and should before neighboring terminal spare when being provided with the fixing relation of this upper plate, this just can prevent fixing owing to pressing key is repeatedly operated and worsened between this xylem and this upper plate.Therefore, can guarantee the correct pivot limit function of this locating part, and the front end that prevents key guarantees the desirable durability of key structure thus owing to the key pressing operation breaks down, this key provides wood appearance simultaneously.

Preferably, this preceding neighboring terminal spare is fixed to this xylem this end towards the player.

By the said structure of this preferred embodiment, can prevent between this preceding neighboring terminal spare and this xylem fixing, because pressing key is repeatedly operated worsens.

In order to realize the 5th purpose, a sixth aspect of the present invention provides a key structure, is used for comprising: towards player's a end as a key of making pivoting action under the operation of pressing key; One keeper (68); One xylem (67) is fixed on this keeper, and this xylem has towards player's a end (67b) and a bottom (67a); With one before neighboring terminal spare (81), be fixed to this key structure towards player's end, this preceding neighboring terminal spare has a lower end (81a), wherein this bottom of this xylem is positioned at the position of this lower end that is higher than this preceding neighboring terminal spare.

By the structure of a sixth aspect of the present invention, this xylem provides wood appearance to key.In addition, the part of this key on this preceding neighboring terminal spare is sightless from the front portion, and therefore, by this xylem being arranged on the lower surface of this preceding neighboring terminal spare, can use timber effectively, guarantees the wood appearance of this key simultaneously.

In order to realize the 6th purpose, a seventh aspect of the present invention provides a key structure (400), it has a pivot (21) and towards player's a end (128), it can be installed in the key board unit, make it under of the operation of this end of player, move pivotally around this pivot at pressing key, can be used as a key thus, comprising: an xylem (54); One keeper (125,55), it keeps this xylem regularly; With one invisible (R2), its be present in this between player's end and this pivot along in the zone longitudinally of key structure, during the performance of this key board unit and not playing, can't see this invisible portion from the outside; Wherein, this invisible portion has a groove (58) that is formed on wherein, is used for installing therein at least one functional part, to realize the key operation of at least one this key structure.

By the structure of seventh aspect present invention, this groove is provided, it makes when the functional part of having installed such as the key returning spring, can shorten the distance between this framework and this key, saves the space on the vertical direction thus.In addition, owing to reduced uneconomic use of the timber of this xylem, also can reduce the weight of this key board unit.

Preferably, this xylem has a bottom, and wherein, this keeper comprises a key matrix, and this key matrix keeps this bottom of this xylem regularly, and this groove is formed in this key matrix.

By the structure of this preferred embodiment, this groove is arranged in the key matrix that is formed from a resin.Therefore, compare its easier being formed with the situation that groove is formed in the xylem.

Preferably, this functional part comprises a key returning spring (57), and it oppresses this key structure along replying direction, and wherein, this groove is formed on the bottom of this key matrix.

By the above-mentioned structure of the preferred embodiment, can easily form this groove, and easily guarantee required precision.

Preferably, this xylem corresponding to the part of this groove that is formed on this key matrix, have a groove that forms by bore hole (counter boring).

In order to realize the 6th purpose, a eighth aspect of the present invention provides a kind of key structure, it has a pivot and towards player's a end, it can be installed in the key board unit, thereby it moves pivotally around this pivot under the operation of this end of player at pressing key, can be used as a key thus, comprising: an elongated key matrix, it has a top and a free end; One xylem is fixed on this top of this key matrix, and this xylem has a top and a lower surface; One upper plate is kept regularly by this top of this xylem; With one be directed to portion, it is when having an effect when this pivot moves pivotally towards this end of player, so that be directed to thus towards this end of player, wherein: this portion of being directed to has a pair of part that dangles (42), and its free end along the direction of pressing key from this key matrix dangles and descends; Should have lower end and left and right inwall respectively to the part that dangles; And this is directed to portion and by this this a left and right inwall of part that dangles and a space that is limited between this left and right inwall is formed, and this space extends to the position of this lower surface of this xylem at least from the position of this lower end of this part that dangles.

By the structure of eighth aspect present invention, can guarantee that this is directed to the required vertical length of portion by the thickness of this key matrix, it provides stable steering capability to this portion of being directed to.And, when providing wood appearance, can reduce the size and the weight of this key board unit to key.

Preferably, this key structure also includes a preceding neighboring terminal spare that is formed from a resin, and extends to, sees from the front this preceding neighboring terminal spare and this key matrix position overlapped along this xylem from this upper plate, and this preceding neighboring terminal spare is directed to portion's adjacency with this.

Above-mentioned structure by the preferred embodiment, should extend to, see this preceding neighboring terminal spare and this key matrix position overlapped along this xylem from upper plate by preceding neighboring terminal spare from the front, thereby the connecting portion between this upper plate, xylem and the key matrix is sightless, to provide good surface appearance to key.In addition, the front end of this key structure does not have connecting portion, and it provides stable steering capability to this portion of being directed to.

Preferably, this has separately top to the part that dangles, and this key structure also comprises a pair of extension (47A, 47B), it extends to the surface of this key from top separately, and this xylem has a groove (121), and it is formed on it corresponding in this part to extension by bore hole.

By the structure of this preferred embodiment, this degree of depth that is directed to the groove that the required vertical length of portion can form at this xylem by the thickness of this key matrix with by bore hole guarantees that it provides more stable steering capability to this portion of being directed to.

Preferably, this has towards the end of this key surface separately to extension, and wherein this portion of being directed to has a closure (47U), and it has sealed and has been limited to this to the space between this end of extension.

By the structure of this preferred embodiment, when lubricant being applied to this inside that is directed to portion, this closure has been cut off the passage between lubricant and this xylem, and this has just prevented that lubricant from entering into xylem, to keep greasy property in the long time.

In order to realize the 6th purpose, a ninth aspect of the present invention provides a key structure (500), it has a pivot, towards player's a end (128) and a rear portion, it can be installed in the key board unit, thereby it moves pivotally around this pivot under the operation of this end of player at pressing key, can be used as a key thus, comprising: an xylem (62), it has a lower surface (62a); One keeper (125,63), it keeps this xylem regularly; With an invisible portion, it is present in the below at this rear portion at least, during the performance of this key board unit and not playing, can't see this invisible portion from the outside; Wherein this invisible portion has a groove (64) that is formed on wherein, be used for installing therein at least one functional part (57), to realize the key operation of at least one this key structure, this groove is limited by this lower surface of this xylem, and this lower surface is tilted to away from the end towards this player along this key structure direction backward.

By the structure of ninth aspect present invention, this groove is arranged on invisible portion.This helps to reduce the size and the weight of this key board unit, and guarantees wood appearance.

Preferably, this xylem is set to: make its lower surface be positioned at key and push the below that the key of the adjacent keys structure of final position is pushed surface (L1), and extension in parallel basically.By this structure, it can guarantee the wood appearance of this key, uses the timber of minimum simultaneously for this xylem, saves the material that is used for this xylem thus effectively.

In order to realize the 7th purpose, provide a key board unit to comprise: at least one key structure (100), and at least one mass member (71) in a tenth aspect of the present invention, wherein this key structure comprises: a key matrix that is formed from a resin, it has a top (10a, 33a, 31), a bottom (10c, 33e, 33d, 32b) and connecting portion (10b, a 33b who is connected to this top, 33c, 32a); One middleware (20L, 20R, 34L, 34R), it is arranged in this top and a zone between this bottom of this key matrix, and wherein this middleware is visible from the outside in the process of playing this key board unit, with the mass member actuator, wherein, this middleware is made by wood materials, and this upper end of this middleware contacts with this top of this key matrix, and this lower end of this middleware extend to this key matrix this bottom near, and wherein this mass member is driven by this mass member actuator.

By the structure of tenth aspect present invention, can provide wood appearance to key with lower cost.

Preferably, this key structure has relative cross side, and is configured to use as a white key, and wherein this middleware only is arranged on one of them of this relative cross side, at this cross side, does not have black key adjacent with this key structure.

By the said structure of this preferred embodiment, this middleware is set to take the minimum possibility area of this key structure, makes like this and has further reduced cost and kept wood appearance.

In order to realize first purpose, a eleventh aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to first aspect present invention.

In order to realize second purpose, a twelveth aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to second aspect present invention.

In order to realize the 3rd purpose, a thirteenth aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to third aspect present invention.

In order to realize the 4th purpose, a fourteenth aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to fourth aspect present invention.

In order to realize the 4th purpose, a fifteenth aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to fifth aspect present invention.

In order to realize the 5th purpose, a sixteenth aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to sixth aspect present invention.

In order to realize the 6th purpose, a seventeenth aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to seventh aspect present invention.

In order to realize the 6th purpose, a eighteenth aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to eighth aspect present invention.

In order to realize the 6th purpose, a nineteenth aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to ninth aspect present invention.

In order to realize the 7th purpose, a twentieth aspect of the present invention provides a key board unit, comprising: a plurality of keys, one of them of described at least a plurality of keys formed by this key structure according to tenth aspect present invention.

Above-mentioned and other purpose, feature and advantage of the present invention, after the description of embodiment, it is clearer to become below having read in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 shows the sectional view of the structure of a key board unit (musical instrument device), and this key board unit comprises the key structure according to first embodiment of the invention;

Fig. 2 A is the cross sectional view along the key structure of A-A line among Fig. 1;

Fig. 2 B is the cross sectional view along the key structure of B-B line among Fig. 1;

Fig. 2 C is the cross sectional view along the key structure of C-C line among Fig. 1;

Fig. 2 D is the cross sectional view along the key structure of D-D line among Fig. 1;

Fig. 2 E is the cross sectional view along the key structure of E-E line among Fig. 1;

Fig. 2 F is the cross sectional view along the key structure of F-F line among Fig. 1;

Fig. 3 A shows the sectional view of structure of another example of the key structure of first embodiment of the invention;

Fig. 3 B shows the sectional view of structure of another example of the key structure of first embodiment of the invention;

Fig. 3 C shows the sectional view of structure of another example of the key structure of first embodiment of the invention;

Fig. 3 D shows the sectional view of structure of another example of the key structure of first embodiment of the invention;

Fig. 4 A shows the side view according to the structure of the front end of the key structure of first embodiment;

Fig. 4 B is the upward view foremost of this key structure;

Fig. 4 C is along the sectional view of the front end of the key structure of the G-G line among Fig. 4 B;

Fig. 4 D is the X1 zoomed-in view partly that occurs among Fig. 4 C;

Fig. 5 shows the sectional view according to the structure of the front end of the key structure of the variant I of first embodiment;

Fig. 6 is the partial section that has shown the structure of key board unit, and this key board unit has comprised the key structure according to second embodiment of the invention;

Fig. 7 A is the right view that has shown according to the front-end structure of the key structure of the variant II-1 of second embodiment;

Fig. 7 B is the right view that has shown according to the front-end structure of the key structure of the variant II-2 of second embodiment;

Fig. 7 C is the right view that has shown according to the front-end structure of the key structure of the variant II-3 of second embodiment;

Fig. 7 D is the right view that has shown according to the front-end structure of the key structure of the variant II-4 of second embodiment;

Fig. 8 is the right view that has shown according to the front-end structure of the key structure of the variant II-5 of second embodiment;

Fig. 9 is the right view that has shown according to the front-end structure of the key structure of the variant II-6 of second embodiment;

Figure 10 is the partial section that has shown the structure of key board unit, and this key board unit has comprised the key structure according to third embodiment of the invention; With

Figure 11 is the partial section that has shown the structure of key board unit, and this key board unit has comprised the key structure according to fourth embodiment of the invention.

Embodiment

Below in conjunction with the accompanying drawing that shows the specific embodiment of the invention, describe the present invention in detail.

Fig. 1 shows the sectional view of key board unit (keyboard instrument) structure, and it comprises the key structure according to first embodiment of the invention.

Come work according to the key structure 100 of first embodiment as one of them of a plurality of keys of main key board unit as musical instrument (keyboard instrument), it can move pivotally by depressing.Fig. 1 shows the sectional view of key board unit, shows the part between B key and the C key, and Fig. 1 is the right side view of a key structure 100, and this key is the B key from the player.This key structure 100 is applicable to a white key, but the structure of this key structure 100 not only can be used for Bai Jian, also can be used for black key.In the following description, key board unit and key structure 100 are called as " front side " towards player's a side.

This key structure 100 comprises a key matrix 40 and a key body BOD, and it forms parts.This key body BOD comprises the xylem 60 that a upper plate (upper plate) 50 and is made by timber.This upper plate 50 comprises the upper plate portion 50b that an anterior 50a and provides the key operation surface.This front portion 50a and upper plate portion 50b are formed from a resin and form as one each other, and the length of this xylem 60 roughly length with the upper plate portion 50b of this upper plate 50 is identical, and is attached to upper plate portion 50b and anterior 50a, forms this key body BOD with this upper plate 50 thus.

This key matrix 40 comprises the extension 40b that a key matrix end 40a and is extended forward by key matrix end 40a, and it is formed from a resin and forms as one each other.In addition, this extension 40b have be integrally formed therewith, be directed to portion 42, a mass member actuator 43, a key actuated piece 44 and as a key of key functional part (" associated splice part parts ") and prevent mechanism's part 45 that key drops.This extension 40b extends to the anterior 50a of this upper plate 50 substantially abreast along its longitudinal axis and this key body BOD.Also the rearward end with this key structure 100 is corresponding for this key matrix end 40a.The rearward end of this key matrix end 40a is provided with a pivot 41, so that this key structure 100 can be around this pivot vertical movement.The lower end of this mass member actuator 43 is equipped with a sliding part 46, is used to guarantee to slide smoothly.

On the other hand, mass member 71 is arranged on the below that does not have relative key structure 100.This mass member has a driven member 71a, and it, is driven by sliding part 46 by the mass member actuator 43 of key matrix 40 according to the pressing operation of key.This makes this mass member 41 around a mass member pivot 72 motions, so that suitable key sensation to be provided.In addition, key board unit of the present invention is provided with one first bond switching 73 and one second bond switching 74, and it is 2 grades of formulas (2-make type).After the pushing of the key actuated piece 44 that is subjected to key matrix 40, these first bond switching, 73 work are pressed the key motion that discharges with key to detect such as key.After being subjected to being arranged on the pushing of key actuated piece 71b on the mass member 71, these second bond switching, 74 work are to detect key motion.These two bond switchinges 73 and 74 can detect the key motion of contactless state on the different time points separately in the key operation sequence, that comprise key, can carry out dissimilar tone controls based on this testing result thus.

Key board unit of the present invention also is provided with a key operation guide 75 and a fitting piece 77, as the key functional part.In key operation, the key of this key structure 100 is directed to portion 42 by this key operation guide 75 guiding, can be limited in the oscillating motion on the adjacent keys direction (key structure 100 laterally) thus.Hereinafter will discuss the configuration that this key is directed to portion 42 and this key operation guide 75 in detail.This mechanism's part 75 that prevents that key from dropping engages with this fitting piece 77, in key operation, prevent thus key structure 100 mainly forwards to drop.

In addition, it in planimetric map the spring 51 of fork-shaped, it is S shape in side view, near the rear portion that extends to key structure 100 in the mode that hangs from this mass member pivot 72, this spring 51 is oppressed this key structure 100 backward, simultaneously this mass member 71 is pressed to this mass member pivot 72, prevent that thus key structure 100 and mass member 71 from dropping from this pedestal 1000 easily.

Fig. 2 A to Fig. 2 F be among Fig. 1 along the sectional view of A-A line to the F-F line, it shows key structure.Fig. 2 A shows the B key to Fig. 2 F, and as an example, it is formed with a groove, be used to allow to be adjacent a black key (A# key) is set, therefore in these figure, key structure 100 is from player's direction, has the left side (side 100a) of the less or indentation in the horizontal of width.

Shown in Fig. 2 A, this key structure 100 is configured to this xylem 60 and is clamped between the upper plate portion 50b and this key matrix 40 of this upper plate 50.The upper surface of the extension 40b of this key matrix 40 is formed with a ridge 40c, and it extends to the junction of this extension 40b and this key base ends 40a from front end.In addition, this xylem 60 is formed with the groove 60c of a groove shape, so that should can be configured in wherein by projection 40c.This key structure 100 is by forming earlier this key body BOD, should be installed among the groove shape groove 60c of this xylem 60 by projection 40c then, afterwards this xylem 60 and this extension 40b is combined togather and forms.

This xylem 60 also plays the function that this key structure 100 provides wood appearance.That is to say that after contiguous key was pressed down, the part of the side of this key structure 100 was exposed under player's the sight line.Yet, the side 60a of the xylem 60 that forms by timber and side 100a and the 100b that 60b has formed key structure 100, it makes the player can see the side 60a and the 60b of xylem 60, thus, make what the integral body of key structure 100 except its upper surface and front surface was seemingly made by timber.This makes this key structure present wooden outward appearance, and has high-quality outward appearance thus.

In addition, as shown in Figure 1, this key board unit comprises panel piece 76, is arranged on the upper position of this key structure 100.This panel piece 76 is provided with various unshowned executive components and a unshowned display part, and this panel piece also plays the effect of hiding part, is used for hiding the part at key board unit rear.This key body BOD that it is provided with xylem 60 extends to the position at the rear of this panel piece 76, and the player can't see the border between the key matrix end 40a of this key body BOD and key matrix 40, the outward appearance of having beautified this key structure 100 so thus.

Like this, as the side 60a of the wood surface of this xylem 60 and 60b the side that vertically is arranged on key body BOD along key board unit, this makes that when pressing adjacent key the wood surface 60a and the 60b of this xylem 60 present to the player, and it has strengthened the wood appearance of key structure.And this key body BOD that all has elongated shape manufactures with this key matrix 40 and can do in phase (unison) motion.The extension 40b of this key matrix 40 almost is parallel to this key body BOD extension along its longitudinal axis simultaneously.And this extension 40b is integrally formed with a plurality of key functional parts that are directed to portion 42 such as the key that is used to realize the key function.With compare under the conventional situation, promptly use wooden key and key functional part to form thereon situation by the wooden part of processing wooden key, this has increased function and the degree of freedom of shape and the precision of processing these parts that designs this key functional part, to be easy to guarantee the accuracy of key function.Therefore, just can increase the degree of freedom of design key functional part,, provide wood appearance to key simultaneously to be easy to guarantee to realize the high precision of key function.

Further, compare with the conventional keys structure of the material of coated with resins and so on wood substrate, process easily, it makes it possible to the key structure with lower cost, quality of production homogeneous.Therefore, can low cost make key increase wood appearance.

In addition, because this key matrix 40 is formed by resin, just might increase design freedom, durability and the mar proof of the key matrix 40 that comprises the key functional part.Thus can be so that the key function keeps higher precision in the long time period.And this xylem 60 can be regarded as being packed into the solid-state component of this key structure 100, has guaranteed the higher rigidity of this key thus.

In addition, this xylem 60 be arranged on this key structure 100 rearward end pivot 41 and corresponding to the vertical centre position between the anterior 50a of this upper plate 50 of the front end of this key structure 100.Therefore, this point and prior art are had any different, key structure 100 of the present invention is not using the wooden key that is used for acoustic piano and should form following formula (seesaw-type) key by wooden key by a pivot that is provided with in vertical centre position, and presents wood appearance.In addition, compared with prior art, can shorten the length of the part of this key structure after this pivot.This makes the longitudinal size and the weight that can reduce this key provides wood appearance to key simultaneously.

In addition, " relevant conjunction parts " form with resin piece this key matrix 40 integratedly be directed to portion 42 such as pivot 41 and key, relevant with these like this conjunction parts are compared with the situation that timber forms, can easily reach higher precision, increase the design freedom of its shape simultaneously.In this respect, if the integral piece that this key structure relevant conjunction parts with this that are this pivots integrally form simply as prior art, just can not provide wood appearance, and can reduce the rigidity of key, influence the feel of key unfriendly.On the contrary, in the present embodiment, this xylem 60 can be regarded as being packed into the solid-state component in this key structure 100, and it has guaranteed the higher rigidity of key.Because this higher rigidity, the pressing force of this key can accurately be sent to this relevant conjunction parts, has strengthened the feel of key owing to the degree of accuracy that has increased the touching detection.And higher rigidity helps to suppress the warpage of key structure 100.Like this, this key structure 100 can keep the execution precision of key function, and increases the rigidity of key, provides wood appearance to key simultaneously.

Now, only the key structure 1 for white key provides xylem 60, and it can be reduced cost.In addition, if only in not adjacent with this black key side of this key structure xylem 60 is set, consequently this xylem 60 occupies the minimum possible zone of this key structure, can further reduce cost like this, keeps this wood appearance simultaneously.

From increasing the angle of wood appearance, the example that the structure of this key structure 100 is not limited to illustrate.Also can adopt the suitable structure that illustrate of Fig. 3 A to Fig. 3 D.

Fig. 3 A is a sectional view according to other example of first embodiment of the invention key structure to Fig. 3 D, and it shows the sectional view corresponding to the foregoing description Fig. 2 A structure.

For example, Fig. 3 A shows an example, and wherein the parts corresponding to upper plate 50 and key matrix 40 are formed from a resin, and form as one each other.More specifically, upper plate 10a and lower plate 10c are linked together by a junction 10b, to form " H " shape of a side direction concavo-convex (buckled).In this example, xylem comprises the separation member 20L and the 20R of the relative both sides that are arranged on this connecting portion 10b, forms key structure thus.

Under the situation of the example shown in Fig. 3 B, one carinate protruding 31a is formed on the upper plate 31 that is formed by resin in the mode of downward extension, connecting portion 32a and lower plate 32b form as one, and be formed from a resin, be formed with the groove 32aa of ditch shape on this connecting portion 32a top, to allow this projection 31a portion that sets within it.When assembling, the protruding 31a of this upper plate 31 is arranged among the groove 32aa of this connecting portion 32a, and thereon fixed, and the example of separating component 20L and 20R and Fig. 3 A similarly is provided with.Formed key structure thus, wherein its unit construction is an integral piece.

In addition, shown in Fig. 3 C, a upper plate 33a and lower plate 33d and 33e are connected to form by two web member 33b and 33c and are integral piece.In this case, be formed with a groove 35 between web member 33b and 33c, the outside than the thin xylem 34L of xylem 20L and 20R and 34R are arranged on web member 33b and 33c forms key structure thus.

In addition, shown in Fig. 3 D, xylem 37 vertical folders are held between the upper plate of making by resin 36 and lower plate 38, and are attached on it, form the become one key structure of part of its component composition thus.

Fig. 4 A is the front view according to the key structure 100 of first embodiment of the invention; Fig. 4 B is the upward view of key structure front end; Fig. 4 C is the sectional view of this key structure along the front end of G-G line among Fig. 4 B.The zoomed-in view at X1 position among Fig. 4 D Fig. 4 C.

The front end of this key structure 100 has the width (Fig. 2 A and Fig. 2 B are compared) of increase in plan view.That is to say that shown in Fig. 4 A, the part 60h of broadening that has an xylem 60 of same widths with the part 50h of the broadening of the upper-part 50h of upper plate 50 is arranged on the below of the part 50h of this broadening.Like this, to shown in the 4C, be formed with groove 121 at the part 60h of the broadening of the xylem 60 of key structure 100 front ends as Fig. 4 A, it has the shape of rectangular parallelepiped, and under shed.This groove 121 for example can form by the method for bore hole.In addition, this key matrix 40 is provided with a protruding counterpart (lubricant separation mechanism pieces) 47 with these groove 121 corresponding parts, and it is continuous that itself and this key is directed to portion 42.More particularly, this key is directed to portion 42 to be made up of a pair of part that dangles under dangling from the direction of the front end edge pressing key of this key structure 100, to be directed to when this pivot 41 pivots at this key structure 100.This projection counterpart 47 continues to extend upward to the part that dangles from this.In addition, this projection counterpart 47 is arranged in this groove 121.

Shown in Fig. 4 C, this projection counterpart 47 comprises a horizontal wall 47U and two vertical wall 47A and 47B.Horizontal wall 47U forms the upper end (towards an end of this key upper surface) that is adjacent to this groove 121, this groove 121 forms by this xylem 60 is carried out bore hole, this horizontal wall 47U has sealed the upper end that is limited to the space between this vertical wall 47A and the 47B thus, forms the wall of a sealing thus.This projection counterpart 47 has and is limited to its inner groove 47a, and has the vertical inside surface with these key operation guide 75 sliding contacts.This projection counterpart 47 also plays " lubricant separation mechanism pieces ", and is as mentioned below.This groove 47a also can form the key guide.

This key is directed to the configuration of portion 42 and can describes in another way: this key is directed to portion 42 and mainly this inner left wall of gripping member (handing parts) and right side inwall 42a, the space that limits between this left side wall and right side wall 42a is made of, and this space extends to the plane (level) of the lower surface 60d of this xylem 60 at least from the lower end of this inner left wall and right side inwall 42a.This key is directed to portion 42 and makes that these two sidewall 47a and 47b are a pair of extensions that the top separately of the part that dangles is extended towards this key surface respectively from this, and this xylem 60 is formed with groove 121 corresponding to the part of this extension by bore hole.

Have lower height if key operation guide 75 forms, thereby in the operation of pressing key, it stops at the identical plane of upper surface of this key matrix 40, so just can omit this groove 121.Even in this case, can be the vertical length part that this key is directed to portion 42, guarantee corresponding to the thickness of this key matrix 40 amount in the length of vertical direction, therefore in the side of pushing upwardly extending this space only need extend to the lower surface 60d of this xylem 60 from the lower end that key is directed to portion 42.That is to say, the lower surface of this groove 47a can with the lower surface 60d of this xylem 60 concordant (flush).Even, also can show stable key and push guide function because this depth dose of this groove 47a is compared with the situation that the lower surface and the lower surface of this key matrix 40 of this groove 47a are concordant.In the present embodiment, as hereinafter described, this projection counterpart 47 is arranged in the groove 121 of this xylem 60, and this key operation guide 75 slides and is plugged in this projection counterpart 47, and it makes this key push guide function even show more stablely.

In addition, can understand from Fig. 4 A, the anterior 50a of this upper plate 50 is corresponding to preceding neighboring terminal spare.This front portion 50a extends vertically downward and covers this key matrix 40 along this xylem 60 and this key matrix 40.This can be avoided seeing from the front junction between this xylem 60 and this key matrix 40, has improved the outward appearance of key.In addition, owing to do not have the junction at this front portion 50a, when key is directed to, can not meet this front portion 50a, this provides this key to be directed to the stable steering capability of portion 42.

Shown in Fig. 4 C and Fig. 4 D, the width configuration of adjacent key direction is as follows: at first, the width of neighboring terminal spares equals the width of the 60h of broadening portion of the width of the 50h of broadening portion of upper plate 50 and xylem 60 before the key structure 100, and this width is represented with " B0 ".In addition, the width means of this groove 121 is " W0 ", the width means of key operation guide 71 is " B1 ", the width of this vertical wall 47A and 47B (thickness) is expressed as " B2 " and " B3 " respectively, and the gap between the sidewall of the wall 47A of this projection counterpart 47 and 47B and relative with it respectively this xylem 60 is " B4 ".Like this, the width W 0 of this groove 121 can be calculated by following formula:

W0＝B1＋B2＋B3＋B4。

The width that is generally used for this key of piano is called as " standard key ", and it is approximately 21 to 23mm, and in the present embodiment, B0 is set to 22.5mm.Explanation is in passing, and this key operation guide 75 need have enough rigidity, and finishing its function well, and therefore its thickness B 1 is set to 5.25mm.For the rigidity that guarantees that it is enough, this wall 47A of this projection counterpart 47 and the thickness B 2 of 47B and B3 all are set to 2.5mm.In addition, the target size of this gap B4 is set to 0.5mm, to allow the change in size of this groove 121 and this projection counterpart 47.

By above-mentioned setting,, be necessary the width W 0 of this groove 121 is set to be not less than 11.25mm at least in order to make this key operation guide 75 of installing have sufficient intensity.Therefore, in the present embodiment, width W 0 is set to 11.25mm, that is to say, is set to 50% of width B 0.

Now, the ratio between the width B 0 of the width W 0 of this groove 121 and the front end of this key structure 100 be not less than 50% setting, also can similarly be applied to have on the key of different in width, to guarantee the enough rigidity of this key operation guide.That is to say, the suitable thickness value of the wall of this key operation guide and this projection counterpart changes with the width of key, thus make the minimum possible value of width W 0 of necessary this groove 121 of key operation guide operate as normal be not less than this key structure 100 front end width B 0 50%.

Be pointed out that in passing, the functional part that is contained in the protruding counterpart that is arranged in this xylem 60 can be: also have except that this key operation guide 75, actuator such as mass member actuator 43 and key actuated piece 44, luminous component such as LEDs, such as the sensor of capacity cell, detection part such as piezoelectric element or the like.Nearly all these functional parts, it is configured to and this key structure 100 separated components, has the size that can be contained in this width W 0 scope.Therefore, the ratio of this width W 0 is set to be not less than 50%, has increased the scope of the type of installable functional part in fact.

Some functional parts, for example mass member actuator and key actuated piece can be integrally formed with this upper plate 50, for example, form in the mode of dangling downwards from upper plate 50.In this case, this xylem 60 can be formed with a through hole therein, replaces this groove 121, and this functional part can dangle by this through hole thus.At this moment can use the setting of width and thickness same as described above.

On the other hand, maximum permissible value as for the width W 0 of this groove 121, preferably use under the situation of xylem at this key structure, the maximum permissible value of the width W 0 of this groove 121 be according to this xylem 60(should big width segments 60h) the relevant restriction of processability and definite.More particularly, the processing that this xylem 60 is relevant with width is usually by being that cutting tool such as throw is finished.Yet if owing to be provided with too big value for the width W 0 of this groove 121, the thickness of sidewall that limits this xylem 60 of this groove 121 will be too little, at this moment just can not process at an easy rate.For example, when becoming, thickness equals to be no more than the value of 2mm, especially when about 1mm, in carrying out the relevant process of width, just may stiffening plate be set, process otherwise be difficult under the processing conditions that is suitable for wood cutting at the associated components of this xylem 60.

For all these reasons, considering at xylem 60 and other associated components of being fit to para-linkage body under the processing conditions to add man-hour, is that the sidewall that limits the xylem 60 of groove 121 distributes the thickness of 2mm at least in the time of preferably.By considering these situations, for standard key, preferably the maximum permissible value of the width W 0 of this groove 121 is set to about 18mm.Therefore, aspect ratio, the width W of groove 121 0 is no more than 80% setting with the ratio of the width B 0 of the front end of this key structure 100, may be used on nearly all key structure with different in width.After all, consider the degree of freedom that the difference in functionality parts are installed, the number percent of width W 0 and width B 0 is preferably in 50% to 80% scope.

In addition, for this upper plate 50 and should the horizontal wall 47U of projection counterpart 47 between xylem 60 specify several millimeters thickness, can prevent thus because the combination between this upper plate 50 and this xylem 60 and form depression, and provide to key and to push or to play the surface uniformly at the upper surface of this upper plate 50.This makes it not only can guarantee this key good surface appearance, and the key that also can reduce the difference when playing touches sense.

Be pointed out that in passing the thickness of this key operation guide 75 is B1, it is substantially equal to the width of the groove 47a of this projection counterpart 47.Therefore,, between this key operation guide 75 and this groove 47a, be provided with lubricant in order to be implemented in the smooth sliding contact between this key operation guide 75 and this groove 47a, not shown.This projection counterpart 47 also plays " lubricant separation mechanism pieces ", that is to say, between the groove 121 of groove 47a and this xylem 60, stops lubricant, avoids lubricant to enter into this xylem 60 thus.Furtherly, lubricant is sealed between key operation guide 75 and this groove 47a basically, and making does not almost have the evaporation of lubricant.These features have not only prevented fading of xylem 60, and have prevented because the distribution of lubricant and the rotten improper function that causes.

Disclosed key structure in the Japanese Utility Model that the former registration publication number of quoting is No.2514485 also is configured to: one waves anti-shotpin is plugged in the groove that is formed on the xylem.Yet this waves anti-shotpin and is configured to slide with respect to a hole, and thus lubricant is spread upon in the hole, this hole is formed on and is installed on this pin vinyl cover on every side.In this case, lubricant continues to be exposed in the air, thus because the contacting of lubricant and air, and the worry that has lubricant to evaporate and to go bad, and finally make this wave to prevent the shotpin cisco unity malfunction.From preserving lubricant and have the viewpoint of the lubricant effect of long period,, compare obviously favourable with traditional key structure according to the configuration of the key structure associated components of the embodiment of the invention.

This projection counterpart 47 not only can be this key operation guide 75 as the lubricant separation mechanism pieces.More particularly, key press and the operation that discharges in, if functional part has sliding relation with this groove 47a in this groove 121, and is coated with lubricant on this functional part, this projection counterpart 47 still can be this functional part as effective lubricating agent separation mechanism pieces.

According to present embodiment, this xylem 60 has increased wood appearance for this key structure.In addition, the width W 0 that is formed on the groove 121 of the 60h of broadening portion be set to be not less than this key structure front end width B 0 50%, and be not more than its 80%.Like this, can increase the degree of freedom that at least one functional part that independently forms with this key structure is installed, the processibility that maintenance is simultaneously got well.In addition, because this projection counterpart 47 enters into xylem 60 with regard to having prevented the lubricant that is applied on this key operation guide 75, just greasy property might be kept long time.

Below, the variant of description first embodiment of the invention.

Fig. 5 is a cross sectional view, shows the structure according to the front portion of the key structure of the variant I of present embodiment, and corresponding with Fig. 4 C.

Although at Fig. 4 A in the example of Fig. 4 D, this upper plate 50 and this key matrix 40 form separated components, in variant I shown in Figure 5,, be fixed on lower surface corresponding to the upper plate 48 of this upper plate 50 corresponding to the xylem 52 of xylem 60 not corresponding to the part of this key matrix 40.Corresponding and groove 122 groove 121 is formed in the xylem 52.The setting of the width of this groove 122 is similar to the width of groove 121, and promptly the width of this groove 122 is set between 50% to 80% of the width of the width of this broadening portion of this upper plate 48 and this xylem 52.The configuration of this key operation guide 75 identical with shown in Fig. 4.

In addition, in the example of Fig. 4 D, integrally formed with this key matrix 40 at Fig. 4 A as this projection counterpart 47 of " lubricant separation mechanism pieces ".Yet, in the variant of Fig. 5, this " lubricant separation mechanism pieces " 51 corresponding to this projection counterpart 47 is integrally formed with this upper plate 48, more particularly, should " lubricant separation mechanism pieces " 51 comprise this upper plate 48 the part matrix 51U that dangles, from this part matrix 51U that dangles dangle and under the groove 51a that dangles part 51A and 51B and be formed on " lubricant separation mechanism pieces " 51 inside, have vertical inside surface, this groove 51a and this key operation guide 75 sliding contacts.This " lubricant separation mechanism pieces " 51 has been blocked the lubricant that is applied to this key operation guide 75 and has been contacted this xylem 52.

Therefore, the variant I shown in Fig. 5 can provide Fig. 4 A same effect to the example shown in Fig. 4 D.

Below, the second embodiment of the present invention is described.Fig. 6 shows the sectional view that comprises according to the structure of the key board unit (keyboard instrument) of the key structure of second embodiment of the invention.

This key structure 200 according to second embodiment for example is configured to a B key.Fig. 6 is the right view of this key structure 200.This key structure 200 is applied to a white key, but the structure of this key structure 200 not only can be used for a white key, and can be used for a black key.In the following description, the side towards this player of this key board unit and key structure 200 is called as " front side ".

The xylem 67 that this key structure 200 is constructed to be made by timber is fixed on the top as the key matrix 68 of a keeper, and upper plate 123 is fixed to this xylem 67 in addition.This upper plate 123 is by comprising one as anterior preceding neighboring terminal spare 81 with the upper plate 66 on key operation surface is provided, and it is made by synthetic resin and forms as one each other.Should can form separated components with this upper plate 66 by preceding neighboring terminal spare 81.This xylem 67 has roughly the longitudinal length identical with this upper plate 66, and is bonded to the lower surface of this upper plate 66, and its front end (player's one side) 67b is bonded to the rear surface of this preceding neighboring terminal spare 81.

This key matrix 68 is made for integral piece by synthetic resin, and has identical longitudinal length with this xylem 67.Be bonded to the top of this key matrix 68 as the lower surface of the bottom 67a of this xylem 67.In addition, this key structure 200 is configured to its front end around pivot 126 vertical ground motions that are arranged on these key matrix 68 rear ends.

One framework 82 has a key returning spring 69 on it and a key is pushed locating part 83.This key returning spring 69 is always upwards oppressed this key structure 200, makes the key structure that is pressed be returned to its original non-compression position thus.This key is pushed the preceding end in contact of locating part 83 and this key structure 200, and the key that limits this key structure 200 thus presses down final position (the below extreme position that these key structure 200 pivoting actions stop).This key is pushed locating part 83 and is set to itself and some contact of this key structure 200, this point as far as possible foremost near it, thereby farthest play its limit function that moves pivotally.More particularly, this key push front end (player's one side) that locating part 200 is arranged on this key matrix 68 and should before neighboring terminal spare 81 under.

Define a gap (having predetermined gap) CL1 in a longitudinal direction between the front end 68a of neighboring terminal spare 81 and this key matrix 68 before being somebody's turn to do, do not interfere with each other between the front end 68a of neighboring terminal spare 81 and this key matrix 68 before being somebody's turn to do thus, even this xylem 67 is because such as the change of the environmental baseline of temperature and humidity, and expands, shrink or when being out of shape.The phenomenon that this has been avoided this preceding neighboring terminal spare 81 and this key matrix 68 to push each other.Thus, can avoid the fixing deterioration between this xylem 67 and this preceding neighboring terminal spare 81 and the key matrix 68, such as the generation of the separation between these parts owing to the change of environmental baseline.Can guarantee the durability that key structure 200 is desirable thus.The amount of expansion, contraction or the distortion of the xylem 67 that the minimum value of this clearance C L1 can be set to consider.

In addition, after having guaranteed this clearance C L1 like this, by being somebody's turn to do the shape (shape that three side sealing closes) that preceding neighboring terminal spare 81 forms the C shape in the plan view, just may move, during this key structure 200 of installation or removal, by should before neighboring terminal spare 81 hand held separately in and can avoid damaging should preceding neighboring terminal spare 81.

In addition, the front end 68a of this key matrix 68 protrudes downwards slightly, and its lower surface 68aa is positioned under the lower end 81a of this preceding neighboring terminal spare 81.Like this, when this key structure 200 moved pivotally downwards, the lower surface 68aa of the front end 68a of this key matrix 68 and this key were pushed locating part 83 adjacency, but the lower end 81a of neighboring terminal spare 81 is not adjacent before being somebody's turn to do.Like this, when the push action of key is blocked, has just suppressed external force and be applied to this preceding neighboring terminal spare 81.Therefore, prevent the deterioration of fixing between neighboring terminal spare 81 and this xylem 67 before this at this point, thereby guaranteed the durability that this key structure 200 is desirable.On the other hand, the key of this key structure 200 is pushed the adjacency that final position pushed between the locating part 83 by lower surface 68aa and this key and is limited.Yet, because this clearance C L1 is set to minimum value (for example, approximately 1mm), this key push locating part 83 can with the adjacency foremost of this key structure 200, it has guaranteed that this key pushes the spacing ability of pivoting action of locating part 83.

In addition, this xylem 67 is set to: the feasible top that is positioned at the lower end 81a of this preceding neighboring terminal spare 81 as the lower surface 67a of these xylem 67 bottoms.Like this, this xylem 67 part of being positioned at the lower end 81a top of this preceding neighboring terminal spare 81 can not seen by the player.Therefore, by this xylem 67 so is set, when guaranteeing wood appearance,, used the timber that forms this xylem 67 effectively by reducing uneconomic use to timber.Like this, can reduce the size and the weight of this key structure 200.

According to present embodiment, it can provide wood appearance to key, and prevented that the environmental baseline change from causing this xylem 67 and being somebody's turn to do deterioration fixing between preceding neighboring terminal spare 81 and this key matrix 81, and prevented the key pressing operation cause this xylem 67 and should before fixing deterioration between the neighboring terminal spare 81, guarantee the durability that this key structure 200 is desirable thus.In addition, can be by reducing the timber that uneconomic use is used for this xylem 67, and the size and the weight of reducing this key structure 200.

This key is pushed locating part 83 and is not limited only to one type, the type has limited this key structure 200 and has pushed caused motion when being stopped by common key, the key of key structure 200 is pushed final position, but also it can be such one type, for example when this key is firmly pressed, maybe when the fierce external force that is different from the key pressing force when the top is applied to this key structure 200, the type is provided with a restriction for the position of this key structure, is stopped at the pivoting action of this this key structure of position.

Below, the variant of second embodiment is described.

Push aspect the final position limiting this key, from avoiding pushing a locating part of locating part 83 and neighboring terminal spare adjacency before this such as key, thereby prevent the angle of the fixing deterioration between this preceding neighboring terminal spare and this xylem, configuration shown in Fig. 6 is not restrictive, also can adopt Fig. 7 A to the configuration of the variant II-1 shown in Fig. 7 D to the variant II-5 shown in II-4 and Fig. 8.

Fig. 7 A is a right view according to the front end of the key structure of variant II-1, II-2, II-3 and the II-4 of second embodiment to Fig. 7 D.At Fig. 7 A in Fig. 7 C, this key locating part 83 the configuration with the position on identical with the example shown in Fig. 6.Identical in parts that Fig. 7 A does not illustrate in Fig. 7 D and Fig. 6.

In the variant II-1 of this Fig. 7 A, preceding neighboring terminal spare 85 is shorter, and the lower end 85a of preceding neighboring terminal spare 85 is positioned at the position of the lower surface that is higher than this xylem 84.Different with the front end 68a of key matrix 68, key matrix 86 does not protrude downwards, but extends longitudinally the position of the lower end 85a of this preceding neighboring terminal spare 85.The lower surface 86a of this key matrix 86 is positioned at the position under the lower end 85a of this preceding neighboring terminal spare 85.

In the variant II-2 shown in Fig. 7 B, II-1 is similar to variant, and preceding neighboring terminal spare 88 is shorter, and key matrix 89 extends longitudinally the front position of xylem 84.The lower surface 89 of the front end of this key matrix 89 is lower than the lower end 88a of this preceding neighboring terminal spare 88.

In the variant II-3 shown in Fig. 7 C, preceding neighboring terminal spare 91 extends to the lower end of xylem.Key matrix 92 extends to the front position of this xylem 84 in the vertical.The lower surface 92a of the front end of key matrix 92 is lower than the lower end 91a of this preceding neighboring terminal spare 91.

Variant II-1 in the II-3 any, in the process that key is pushed, before neighboring terminal spare 85,88 and 91 do not push locating part 83 adjacency with key, thereby can prevent by repeatedly pressing operation may cause should before the deterioration of fixing between neighboring terminal spare and this xylem 84.

In the variant II-4 shown in Fig. 7 D, it is different with the example shown in Fig. 6 that only key is pushed the configuration of locating part.More particularly, key is pushed under the lower surface 68a that locating part 183 is set directly at this key matrix 68, and preceding neighboring terminal spare 81 is positioned at this key and pushes before the front end of locating part 183.Therefore, similar with the example shown in Fig. 6, for example because the pressing operation of key, this key structure 200 pivots when moving downward, the lower surface 68aa of the front end 68a of this key matrix 68 and this key are pushed locating part 183 adjacency, but different with example among Fig. 6 are, even very big external force is applied to this key structure 200, for example by powerful pressing key, this key push locating part 183 also will never with these preceding neighboring terminal spare 81 adjacency.

This makes it can prevent the fixing deterioration between neighboring terminal spare 81 and this xylem 67 before this energetically, has guaranteed the desirable durability of this key structure 200 thus.

Fig. 8 is the front view according to the key structure of the variant II-5 of second embodiment.The parts that do not illustrate among Fig. 8 are identical with the example that illustrates among Fig. 6.

Similar with key structure 200 shown in Figure 6, the key structure 300 in this variant comprises the xylem of being made by timber 95; Key matrix 97 with a top, this xylem 95 is installed in this top; With a upper plate 124 of being made up of preceding neighboring terminal spare 96 and upper plate 94, this upper plate is fixed to this xylem 95.The key of this variant push locating part 83 configuration with identical with shown in Fig. 6 is set.

The front end of this xylem 95 (player's a side) 95b is positioned at the side towards the player, with respect to the front end 97a(player's of this key matrix 97 a side), thus the lower surface 95a of the front end of this xylem 95 comes out.In addition, the lower surface 95a of the front end of this xylem 95 is lower than the lower end 96a of the preceding neighboring terminal spare 96 of upper plate 124.Configuration thus, in the process of pushing, the key of this key structure 300 is pushed final position, is determined by the bottom 95a of the front end of this this xylem 95 that comes out and the adjacency that this key is pushed between the locating part 83, and avoided neighboring terminal spare 96 and this key before this to push adjacency between the locating part 83, its prevented since repeatedly pressing operation may cause the deterioration of fixing between this preceding neighboring terminal spare 96 and this xylem 95.

These variants provide the beneficial effect identical with the configuration among Fig. 6, wherein when guaranteeing correct pivoting action limit function, have avoided the fixing deterioration between this preceding neighboring terminal spare and this xylem, thereby have improved the permanance of key structure.Especially, at variant II-1, among II-2 and the II-5, avoided neighboring terminal spare 85,88 before this and 96 with key matrix separately 86,89 and 97 between be adjacent to each other, provide thus to prevent because the same beneficial effect of the deterioration of fixing of the change of environmental baseline, this associated part.

Although in first embodiment and second embodiment and variant thereof, proposed to prevent the fixed configurations between this preceding neighboring terminal spare 81, xylem 67 and the key matrix 68, the present invention is not limited to these configurations.For example, neighboring terminal spare 81 was not fixed to the situation on xylem 67 or this key matrix 68 before the present invention also may be used on, simultaneously upper plate 66 and xylem 67 are by being in the same place such as cementing agent is fixed to one another, make the fixing deterioration between its this upper plate 66 that might prevent that variation or key pressing operation owing to environmental baseline from causing and this xylem 67, the front end that can prevent this key structure 200 thus produces fault, thereby guarantees the desirable durability of this key structure 200.

In order to reduce uneconomic use of the timber that is used for this xylem, and reduce the size and the height of this key structure thus, the set-up mode of this xylem is not limited to the form shown in Fig. 6, also can be the variant II-6 shown in Fig. 9.

Fig. 9 is the right view according to the front end of the key structure of the variant II-6 of second embodiment.The key structure of this variant II-6 comprises xylem of being made by timber 99 and the key matrix 101 with a top, and this xylem 99 is fixed on this top; With a upper plate 127 that is fixed to this xylem 99.In variant II-6, this xylem 99 so is provided with, and makes the lower surface 99b as the foot of this xylem 99 be arranged to be higher than the lower end 98a of this preceding neighboring terminal spare 98.In this respect, this variant II-6 identical with shown in Fig. 6.

When the white key as the vicinity of this key structure is pressed, and the key of this vicinity is when being positioned at key and pushing final position, and the key of this adjacent keys is pushed the position (after this being called " adjacent keys is pushed surface location ") on surface and represented by " L2 ".In side view, the adjacent keys of the key that this is pressed is pushed the intersection point of surface location and this xylem 99 and is represented with " P1 ".Distance table between the lower end 98a of the upper surface 99a of this xylem 99 and this preceding neighboring terminal spare 98 is shown " H3 ", distance table between this upper surface 99a and this feather key (keyslip) upper surface 102 is shown " H4 ", and the distance table between this upper surface 99a and this intersection point P1 is shown " H5 ".

Usually in piano, the foot of this preceding neighboring terminal spare is hidden and can not be seen by this feather key, and therefore keeps concerning H3 usually〉H4.In addition, in general piano, the front end of this adjacent keys can not be lower than this feather key in the operation of pressing key, and keeps concerning H4 thus〉H5.In addition,, in playing procedure, can not see that part of of the key of pushing surface location L2 that is lower than this adjacent keys in a side of this key structure, thus, because the existence of this xylem 99 provides wood appearance for this key.It is just enough that xylem 99 is arranged to be equal to or higher than when this key is not pushed adjacent keys is pushed surface location L2.

In view of the foregoing, suppose that this lower surface 99b as the lower end of this xylem 99 is a level when key is not pressed, preferably this lower surface 99b is set to highly as far as possible, and this lower surface 99b is not higher than this intersection point P1.Therefore, as shown in Figure 9, this xylem 99 is set to this lower surface 99b a shade below this intersection point P1.

According to variant II-6, it provides wood appearance can for this key, and reduces uneconomic utilization of the timber that is used for this xylem effectively, with size and the weight that farthest reduces this key structure.

Another variant as this variant II-6, this xylem 99 can be configured to this lower surface 99b the key of this adjacent keys push surface location L2 below extend, and the key that is basically parallel to this adjacent keys when this key is not pressed pushes surface location L2, as described later.

The angle of uneconomical utilization that only is used for the timber of this xylem from minimizing, this upper plate 127 just can be used as a keeper keeping this xylem 99 regularly separately, and this key matrix 101 needn't provide as keeper.

Below, the third embodiment of the present invention will be described.Figure 10 shows the sectional view of structure of the key board unit of the key structure that comprises a third embodiment in accordance with the invention.This key structure 400 according to the 3rd embodiment for example is configured to a B key.Figure 10 is the right view of key structure 400.This key structure 400 is applied to a white key, but the structure of this key structure 400 also can be applicable to a black key.In the following description, the side towards the player of this key board unit and bond structure 400 is called as " front side ".

This key structure 400 is constructed to: the xylem of being made by wood 54 is fixed to the top as the key matrix 55 of keeper, and also is fixed to this xylem 54 as the upper plate 125 of keeper.This upper plate 125 is by forming as the preceding neighboring terminal spare 128 of anterior (towards player's a end) and the upper plate 53 that provides key to push the surface, and they are made by synthetic resin and form as one each other.This upper plate 125 and this key matrix 55 have formed " keeper " that keeps this xylem 54.Should can form separation member with this upper plate 53 by preceding neighboring terminal spare 128.This xylem 54, itself and this upper plate 53 has roughly the same longitudinal length, is bonded to the lower surface and the rear surface of being somebody's turn to do preceding neighboring terminal spare 128 of this upper plate 53.

This key matrix 55 is made by synthetic resin, and has roughly the length identical with this xylem 54.The lower surface of this xylem 54 is attached to the upper surface of this key matrix 55.In addition, this key structure 400 be configured to its front end can be around pivotal part 21 vertical moving that are arranged on these xylem 54 rear portions.

This panel piece 76 is arranged on this key structure 400.This panel piece is provided with unshowned a plurality of executive component and a display part, and simultaneously the parts at this key structure rear are hidden as hiding parts.Therefore, between this player's one side and this pivotal part, this key structure 400 is positioned at part before this panel piece 76 as " visible parts R1 ", be visible from the outside when playing and not playing, and the parts at the rear of this panel piece 76 is " invisible parts R 2 ".

Parts as key returning spring 57 of key functional part and so on are arranged on framework 56 upper surface 56a.This key returning spring 57 is always upwards oppressed this key structure 400, and the key structure 400 that will be depressed thus is returned to its initial position.This key returning spring 57 is contained in the groove 58 that is arranged at these key structure 400 rear ends.

More particularly, in " invisible parts R 2 ",, be formed with a groove 54a, and this key matrix 55 also is formed with groove 55a along this groove 54a therein, forms groove 58 thus corresponding in the xylem 54 of these key structure 400 rear ends that part of.This key returning spring 57 places between the upper surface 56a of this groove 55a bottom and this framework 56.Here suppose this key returning spring 57 when under predetermined condition (for example, during key is pushed) when the length of about H2 was arranged, it was in normal state.In the example shown in Figure 10, the distance between the bottom of this groove 55a and the upper surface 56a of this framework 56 equals H2, so this key returning spring 57 is correctly installed.

Yet if this groove 58 is not set, and the lower surface of this key matrix 55 is straight on its whole length direction, and the distance that this key returning spring 57 extends is H1, that is to say, the distance that is used to install this spring 57 is not enough.Therefore, be necessary to design this key board unit, make the part of this key structure 400 upwards rise or with this framework 56 at a distance of a distance that increases, thereby guarantee this distance H 2.

In the present embodiment, as shown in figure 10, because this groove 58 is provided, the distance between this framework 56 and this key structure 400 can be provided with shortlyer, even this key returning spring 57 is being installed.This has saved the space on the vertical direction.In addition, by the recessed amount of groove 58, can reduce uneconomic use of the timber that is used for this xylem 54, to alleviate the weight of this key board unit thus.Further, groove 58 is set, thus, has guaranteed the good wood appearance of this key at this invisible R2.

The present invention is not limited to this key returning spring 57 and is contained in structure in this groove 58.In addition, be used for realizing that one or more function keys of this key operation can be contained in one or more similar grooves, for example bond switching actuated piece, mass member actuator, prevent that come off part and side-looking thereof of key from being the S shape spring of S shape, it is used for key and hammer are pressed to separately pivot; Also have sensor element, detector member or the like in addition.Especially, when be equipped with such as the spring of this S shape, in a longitudinal direction during long functional part, less space constraint is just arranged in vertical direction, it has also caused the saving in space in the vertical.

According to present embodiment, can reduce the size and the weight of this key board unit, wood appearance is provided for simultaneously this key.

Although in the 3rd embodiment, show a kind of example, wherein keep the keeper of this xylem to form as separation member by upper plate 125 and key matrix 55 with being used for fixing.This is not restrictive, and the present invention can be used for the structure that this xylem can be kept separately by this upper plate, or xylem keeps by a keeper, and this keeper is formed by integrally formed each other upper plate and key matrix.

Figure 11 is the partial section of key board unit, and its this key board unit includes the key structure of a fourth embodiment in accordance with the invention.The difference of the 4th embodiment and the 3rd embodiment is the shape of the groove of this key structure, and the shape of this xylem and this key matrix is also different thus.These two embodiment structure in other respects is all identical.

As shown in figure 11, the key structure 500 according to the 4th embodiment comprises: as the key matrix 63 of keeper, be fixed to the xylem 62 and the upper plate 125 that is fixed to this xylem 62 on these key matrix 63 tops.Each self-structuring of this upper plate 125, framework 56, key returning spring 57 and panel piece 76 all relative configurations with the 3rd embodiment is identical.This upper plate 125 and this key matrix 63 have formed " keeper " that keeps this xylem 62.

In Figure 11, the key when on behalf of contiguous white key, symbol " L1 " be pressed against key and push final position as key structure is pushed surface location.The lower surface 62a of the part of this xylem 62 before this panel piece 76 is on the slope from the front end to the rear end and rises.When this key was not pressed, this lower surface 62a was positioned at this adjacent keys and pushes under the surface location L1 in the gamut of longitudinal direction, and extension in parallel basically.This can eliminate uneconomic use of the timber that is used for this wooden key 62 effectively when guaranteeing wood appearance.In addition, the rake 63a of this key matrix 63 is attached to the lower surface 62a of this xylem 62, and pushes the same angle of surface location L1 inclination with adjacent keys.

This is just between this key structure 500 and this framework 56, and the rear portion from this rake 63a of this key matrix to this key structure 500 has formed a groove 64 than large space.It is invisible part that this adjacent keys is pushed surface location L1 part downward and backward, and this groove 64 is formed on this invisible part, and therefore the outward appearance of this key can not be adversely affected, and can guarantee fabulous wood appearance.

Similar with the 3rd embodiment, this key returning spring 57 is installed in this groove 64.In the fixing position of this key returning spring 58, the vertical length of this groove 64 (highly) equals this groove 58, and therefore similar with the 3rd embodiment, can save in the vertical direction implementation space.In addition, this groove 64 is seen Figure 10 greater than this groove 58(), it has further reduced the invalid use of the timber that is used for this xylem 62.

This groove 64 can take enough big and sufficiently high zone, and therefore a key can be set therein depresses/discharges detecting sensor (bond switching or omnidistance sensor (full stroke sensor), this whole process sensor is used for being pointed the key that a time point of pressing pointed the time point of release to key from key and pushes process, detects the position of key).

Present embodiment not only provides the beneficial effect identical with the 3rd embodiment, that is to say, wood appearance is provided and has reduced the size and the weight of this key board unit to key, and using minimum timber just can guarantee fabulous wood appearance for this xylem, to save the timber that is used for this xylem effectively.

Similar with the 3rd embodiment, the functional part that is contained in this groove 64 is not limited to this key returning spring 57.

Among first to the 4th embodiment of Miao Shuing, what relate to so far provides wood appearance to key in the above, and this xylem needn't be made by timber, and it also can be made by wood materials.For example, can adopt wooden engine turning plate (woodgrain decorative panel) (comprising printed board (printed panel), film coated plate (coated panel), paint plate (painted panel) and sliced veneer (sliced veneer)), scale board, medium density fibre board (MDF) (MDF) or the like.

Claims (8)

1. a key structure (200) is used for the key as work pivoting action under the operation of pressing key, comprising:

One key matrix (68) has a top and towards player's a end (68a), described key matrix is made by synthetic resin;

One xylem (67) has the described top that a front end and described xylem are fixed to described key matrix; With

Neighboring terminal spare (81) before one is fixed to the front end of described xylem, described before neighboring terminal spare make by synthetic resin, described before the lower end (81a) of neighboring terminal spare (81) be positioned at the below of the lower surface (67a) of described xylem (67),

Wherein, the described lower end (81a) of neighboring terminal spare and described key matrix (68) are provided with a predetermined gap (CL1) along the longitudinal direction of described key matrix between player's described end (68a) before described.

2. key structure as claimed in claim 1 (200), described key matrix has lower surface (68aa) towards player's described end (68a),

Wherein, before described neighboring terminal spare along described xylem extend to, see from the front described before neighboring terminal spare and described key matrix position overlapped and

Wherein, the described lower surface (68aa) towards player's described end (68a) of described key matrix be lower than described before the described lower end (81a) of neighboring terminal spare.

3. key structure as claimed in claim 2, wherein, this bond structure physical efficiency is installed in the key board unit, this key board unit has a locating part (183) that is formed on wherein, and have towards player's a end, this locating part is set directly at described key matrix under the described lower surface of player's described end, and is used for and this lower surface adjacency, with the key that limits this key structure push final position and

Wherein, neighboring terminal spare is positioned at the place ahead towards player's described end of described locating part before described.

4. a key structure (300) is used for the key as work pivoting action under the operation of pressing key, comprising:

One key matrix (97) has a top and towards player's a end (97a);

One xylem (95) is fixed to the described top of described key matrix, and described xylem has towards player's a end (95b), and the described end towards the player of this xylem has a lower surface (95a); With

Neighboring terminal spare (96) before one, be fixed to described xylem towards player's described end (95b), described before neighboring terminal spare have a lower end (96a),

Wherein, the place ahead that is positioned at described key matrix towards player's described end (95b) of described xylem towards player's described end (97a), make the described lower surface towards described player's described end (95b) of described xylem be exposed, and

Wherein, the described lower surface (95a) towards player's described end (95b) of described xylem be positioned at be lower than described before the position of described lower end (96a) of neighboring terminal spare (96).

5. key structure as claimed in claim 4, wherein, described preceding neighboring terminal spare is fixed to the described end of described xylem towards the player.

6. a key board unit comprises:

A plurality of keys, one of them of described at least a plurality of keys formed by key structure as claimed in claim 1.

7. a key board unit comprises:

A plurality of keys, one of them of described at least a plurality of keys formed by key structure as claimed in claim 2.

8. a key board unit comprises:

A plurality of keys, one of them of described at least a plurality of keys formed by key structure as claimed in claim 4.

Images