CN1032169C - Keyboard assembly for electronic musical instrument - Google Patents

Keyboard assembly for electronic musical instrument Download PDF

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Publication number
CN1032169C
CN1032169C CN 93117785 CN93117785A CN1032169C CN 1032169 C CN1032169 C CN 1032169C CN 93117785 CN93117785 CN 93117785 CN 93117785 A CN93117785 A CN 93117785A CN 1032169 C CN1032169 C CN 1032169C
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China
Prior art keywords
key
keyframe
assembling
described key
framework
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CN 93117785
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CN1086035A (en
Inventor
吉永宪市
三岛顺一
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Yamaha Corp
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Yamaha Corp
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Priority claimed from JP5104868A external-priority patent/JP2848186B2/en
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Abstract

An keyboard assembly for an electronic musical instrument is mainly constructed by a key frame, a key, a key switch and an assembly guide member. A fixing portion of the key is supported by the key frame such that a front portion of the key can be freely rotated up and down. An actuator is attached to and projected downward from a lower side of the key. The key switch (or a key-depression sensor) has an elastic projecting portion at its upper end. This key switch is provided on the key frame and is driven by the actuator, which depresses down the elastic projecting portion of the key switch when the key is depressed down. The assembly guide member guides the key when the key is moved in an assembling direction (i.e., a longitudinal direction of the key) in order to carry out an assembling operation to assemble the key and the key frame together.

Description

Keyboard assembly for electronic musical instrument
The present invention relates to a kind of key board unit that is used for such as the electronic musical instrument of pianotron.
General structure according to employed conventional keyboard in electronic musical instrument, the key framework that utilization is fixed on this musical instrument main body supports a plurality of keys, bond switching, key detent and key guide member etc., thereby and supports in these keys each by the key framework and make it freely to rotate around a predetermined fulcrum.On this key framework, provide a bond switching that is connected with described key.When pressing each key, drive corresponding bond switching, thereby produce a keyed jointing messenger.
The open communique 3-108295 of U.S. Pat P5131308 and Japanese Utility Model discloses a sectional view of described key board unit physical construction shown in Figure 1.Provide a key guide member 11 in the forward position of key framework 8 part, its effect is to avoid contingent teeter or reverse when pushing certain key.Key framework 8 is made by rectangular metal plate.The apical margin of described key framework 8 partly is crooked and utilizes one deck resin molding to cover the sweep of this framework, thereby finally forms described key fairlead 11.Perhaps the sweep of this key framework just is formed from a resin itself, subsequently, with the sweep of contacted this key framework of described key by a kind of covering of flexible resin, thereby make described key fairlead 11 will finally become the part of described key framework.Bond switching 10 is installed on the circuit board 81 to form a switch circuit devices.This switch circuit devices is by screw 82 firm being fixed on the described key framework 8.Described bond switching 10 comprises one by the raised member of making such as the rubber elastomeric material.When described key is pressed,, the detent that is connected with key 1 lower surface 6 makes this raised member distortion thereby pushing the described raised member of described bond switching 10 downwards.Like this, will make a plurality of inner contact (not shown) of described bond switching 10 contact with each other mutually, thereby make described bond switching 10 be switched on.
Guide member 4 is formed the part of described key 1, and protrudes out from the lower surface of described key 1.When described key 1 is pressed, described guide member 4 under the guiding of the key fairlead 11 of described key framework 8 to lower slider.Braking element 5 is as the part of guide member 4 and form.When described key 1 when the position that is pressed is returned, described brake component 5 contacts with described key fairlead 11, thereby forms the upper limit detent that is relevant to described key 1.By the way, member 3 is designated as a black key.Described key 1 (being white key) has one from the bossing 7 of public basicosta part 2 to lower convexity.Described public basicosta partly is provided in the rear edge part of described key.This bossing 7 is embedded into hole 9, and this hole forms in the predetermined rear edge part of described key framework 8, subsequently, utilizes screw 83 that described key 1 and key framework 8 are fixed up.
When described key 1 and key framework 8 are assembled into a time-out, the bossing 7 of described key 1 temporarily is installed on the described key framework 8, subsequently, described key 1 along continuous straight runs on described key framework 8 slides, thereby make guide member 4 match with described key fairlead 11, after this, projection 7 is embedded in the hole 9.As mentioned above, because the shape of guide member 4, described key 1 should horizontal direction slide on described key framework 8.In other words, detent 5 from described guide member 4 to (being the left direction of Fig. 1) horizontal-extending in the other direction.Like this, have the guide member 4 that is similar to alphabetical L type and match with described key fairlead 11 in order to make, described key should be just before described key board unit is assembled into together along moving horizontally in the other direction.
When assembling traditional key board unit, some bottom surface section of described key 1 and driver 6 moves horizontally with respect to the described bond switchinges 10 that contact each other again simultaneously from described key framework 8 projectioies, and they are fixed to together subsequently.Because this fixed form, described bond switching 10 produces the distortion of horizontal direction sometimes.If described key 1 and key framework 8 are fixed to together with this fixed form, so described bond switching 10 just can not be worked well, this just feasible function that can not carry out described bond switching 10 fully.In order to overcome the aforementioned caused distortion of power that when described key 1 and key framework 8 are fixed together, produces in the horizontal direction, conventional art provides some precautionary measures, by these precautionary measures, the thickness of the rubber wall of described bond switching 10 is reinforced by the hardness of the increasing or the rubber that uses, perhaps, for same purpose, need to utilize stronger power that described bond switching 10 is fixed on the described key framework 8.At United States Patent (USP) 4,914, disclosed another precautionary measures in 999, in this patent, described key is vertically moved down into described key framework, and then, described key is embedded into to be connected on the described key framework.For this reason, the structure that is similar to valve of the particular design that is used for described key framework, bond switching and circuit board is provided, thereby together the time, making described brake component 5 to move down smoothly described key and key frame fixation along described key fairlead 11.
Yet if the thickness of the rubber wall of bond switching 10 is strengthened or described bond switching 10 uses vulcanies to make as mentioned above, desensitization will be lowered under the key.Be used for described bond switching and the quantity of key frame fixation fixture together and the quantity of being taken steps for described bond switching and key framework being linked together securely, should increasing.In addition, with described key and key frame fixation to a time-out, the staff should pay special attention to not make the parts of described key to touch described bond switching.A kind of like this fixing operation of complexity needs a lot of man-hours, perhaps requires the staff to have very high hand skill.
In the aforementioned techniques that is disclosed in above-mentioned United States Patent (USP), the structure of described key unit and key frame unit is very complicated, and when forming a key framework, needs very complicated processing.In addition, when with described key and described key frame fixation to a time-out, brake component also will pass a part that is similar to valve.This operation all needs each key in all keys.Therefore, disclosed this technology is owing to its complicacy suffers damage.
Therefore, a fundamental purpose of the present invention is exactly that a kind of key board unit that is used for electronic musical instrument will be provided, in this key board unit, when described key and described key frame set are installed to a time-out, by apply an external force to described bond switching, make this bond switching can avoid distortion.
According to the basic structure by key board unit given to this invention, it includes a key, a key framework, a key decline sensor, a driver and a key fairlead.The fixed part of described key is by described key frame supported, and the previous section of this key just can freely be rotated up and down like this.Described driver is connected to the lower surface of described key, and described key decline sensor is connected on the described key framework.When pushing described key downwards, the described key decline of described driver drives sensor, thus experience a key decline situation.Described key decline sensor can be designed to a bond switching with bossing of being made by resilient material.Like this, when described key is pressed, described driver will be pushed the bossing of described bond switching and partly make its distortion, thereby make this keyed jointing logical.
When described key and described key frame set are installed to a time-out, utilize described fairlead to guide described key, thereby make when described key when this key length direction moves, described driver does not directly contact with described bond switching.Like this, just may avoid during the assembly working that described key and key frame set is installed to together, described external force being added to described bond switching.
By with reference to comprising the following description that accompanying drawing carried out of most preferred embodiment of the present invention, other purpose and advantage of the present invention will become clearly.Wherein,
Fig. 1 is an assembly drawing, and it shows the assembly operation of being implemented between the key unit and key frame unit in traditional key board unit;
Fig. 2 is an assembly drawing, and it shows the assembly operation that will implement according between key unit in the key board unit of first embodiment of the invention and the key frame unit;
Fig. 3 (A) is a side perspective view, and it shows the detailed structure of a key fairlead;
Fig. 3 (B) shows the shape of a brake component;
Fig. 4 (A) shows the another one example of described key fairlead;
Fig. 4 (B) shows the another one example of described brake component;
Fig. 5 (A) is a side perspective view, and it shows the detailed structure of a device guide element;
Fig. 5 (B) shows another example of described device guide element;
Fig. 6 (A)-6 (D) shows the step that is used to assemble the assembling process of described key board unit according to first embodiment of the invention;
Fig. 7 (A)-7 (B) shows another example that is used for described key board unit is carried out the step of assembling process;
Fig. 8 shows another routine sectional view of described key board unit;
Fig. 9 (A)-9 (C) shows the assembling process step that is used for another keyboard structure example shown in Figure 8;
Figure 10 (A)-10 (B) shows another example that is used for another routine assembling process step of described key board unit;
Figure 11 shows and remains another routine sectional view of described key board unit;
Figure 12 (A)-12 (B) shows the different examples of employed vertical direction assembling guide member in key board unit shown in Figure 11;
Figure 13 shows the use-case that makes of a boss that has a conical assembling guide member;
Figure 14 shows the described another one that has the boss of conical assembling guide member and makes use-case;
Figure 15 shows the plan view of a formed guide channel and a hole shape in described key framework;
Figure 16 (A) shows the inserted mode that a boss is inserted into a hole on the described key framework;
Figure 16 (B) shows another example of the shape in the described guide channel that forms and described hole in described key framework;
Figure 17 (A)-17 (F) shows the step that is used to assemble assembling process that key board unit shown in Figure 11 carries out;
Figure 18 (A)-18 (F) shows another example that is used to assemble assembling process step that key board unit shown in Figure 11 carries out;
Figure 19 is an exploded perspective illustration, and it shows two key members are assembled into together assembly operation;
Figure 20 is a plan view, and it shows the main part according to the key framework that uses in the key board unit of second embodiment of the invention;
Figure 21 is a side view, and it shows the assembled state of described key board unit.
Figure 22 is a side perspective view, and it shows described key apparatus and the key framework that is not assembled into together;
Figure 23 is a side perspective view, and it shows an example of described key apparatus rear edge part;
Figure 24 is the sectional view of key apparatus shown in Figure 23;
Figure 25 (A)-25 (C) is several side views, and it shows an example that described key apparatus and described key frame set is installed to assembling process together;
Figure 26 (A)-26 (D) shows the side view of the another example of assembling process;
Figure 27 shows the side perspective view of the another example of described key apparatus;
Figure 28 shows the side perspective view that remains the another example of described key apparatus;
The side perspective of Figure 29 illustrates an example corresponding to the described key framework of key apparatus shown in Figure 28;
The side perspective of Figure 30 illustrates the described key apparatus that is not assembled into together and another example of described key framework;
The side view of Figure 31 (A)-31 (C) shows an example that key apparatus shown in Figure 30 and key frame set is installed to number of assembling steps together;
The side view of Figure 32 shows another example that remains described key board unit;
Figure 33 is an exploded view, and it shows a plurality of rear edge parts that are assembled into described key unit together especially;
Figure 34 is a lateral plan, and it shows the example of the fixed head that is used for key board unit shown in Figure 30;
Figure 35 is an exploded view, and it shows together three key units of being assembled into according to third embodiment of the invention;
Figure 36 is a partial view, and it shows the main part according to the key board unit of fourth embodiment of the invention;
Figure 37 is a side view, and it shows the main part according to the described key board unit of the modification of fourth embodiment of the invention;
Figure 38 is a side view, and it shows the main part according to the described key board unit of another modification of fourth embodiment of the invention;
Figure 39 is a partial view, and it shows the switching device as the described bond switching relevant with described key board unit according to fifth embodiment of the invention;
Figure 40 is a side perspective view, and it shows an example of described switching device, in this switching device, has disposed a plurality of elastic bumps members continuously with square between predetermined;
Figure 41 is a partial view, and it shows another switching device that is made into two logical contact type touch-responsive switches;
Figure 42 is a partial view, and it shows an example of described key board unit, and in this key board unit, described switching device is used as described bond switching;
Figure 43 is a partial view that shows described another example of switching device;
Figure 44 is a partial view that shows described another example of switching device;
Figure 45 is a side view that shows according to the key board unit of sixth embodiment of the invention; With
The side perspective of Figure 46 illustrates the major part according to the described key board unit of sixth embodiment of the invention.
Below, with reference to the accompanying drawings most preferred embodiment of the present invention is described, in these accompanying drawings, identical part is with designated identical label.
(A) first embodiment
Fig. 2 is an assembly drawing, and it shows the sectional view that is assembled into described key unit together and another sectional view of described key frame unit.All keys that use in this key board unit are classified into three groups, and for these three groups of keys provide three pieces respectively, first is equivalent to a plurality of black keys, and these black keys are configured on the described keyboard side by side, wherein, provide an octave with 5 black keys.Second is equivalent to one group of white key, wherein Bai Jianzhong every one corresponding to will from a Bai Jianhang, selecting a white key.The 3rd is equivalent to other one group of white key, and this is organized white key and is not selected for second, by three public basicosta part 2a, 2b and 2c combination are assembled into together, these three pieces is assembled together.White key 1 provides a projection 7, this projection from the lower surface of described public basicosta part 2c to lower convexity.This public basicosta part 2c is provided in the rear edge part of described key 1.Described protruding 7 are embedded in the hole 9 with described key framework 8.Like this, described key unit and described key frame unit just are assembled into together.Provide a key fairlead 11 in the exterior region office of described key framework 8, when avoiding pushing described key 1, made it produce teeter or rotation downwards.When forming described key fairlead 11, the apical margin of the described key framework of being made by rectangular metal plate 8 partly is bent, then, this sweep is capped one deck resin molding material, perhaps, described key framework 8 with curved shape itself is made by described resin material, only covers its key contact part with flexible resin material then, thereby forms described key fairlead 11.On described key framework 8, in a plurality of keys each provides described bond switching 10.As previously mentioned, described bond switching 10 includes one by the bossing of making such as the rubber elastomeric material.This bossing is when described key is pushed, owing to the extruding of driver 6 is out of shape.Be attached with a moving contact at the inwall place of described bossing, and the position relative with moving contact provides a stationary contact in described bond switching 10 here.Like this, when described key was pushed, described moving contact contacted with described stationary contact, thereby transmitted the logical state of a key.Therefore, on the print circuit groove of the lower surface that is connected to described key framework 8, above-mentioned bossing is installed.Therefore, the apical margin of described bossing part raises up from the through hole that is provided in the described key framework 8.
Guide member 4 is as the part of described key 1 and be provided.When being guided by the described key fairlead 11 of described key framework 8, this guide member 4 can slide up and down.The braking element 5 that is used as the upper limit detent of described key 1 is used as the lower edge part of described guide member 4.When the key of being pushed returned its original position, described braking element 5 contacted with described key fairlead 11.
Incidentally, label 3 is specified a black key.
Fig. 3 (A) shows an example of the detailed structure of described key fairlead 11.Described key fairlead mainly is to be made of a guide member 14 and a braking member 15.Two lateral parts of this guide member 14 have formed a plurality of guidance surfaces, and by the guiding of these guidance surfaces, described key can move up and down.Described braking element 15 can be made as a big framework, to be used for a plurality of keys of configuration side by side.In addition, described key fairlead 11 can break away from described key framework 8 and moulding separately.In this case, after described key fairlead 11 is made into, by described key framework apical margin being partly embedded in the described braking element 15 along in the groove 15a of its length direction formation described key fairlead 11 being connected on the described key framework.On two low edge of described guide member 14 inclined-plane 16 of partly having located telogenesis, utilize this inclined-plane, described guide member 4 can perhaps be made described guide member 4 be assembled into described key fairlead 11 smoothly by the level and smooth guiding of described guide member 14.
In the middle of the guide member 14 of described key fairlead 11 is clipped in by the guide member 4 of described key 1.A tapering 13 shown in Fig. 3 (B) take shape in as described in guide member 4 lower edge part and form as described in the rim portion office of braking member 5.This tapering 13 helps described braking member 5 to be connected smoothly with described guide member 14.When described key unit and described key frame unit are assembled into a time-out, described braking member 5 is pressed towards described guide member 14.
Fig. 4 (A) shows another example of described key fairlead 11.In this example, a low edge along described braking element 15 has partly formed a tapering 17.Shown in Fig. 4 (B), the braking member 5 of described guide member 4 does not provide tapering 13 (seeing Fig. 3 (B)).Yet, by providing described tapering 13 to described braking member 5, can be so that described assembly operation be milder.In other words, by described tapering 17 is attached on the described braking member 15, can gently carry out described assembly operation, in this operation, described braking member 15 is pressed into described braking element 15.
During this period, assembling guide member 12 is formed and will extends from rib of described driver 6, this rib shown in Fig. 5 (A) by as described in the inwall of key 1 to lower convexity.Fig. 5 (A) and Fig. 5 (B) are two side perspective view, and wherein each all shows the detailed formation of described device guide member 12.By the way, each among this two width of cloth figure has all been represented the major part of inside under the expression situation that reverses of described key 1.Fig. 5 (A) shows an example, and wherein, for driver 6 provides a transverse ribs, Fig. 5 (B) shows the another one example, wherein, and for driver 6 provides two ribs.In each of this two examples, described device guide element 12 extends along its length from described rib.Described assembling guide member 12 is placed in following position, in this position, when described key unit and described key frame unit are assembled into a time-out, described assembling guide member 12 contacts with the upper edge portion of the described key fairlead 11 of described key framework 8.This assembling guide member 12 does not have the function that described driver can be pushed described bond switching 10.In brief, this assembling guide member 12 only has the effect of guiding described member when carrying out described assembly operation.
Fig. 6 (A)-6 (D) shows and the relevant corresponding steps of described key board unit assembling process.At first, shown in Fig. 6 (A), the projection 7 of described key 1 is installed near the described hole (seeing shown in the dotted line) on the described key framework 8.At this moment, the braking member 5 of described guide member 4 is placed in the top of the braking element 15 of described key fairlead 11.
Secondly, shown in Fig. 6 (B), by around described protruding 7 rotation described key 1 being pushed downwards, described protruding 7 are used as a fulcrum.At this moment, the apical margin of described braking member 5 part is compared with the previous position of the described braking member 5 shown in Fig. 6 (A) and will be produced slightly moving of (i.e. the right direction of this accompanying drawing) forward.Subsequently, the apical margin of described braking member 5 part will be along the front surface of the braking element 15 of described key fairlead 11 to lower slider.
By further pushing described key 1 downwards, make final arrival of upper surface of described braking member 5 have on the surface of braking element 15 lower surfaces shown in Fig. 6 (C).At this moment, the lower surface of described assembling guide member 12 contacts with the highest part of the guide member 14 of described key fairlead 11.In addition, described driver 6 is set at the top of the upper surface that leaves described bond switching 10.Therefore, in this state, described driver 6 does not contact with described bond switching 10.
Under described assembling guide member 12 was in the contacted state of the highest part with the guide element 14 of described key fairlead 11, described key 1 (i.e. the left direction of this accompanying drawing) backward slightly moved.Therefore, shown in Fig. 6 (D), described protruding 7 are finally embedded in the described hole of described key framework 8.Like this, assembly working has just been finished.At this moment, the braking member 5 of described guide member 4 is placed in and contacted certain position of the lower surface of described braking element 15, this position is defined as a upper limit, when described key 1 when the position that is pressed is returned, its rising moves to this upper limit position and is limited.The two has constituted the upper limit detent that is used for described key 1 jointly described braking element 15 and braking member 5.Be placed at described assembling guide member 12 guide member 14 that leaves described key fairlead 11 above state under, moving down mutually that therefore described assembling guide member 12 is produced when being pushed downwards with described key 1 do not disturbed.When described key 1 was pushed downwards, described driver was pushed and is made described bond switching 10 distortion, thereby drives described bond switching 10.
Fig. 7 (A)-7 (B) shows the another kind of assembling process that is used for described key board unit.The projection 7 of described key 1 is installed in shown in Fig. 7 (A) on the key framework 8 on certain position of position (seeing shown in the dotted line) for the L of distance in hole as described in the distance.In this state, described key 1 (i.e. the left direction of this accompanying drawing) backward moves, and its lower surface will slide and contact with the highest part with described guide member 14.As described in shown in Fig. 7 (A) the highest part of guide member 14 arrived along as described in key 1 length direction extend as described in driver as described under the situation of root of rib, aforementioned distance L between projection 7 and hole become equal the braking member 5 of described guide member 4 and will and described braking member 5 contacted described braking elements 15 between distance.In brief, after the rib of described guide member 14 and described driver 6 was in contact with one another, described key 1 moved in the horizontal direction distance L, slided on described key framework 8 simultaneously.
According to the state shown in Fig. 7 (A), described key 1 further to the left direction move, the highest part of described guide member 14 is then slided along the rib of described driver 6.Also to be moved to the left when like this, described key 1 rises outside.Subsequently, the highest part of described guide member 14 arrives the highest part of described rib.In addition.Shown in Fig. 7 (B), the final position that arrives described device guide element 12 of the highest part of described guide member 14.
If described key 1 continues left to move, will obtain the preceding a kind of state shown in Fig. 6 (C) so, then, shown in Fig. 6 (D), described key 1 finally is secured together with described key framework 8.
When the assembling process carried out as Fig. 7 (A) and 7 (B) shown in, described key 1 moves along continuous straight runs, and described guide member 14 will be mobile along the described rib slip of driver 6.For this reason, the angle of disobeying rapid rising removes to form the described rib that extends along its length.In other words, must form described rib with the angle of asymptotic inclination.
Fig. 8 shows another example of described key board unit physical construction.Different with previous example, this key board unit is designed to utilize a device guide rib 18 that breaks away from described driver 6 and dispose to replace aforementioned assembling guide member 12.
Fig. 9 (A)-9 (C) has represented the assembling process of this key board unit.At first, shown in Fig. 9 (A), the projection 7 of described key 1 is installed near certain position the described hole of described key framework 8 (seeing the dotted line indication).The braking member 5 of described guide member 4 places the top of the braking element 15 that leaves described key fairlead 11.
Then, shown in Fig. 9 (B) and with around as described in protruding 7 rotation make as described in key 1 rise.At this moment, the apical margin of described braking member 5 part and state shown in Fig. 9 (A) compare forward (i.e. the right direction of this accompanying drawing) do slightly to move.Therefore, the apical margin of described braking member 5 part is rotated along the front surface slip of the braking element 15 of described key fairlead 11.
By being moved further described key 1 downwards, the upper surface of described braking member 5 shown in Fig. 9 (C), arrive will be contacted with it as described in the lower surface of braking element 15.At this moment, described device guide rib 18 will contact with the highest part of the guide member 14 of described key fairlead 11.In addition, driver 6 is set at the top of the upper surface that leaves described bond switching 10.In this state, described driver 6 does not contact with described bond switching 10.
Under the contacted situation of the highest part of described device guide rib 18 and the guide member 14 of described key fairlead 11, described key 1 (left direction of accompanying drawing) backward moves.Subsequently, as shown in Figure 8, described protruding 7 are embedded into the described hole of described key framework 8, thereby finish described assembling process.At this moment, the braking member 5 of described guide member 4 does not contact with the lower surface of described braking element 15.When described key 1 when the position that is depressed is returned, the contact point between them has formed the upper limit of described key 1.In other words, described braking element 15 has formed the upper limit detent that is used for described key 1 with described braking member 5.In this state, described device guide rib 18 breaks away from the guide member 14 of described key fairlead 11, does not disturb thereby make the pressure key of this device guide rib 18 and described key 1 move mutually.Like this, when described key 1 was depressed, driver 6 was pushed and is made described bond switching 10 distortion, thereby drives described bond switching 10.
Figure 10 (A) and 10 (B) show the assembling process that is used for key board unit shown in Figure 8.Shown in Figure 10 (A), described protruding 7 are set at certain position of leaving described hole site (dotted line indication) on the described key framework 8.In this state, the guide member 14 of described key fairlead 11 contacts with the lower surface of described key 1.Subsequently, described key 1 moves backward, and the lower surface of described key 1 slides along the highest part of described guide member 14.Under the situation of device guide rib 18 long ribs root partly, described driver 6 did not arrive bond switching 10, thereby described driver 6 and described bond switching 10 are left mutually as described in guide member 14 arrived as described in shown in Figure 10 (A).
After this, to moving, the outermost of described guide member 14 then slides along described device guide rib 18 towards left in described key 1 continuation.Therefore, shown in Figure 10 (B), described key 1 when rising also to the left direction move.
By continuing to move described key 1 left, the highest part of described guide member 14 arrives the highest part of described device guide rib 18.Like this, just can obtain the preceding a kind of assembled state shown in Fig. 9 (C).After this, described key 1 moves as previously mentioned, thereby described key 1 finally is assembled into described key framework 8 as illustrated in fig. 8.
When the assembling process shown in execution Figure 10 (A) and Figure 10 (B), described key 1 horizontal direction moves, and described guide member 14 slides along described device guide rib 18.For this reason, the long rib part of described device guide rib 18 does not form with the angle of rapid rising, in brief, must form this long rib part with the angle of shelve.
In aforesaid example, design a kind of key board unit, made its guide member 14 and described assembling guide member 12 or described assembling guide rib 18 be in contact with one another.But, be possible thereby revise other direction that these examples make the position of described guide member 14 shift to except that described key 1 length direction.In this case, be designed to specially can be set at the position that described guide member 14 before had been set up with described group of device guide member 12 or assembling guiding structure bar 18 contacted protruding components.
Figure 11 shows another example of described key board unit.As previously mentioned, black key piece 21 and two white key pieces 22,23 are gathered together to form a key apparatus, and wherein said black key piece is equivalent to a plurality of black keys, and described white key piece is equivalent to a plurality of white keys.These key pieces are gathered in together, thereby make these all bond energys be disposed at enough abreast on the described keyboard.Figure 11 only shows a white key 1 and a black key 3, yet actual conditions are that a plurality of white keys and many people black key are disposed on the described keyboard abreast.
In order when described key unit and described key frame unit are combined, to avoid (being provided in the contact between 1 on the described key framework 8 at described driver 6 (being connected to described key 1) and described bond switching 10, to provide described assembling guide member 12 in the described mode of previous example, this example also provides one of lateral extension to strengthen rib 20.In the rim portion office of described key framework 8, provide one to press key guide member 14 (they being guide member 14), and when described key 1 was pressed, this guide member 14 is the described key 1 of (being the direction of pressing key) guiding vertically.In addition, provide a upper limit detent (being braking member) 5 for described key 1.
In this current example, hollow cylindrical silk braid 24 is configured in the public basicosta part of the described white key piece 23 of previous key device extreme lower position and stretches out downwards.This silk braid 24 can be equivalent to aforementioned protruding 7.Utilize described silk braid 24 and formed vertical direction assembling guide member 25 along the long axis direction of this silk braid.This assembling guide member 25 has the shape that is similar to skirt (or being similar to tapering), and like this, its root is less relatively, and the relative broad in its marginal portion.The purpose that described assembling guide member 25 is provided is for fear of an incident, in this incident, when being connected to described key piece 21,22 and 23 (being key apparatus) on the described key framework 8, described driver 6 is vertically moved roughly downwards by the top position from above-mentioned bond switching 10, thereby makes it possible to apply an external force to described bond switching 10 in the horizontal direction.
As previously mentioned, when described key unit and described key frame unit are assembled into a time-out, described chain 1 moves on level and vertical both direction, subsequently, described key 1 rotates around described fulcrum (i.e. the projection 7 that provides at the rim portion branch of described key 1), and finally make described protruding 7 to be embedded into the described hole 9 interior (see figure 2)s of described key framework 8, thereby finished described assembly operation (seeing Fig. 6 (A)-10 (B)).For partly bending also was placed under the described key framework 8 subsequently with described upper limit detent 5, it was necessary that the assembling of the above-mentioned complexity of described key 1 is moved.In other words, thus moving described key 1 simply makes that described protruding 7 vertical moving are impossible with the described hole 9 that embeds described key framework 8.Just before the described hole 9 of the described key framework 8 of described protruding 7 embeddings, the described driver 6 that is connected to described key 1 exactly is positioned at the top of described bond switching 10.Before reaching this state, because the effect of described assembling guide element 12 that works in the horizontal direction or assembling guide rib 18, described driver 6 has been avoided contacting with described bond switching 10.Like this, just may when carrying out described assembly operation, avoid described external force laterally to affact on the described bond switching 10.Its result just may improve the reliability of described bond switching 10 functions after complete and described key frame unit fits together with described key unit.
At this therebetween, when being inserted into described protruding 7 in the described hole 9 of described key framework 8, under the key that described upper limit detent 5 is placed in described key framework 8 and is provided pressed down situation under the guide member 14, described key 1 rotated around described upper limit detent 5.At this moment, described protruding 7 move down, and its side surface slip contacts with the marginal portion with described hole 9.According to described protruding 7 telescopinies to described hole 9, projection 7 moves with close described hole 9, and like this, thereby described key 1 horizontal (or horizontal direction) moves.Because this of described key 1 moves, described driver 6 finally applies an external force in the horizontal direction slightly and gives described bond switching 10.
Provide and work as precedent to avoid above-mentioned phenomenon, this phenomenon promptly be when described protruding 7 finally embed on the described key framework 8 described hole 9 time, described driver 6 will vertically move down roughly from the above-mentioned position of described bond switching 10, thereby causes described external force laterally to impose on described bond switching 10.Therefore, this example can be improved the reliability of described bond switching 10 performances.
Particularly, the silk braid 24 that is connected with key piece 23 provides a vertical direction assembling guide member 25 with similar taper, and when the edge part 30a in the described hole 30 of certain position that takes shape in described key framework 8 slided, described silk braid 24 descended in the tapered edge of described assembling guide member 25 part.Under the key that the tapering part 13 of described upper limit detent 5 is placed in described key framework 8 presses down situation under the guide member 14, when described key piece 23 rotates around the rotation center corresponding to described upper limit detent 5, structure with assembling guide member 25 of the taper of being similar to works, thereby makes the same distance of maintenance between the tapered edge part of described rotation center and described assembling guide member 25.Therefore, the described root portion that is similar to taper designs lessly.In other words, when described key piece 23 rotated around described center of rotation, the tapered edge of described assembling guide member 25 had partly constituted the part that annular is slipped device.By along the moving of described tapered edge part, make described silk braid 24 be embedded in the described hole 30 of described key framework 8.Because when described key piece rotates around described rotation center, between the tapered edge part of described rotation center and described assembling guide member 25, kept same distance, even coordinate mutually with described rotation and make described silk braid insert in the described hole 30, can not cause any power yet, do not have any power yet and put on described key piece 23, thereby described key piece 23 30 is moved towards the hole.Therefore, the driver 6 that is connected to described key 1 will vertically move down roughly from described bond switching 10 top positions that provided on described key framework 8, but during described driver 6 moves down, will not have any power and laterally act on described bond switching 10.
Figure 12 (A) and 12 (B) are two side perspective view, and wherein each all shows the shape of described assembling guide member 25.In these accompanying drawings, represented silk braid 24 is reverse with shown in Figure 11 comparing.Figure 12 (A) shows a kind of assembling guide member 25 that is made of rib shape thin-plate element.Low edge part 25a institute stretches out from the plane of the described edge part of stating silk braid 24, so as before with the described hole 30 of described silk braid 24 embeddings with the described hole 30 of described silk braid 24 horizontally-guideds.Should will slip into a hole 29 (this hole will be described in conjunction with Figure 15 and 16 in the back) by low edge part 25a.In addition, an auxiliary element 25b job is with broadening taper guiding face, to guarantee to be used for the guiding operation and the executive level guiding operation (this operation will be described below) gently of silk braid 24.This auxiliary element 25b can be accompanied by the whole length of described tapered edge part and extend.
Figure 12 (B) shows another example of described assembling guide member 25, and this assembling guide member 25 roughly is configured to ellipse, and in this member, described apical margin partly is configured as greater than its root portion.The major function that is shown in this assembling guide member 25 of Figure 12 (B) is same as the major function of the described assembling guide member 25 that is shown in Figure 12 (A).
Figure 13 shows the use-case that makes with described silk braid 24 of assembling guide member 25 as mentioned above.According to this example, silk braid 24 is used as a fixture, is used for a described key and a lower casing 26 that constitutes a described electronic musical instrument main body part are fixed up.Here, described silk braid 24 has hollow shape and a cylindrical thread hole is provided.Quick attack screw 27 passes the described threaded hole that lower casing 26 is embedded into described silk braid 24, thereby makes described key framework 8 be fixed on the described lower casing 26.
Figure 14 show have described assembling guide member 25 silk braid another make use-case.In this example, the printed circuit board (PCB) 28 that the electronic circuit that is used to control described electronic musical instrument electronic sound is installed on it is fixed under the described key framework 8, and by described printed circuit board (PCB) 28 described key framework 8 and described lower casing 26 are fixed up, described quick attack screw 27 passes described printed circuit board (PCB) 28 and embeds described silk braid 24, thereby make that the key framework 8 of described lower casing 26 is fixed with each other, by the way, can make amendment to this example, get final product so that described printed circuit board (PCB) 28 only is connected on the silk braid 24 with screw.
Figure 15 shows the shape in described hole 30, and this hole forming is in described key framework 8, and described assembling guide member 25 can pass this hole and is embedded into.In this hole 30, provide guide channel 29, be used for described key piece and described key framework 8 are being assembled into a time-out, silk braid 24 horizontal direction on key framework 8 that is connected to described key piece is slided, and with its described hole 30 of leading.This guide channel 29 can be made into a through hole, and is similar to described key framework 8 of running through of described hole 30.Perhaps this guide channel 29 can be formed as the dished portion that means such as utilizing punching press form on described key framework.
The aforementioned lower edge part 25a of described assembling guide member 25 inserts and matches with described guide channel 29.According to the process of described assembly operation, from stating the described assembling guide member 25 of guide channel 29 guiding, thereby make the described silk braid 24 described hole 30 of finally leading.In described guide channel 29, the first edge width D 1Be provided with greater than the second edge width D 2Because this shape that is similar to tapering of described guide channel 29, even the lower edge part 25a of described assembling guide member 25 is at first embedded described guide channel 29 roughly, path narrows down owing to advance, so that also can make silk braid 24 embed described hole 30 exactly.In brief, the embedding operation of simplifying described silk braid 24 is possible.By the way, the width D in described hole 30 3Be complementary with the external diameter of described silk braid 24.
Figure 16 (A) and 16 (B) show the correction example in the hole 30 of running through described key framework 8 and forming.Shown in Figure 16 (B), utilize described hole 30 to form a lock hole 32, these holes meet at right angles and intersect mutually, and in brief, the attitude shape in these holes is similar to letter " L " shape.Shown in Figure 16 (A), utilize described black key piece 21 to constitute a hook 31 (described black key piece 21 is placed in the extreme higher position in described key piece 21,22 and 23).Described hook 31 is flexibly embedded in the described lock hole 32 and in this lock hole 32 and is tangled, thereby described key piece is fixed together with described key framework 8 securely.
Figure 17 (A)-17 (F) shows the step of described assembly operation.Utilize this step, provide the described white key piece 23 of aforementioned assembling guide member 25 to be connected on the described key framework 8.When the described key board unit of actual assembled, the previous key device that includes three key pieces is connected on the described key framework simultaneously.But, because the assembly operation relevant with described key apparatus is same as the assembly operation relevant with described white key piece 23, so, for convenience's sake, only describe the assembly operation relevant in detail with key piece in vain 23.In these accompanying drawings, dotted line is represented the edge part in the described hole 30 of described key framework 8, and described silk braid 24 can embed by these edge parts.At first, shown in Figure 17 (A), silk braid 24 is installed on the described key framework 8.According to this state, the rear edge part of described assembling guide member 25 slides along described guide channel 29 (seeing Figure 15), thereby silk braid 24 slides to hole 30 towards right direction as described in making shown in Figure 17 (B).Figure 17 (C) has represented a kind of state, and under this state, the rear edge part of described assembling guide member 25 has arrived the described edge position in (dotted line delimited) described hole 30.In this state, exactly that places the top of described bond switching 10 to be connected to the described driver 6 of described key piece 23.As previously mentioned, before described driver 6 arrives this position, under the effect of the described assembling guide member 12 that utilizes described driver 6 to form continuously in the horizontal direction, force described driver 6 not contact with described bond switching 10.
Under the state shown in Figure 17 (C), described key piece 23 rotates around described rotation center, this rotation center place described upper limit detent 5 near, and this upper limit detent 5 places the described key that is connected to described key framework 8 to press down under the guide member 14.Because the rotation of described key piece 23, subsidiary have the described silk braid 24 of described assembling guide member 25 to fall into the described hole 30 of described key framework 8.Figure 17 (D) shows a kind of state, under this state, the lower edge part 25a of described assembling guide member 25 a little fall in the described hole of described key framework 8, thereby described driver 6 is moved down directly over described bond switching 10, and described driver 6 is partly contacted with the key head of described bond switching 10.At this moment, described key presses down guide member 14 and also partly slides along the edge of described assembling guide element 12, partly embeds the inside of described key 1 then.In this state, a projection 61 of described driver 6 is meshed with the head part of described bond switching 10, thereby sets up good fixed relationship between described driver 6 and described bond switching 10.Therefore, even bump or vibration take place inevitably, also can not change this relation when moving down described key 1.Because this relation for making as a whole key, can be set up an equilibrium state automatically, whereby, the position of described bond switching 10 is used as a center of equilibrium.Figure 17 (E) shows a kind of state, and under this state, described key 1 descends, and the peripheral edge portion of described assembling guide member 25 partly slides along the edge in described hole.At this state, described driver 6 vertically descends roughly, pushes the key head part by the made bond switching 10 of resilient material simultaneously.Figure 17 (F) shows a kind of state, and under this state, described silk braid 24 is embedded in the described hole 30 fully.At this state, even the root of described assembling guide member 25 also can be embedded in the described hole of described key framework 8.With described silk braid 24 in the telescopiny of described hole, described driver 6 always moves down in the direction (or switch drive direction) perpendicular to described bond switching 10.Therefore, be used for described bond switching 10 without any masterpiece in the horizontal direction.In other words, the described bond switching of making 10 by resilient material laterally can not be squeezed and be out of shape.
Figure 18 (A)-18 (F) shows another example of described assembly operation step, by this assembly operation step, provides the described key 23 of the aforementioned silk braid 24 with described taper assembling guide member 25 to be connected on the described key framework 8.With shown in Figure 17 (A)-17 (F) before example different, the described assembling guide rib 18 that utilization is independent of described driver 6 has replaced by the continuously shaped described assembling guide element 12 of described driver 6.And the effect of described assembling guide rib 18 and working method had been described in conjunction with Fig. 8-Figure 10 (B).Under first state shown in Figure 18 (A), the upper edge portion that described key presses down guide member 14 directly contacts with the lower surface of described key 1.Like this, the degree of tilt of described key piece 23 must be greater than the degree of tilt of the described precedent of Figure 17 (A).But, with shown in Figure 17 (A)-Figure 17 (F) before example compare, described assembling guide member 25 is carried out essentially identical function in this embodiment.According to the state shown in Figure 18 (A), the described hole (seeing Figure 18 (B) and 18 (C)) of described silk braid 24 slips and the described key framework 8 that leads.When the rear edge part of described assembling guide member 25 arrived the edge part (seeing Figure 18 (D)) in described hole, described silk braid 24 descended, and the peripheral edge portion of described assembling guide member 25 is along the edge in described hole partly slide (seeing Figure 18 (E)) simultaneously.At last, shown in Figure 18 (F), the telescopiny of described silk braid 24 is done.As mentioned above, the described subsidiary structure that has taper to assemble the silk braid 24 of guide member 25 can mutually combine with described assembling guide rib 18 and use, thereby it is extended in the horizontal direction, described rib 18 be connected to described white key 1 inwall and with described driver 6 separate configuration.
Figure 19 is a parts exploded side skeleton view, and it shows the main part of described key apparatus.This accompanying drawing has been represented and two white key piece 22 and 23 relevant backplan.Utilize in described white key piece 22 and 23 each to constitute a plurality of white keys 34.In these white keys 34 each can both be rotated round the root of this key of being made by described resilient material.This accompanying drawing shows 3 white keys 34, and wherein, described key piece 23 provides an E key, and described key piece 22 provides a F key and a D key.A plurality of bossings 33 on described key piece 34, have been formed.Described key piece 22 provides a plurality of dished portions 37, wherein each is corresponding in the bossing 33 each, cooperatively interact respectively by means of described bossing 33 and described dished portion 37, when making described key 34 quilts and row arrangement, described key piece 22 and 23 can be stacked on together, and label 35 has been specified a pilot hole that matches with positioning convex 36.A plurality of ribs 38 are respectively from the madial wall projection of described dished portion 37.Form these some ribs 38 with a part as the described key piece of making by described resilient material 22.Owing to adopted the rib of making by described resilient material 38, so when utilizing described dished portion 37 to assemble described key piece 22 and 23 with cooperatively interacting of described bossing 33, described key piece 22 and 23 just can be fixed together securely.In Figure 19, described black key piece 21 (not shown) are placed under the described white key piece 22.Because described white key piece 22 that provides the public basicosta of this black key piece 21 of a plurality of black keys partly to be similar to a plurality of white keys are provided or 23 public basicosta part are so the explanation that is relevant to black key piece 21 has been omitted.Certainly, a plurality of ribs 38 in described black key piece, are also provided.It is possible a plurality of ribs 38 being provided and not providing described rib 38 in the inside of described dished portion 37 in the outside of described bossing 33.
(B) second embodiment
Figure 20 is a plan view, and it shows a key supporting member that is used for described key board unit according to second embodiment of the invention.On a key framework of making by metal material (being the key supporting member) 112, be equipped with one by (such as mylar etc.) the made flexible panel 113 of resin material, an edge part of described flexible panel 113 is to the lower side of inflection to described key framework 112, then, utilization places 1131 connectors that edge is partly located 1132 of folded part that institute's folded portions is connected to main panel 135 (seeing Figure 21).On flexible panel 113, by means of with these keys in each key depression sensor (being bond switching) that a rubber strip 114 of annexation can elastic deformation is all arranged to couple together.Described bond switching has disposed two stationary contacts that correspond respectively to two moving contacts with centralized system simultaneously to contain two moving contacts at its bossing on described flexible panel 113.Connect when pressing when being driven device 132 (will narrate in the back), two on-off elements of described bond switching 115 are certain time interval of conducting in succession, thereby makes described bond switching 115 can produce touch-responsive information.The said structure of the moving contact of described bond switching 115 can be used for stroke sensor.For example, cancellation contains the bossing of moving contact, utilize mirror to form the upper surface of described bond switching, and then a light reflection type optical sensor is fixed in the position of facing this mirror on the described flexible panel 113 with regard to each key in these keys.Like this, just can redesign the stroke sensor that can transfer key presses down stroke to described bond switching.As the key depression sensor, embodiments of the invention can use stroke sensor or an elder generation/back touch sensor rather than described bond switching.In brief, described key depression sensor is not limited to described bond switching.But for convenience's sake, present embodiment has still adopted described bond switching as the key depression sensor.
Side edge portions (being the right side part among Figure 20) with described key framework 112 has also disposed a plurality of key guide members 116, and each in them can be avoided the teeter and the rotation of described key downwards when described key is pushed.Label 117 has been specified a fixed orifice, utilizes this hole, and described key framework 112 can be fixed on each side part of the upper casing (not shown) that constitutes a described keyboard apparatus subject part.
The rear edge part of described key framework 112 (being the left part of Figure 20) is bent upwards, to form a upstanding portion 118.In the pre-position of described upstanding portion 118, be formed with a hook hole 119, by means of this hook hole 119, described key apparatus is firmly fixed.The fixed orifice 120 that is used for predetermined quantity that aforementioned lower casing is firmly fixed is formed at the corresponding position of described key framework 112.Determine the quantity of described fixed orifice 120, so that provide one or two hole for a plurality of keys corresponding to the acoustic tones in the octave scope.For example, silk braid 126 is embedded into by fixed orifice 120, and screw 1201 is screwed into this silk braid 126 from the downside of this silk braid 126.Like this, described key framework 112 and described lower casing just twisted massively solid together.
It is upwards folding that the predetermined portions of described key framework 112 rear edge parts is partly cut switch, to form a leader 123.The opening that label 122 expressions are cut out.On described key framework 112, described leader 123 is by crooked vertically upward.The upper edge portion of this leader 123 is further to the horizontal direction bending, thereby forms a support component 145 that will be used to support described upper casing.In addition, fixed orifice 124 passes described support component 145 and forms, so that support described upper casing securely.Employed pilot hole when by the way, label 125 has been represented the described key apparatus of assembling.
Figure 21 shows the partial view of a described key board unit.In this key board unit, described key is connected on the described keyboard frame 112, and described key apparatus and described upper and lower shell fix.Under the core of described key framework 112, provide a main panel 135, by means of a lining 134 described main panel 135 is fixed on the described key framework 112.Described flexible panel 113 is folded to the bottom of described key framework 112 backwards, and then, the described folded part of this flexible panel 113 is connected on the described main panel 135.Described main panel 135 is circuit boards that have such as various electronic circuits such as microcomputer, storage storage and sound source circuits.These circuit are used to carry out such as key and press down operations such as the operation of defined and musical tune control.
Described key apparatus 129 is connected on the described key framework 112, and mainly pushes away the key piece 1281,1282 and 1271 that superimposition partly locates to be assembled into together at described public basicosta mutually by three and form.Figure 21 shows two white keys 128,128a and a black key 127.
In the described white key 128 each all provides a driver 132 of pushing described bond switching 115 when this key is depressed.As the part of described key the first section, form and disposed slide guide element 146, thereby make key guide member 116 be sandwiched in wherein by them.The lower edge of described slide guide element 146 partly is bent, the braking member 147 that is in contact with one another with the lower edge surface that forms with described key guide member 116, thus make the returning to move and stop of the described key that returns from described key depressed position.In addition, on the inwall of described key 128, has a rib 133.Owing to adopted rib 133, so when described key along continuous straight runs slides with for described key and described key frame set are installed to a time-out, the upper surface of described key guide member 116 slides along described rib 133, thereby has avoided described driver 132 to touch described bond switching 115.
In described key apparatus 129, the flexible member 138 that a protruding hook 139 is provided partly stretches out from the public basicosta of described white key 128.This protruding hook 139 flexibly matches with upstanding portion 118 formed hook holes 119 of running through described key framework 112, so that described key apparatus 129 interfixes with described key framework 112.The key piece 1281,1282 and 1271 of described key apparatus 129 piles up mutually and utilizes screw 137 to be fixed.Like this, by means of hinge parts 136, make in the described key first partly be located by the public basicosta that described key framework 112 is supported in described key.Thereby making this bond energy enough press down direction (being vertical direction) at key upward freely rotates.
Simultaneously, the driving of execute key length direction and Width location between described key and key pivot frame.This location is the described hole 125 that provides between described key is provided and carries out with its corresponding protruding (not shown).If described key and described key framework a bit are secured together at certain, so, described protruding 123 and guide hole 141 just can not play a role well to stop the less rotation of described key unit.This rotation for the described key unit that stops to be firmly fixed at described key framework, present embodiment provides a fixed mechanism that is made of bossing 143, flexible member 138 and upstanding portion 118, by this fixed mechanism, described key unit accurately is fixed on the described key framework.By the way, an octave width for described keyboard provides two described fixed mechanisms.
During this period, utilize the silk braid (not shown) that from described upper casing 131, stretches out that described panel 1311 is fixed on the described upper casing 131.Described upper casing 131 provides a switch panel, and this panel comprises a plurality of tone color selector switch 1312 that are installed on the described panel 1311.
When assembling described keyboard as illustrated in fig. 21, described upper casing is turned around to be placed on the substrate (not shown), the described key framework 112 that fixes with described key unit also is squeezed, screw 1231 passes opening 122 and is embedded into, described screw 1231 hole 124 of the support component 145 that is provided in the described leader 123 also is provided and embeds, subsequently, this screw 1231 is embedded in the silk braid 154 that invests on the described upper casing 131, thereby the described key framework 112 that causes being fixed together with described key unit closely is connected together with described upper casing 131 securely.In this state, the described lower casing that is squeezed 130 is brought to the top of described key framework 112, and screw 1201 is embedded into silk braid 126, thereby makes described lower casing 130 closely connect securely with described key framework 112.Therefore, be used for the assembly working that described key unit, key framework 112, upper casing 131 and lower casing 130 are assembled into together thoroughly is finished.
Figure 22 is a side perspective view, and it shows the back part of a still unassembled described key board unit to together, and wherein, described key framework 112 represents with vertical view, and key apparatus 129 is illustrated by upward view.Figure 23 is the side perspective view of the part of a rear edge part that shows described key apparatus 129, and Figure 24 is the partial view of Figure 23.Pass the open basicosta part of three key pieces that wherein pile up and fit together and formed a guide hole 141 in certain pre-position that the leader 123 with described key framework 112 meets.Back edge direction at described guide hole 141 also is extended with a bossing 143.The office has formed a guide channel 142 in the lower surface of described bossing 143.Trailing edge inlet portion office at described guide channel 142 has formed a tapering 144.Like this, the intake section of described guide channel 142 is with extended.
The rear edge part of described bossing 143 is bent upwards to form a flexible member 138.This flexible member 138 can be in the elastic bending of key length direction.Also formed the hook 139 of aforementioned projection in the rear surface of described flexible member 138 part.The upper edge portion of described flexible member 138 also backward the spring song to form press element 140.The rear edge part of the described leader 123 that is cut out and is bent upwards from key framework 112 is configured an arc, to form the guidance surface 123a that its inner classes is similar to a taper.
Below, will describe with reference to Figure 25 (A)-25 (C) and be used for described key apparatus 129 and described key framework 112 are assembled into together number of assembling steps.For simplicity, in these accompanying drawings, omitted the expression of relevant black key.At first, slide along the highest part of the key guide member 116 of described key framework 112, make described key apparatus 129 move in the horizontal direction by guide rib 133.Shown in Figure 25 (A), the highest part of the described leader 123 that stretches out from described key framework 112 matches with the described guide channel 142 that takes shape in described key apparatus 129 hinder marginal part offices.
Then, shown in Figure 25 (B), described key apparatus 129 edge direction (being the left direction of accompanying drawing) backward slides, and like this, the back inner margin portion of described guide hole 141 has just arrived the rear edge part of the described guidance surface 123a of described leader 123.At this moment, the driver 132 of described key apparatus 129 breaks away from attached to the described bond switching 115 on the described key framework 112 and is positioned at its top.
According to the state shown in Figure 25 (B), described key apparatus 129 descends, thus as described in as Figure 25 (C) shown in, making like that the inner margin portion of guide hole 141 along as described in the guidance surface 123a slip of leader 123.In this case, the rear edge part of described key apparatus 129 descends in the mode of landing naturally, and the resistance that influences described key apparatus 129 descending motions in the horizontal direction roughly remains on zero level.Like this, the driver 132 of described key apparatus 129 descends from the top position of described bond switching 115, contacts thereby make described driver 132 flexibly enter with described switch 115.Therefore, there is not power to impose on described bond switching 115 in the horizontal direction.
After this, the braking member 147 of described key apparatus 129 (its effect is a upper limit detent) is placed under the lower surface of described key guide member 116, and the upper surface 1271 of public basicosta part was extruded for described black key provides, thereby made on the described hole 119 in the upstanding portion 118 that described protruding hook 139 flexibly is suspended to takes shape in described key framework 112.In this state, the basal surface of described open basicosta part contacts fully with the upper surface of the rear edge part of described key framework 112.Thereby between described key apparatus 129 and described key framework 112, set up as shown in figure 21, the fixed relationship of horizontal direction.In brief, according to the described key board unit of present embodiment by following design, between described key apparatus 129 and described key framework 112 with the contact site office that is formed, the extension elongation sum of the thickness of the rear edge part of described guide hole 141 and described extension 143 equal described upstanding portion 118 and the guidance surface 123a of the leader 123 that stretches out from described key framework 112 between distance.Therefore, under the contacted situation of upper surface of the basal surface of described key apparatus 129 and described key framework 112, described key apparatus 129 can not move on the horizontal direction of key, thereby makes that the horizontal level of described key apparatus 129 is firmly fixed with respect to described key framework 112.Because the protruding hook 139 of described flexible member 138 is grabbed the hook hole 119 of moulding to passing described key framework 112, so, the vertical movement of described key apparatus 129 can be regulated, and in other words, can avoid the incident that comes off of described key apparatus 129 during assembly operation.By the way, when re-moving described key apparatus 129 from described key framework 112, the extrusion element 140 of described flexible member 138 is pushed backward in face of the elastic resistance of described flexible member 138, thereby makes described protruding hook 139 deviate from from described hook hole 119.
As mentioned above, described bossing 143 and flexible member 138 are placed between the guidance surface 123a of described upstanding portion 118 and described leader 123, then, described guide hole 141 is along with described guidance surface 123a descends, like this, described key apparatus 129 just can be automatically along a predetermined direction guiding to the described key framework 112 of stating.
Figure 26 (A)-26 (D) shows another example of assembling process, by this assembling process, described key apparatus 129 is assembled into described key framework 112.Assembling process shown in Figure 26 (A) and 26 (D) is similar to the assembling process shown in Figure 25 (A) and 25 (B).Therefore, omitted detailed description here to them.After the number of assembling steps of having realized shown in Figure 26 (B), because the friction force or the difference between the grease spraying state of described key guide member 116 and braking member 147 that in some part, exist, be different from decline rate at the described key apparatus 129 of its back part in its decline rate of described key apparatus 129 of the first section.In some cases, the decline rate of the slip guide member 146 that provides at the exterior region branch of described key apparatus 129 will be faster than the rear edge part of described key apparatus 129.As mentioned above, if compare with the rear edge part of described key apparatus 129, the leading edge portion decline rate of described key apparatus 129 is very fast, and so, its assembled state is shown in Figure 26 (C).Figure 26 (C) shows the abominable worst state that descends of described key.But in general, during described key moved down, the part 1331 of the one-tenth pitch-angle of described rib 133 tendency can pass to described key apparatus 129 to the horizontal component of a power a little, thereby makes the rear edge part of described key and leading edge portion descend simultaneously.In brief, in the ordinary course of things, the sort of worst state shown in Figure 26 (C) is avoidable.But if the sort of state shown in Figure 23 (C) has taken place, the driver 132 of so described key apparatus 129 will descend in the mode that is close to the nature landing, thereby described driver 132 can be shown in the top of described bond switching 115.In this case, described driver 132 is placed in the position of leaving described bond switching 115 a little.In other words, even produce this transition state, also can guarantee not have in the horizontal direction power to put on described bond switching 115.Under the state that described key moves down, a very little horizontal component is delivered to described key, thereby causes the rear edge part of described key apparatus 129 to continue to descend.After this, the rear edge part of described key apparatus 129 descends to be similar to the mode shown in Figure 25 (C).In other words, when the guidance surface 123a of described leader 123 slided, described key apparatus 129 was to descend near the mode of landing naturally in the inner margin portion of described guide hole 141.Its result can obtain the state shown in Figure 26 (D).As previously mentioned, from the driver 132 of institute's key apparatus 129 after the top position attached to the bond switching 115 above the described key framework 112 moves down, the rear edge part of described key apparatus 129 further falls.Therefore, impose on the described bond switching 115 without any power in the horizontal direction.
Figure 27 is a side perspective view, and it shows another example of described bond structure rear edge part.In this example, do not provide guide channel in the bossing 143 that stretches out backward from described guide hole 141.When described key apparatus being assembled on the described key framework, described key is by with to the position shown in Figure 25 (B) or 26 (B) rather than slide on described key framework in advance.According to this state, when sliding attached to the leader on the described key framework 112 123, the rear edge part of described key apparatus descends in the inner margin portion of described guide hole 141.Like this, as 25 (A)-25 (C) or 26 (A)-26 (D) are described in conjunction with the accompanying drawings, described key apparatus descends in the mode near landing naturally, thereby makes the driver of described key contact with the upper surface of described bond switching 115.For this reason, the arch section or the tapering 148 that can be equivalent to take shape in aforementioned arc taperings 144 (seeing Figure 23) in the described guide channel 142 are taken shape in the described guide hole 141, so that enlarge the opening of described guide hole 141.In this example, the other parts except above-mentioned part are all similar with those parts of previous example, thereby can realize same operation and effect.
Figure 28 is a side perspective view, and it has represented another example of described key apparatus rear edge part.Figure 29 is a side perspective view, and it shows one and provides on described key framework 112 and corresponding to the detailed structure of the described leader 123 of key apparatus shown in Figure 28.In these examples, described leader is made by resin material, and with the separate and moulding of key framework, perhaps described leader 123 just forms the part of described key framework 112.In described key apparatus 129, the projection 151 back bossings 143 from described guide hole 141 stretch out downwards.For with described protruding 151 be complementary, on the upper surface of described leader 123, formed a guide channel 149.At the intake section of described guide channel 149, an arch section or tapering 150 have been formed.Provide hole 124 to be used to that described upper casing and described key framework 112 are interfixed.Bottom in described hole 124 provides a bigger through hole (not shown) to be complementary with described screw cap, and a less hole (not shown) that is used to guide described macropore also is provided, and like this, can avoid described screw cap to pass this hole.Pilot hole 152 passes described key framework 112 and takes shape in certain position of leaving described leader 123 described rear side surfaces.This pilot hole 152 can be equivalent to the preceding hole 125 shown in Figure 20.In the present embodiment, the location structure that is used for described key unit is provided between D key and the D# key.
Near the described guiding structural that provides between described G# key and the A key (seeing Figure 28 and 29), needn't form above-mentioned protruding 151 and described hole 152.At first, provide projection 151 shown in Figure 28 or corresponding to the projection of hole 125 (seeing Figure 20), in order to overcome, move and gently to carry out thereby make described key press down by the head contraction of the made described key unit of described resin material and the trueness error that takes shape in described through hole in the described key framework.In brief, provide these projectioies, like this, only use an anchor point just can satisfy the needs of location as location structure.
When above-mentioned key apparatus and key frame set are installed to a time-out, described key apparatus 129 then, is embedded in the opening of described guide channel 149 attached to the projection 151 on the described bond structure 129 towards described key framework 112 motions, at this opening part, formed an arch section 150.Then, described key apparatus 129 along continuous straight runs slide, thereby make described guide hole 141 and described leader 123 cooperatively interact.Be similar to previous example, the rear edge part of described key apparatus 129 descends in the mode that is similar to the nature landing.Under the situation that described key apparatus 129 lands fully, the projection 151 of described key apparatus 129 is embedded into the described pilot hole 152 of described key framework 112, simultaneously, the described protruding hook 139 of the described flexible member 138 described hook hole 119 of described key framework 112 of nipping.Like this, just can realize that described key apparatus 129 is with respect to the location of described key framework 112 on length and horizontal both direction.In addition, described key apparatus 129 also is fixed firmly to described key framework 112 in vertical direction.
In this example, described guiding structural and described location structure the two almost be provided in same position.Like this, just may between described key apparatus 129 and described key framework 112, accurately carry out assembly operation and positioning action simultaneously.Consequently assembly working can be at a high speed, accurately carried out.This is a very big advantage of this example.
Figure 30 is a side perspective view, and it shows another example of described key board unit rear edge part.According to this example, each in the described key all is separately connected on the described key framework 112.Public basicosta part 1531 places at key 153 provide described guide hole 141, flexible member 138 and the extrusion element 140 etc. that have described bossing 143 at its part place, back, and these are all similar with previous example.Near described key framework 112 rear edge parts, provide a leader 123 corresponding to a key.Described leader 123 can be independent of described key framework 112 and be made of described resin material, and perhaps, described leader 123 can be used as the part of described key framework and moulding.In Figure 30, omitted the described guide rib 133 that described key is slided in the horizontal direction in the diagram relevant by it with key 153.
In addition, the described hole 124 that is used to described upper casing and described key frame fixation are got up takes shape in an appropriate position of described leader 123 upper surfaces.For example,, provide two fixed orifices 124, and they are configured in the position that corresponds respectively to D key and A key in an octave key group for an octave.In Figure 30, the rear side surface of described leader 123 is vertical stands on described key framework 112.But, can modify described leader 123, so that it perhaps makes it constitute a kind of circular shape with respect to 112 one-tenth angle excursions of described key framework.
Figure 31 (A)-31 (C) will describe this linkage editor, and by present example, according to this program, key 153 assembles mutually with keyframe 112.For present example, many linkage editors are being provided, therefore will make detailed explanation with respect in them each.
(1) first kind of linkage editor
At first, when supporting with a finger, key 153 is extended to a certain position, and therefore, the projection 143 of key 153 contacts the upper surface of the targeting part 123 that fits on the keyframe 112.Add the support of finger, the gathering sill 142 of key 153 moves to the dropping point (dropping point) shown in Figure 31 (A).On this dropping point, actuator 132 just in time is placed on the bond switching 115.When targeting part 123 inserts pilot hole 141 or later, finger with key 153 separately.Afterwards, the rear edge part of key 153 almost falls by the mode that falls naturally, makes this key 153 with keyframe 112 contacts.Afterwards, the public basicosta part 153 of key 153 is depressed, and makes projecting hook 139 stick into dog hole 119.Like this, key 153 fully and keyframe 112 be installed together.
Repeat above-mentioned assembly manipulation for each key.After all keys are assembled together with keyframe fully, a public fixed head (referring to Figure 34), its length matches with the keyboard total length, and pressurized also is fixed to the rear edge part of this key.When the same shell fixedly the time, the keyframe of fixing this key is changed direction and is fixed on the shell.In this case, insert a screw by four thumb screws cover 154, this screw also is inserted in the hole 124 of the guiding mechanism 123 that fits on the keyframe 112, therefore goes up shell just with keyframe 112 jam-packeds together.Fixed head 155 provides many through holes 169 and screw hole 168.The quantity of through hole 169 equals the quantity of targeting part 123, and the quantity of screw hole 168 can be adjusted like this, promptly a screw hole 168 can be used for one, two or three keys, fixed head 155 is placed on the public basicosta part 1531, therefore, public basicosta part 1531 is to be clipped between fixed head 155 and the keyframe 112.Afterwards, a screw 1532 injects screw hole 168, and therefore, by means of public basicosta part 1531, fixed head 155 is fixed together with keyframe 112 securely.
(2) second kinds of linkage editors
At first, key 153 usefulness staff or mechanical arm are held, and afterwards, key 153 is installed on the keyframe 112 like this, and promptly public basicosta 1531 is fixed on the upper surface of targeting part 123, and slide-and-guide device 146 be fixed on key guides 116 near.In this case, gathering sill is fixed on the stem of this targeting part 123.Angle θ forms between the surface of the horizontal component of keyframe 112 and key 153.As mentioned above, this angle θ is defined as " θ 1 ".According to this situation, when the free edge part of key 153 was oppositely changed the position by staff or robots arm, angle θ progressively increased.Simultaneously, when the rear edge part of leading each hole 141 contacted the rear edge part of targeting part 123, this angle θ can be defined as follows: θ=θ 0＞θ 1.Figure 31 (B) represents this situation, and wherein, the rear edge part of key 153 just in time is fixed on before the setting point.For this situation, the height of the height of targeting part 123 or actuator 132 is to determine like this, i.e. actuator 132 and 115 contacts of different bond switching, and actuator 132 is settled a little from this bond switching 115.Afterwards, the further oppositely light pressurizeds of key 153 fall with keyframe 112 rear edge part of this key 153 and contact.The following step that this device is joined program is analogous to above linkage editor, therefore, will omit its explanation.
Secondly, with the existing embodiment superiority of detailed description.Usually, when considering component number, when switch drive precision and keyboard equipment gross thickness, be necessary design some keyboard equipments like this, the fixing and keyframe of its key is irrelevant, and the height of four thumb screws cover is lower.
In this existing embodiment, before the key reverse slide, angle θ equals θ 1, and this angle θ is θ 0, θ 0＞θ 1.
Just in time before key fell, actuator 132 was slightly from bond switching 115 for people's expectation.Even when actual design button apparatus structure, the distance between actuator and bond switching is set to 1mm, this distance should increase to 2mm, so that deal with the foozle of this button apparatus.In this case, the distance between actuator and bond switching increases 1mm, yet the height of targeting part 123 should increase 5-6mm, and this increase that is height owing to targeting part 123 is proportional to actuator and bond switching spacing changes.In existing example, keeping vertical positional relationship consumingly at actuator 132 and 115 of bond switchinges, and this is exactly before assembly manipulation is carried out, in other words, this is exactly before key falls.Therefore, can reduce the admissible distance range between them, thereby the distance between them can be arranged to 1mm.Even when constituting keyboard practically, the distance of so little 1mm is scavenged into zero roughly, between targeting part 123 and pilot hole 141, exist little gap, even thereby actuator 132 gently presses bond switching 115 to begin to fall mobile, such pressure until it at its horizontal side direction just in time to fall at this key and can fully be eliminated before moving.Therefore, might improve relation between key and keyframe.Moreover might make the thickness of littler button apparatus.
Figure 32 is the side view of the another keyboard equipment of explanation.According to first feature of this example, can simultaneously or carry out at once for the assembly manipulation of key unit and keyframe and positioning action.According to second feature, additional targeting part is in key.When key and keyframe were assembled together, interim detent can help this assembly manipulation to carry out sooner.In view of the above, existing example provides projection 1235, and it had both carried out the targeting part operation on function, carried out interim brake operating again, and wherein, the low edge that constitutes this projection 1235 partly is circular.This projection 1235 is designed under the low surface of the public basicosta of key unit.More precisely, between D key and D# key, provide a projection, and another projection is provided between G# key and the A key.Form a recess (or a through hole) 1125 in keyframe, wherein, the shape of this recess 1125 is designed to match with the round-shaped of projection 1235.Other parts of this example are similar to first preceding example (with reference to Figure 20,21,22,25 (A)-25 (C) and 26 (A)-26 (D)), therefore, will omit explanation.
Projection 1235 is led by recess 1125, afterwards, and by keyframe 112 provisional brakings.When projection 1235 was fixed on a certain position of keyframe 112, hook 139 sticked into by upstanding portion 118 and forms dog holes 119.Projection 1235 is fixed on the contact point, and at that point, its leading edge face contacts with the leading edge face of recess 1125, and the trailing flank of flexible member 138 is fixed together with upstanding portion 118, and like this, they are pressurized each other mutually.By means of the quality of fit that improves between dog hole 119 and the hook 139, might realize the positioning action between key unit and the keyframe fully.In this case, this key unit and keyframe are in all directions, and for example at the Width of key, vertical and vertical direction is fixed together.By the way, such location also can realize with respect to the quality of fit of two pairs of dog holes 119 and hook 139 well by means of improving, thus for another to dog hole and hook, on the Width of key, this dog hole can amplify slightly.Existing example provides two pairs of convexconcave parts with respect to the key unit that eight (sounds) degree keyboard is provided.For adjust moving of this key unit at the Width of key, provide a pair of convexconcave part as first engaging mechanism, in this mechanism, the width of projection is complementary with recess width, and to other a pair of convexconcave part, provides certain clearance.Adjacent first engaging mechanism, a pair of hook 139 and dog hole 119 are provided as second engaging mechanism, because first and second engaging mechanisms are provided, might determine the position relation between key unit and the keyframe fully.
Figure 33 is the stereographic map of the rear edge part of explanation keyboard equipment key assembling.Here illustrate that two key units 157 and 158 are assembled in together, wherein, key unit 157 provides a C key, an E key 163, one G keys and a B key (wherein, not showing C, G and B key), and another key unit 158 provides a D key 164, one F keys 165 and an A key (not shown).Omit the black key cell descriptions, but it can be arranged under the key unit 158.In stereographic map, back key unit is partly compared with white key, is in extreme lower position, and still, in the wiring layout shown in Figure 21 and 22, the black key unit is in the extreme higher position.Many projections form on the key unit 157 that E key 163 is provided.The recess 160 of many each corresponding projections 159 forms on key unit 158, and key 158 will be assembled together with key unit 157.In each recess 160, a stiffening rib structure 166 is arranged.When projection 159 engaged with recess 160, stiffening rib 166 was out of shape, damages slightly the outer wall of protuberance 159.Like this, both all are fixed together reliably by means of rib 166 for they, and pressurized each other.Numeral 161 expressions one projection, it is used to determine the position relation between key unit 157 and 158.The projection that provides in the recess 160 of key unit 158 is inserted in the pilot hole 162 that key unit 157 protuberances 159 upper walls form.In each key unit 157 and 158, all form many through holes 167.The through hole 167 of each key unit 157 and the through hole 167 of each key unit 158 are complementary.These through holes 167 are as screw hole.Screw 137 (referring to Figure 21) is injected screw hole, comprise that the key assembling of key unit will be fixed together with keyframe reliably.
In the key unit 157 that when all key units are assembled together, is being fixed on extreme lower position, form and lead each groove and pilot hole 141.In another key unit 158, another pilot hole 141 of formation is complementary with the pilot hole 141 of key unit 157.Be similar to the assembling of above-mentioned key, key assembling as shown in figure 33 can fall pilot hole 141 by means of the targeting part along keyframe and the method for not damaging bond switching is assembled together.
[C] the 3rd embodiment
The three-dimensional Figure 19 in front represents the key assembling by the 3rd embodiment.Reuse a through hole 208 here.When this key apparatus was fixed to the main body of musical instrument, a screw inserted by this through hole 208.
The cross sectional shape of stiffening rib 38 mainly is leg-of-mutton, and this stiffening rib 38 extends along the inwall of concave portion 37 in vertical direction.In order to be applied with suitable pressure between protuberance 33 outer walls and recess 37 inwalls when two key units (being the key piece) 22 and 23 are assembled together, the vertical angle of triangle stiffening rib 38 equals 90 °, and it is 0.1mm-0.2mm highly as an example.In order successfully to finish the insertion operation between protuberance 33 and the recess 37, wish partly to form the circular portion of radius R=0.3mm in the inlet edge of recess 37.
Figure 35 is the axonmetric chart of explanation the 3rd embodiment modification.In this embodiment, above-mentioned stiffening rib 38 forms on the outside surface of protuberance 33., three key units are provided here, i.e. black key unit 222 and two white key units 224 and 226.One eight (sound) degree part that these three key units 222,224 and 226 are assembled together and form keyboard.In black key unit 222, many black keys 221 support that by a public basicosta part 227 they can freely swing.Inside (not showing in Figure 35) part of public basicosta portion 227 is formed as above-mentioned recess, and what enter its inside is the protuberance 33 of white key unit 224.In Figure 35, two black keys 221 only are described, still, in fact should provide 5 black keys, they are corresponding symbol C#, D#, F#, G# and A# respectively.Many white keys 223 are fitted on the public basicosta part 228 of white key unit 224, and they can freely swing.In Figure 35, two white keys 223 only are described, still, in fact should provide 3 white keys, they are corresponding symbol D, F and A respectively.Similarly, many white keys 225 are fitted on the public basicosta part 229 of white key unit 226, and they can freely swing.In Figure 35, two white keys 225 only are described, in fact 4 white keys should be provided, they are corresponding symbol C, E, G and B respectively.
In the 3rd embodiment as Figure 19 or 35, two stiffening rib 38 form on the two side of recess 37 or protuberance 33 respectively.But might only provide a stiffening rib 38 to a recess 37 or a protuberance 33.Certainly, the position of this stiffening rib 38, the size or the interval of attaching troops to a unit can arbitrarily change.The shape of stiffening rib 38 is not limited to above-mentioned triangular shaped.The shape of stiffening rib can be made into semi-cylindrical, hemispheric or the like.
[D] the 4th embodiment
Next step with reference to Figure 36-38, will elaborate to four embodiment of the invention.It is the conduction eror that is installed in the circuit component on the circuit board for avoidance that this embodiment is provided.More precisely, be depressed and when being led by the key guiding mechanism, a kind of lubricant of predefined type is coated in the sliding contact part of this key guiding mechanism to stop undesirable sound generating as railway grease when key.But for same situation, this lubricant can spill into this circuit board, thereby the conduction eror of the on-off element that provides on circuit board is provided.For overcoming this shortcoming, the 4th embodiment is feature so that a kind of special entity (for example stiffening rib) to be provided, and is used to avoid lubricant to flow to circuit component.
Figure 36 is a sectional view, and the major part that offers the keyboard equipment of electronic musical instrument by the present invention the 4th embodiment is described.
This keyboard provides a key 301 and a keyframe 303.Keyframe 303 is supported an also rear edge part of retainingf key 301.Keyframe 303 is made by a kind of sheet metal with elastic stability, utilizes it to support key 301, make key 301 can buttons depress/release direction (referring to arrow A) swings up and down.
Key 301 comprises a white key 304 and a black key 305, and each is all made and all make bulk by resin material.Corresponding to the white key of predetermined quantity of one eight (sound) degree or half eight (sound) degree keyboard and black key by configured in parallel in a key unit.
Be similar to the foregoing description, the 4th embodiment provides three public basicosta parts, and they accumulate in together at the hinder marginal part of key 301.Here, the corresponding white key of per two public basicosta part 304a and 304b, and the corresponding black key of public basicosta part 305a.
One through hole is by three public basicosta part 304a, and 304b and 305 forms.302, one bosses 308 of a support point of Ying Suilian 301 append to and partly insert a lower surface of this keyframe 303, and afterwards, screw 307 inserts and be screwed into boss 308 by through hole.Like this, boss 308 be securely fixed in keyframe 308 lower surfaces below, and three public basicosta part 304a, 304b and 305 also is fixed firmly to a upper surface of keyframe 303.
Two sidewalls (referring to the right side part) of white key 304 front portions partly stretch out downwards, to form the braking member 304C that each all has pictographic character " L ".A key guiding mechanism 309 that provides is corresponding to a pair of braking member 304c.In existing example, some part of the leading edge portion of formed keyframe 303 has certain width, and this width is slightly smaller than the width of key 304; And this part be suspend with bending, make rim portion upwards reach the downside of this key; In view of the above, a kind of guiding mechanism of being made by resin material of the Outboard Sections of the suspension of keyframe 303 part covers (but for example the acoustic absorbant as the plastelast or the medium that spumes) so that form key guiding mechanism 309.On the both side surface of the key guiding mechanism 309 that slides with white key 304, coated lubricant.The inwall of braking member 304c slides along the both side surface of key guiding mechanism 309.This slide is swung when depress/will prevent during up and down key on the release direction key at key.
Be similar to Bai Jian 304, black key will be similar to above-mentioned braking member 304c braking member will be provided.In response to these braking members of black key 305, form other key guiding mechanism 309 in the leading edge portion of keyframe 303.
On a surface of the keyframe 303 of facing white key 304 lower surfaces, add a wiring board 311 is arranged.Perhaps, this circuit board 311 can be placed in the place near keyframe 303, and the switch contact is like that or the like all is installed on this wiring board 311.The corresponding respectively white key 304 of two bond switchinges 310, and black key 305 is installed on this circuit board 311.
Be similar to above-mentioned bond switching, bond switching 310 comprises fixing contact point and contact point movably.Fixed contact forms on circuit board 311, and can move in the inside part that contact is included in elasticity bump mechanism 312.For example, fixed contact point is to be made of each a pair of non-conductive component that has like comb shape or seemingly alphabetical " E " shape, and wherein, these elements are arranged on the wiring board 311 concurrently.The outside of these elements is sealed with circular carbon element seal paper.
In this elasticity bump mechanism 312, a cylindricality ridge of formation is to protrude downwards.On the lower edge face of this cylindricality ridge, form removable contact, therefore this removable contact is abreast in the face of this fixed contact.Circular removable contact is made by conductive elastomer such as conductive rubber.
Elasticity bump mechanism 312 basically by plastic resilient material for example rubber make.Annular ring 313 is formed on the top of elasticity bump mechanism 312, and actuator 314 protrudes (or protrude from the lower surface of black key 305) from the lower surfaces of white key 304 downwards.When key was depressed, actuator 314 pressed down annular ring part 313, and thus, elasticity projection 312 is made removable contact promote the fixed contact that forms on the circuit board 311 that coexists downwards and contacts by elastic deformation, like this, and conducting bond switching 310.Tone just sends afterwards.
Simultaneously, segment difference section 315 forms on a certain position of the keyframe 303 between the free edge 311a of portion of key guiding mechanism 309 and circuit board 311.Extend continuously by the configuration direction of this key this segment difference section 315.The vertical plane of this segment difference section 315 is lower than circuit board 311.
Circuit board 311 is fixed on the keyframe 303, and a wall part 315a of 315 protrudes to key guiding mechanism 309 from the segment difference section slightly to make its free edge part.
Under the segment difference section of keyframe 303, form a screw base 303a.Screw hole partly fixes its edge with body frame 316 together with screw 317 by the screw base 303a that downward direction forms.Above-mentioned boss 308 usefulness one screw 318 is fixed on another edge part of body frame 316.Like this, keyboard equipment is whole is fixed together with this body frame 316 securely.
Key brake portion 304d protrudes downwards from the white key 304 near braking member 304c, and button is depressed the lower limit detent 309a formation of white key 304 swings of direction adjustment certain part as key guiding mechanism 309 upper surfaces, when key brake portion 304d contacts with lower limit detent 309a, and white key 304 is when depressing, and the lower position of this white key 304 will be restricted.On the other hand, the upper limit detent 309b of formation is as certain part of key guiding mechanism 309 lower surfaces.When this braking member 304c contacted with this upper limit detent 309b, Bai Jian 304 returned from the key depressed position, and the upper side position of Bai Jian 304 will be restricted.
Similar therewith, limit stop limited about the upper and lower sides position of black key 305 was subjected to respectively.
At the lower surface of keyframe 303, an auxiliary circuit board 319 usefulness are inserted the screw retention of two bosses 322 respectively.
As mentioned above, because circuit board 311 positions near key guiding mechanism 309, therefore exist a kind of like this possibility, the minor amounts of lubricants 320 that promptly is coated on key guiding mechanism 309 two sides can be overflowed to circuit board 311 at leisure.For some situation, the lubricant 320 that overflows produces conduction eror on the contact of bond switching 310.
Teeter for fear of key is moved, and the slit that forms between the inwall of the two side of key guiding mechanism 309 and Bai Jian 304 (or black key 305) must be minimum.When white key 304 is assembled with keyframe 303, fix the braking member 304c of Bai Jian 304 like this, at first they are partly overlapping with key guiding mechanism 309; Then, this white key 304 is at the left direction pressurized of Figure 36.Simultaneously, brake component 304c can partly clean the lubricant on the two side that is coated in key guiding mechanism 309, so that the friction, lubrication agent can easily be moved to circuit board 311.
But according to existing example, even lubricant 320 spills into this circuit board 311 from key guiding mechanism 309, be positioned at the free edge part of key guiding mechanism 309 and circuit board 311,315 rollings that will stop lubricant 320 are divided in segment difference section between the 311a, so that the lubricant that flows does not arrive the upper surface of this circuit board 311.
Moreover the wiring board 311 of present embodiment is performed such fixing, and it is protruding in this key guiding mechanism 309 that promptly its free edge 311a of portion divides 315 the 315a of wall portion slightly from this segment difference section.This position of circuit board 311 and then will avoid arrives the flowing of lubricant 320 of this circuit board 311.
Therefore, lubricant 320 does not flow to the contact of the bond switching 310 that is installed on the circuit board 311.Like this, do not produce the conduction eror of bond switching 310.
By the way, the position of circuit board 311 can be improved like this, and promptly its free edge part 311a does not divide 315 the 315a of wall portion to protrude from the segment difference section.Even for this improved position of circuit board 311, this segment difference section divides 315 can satisfy the requirement that the lubricant of avoiding flowing 320 flows to this circuit board 311.
Figure 37 is the side view of major part of another example of explanation keyframe 303, wherein, will represent with duplicate numbers with same section shown in Figure 36.
If with the 4th embodiment shown in Figure 36 relatively, this example is characterised in that replacing the segment difference section with stiffening rib 321 divides 315.This stiffening rib 321 is provided between the free edge part 311a and key guiding mechanism 391 of circuit board 311, is used for stoping lubricating oil 320 to overflow to bond switching 310.
Even the lubricating oil 320 that is coated on the key guiding mechanism 391 overflows to circuit board 311, stiffening rib 321 can stop flowing of lubricating oil 320, and thus, lubricant 320 no longer spills into circuit board 311.Being similar to provides the segment difference section to divide the foregoing description of 315, and the stiffening rib 321 that this example provides can stop lubricant 320 to flow to the contact of bond switching 310, in other words, might avoid the conduction eror of key 310.
By the way, stiffening rib 321 can be made by enough resin materials, and irrelevant with keyframe 303, so stiffening rib 321 is to append to keyframe 303 solidly.Perhaps stiffening rib 321 can be the part of keyframe 303.Under the sort of situation, some part of the keyframe of being made by sheet metal 303 is bent upwards with stretch processing or additive method and forms stiffening rib 321.
Might further improve this example, be exactly both to provide the segment difference section to divide 315, and stiffening rib 321 is provided again.In this case, segment difference section shown in Figure 36 is divided and is being formed on the position that is between circuit board 311 and the key guiding mechanism 391 on the key 303, and stiffening rib 321 designs in the segment difference section 315 basal surface so that stop lubricant 320 to spill into circuit board 311.
According to above-mentioned improvement, even the lubricant 320 that is coated on the key guiding mechanism 391 overflows after circuit board 311, the lubricant that flows surpasses stiffening rib 321, and the lubricant that flows must divide 315 the 315a of wall portion to award prevention by the segment difference section.In brief, the lubricant of rolling can be prevented from arriving the upper surface of circuit board 311, therefore, might avoid certainly causing conduction eror on the contact that forms on the circuit board 311.
Figure 38 is the side view of another keyframe 303 of explanation and key 301 routine major parts, wherein, will represent with duplicate numbers with those same sections shown in Figure 36.
Be different from the foregoing description shown in Figure 36, the stiffening rib 321a that is used to avoid lubricating oil 320 to flow protrudes from the upper limb of being good for guiding mechanism 309, face circuit board 311, in key guiding mechanism 309, the part that lower limit detent 399 forms as key guiding mechanism 309.
Be similar to the foregoing description and improve example, this routine stiffening rib 321a can stop the lubricant from key guiding mechanism 309 to overflow to circuit board 311.Forming because stiffening rib 321a and lower limit detent 399 are the parts as key guiding mechanism 309, therefore, is that the situation of independent formation is compared with stiffening rib in the last example, might reduce the manufacturing cost of button apparatus.
As shown in figure 38, when contacting, between key part brake 304d and stiffening rib, present a gap s when key 301 (corresponding to each white key 304 and black key 305) with lower limit detent 399.Therefore, even as shown in figure 38, key 301 is depressed into the lower position, overflows under the situation of the upper surface of lower limit detent 399 at lubricant 320, and almost not a kind of like this possibility takes place, and promptly lubricant 320 exceeds stiffening rib 321a and overflows to circuit board 311.
And then this example is designed to different stiffening rib 321a with key brake portion 304d and contacts.Therefore, the stiffening rib 321a key that will be fully do not influence key 301 stroke (be the rotating distance of key 301, it is subjected to the restriction of lower limit detent 399) that falls.
[E] the 5th embodiment
Then, will provide detailed explanation by the present invention the 5th embodiment.Spy's card of present embodiment is to be added to by the present invention the key switch structure of the particular design of keyboard equipment.
It is difficult securely bond switching being appended on the circuit board generally speaking.In some cases, the pawl that centers on the bond switching outside inserts and sticks in the hole of circuit board, and bond switching is securely fixed on the circuit board.The ifs circuit plate has certain degree of hardness, and this key switch structure is effective for this bond switching is appended on the circuit board.But for the situation of flexible printed circuit board (PCB), this structure can not be worked well.On the other hand, bond switching can directly be attached to circuit board with resisting medium.But in this case,, be necessary on circuit board, to obtain certain size as bond area for obtaining enough bonding strengths.This is a shortcoming, because such bond area has limited the shape and the structure of bond switching, has side by side reduced bond switching operation degree of freedom.
For overcoming above-mentioned situation, present embodiment provides the bond switching of 3 kinds of new constructions, and by the present invention, the bond switching of this new construction can easily append to keyboard equipment.
Figure 39 is that explanation is applied in the sectional view by the mechanism structure of the keyboard equipment among the 5th kind of embodiment of the present invention, and Figure 40 is the perspective side elevation view of explanation bond switching, wherein, is formed with a pair of elasticity projection.In brief, the sectional view of Figure 39 is cut bond switching shown in Figure 40 with line X-X and is obtained.
As shown in figure 39, bond switching 410 mainly is made of a substrate 412, and it plays the underlying structure effect to bond switching, and bulging part 414 has domed shape and elasticity bulging part 411.Fixed contact 415 is attached on the substrate 412; Travelling contact 413 appends to the inwall of bulging part 414 with respect to fixed contact, and pressures partially 416 is around elasticity bulging part 44 outside formation; Perforate 418 forms by the sheet pressing mechanism, so the bulging of elasticity bulging part 44 partly 414 is inserted perforates 418 and engaged with the perforate 418 of pressures partially 417.
As shown in figure 40, quantity equals the living bulging part of many bullets 411 wire of 6 (corresponding keyboard is eight (sounds) degree sections partly) or 12 (corresponding one eight (sound) degree section) uniformly-spaced arranges, and its lower edge partly links together with pressurization part 416.These elasticity bulging parts 411 and pressures partially 416 form a unit.
Plastic with resilient material form of elasticity bulging part 411 usefulness as rubber.This elasticity bulging part 411 provides above-mentioned dome-shaped bulging part 414, cylindrical part 419, and annular ring 421 and travelling contact 413, column part 419 protrudes downwards from the center of the inwall of bulging part 414; Annular ring part 421 is in the offside of cylindrical part 419; Travelling contact 413 parts are melted and append to the lower edge surface of column part 419.The travelling contact 413 of plate-like is to make with for example such conductive elastomer of conductive rubber.When annular ring part 421 was depressed by the AA direction by external force, bulge 414 partly was out of shape, thereby travelling contact 413 is moved down with fixed contact 415 contacts that are attached on the substrate 412.
Substrate 412 is to be made by the plastic printed panel of bakelite printed panel or minimal thickness.A pair of non-conductive component, each has comb shape or letter " E " shape, and its external application by near circular element around.Form fixed contact 415 like this.Fixed contact 415 usefulness carbon dust printings etc. are formed on fixed position on the substrate 412, the travelling contact 413 of its relative resilient bulging part 411.
As shown in figure 40, location ridge 422 be formed on downwards pressures partially 416 below, between the elasticity bulging part 411 of arranging by wire uniformly-spaced.The quantity of location ridge 422 is to determine like this, is promptly formed continuously by pressures partially 416 and one group of elasticity bulging part 411 linking together can simultaneously and be fixed to substrate 412 effectively.For example, provide 3 or 4 location ridges for a key piece.Many pilot holes 423 pass substrate 412 respectively and form, as long as ridge 422 can match with them respectively.With ridge 422 patchholes 423, just may be exactly the fixing position of elasticity bulging part 411.Like this, each travelling contact 413 can be fixed in the face of one of fixed contact 415 accurately on the position.
For example it is made by mylar above-mentioned sheet pressures partially 417.Many perforates 418 all are to form by this pressing mechanism 417, and therefore, the bulging part 414 of each elasticity bulge 411 can successfully be inserted by the perforate 418 of each pressures partially 417.When inserting elasticity bulging part 411 by the perforate 418 of pressing mechanism 417, the periphery of pressing mechanism 417 is fixed on the outside of the marginal portion of pressures partially 416.
In order securely elasticity bulging part to be fixed together with substrate 412, after ridge 422 engages with the hole 423 of substrate 412 respectively, will carry out the following step.At first, has the predetermined position 412a that the big resisting medium that glues intensity is coated in the substrate 412 that is fixed on pressures partially 416 outsides; Pressing mechanism 417 covers elasticity bulging part 411, and bulging part 414 is inserted by the perforate 418 of pressing mechanism 417 respectively; Afterwards, pressing mechanism 417 bonds to substrate 412 in the following manner, and promptly the pressures partially 416 that connects with elasticity bulging part 411 is pressurizeed by pressures partially 417.As mentioned above, pressures partially 416 is firmly fixing by pressures partially 417 with elasticity bulging part 411.Like this, might between among the elasticity bulging part 411 on the substrate 412, set up the accurate in locating relation.
Therefore, when pressurization connects the pressures partially 416 of elasticity bulging part 411, just might easily this bond switching 410 be appended on the circuit board as long as pressing mechanism 417 adhered on the substrate 412.For generalized case, directly adhere to the place of circuit board in elasticity bulging part, the lower surface area of elasticity bulging part should be subjected to such restriction, promptly can obtain enough bonding strengths.Compare with this situation, the advantage of present embodiment is that the shape of the elasticity bulging part of bond switching 410 is not limited to above-mentioned factor.Its degree of freedom of design improvement about the bond switching shape is possible like this.
In addition, because there is not the interlayer that is caused by resisting medium in the structure of above-mentioned bond switching between the lower surface of substrate 412 upper surfaces and pressures partially 416.
For above-mentioned generalized case, the resisting medium layer must be formed between elasticity bulging part lower surface and the upper surface of base plate.Such resisting medium layer can or be added in the viscosity pressure between elasticity bulging part and substrate and changes its thickness slightly with the amount of resisting medium.
The thickness difference of resisting medium layer can cause the range difference between travelling contact and fixed contact.If alleged one type contact is as bond switching, this difference does not influence the work of this bond switching.But for alleged polytype contact-type contact response switch, above-mentioned little thickness difference will influence the detection of contact response.In other words, this can cause separately some deviation of contact one operation response that is arranged in the switch of the key on the keyboards for musical instruments as wire.Perhaps, this can cause other deviations of contact-operation response in musical instrument.
Owing to do not have a resisting medium layer in the present embodiment, so even for the situation of as shown in figure 41 two types of contact-type contact response switches, in key or musical instrument, do not have contact-operation response deviation.Contact-responding to switch of representing at Figure 41 provides-to first travelling contact 4131 and first fixed contact 451 and another is to second travelling contact 4132 and second fixed contact 452.Like this, the advantage of present embodiment is to have high-precision contact-responding to switch and can implements with low relatively price.
By the way, when pressing mechanism 417 was adhered to substrate 412, resisting medium can be coated on the lower surface of this pressing mechanism 417.Perhaps, double-sided belt may be added on pressurization machinery 417 or substrate 412, perhaps, other adhesive technology may be used.
In addition, resisting medium can be coated in the top of the pressures partially 416 of elasticity bulging part 411 or 411a.Similarly, when using double-sided belt, this band can adhere to the top of the pressures partially 416 of elasticity bulging 411.
Figure 42 is a sectional view of keyboard equipment, wherein, has assembled above-mentioned switchgear.
In Figure 42, bond switching 410 is installed on the body frame 429 position corresponding to white key 425 or black key 426.
Be similar to the foregoing description, three public basicosta part 425a, 425b and 216a are provided here.The public basicosta part 426a of corresponding black key accumulates in respectively on the public basicosta part 425a and 425b of corresponding white key.
Under the condition that three key pieces gather, screw 428 inserts screw hole 427, therefore entirely key combination is screwed in together with the body frame 429 by sheet metal system.
A pair of braking member 425c like letter " L " shape protrudes downwards from the two side of white key 425 respectively.Key guide 431 is fixed to the body frame 429 of response braking member 425c.When the forward position of white key 425 part upwards promoted or be downward, the inwall of braking member 425 slided along the side surface of key guide 413, and thus, the teeter of Bai Jian 425 is moved and can be avoided.
Respond each white key 425 and black key 426, bond switching 410 is fixed on a precalculated position of body frame 429.Actuator 432 protrudes downwards from the lower surface of key, and actuator is in the face of bond switching 410 like this.When key was pressed, actuator made bulging part 414 elastic deformations to the top that presses down bond switching 410.At this moment, the travelling contact of representing among Figure 39 413 contacts with fixed contact 415, and bond switching 410 is connected, and causes the tone of the corresponding key that is pressed to produce.
By the way, actuator 432 can be made the seemingly shape of letter " H " with the surface in contact 432a of bond switching 410 contacts.In this case, might stablize down state between the annular ring 421 of actuator 432 and bond switching 410.
Figure 43 represents the other example of bond switching.This routine feature has provided a plurality of ridges 435, and they form on the pressures partially 416 of elasticity bulging part 411, so that set up the positioning relation between elasticity bulging part 411 and the pressing mechanism 417.For example, two ridges 435 form on the pressures partially 416 of elasticity bulge 411.Moreover, on the certain position of each self-corresponding above-mentioned ridge 435, pass pressing mechanism 417 and form a plurality of holes 436.Other parts of example shown in Figure 43 are similar to those parts of the foregoing description shown in Figure 41, therefore, will slightly describe in detail.
According to this example, by means of with this ridge 435 patchholes 436 respectively, might be easily the fixing relation of the position between elasticity bulging part 411 and the pressing mechanism 417.Because the said fixing structure, the overall diameter of the through hole 418 of pressing mechanism 417 can amplify relatively, so that cover elasticity bulging part 411 with pressing mechanism 417 easily, the bulging part 411 of elasticity bulging part 411 is inserted by pressurization 417.Even in this case, may be exactly the fixing position of pressing mechanism 417 relative resilient bulging parts 411.In brief, may improve the performance of assembly manipulation.
By the way, the structure of bond switching 410 is not limited to person shown in Figure 40, and wherein, elasticity bulging part 411 is fixed on the position adjacent continuously.In other words, may improve bond switching like this, promptly an elasticity bulging part is fixing respectively with another elasticity bulging part adjacent to it.In this case, be necessary to provide two or more ridges 422 in an elasticity bulging part 411.
Figure 44 is the sectional view of the another kind of switchgear of explanation, and a kind of switch that it provides has elasticity bulging part and another diaphragm switch, wherein, is same as those parts shown in Figure 39 and represents with jack per line.
In this switch member, a pressing mechanism 447 usefulness resin films are done slabbing, are used to substitute above-mentioned pressing mechanism 417 shown in Figure 39.The size of this pressing mechanism 447 is greater than above-mentioned pressing mechanism 417.Condensing part 446 is leaving in pressing mechanism 447 on elasticity bulging part 411 1 precalculated positions and is forming.This is condensed part 446 and has a predetermined height.Condensing part 446 and can make like this with metal pattern.One upper contact 448 is attached on the inside surface of condensing part 446, and once contact 449 is fixed on the substrate 412 facing to upper contact 448.Like this, a kind of diaphragm switch 440 is by contact 448 with condense part 446 and constitute.
Each upper contact 448 and following contact 449 are formed by the metal pattern that predetermined material such as copper (Cu) or silver-colored (Ag) make, and carbon dust is coated onto on these metals.Under normal circumstances, contact 448 and 449 all is separated from each other fixing.When condensing part 446 when pressing down, these contacts 448 and 449 contact each other, and diaphragm switch 440 is connected thus.
In present switchgear as shown in figure 44, may form two kinds of switchtypes that comprise diaphragm switch 440 simultaneously.When using this switchgear to be used as the bond switching of electronic musical instrument, might further reduce the manufacturing cost of whole instrument.And then may be as the size of electronic musical instrument switch.
The switchgear of this type can be used for the tone color switch, audio switch or pushbutton switch (being the part selector switch), rather than be used for the bond switching of the keyboard of electronic musical instrument.The pushbutton switch that perhaps, this switchgear may be used for acoustics.
[F] the 6th embodiment
At last, the 6th embodiment of the present invention describes with reference to Figure 45 and 46.This embodiment is characterised in that the thickness that reduces keyboard equipment.Usually, should guarantee the certain vertical length between key upper surface and the keyframe upper surface, avoid the teeter of key to move during with convenient depressible keys.By means of the length that reduces keyframe.May reduce the thickness of keyboard.But, reduce keyframe thickness like this and also can play out the stability that the reduction key moves up in horizontal side.So general keyboard equipment is subjected to the hardship of big relatively thickness in its front portion.
For reducing the thickness of keyboard equipment, just invented present embodiment in its front.
Figure 45 is the side view of explanation by the physical construction of sixth embodiment of the invention keyboard equipment.In Figure 45, a white key 501 is connected to coupling part 503 by hinge fraction 503.One black key 504 also is connected to coupling part 503.Keyframe 503 is fixed with the main body (not shown) of musical instrument securely.Key 501 can swing up and down around hinge 502.Keyframe configured in parallel corresponding to each key is arranged under the key one.On each keyframe 505, the bond switching of being made by resilient material 506 is assemblied on the keyframe 505 of relative each key.Actuator 513 appends to the lower surface of key 501.This actuator 513 is fixing like this, and when key was pressed, bond switching 506 was driven by actuator 513.
At the exterior region additional key guiding mechanism 507 of keyframe 505, it is to be made by polyurethane (L) ester foamed plastic or other resilient materials.This key guiding mechanism partly is bent downwardly from lock frame 505.
Figure 46 is the three-dimensional side figure of explanation key guiding mechanism 507.This guiding mechanism mainly is made of a targeting part 510 and a braking member 511.Targeting part 510 protrudes downwards from keyframe 505, and braking member 511 protrudes to two side directions of keyframe 505.The sidewall of targeting part 510 is made guide surface, promotes and decline along guide surface key 501.This guide surface provides avoids key 501 teeters to move.The a pair of part 508 that is directed to is protruded downwards from key 501, and targeting part 510 is clipped in the middle by them.Brake portion 509, each becomes hook-shaped and protrudes from the lower edge that is directed to part 508 to key 501 longitudinal directions.When key 501 when key restores depressed position, brake portion 509 stops the rising activity of key 501 with the lower surface contact of the braking member 511 of key guiding mechanism 507.In other words, no matter part brake 509 or brake component 511 all are designed to form the lower limit detent.
Pressing when bond switching 506 and make the lower limit part of its relative low-limit detent can be used for determining to be reacted in the key position in when distortion by actuator 513.Perhaps may provide the part of a projection at the lower surface of hinge fraction 502 as the lower limit detent.In this case, just can determine this lower position during with keyframe 505 contact or with the upper surface contact of the braking member 511 of key guiding mechanism 507 when this projection.
In Figure 46, upper limit detent 509 forms the part as the lower edge part that is directed to part 508.But, may form and be directed to the upper limit detent of 508 yuan of passes of part and be placed on the another location.Perhaps, can omit the lower limit detent so that the function of this lower limit detent is solved with the contacted method of the upper surface of key guiding mechanism 507 by means of the lower surface with key 501.In this case, can add felted cloth on the upper surface of key guiding mechanism 507.
Under the button operation situation (referring to Figure 45 arrow A A), key 501 rotates around hinge fraction 502, and deflects down by the predetermined stroke shown in dot-and-dash line among Figure 45.During button operation, the part 508 that is directed to of key 501 moves down when sliding in the two sides (being guide surface) of the targeting part of the key guiding mechanism 507 that is fixed on keyframe 505 leading edge portion together.May avoid teeter to move or be related like this with the activity of deflecting down of key 501.Press present embodiment, the key guiding mechanism 507 that is fixed on keyframe 505 end edge portions forms by a kind of like this mode, and promptly the major part of key guiding mechanism 507 is towards keyframe 505 belows.In addition, the protrusion length of key guiding mechanism 507 partly is identical with the lower edge that is directed to part 508, and when key 501 was not depressed, the lower edge that is directed to part 508 partly was in below the keyframe 505.Like this, may reduce distance between key 501 upper surfaces and the keyframe 505.How can will be described below with the reason that present embodiment goes to reduce distance.
Owing to be necessary for key 501 the key descending stroke be set, if key 507 is protruding upward from keyframe 505, distance L then 3(referring to Figure 45) require at least for the key descending stroke with convex go out part and.If present embodiment is designed so that a distance L 1Be approximately equal to a distance L 2, then be understood to this distance L in theory 3Can reduce to the one stroke distance L at least 4With key upper wall thickness L 5Sum.But, in fact, have only the little thickness L of key 501 upper walls 5Can not bear key press well.For this reason, for strengthening 501 keys, provide sidewall to it.Therefore, distance L 3Equal stroke distances L 4Sidewall width L with key 501 6Sum.In other words, if the sidewall width L of key 501 6A little width can be reduced to, also key press, then distance L can be born with this width key 501 3Also reduce.Its result presses the present embodiment key board unit and can use relatively little thickness manufacturing.
By the way, the targeting part 510 of key guiding mechanism 507 can partly protrude on keyframe 505, and its downward length of protruding reduces.
At last, as described till now, the present invention can otherwise put into practice or implement, but does not depart from its spirit or substantive features.Therefore, most preferred embodiment as described herein is explanation rather than restriction, and scope of being pointed out by accessory claim of the present invention and the variation that is included in the principal right claimed range all are acceptables at this.

Claims (11)

1. key board unit that is used for electronic musical instrument comprises:
One keyframe;
One key, its fixed part is supported by institute's keyframe, the front portion of said key can freely be rotated up and down;
One actuator, it appends to the bottom of said key;
One key landing sensor has the elasticity projection, and said key landing sensor is arranged on the said keyframe, and is driven by said actuator, and when said key was pressed, this actuator was depressed said elasticity projection; And
One ways is arranged at a precalculated position of described keyframe;
Described key board unit is characterised in that further and comprises:
One assembling guide piece, match with ways simultaneously, when moving by mounting direction, said key is used for leading said key so that said key and said keyframe are fitted together, said key is led by said assembling guide piece by a kind of like this mode, promptly during assembly operation, the different said key landing sensors of said actuator contact.
2. according to a kind of key board unit that is used for electronic musical instrument of claim 1, it is characterized in that described assembling guide piece comprises:
One avoids contact member, be arranged on said key below, the said contact member of avoiding slides along said ways when carrying out assembly operation, make said key and said keyframe be assembled together, said actuator Be Controlled must during the said assembly operation by making between said actuator and the said key landing sensor maintenance certain distance and different said key decline sensor contacts until said assembly operation will be finished before.
3. according to a kind of key board unit that is used for electronic musical instrument of claim 1, it is characterized in that described assembling guide piece comprises:
An assembling ways, it appends to the following of said key and protrudes downwards from said key is following, saidly just in time finish by this sample loading mode up to the assembling ways that before assembly operation, is used for said key and said keyframe fit together, promptly adjust laterally moving of said actuator relative to said key landing sensor, thereby make said key when said key is assembled into said keyframe by its longitudinally guiding, said assembling ways provides a tapering part, when said key is led by said assembling ways, between said actuator and said key landing sensor, will set up the preposition relation.
4. according to a kind of key board unit that is used for electronic musical instrument of claim 1, it is characterized in that described assembling guide piece comprises:
One assembling ways, it is arranged on the said keyframe, said assembling ways leads to said key when carrying out assembly operation between said key and keyframe in such a way, be that the fixed part of said key falls mode by approximate nature and is directed falling, said then actuator is with the upper surface contact of said key landing sensor.
5. according to a kind of key board unit that is used for electronic musical instrument of claim 1, it is characterized in that described assembling guide piece comprises:
One is directed to part, and it is formed on the fixed part of said key; And
One assembling ways, it is arranged on the said keyframe, said assembling ways is directed to part with said key said and interacts and go in such a way said key is led when carrying out assembly operation between said key and keyframe with box lunch, be that the fixed part of said key falls mode by approximate nature and is directed falling, said then actuator is with the upper surface contact of said key landing sensor.
6. a kind of key board unit that is used for electronic musical instrument as claimed in claim 5, it is characterized in that, said assembling ways is a ridge, it is protruding upward from said keyframe, and it highly is to determine like this, promptly just in time said ridge with said key said be directed to the part engagement before or after the time, said actuator is on the said key landing sensor and leaves said key landing sensor.
7. a kind of key board unit that is used for electronic musical instrument as claimed in claim 5, it is characterized in that, said assembling ways has from said keyframe shape protruding upward, said assembling ways also works to support the top body, relies on a part that contacts the main body that forms said electronic musical instrument with the lower surface of said top body.
8. according to a kind of key board unit that is used for electronic musical instrument of claim 4, it is characterized in that, described fixed part has one to be directed to part and a hole, just before assembly operation is finished, the said part that is directed to is guided by described ways, then, said fixed part falls into this hole.
9. according to a kind of key board unit that is used for electronic musical instrument of claim 5, it is characterized in that described fixed part is being formed with a hole with the described adjoiner that is directed to part, when it was guided by described ways, described fixed part then fell into this hole.
10. according to a kind of key board unit that is used for electronic musical instrument of claim 2, it is characterized in that the described contact member of avoiding is made of a prolongation of said actuator.
11. a kind of key board unit that is used for electronic musical instrument according to claim 2 is characterized in that, described contact member and the said actuator avoided forms discretely.
CN 93117785 1992-08-10 1993-08-10 Keyboard assembly for electronic musical instrument Expired - Lifetime CN1032169C (en)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP21307692 1992-08-10
JP213076/92 1992-08-10
JP056094/92 1992-08-10
JP297059/92 1992-11-06
JP344942/92 1992-12-24
JP088890/92 1992-12-25
JP348121/92 1992-12-28
JP104868/93 1993-05-06
JP5104868A JP2848186B2 (en) 1993-05-06 1993-05-06 Keyboard device

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CN95102652A Division CN1034449C (en) 1992-08-10 1995-03-08 Keyboard assembly for electronic musical instrument
CN95102765A Division CN1035697C (en) 1992-08-10 1995-03-08 Keyboard assembly for electronic musical instrument

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CN1086035A CN1086035A (en) 1994-04-27
CN1032169C true CN1032169C (en) 1996-06-26

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CN95102652A Expired - Lifetime CN1034449C (en) 1992-08-10 1995-03-08 Keyboard assembly for electronic musical instrument

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JP4270177B2 (en) * 2005-07-21 2009-05-27 ヤマハ株式会社 Keyboard device
JP2008003210A (en) * 2006-06-21 2008-01-10 Yamaha Corp Keyboard device of electronic keyboard musical instrument
JP2008003209A (en) * 2006-06-21 2008-01-10 Yamaha Corp Keyboard device of electronic keyboard musical instrument
JP5098712B2 (en) * 2007-03-23 2012-12-12 ヤマハ株式会社 Locking device
JP2009014818A (en) * 2007-07-02 2009-01-22 Yamaha Corp Keyboard apparatus
JP5369946B2 (en) * 2009-07-09 2013-12-18 ヤマハ株式会社 Electronic musical instrument keyboard device
JP6091390B2 (en) * 2013-09-26 2017-03-08 株式会社河合楽器製作所 Keyboard device for keyboard instrument
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CN1086035A (en) 1994-04-27
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