JP2002189471A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To guide a key so as not to roll in an ordinary key touch operation range and to well roll the pushed-in key. SOLUTION: The upper and lower parts at both ends of a key guide 5 for guiding the key 2 in a vertical direction are provided with guide projections 13 and 14 and the inside surfaces of stopper pieces 10 of the key 2 with which these projections 13 and 14 come into contact are provided with escape recesses 15 to which the guide projection 14 on the lower side insertably corresponds when the key 2 is further pushed in often the ordinary key touch operation. Accordingly, the key 2 can be guided in the vertical direction by the guide projections 13 and 14 in the ordinary key touch operation range. When the key 2 is further pushed in after the ordinary key touch, the guide projection 14 on the lower side insertably corresponds to the escape recess 15 and therefore the good rolling of the key 2 is made possible.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a keyboard device for an electronic keyboard instrument such as an electronic piano.

[0002]

2. Description of the Related Art Conventionally, in an electronic keyboard instrument such as an electronic piano, after a normal key is pressed, a key is pressed in accordance with a force for further pressing the key.
Some devices have an aftertouch function that changes the pitch, timbre, volume, etc., adds various effects to the sound being generated, and enhances the expressiveness of the sound. An electronic keyboard instrument of this type includes a keyboard chassis, a plurality of keys arranged on the keyboard chassis so as to be vertically rotatable, and a switch member provided on the keyboard chassis corresponding to each of the plurality of keys. And a pressure sensor for aftertouch, which is provided on the keyboard chassis and detects the pressing force of each key.

In such an electronic keyboard instrument, when a key is pressed, a switch pressing portion provided on the key presses a switch member to perform a switching operation, thereby generating a sound corresponding to the pressed key. When the key is further pressed in this state, the pressure sensor is pressed by the key to detect the pressing force of the key, and the pitch, timbre, volume, etc. are changed to the sound being generated based on the detection signal. Various effects are given. For this reason, in this electronic keyboard instrument, as shown in FIG. 17, a key guide 52 for preventing the key 51 from swinging laterally when the key is pressed is provided on a keyboard chassis 53 corresponding to each key 51. That is, the key guide 52 is provided with the hollow key 51.
The key 51 is configured to smoothly guide the key 51 vertically with a small gap S such that both ends of the key 51 can contact the inner surface of the key 2.

[0004]

By the way, in such an electronic keyboard instrument, when the key 51 is further depressed after the normal key depression to press the after-touch pressure-sensitive sensor,
The after-touch operation of rolling the pressed key 51 to press the pressure-sensitive sensor, that is, moving the key 51 in the left-right direction (FIG. 17)
There is an after-touch method of pressing the pressure-sensitive sensor by tilting the pressure-sensitive sensor in the direction of arrow X. However, when such after-touch is performed, if the gap S between the key 51 and the key guide 52 is small, the rolling angle of the key 51 (that is, the key 51
The inclination angle of the key 51 becomes small, and the key 51 cannot be sufficiently rolled. In order to prevent such a problem, a gap S between the key 51 and the key guide 52 is set.
When the key is widened, as shown in FIG. 18, the key 51 easily swings laterally in a normal key pressing operation range, and there is a problem that the adjacent keys 51 come into contact with each other.

SUMMARY OF THE INVENTION It is an object of the present invention to guide a key so that it does not shake in a normal key pressing operation range, and to be able to satisfactorily roll a pressed key.

[0006]

According to the present invention, there is provided a keyboard chassis, a plurality of keys arranged in parallel on the keyboard chassis and rotating in the vertical direction, and a plurality of keys provided on the keyboard chassis. A plurality of key guides for guiding the keys in the vertical direction, and an after-sensor for detecting the force of the key being pressed after the key is normally pressed, and a sound effect based on a detection signal detected by the after-sensor. Is provided with a rolling function of making the key rollable when the key is further pressed after the key is normally pressed. According to the present invention, the key is guided by the key guide in the normal key pressing operation range, so that the key can be smoothly moved up and down without laterally swinging, and further after the normal key pressing. When the key is depressed, the key can be rolled by the rolling function, so that the key can be rolled well.

In this case, the rolling function is provided on one of the key guide and the key and guides the key relatively in the up-down direction. An escape portion is provided on the other of the guide and the key, and the guide projection portion can be inserted so as to be inserted when the key is further depressed and the after sensor is pressed after the normal key depression of the key. Thus, the key can be relatively vertically guided by the guide protrusions in the normal key pressing operation range, and when the key is further pressed after the normal key press, the guide protrusions are released. , So that the key can be satisfactorily rolled.

According to a third aspect of the present invention, the rolling function is provided on an upper side of one of the key guide and the key and guides the key relatively vertically. An elastic guide projection, which is provided on the lower side of the one side and guides the key relatively in the vertical direction, is capable of elastic deformation, so that the guide projection and the elastic guide projection in a normal key pressing operation range. The key can be guided relatively in the up and down direction, and when the key is further depressed after the normal key is pressed, the lower elastic guide projection can be elastically deformed. With the fulcrum as a fulcrum, the key can be favorably rolled.

According to another aspect of the present invention, the rolling function is provided on an upper side of the key guide and guides the upper side of the key relatively in the vertical direction; A lower guide portion provided at a lower side of the key to relatively guide the lower side of the key in the vertical direction; and a lower guide portion provided between the upper guide portion and the lower guide portion to elastically deform in the key arrangement direction. The key can be vertically guided by the upper guide portion and the lower guide portion in the normal key pressing operation range, and the key is further pressed after the normal key pressing. In some cases, the elastic deformation portion provided between the upper guide portion and the lower guide portion can be elastically deformed in the key arrangement direction, so that the key can be favorably rolled with the upper guide portion as a fulcrum.

Further, as described in claim 5, the rolling function is such that the key guide is connected to the keyboard chassis and comprises an elastically deforming portion which is elastically deformed in the rolling direction of the key, so that the normal pressing is performed. In the key operation range, the key can be guided by the key guide, and when the key is further pressed after the normal key is pressed, the elastic deformation portion can be elastically deformed in the rolling direction of the key,
The key can be rolled well. in this case,
According to a sixth aspect of the present invention, the after sensor is a strain sensor provided in the elastically deformable portion, so that when the key is rolled, the elastically deformable state of the elastically deformable portion can be accurately detected. This makes it possible to accurately detect the rolling state of the key.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of a keyboard device according to the present invention will be described below with reference to FIGS. As shown in FIGS. 1 to 4, this keyboard device includes a keyboard chassis 1 made of a synthetic resin incorporated in a musical instrument case, and a keyboard made of a synthetic resin mounted on the keyboard chassis 1 so as to be vertically rotatable. A plurality of keys 2, a switch member 3 that switches on and outputs an ON signal in accordance with the key pressing operation of the plurality of keys 2, and a case where the key 2 is further depressed after normal key pressing of each key 2 A pressure sensor 4 for aftertouch for detecting the pushing force, and a key guide 5 for preventing the keys 2 from swaying when the keys are pressed.

As shown in FIGS. 1 and 2, the keys 2 include a white key 2a and a black key 2b, which are arranged on the keyboard chassis 1 in parallel. In this case, the black key 2b
Are formed shorter than the length of the white key 2a and higher than the height of the white key 2a, and have substantially the same structure as the white key 2a except for this. Therefore, in the following description, the white key 2
Let a be a key 2. As shown in FIG. 3, the plurality of keys 2 each have a thin portion 6 formed at a rear end (right end in FIG. 3), and the rear end of each of the thin portions 6 extends along the key 2 arrangement direction. They are integrally connected to each other while being arranged in parallel with the common connecting portion 7. The keys 2 are mounted on a mounting portion 8 having a connecting portion 7 provided on the rear portion of the keyboard chassis 1 along the direction in which the keys 2 are arranged. It is configured so that it rotates vertically and two switch pressing portions 8 formed substantially in the middle of each key 2 press the switch member 3.

In this case, each key 2 is urged upward by the elastic restoring force of the thin portion 6 and the elastic restoring force of the swelling rubber 9 of the switch member 3, which will be described later. A pair of L-shaped stopper pieces 10 suspended from the front side (the right side in the figure) of each key 2 is a keyboard chassis 1.
By contacting an upper limit stopper 11 made of felt or the like provided on the lower surface of the front end portion of the front end portion, the position is regulated to a predetermined initial position (upper limit position). Each key 2 is
When the key is pressed, it turns counterclockwise in FIG. 3 around the thin portion 6, and as shown in FIG. 4, after the two switch pressing portions 8 press the switch member 3, the vicinity of the pair of stopper pieces 10 , The lower end of the key 2 is contacted with a later-described pressure sensor 4 for aftertouch provided on the upper portion on the front side of the keyboard chassis 1, thereby restricting the position to a predetermined lower limit position.

As shown in FIG. 3, the switch member 3 is composed of a swelling rubber 9 and a switch board 12, and is disposed on the lower surface of the keyboard chassis 1 at a substantially intermediate portion. The swelling rubber 9 has a dome-like swelling portion formed in two rows on a band-like rubber sheet continuous in the arrangement direction of the keys 2, and these two sets of swelling portions correspond to two switch pressing portions 8 of each key 2. Are inserted into the respective through holes of the keyboard chassis 1 from below and protrude upward. The switch board 12 is attached to the lower surface of the keyboard chassis 1 via the swelling rubber 9. Thereby, the switch member 3 is configured such that when the two sets of swelling portions of the swelling rubber are sequentially pressed by the two switch pressing portions 8 with a time lag in response to the key pressing operation,
As shown in FIG. 4, each bulging portion is sequentially elastically deformed, and a movable contact provided therein sequentially contacts a fixed contact provided on the switch substrate 12, thereby outputting a switch signal. Have been.

Further, a pressure-sensitive sensor 4 for aftertouch
Are provided on the upper surface of the keyboard chassis 1 along the direction in which the keys 2 are arranged. After the keys 2 are pressed, the swelling portions of the swelling rubber 9 are pressed by the switch pressing portions 8, respectively. When the key 2 is pressed, the pressing force of the key 2 is detected. That is, the pressure sensor 4
Although not shown, a flexible sensor sheet is provided via a spacer on a substrate on which electrodes are provided on the upper surface, and when the sensor sheet is pressed at the lower end of the key 2, the sensor is provided in accordance with the pressing force. The sheet bends, and the pressure-sensitive layer provided on the lower surface of the sensor sheet comes into contact with the electrode portion, and the electric resistance changes according to the contact area and the magnitude of the contact pressure. It is configured to output a signal. For example, if the pressing force of the key 2 is weak, the contact area and the contact pressure of the pressure-sensitive layer with respect to the electrode portion are small, and the electric resistance value is high. Large contact area and contact pressure
Electric resistance decreases.

On the other hand, the key guides 5 are formed integrally with the keyboard chassis 1 so as to correspond to the stopper pieces 10 of the respective keys 2. These key guides 5 are inserted between the pair of stopper pieces 10 in the hollow key 2 to guide the key 2 in the up-down direction, and the key 2 is further pressed after the key 2 is normally pressed. Sometimes, FIGS. 7A and 7B
As shown in (1), a rolling function is provided to make the key 2 rollable, that is, the key 2 can be tilted left and right.

This rolling function is shown in FIGS.
As shown in (c), guide projections 13 and 14 provided on the upper and lower portions of the left and right end surfaces of the key guide 5 respectively.
As shown in FIGS. 5 and 6A, a relief recess 15 is provided at a substantially intermediate portion of the inner surface of the stopper piece 10 of the key 2. Guide projections 13, 14
Are formed so as to protrude in a hemispherical shape, and come into point contact with the respective inner surfaces of the pair of stopper pieces 10 of the key 2 so as to relatively slide vertically in this state. The relief recess 15 is formed in a hemispherical recess, and when the key 2 is further depressed and presses the after-touch pressure-sensitive sensor 4 after the normal depression of the key 2, as shown in FIG. The guide projections 14 on the lower side are adapted to be insertable.

In such a keyboard device, when the key is not pressed, as shown in FIG. 3, the elastic restoring force of the two bulging portions of the switch member 3 and the elastic restoring force of the thin portion 6 of the key 2 are provided. As a result, the key 2 is pushed up, and the pair of stopper pieces 10 of the key 2 abut on the upper limit stopper 11 of the keyboard chassis 1, whereby the position of the key 2 is restricted to the initial position (upper limit position). At this time, as shown in FIG. 6A, of the upper and lower guide projections 13 and 14 of the key guide 5, the upper guide projection 13 is located substantially in the middle of the stopper piece 10 of the key 2. The lower portion of the guide projection 14 contacts the inner surface of the portion located on the lower side of the stopper piece 10 without corresponding to the relief recess 15. As a result, the key 2 is held so as not to shake.

In this state, the key 2 is pressed against the elastic restoring force of the two sets of swelling portions of the swelling rubber 9 and the elastic restoring force of the thin portion 6.
When the key is pressed, as shown in FIG. 4, the key 2 pivots downward with the thin portion 6 at the rear end of the key 2 as a hinge, and each switch pressing portion 8 of the key 2 causes each expansion of the switch member 3 to expand. The protruding portion is sequentially elastically deformed to bring the movable contact into contact with the fixed contact in sequence, whereby the switch member 3 outputs a switch signal and emits a sound corresponding to the key 2 depressed. At this time, in a state where the respective inner surfaces of the pair of stopper pieces 10 of the key 2 are in contact with the guide projections 13 and 14 provided on the key guide 5, FIG.
As shown in (b), since the key 2 is guided, the key 2 moves downward without swinging.

Thereafter, when the key 2 is further depressed, the key 2
Presses the pressure sensor 4 for after touch. At this time, as shown in FIG. 6C, the guide projection 13 on the upper side of the key guide 5 is
The key 2 is guided by contacting the respective inner surfaces of the key guide 5. The guide projections 14 on the lower side of the key guide 5 correspond to the escape recesses 15 provided on the respective inner surfaces of the pair of stopper pieces 10. Is ready for rolling. For this reason,
7 (a) and 7 (b) with the key 2 depressed
When the key 2 is tilted left and right as shown in FIG. 5, one of the lower guide projections 14 with the upper guide projection 13 serving as a fulcrum allows the corresponding stopper piece 10 to escape. The key 2 can be rolled because it is inserted into the recess 15 and the escape recess 15 of the other stopper piece 10 is separated from the other guide projection 14.

As described above, in this keyboard instrument, the key 2 can be smoothly guided up and down by the guide projections 13 and 14 of the key guide 5 in the normal key pressing operation range without the key 2 swinging sideways. it can. Further, when the key 2 is further depressed after the normal key depression, the lower guide projection 1
4 corresponds to the relief recess 15 of the stopper piece 10,
The key 2 can be made to be in a rollable state, whereby the key 2 can be rolled well. As a result, the pressure-sensitive sensor 4 outputs an electric signal corresponding to the pressing force accompanying the rolling of the key 2 (the pushing force accompanying the rolling of the key 2). Various effects for changing the height, tone, volume, and the like can be given, and the expressiveness of sound can be enhanced.

In the first embodiment, the key guide 5
The guide projections 13 and 14 are provided at both ends of the key 2 and the escape recesses 15 are provided on the respective inner surfaces of the pair of stopper pieces 10 of the key 2. However, the invention is not limited to this.
A structure in which guide protrusions 13 and 14 are provided on each inner surface of the key guide 5 and escape recesses 15 are provided at both ends of the key guide 5 is also possible. With such a structure, the same operation and effect as in the first embodiment can be obtained. Further, in the first embodiment, as the escape portion,
Each of the inner surfaces of the pair of stopper pieces 10 of the key 2 is provided with a hemispherical relief recess 15. However, the present invention is not limited to this. For example, as shown in FIG. When the key 2 is further pressed after the key is pressed and the pressure sensor 4 for after touch is pressed, the notch 16 corresponding to the insertion of the guide projection 14 on the lower side may be provided as a relief portion. Even with such a structure, the first
The same operation and effect as the embodiment can be obtained.

[Second Embodiment] Next, FIG. 9 and FIG.
A second embodiment of the keyboard device of the present invention will be described with reference to FIG. The same components as those of the first embodiment shown in FIGS. 1 to 7 are denoted by the same reference numerals and described. This keyboard device has a rolling mechanism for the key 2 different from that of the first embodiment, and has the same structure as that of the first embodiment except for this. That is, in this rolling mechanism, as shown in FIGS. 9A to 9C, the guide projections 20 are provided on the upper portions of both end surfaces of the key guide 5, respectively.
The elastic guide protrusions 21 which can be elastically deformed are provided at the lower portions of both end surfaces of the elastic member.

In this case, each guide projection 20 on the upper side
Is a pair of stopper pieces 10 of the key 2 as in the first embodiment.
It is configured to slide relatively in the up and down direction without being deformed while being in contact with each inner surface. Each of the lower elastic guide protrusions 21 can be elastically deformed by forming vertically elongated hollow portions on both sides of the key guide 5 as shown in FIGS. 9 (a) to 9 (c). Elastic portions 22 are formed, and projections 23 are respectively provided at intermediate portions on the outer side of the elastic portions 22. The projections 23 are formed by a pair of stopper pieces 1 of the key 2 by the elastic force of the elastic portions 22.
When the key 2 slides up and down relatively in this state, as shown in FIGS. 10 (a) and 10 (b), the key 2 is tilted left and right. The elastic portion 22 is pressed by any one of the inner surfaces of the pair of stopper pieces 10.
Are configured to elastically deform.

In such a keyboard device, when the key is not depressed, the key 2 is pushed up and the pair of stopper pieces 10 of the key 2 contact the upper limit stopper 11 of the keyboard chassis 1 as in the first embodiment. Thus, the position of the key 2 is restricted to the initial position (upper limit position). At this time, FIG.
As shown in (a), each guide projection 20 on the upper side of the key guide 5 comes into contact with each inner surface of a portion located at a substantially intermediate portion of the pair of stopper pieces 10 of the key 2 and each elastic guide on the lower side. The protrusion 21 elastically contacts each inner surface of a portion located on the lower side of the pair of stopper pieces 10, thereby holding the key 2 so that the key 2 does not swing.

When the key 2 is depressed in this state, the key 2 is pivoted downward using the thin portion 6 at the rear end of the key 2 as a hinge, as in the first embodiment, and each switch of the key 2 is pressed. The portion 8 presses each bulging portion of the switch member 3, outputs a switch signal from the pressed switch member 3, and emits a sound corresponding to the key 2 pressed based on the switch signal. At this time, as shown in FIG. 9B, the respective guide projections 20 and the respective elastic guide projections 21 provided at both ends of the key guide 5 contact the respective inner surfaces of the pair of stopper pieces 10 of the key 2. In this state, the key 2 moves downward while being guided without lateral swing.

Thereafter, when the key 2 is further depressed, the key 2
Presses the pressure sensor 4 for after touch. At this time, as shown in FIG. 9C, the respective guide projections 20 on the upper side of the key guide 5 contact the respective inner surfaces of the pair of stopper pieces 10 of the key 2 to guide the key 2 without being deformed. However, since each of the elastic guide projections 21 on the lower side of the key guide 5 is in elastic contact with each of the inner surfaces of the pair of stopper pieces 10 by the elastic force of each of the elastic parts 22, each elastic part 22 is elastic. The key 2 is in a rollable state by being deformed. Therefore, with the key 2 depressed, as shown in FIGS. 10A and 10B,
When the key 2 is tilted left and right, one of the elastic guide projections 21 on the lower side is pushed by the corresponding stopper piece 10 and elastically deforms, with the guide projections 20 on the upper side serving as fulcrums, and the other stopper piece is deformed. Since the key 10 is separated from the other elastic guide projection 21, the key 2 can be rolled.

As described above, according to this keyboard device, the respective guide projections 20 are provided on the upper side at both ends of the key guide 5, and the respective elastic guide projections which can be elastically deformed on the lower side at both ends of the key guide 5. Since the projection 21 is provided, the guide projections 20 on the upper and lower portions of the key guide 5 in a normal key pressing operation range.
Further, the key 2 can be smoothly guided in the up and down direction without laterally swinging by the elastic guide projections 21. When the key 2 is further pushed in after normal key pressing, the key 2 is located at the lower side. Since each elastic guide projection 21 is elastically deformable, the key 2 can be rolled by tilting the key 2 left and right to elastically deform one of the elastic guide projections 21. Thereby, the pressure-sensitive sensor 4
Outputs an electric signal corresponding to the pressing force accompanying the rolling of the key 2 (the pushing force associated with the rolling of the key 2). Based on the electric signal, the pitch, timbre, volume, etc. Various changing effects can be provided to enhance the expressiveness of sound.

In the second embodiment, the key guide 5
Each of the guide protrusions 20 is provided on the upper side of both ends of the key 2 and each of the elastic guide protrusions 21 is provided on the lower side thereof. However, the present invention is not limited to this. A structure in which each guide protrusion 20 is provided in a portion and each elastic guide protrusion 21 is provided on a lower side of each inner surface of the pair of stopper pieces 10 may be used. Even with such a structure, the second
The same operation and effect as the embodiment can be obtained.

[Third Embodiment] Next, a third embodiment of the keyboard device of the present invention will be described with reference to FIG. In this case, the same components as those of the second embodiment shown in FIG. 9 and FIG. This keyboard device has a key guide 2 for guiding the key 2 in the vertical direction.
The rolling mechanism of the key 5 and the key 2 is different from that of the second embodiment, and other than this, the structure is almost the same as that of the second embodiment. That is, the key guide 25 is formed integrally with the keyboard chassis 1 via the connecting portion 26, and a rolling mechanism is provided at the lower end thereof. This rolling mechanism has a structure in which a pair of elastic guide portions 27 that can be elastically displaced are integrally formed on both sides of a lower end portion of the key guide 25. The pair of elastic guide portions 27 hang down from the lower end surface of the key guide 25 and are elastically deformable in the left-right direction of the key 2. Of the pair of stopper pieces 10 and slides in elastic contact with each other, and each elastic deformation portion 28 is elastically deformed to displace the guide portion 29 left and right. .

In such a keyboard device, since a pair of elastic guide portions 27 are formed at the lower end of the key guide 25 for guiding the key 2, as in the second embodiment, the key guide 25 is in a normal key pressing operation range. The key 2 can be smoothly guided in the vertical direction by the pair of elastic guide portions 27 without the key 2 swinging sideways. After the normal key press, the key 2
When the key 2 is pressed, the elastic deformation portions 28 of the pair of elastic guide portions 27 can be elastically deformed. Therefore, the key 2 is rolled by tilting the key 2 left and right to elastically deform the elastic deformation portions 28. be able to. Also in this case, the pressure sensor 4 outputs an electric signal corresponding to the pressing force accompanying the rolling of the key 2, so that the pitch, timbre, volume, and the like are changed to the sound being generated based on the electric signal. Various effects can be provided, and the expressiveness of sound can be enhanced.

In the third embodiment, the key guide 2
A pair of elastic guide portions 27 are provided on both sides of the lower end portion of the key 5, but the present invention is not limited to this. For example, as shown in FIG. A lower guide portion 31 for vertically guiding the lower side inside the key 2 and an elastically deforming portion 32 formed between the upper guide portion 30 and the lower guide portion and elastically moving in the left-right direction of the key 2. That is, a structure in which the upper guide portion 30 is fixed to the keyboard chassis 1 via the connecting portion 26 may be employed. Even with such a structure, when the key 2 is depressed,
Since the elastically deformable portion 32 can be elastically deformed, the key 2 can be tilted left and right to elastically deform the elastically deformable portion 32,
As in the second embodiment, the key 2 can be rolled.

[Fourth Embodiment] Next, a keyboard device according to a fourth embodiment of the present invention will be described with reference to FIG. In this case, the same components as those of the first embodiment shown in FIGS. This keyboard device has a rolling mechanism for the key 2 different from that of the first embodiment, and has the same structure as that of the first embodiment except for this. That is, as shown in FIG. 13, the rolling mechanism has a structure in which the key guide 5 is integrally connected to the keyboard chassis 1 via an elastically deformable thin portion 35. The thin portion 35 has a thin flat plate shape, is formed substantially horizontally on the keyboard chassis 1, and is configured to elastically deform in a twisting direction in this state. in this case,
The key guide 5 is inserted into the inner surface of the key 2 with a small gap, guides the key 2 in the vertical direction, and when the key 2 is pushed in and tilts left and right, the thin portion 35 is twisted accordingly. Thus, the key guide 5 is configured to be inclined in the left-right direction.

In such a keyboard device, the thin portion 35 which is elastically deformed in the torsion direction is formed in the keyboard chassis 1 in a substantially horizontal state, and the key guide 5 is integrally connected to the keyboard chassis 1 via the thin portion 35. Since the key 2 is formed, the key 2 can be smoothly guided in the vertical direction by the key guide 5 in the normal key pressing operation range. After the normal key press, the key 2
When the key 2 is tilted left and right in a state where the key is pressed, the thin portion 35 is elastically deformed in the twisting direction, and the key guide 5 is tilted left and right with this. Therefore, the key 2 can be rolled well. . This also allows the pressure sensor 4 to
It outputs an electric signal according to the pressing force associated with the rolling of the sound, and based on this electric signal, gives various effects to change the pitch, timbre, volume, etc. to the sound being generated, and expresses the sound Can be increased.

[Fifth Embodiment] Next, a keyboard device according to a fifth embodiment of the present invention will be described with reference to FIG. In this case, the same components as those of the fourth embodiment shown in FIG. This keyboard device is different from the fourth embodiment in the thin portion 36 of the rolling mechanism of the key 2. That is, the thin portion 36 has a thin flat plate shape, is formed substantially perpendicular to the keyboard chassis 1, and is configured to be elastically deformed in a twisting direction in this state. Further, as shown in FIG. 14, a strain sensor 37 for after touch is attached to the thin portion. The strain sensor 37 is configured to output an electric signal corresponding to the torsional deformation of the thin portion 36, that is, the torsional direction and the amount of torsional deformation. As in the fourth embodiment, the key guide 5 is inserted into the inner surface of the key 2 with a small gap, guides the key 2 in the up and down direction, and when the key 2 is pushed in and tilts left and right, Accordingly, the thin portion 36 is twisted, and the key guide 5 is inclined in the left-right direction.

In such a keyboard device, the thin portion 36 elastically deformed in the twisting direction is formed substantially perpendicular to the keyboard chassis 1, and the key guide 5 is integrally connected to the keyboard chassis 1 via the thin portion 36. Therefore, similarly to the fourth embodiment, the key 2 can be smoothly guided in the vertical direction by the key guide 5 in the normal key pressing operation range. Further, when the key 2 is tilted left and right while the key 2 is further depressed after the normal key depression, the thin portion 36 is elastically deformed in the twisting direction, and the key guide 5 is also tilted accordingly. Rolling can be performed well. At this time, since the strain sensor 37 is provided in the thin portion 36, the strain sensor 37
Outputs an electrical signal in accordance with the torsional deformation of the thin portion 36, so that the rolling state of the key 2 can be detected more accurately than when the pressure-sensitive sensor 4 is used.

In the fourth and fifth embodiments, the thin plate-shaped thin portion 35 or 36 having a small thickness is attached to the keyboard chassis 1.
And the key guide 5 is integrally connected to the keyboard chassis 1 via the thin portion 35 or 36, but is not limited to this, and may be configured as shown in FIG. 15 or FIG. That is, in the first modified example shown in FIG. 15, the thin-walled thin plate-shaped thin portion 40 is formed so as to be convex upward and formed on the keyboard chassis 1.
A key guide 5 is formed at the end of the thin portion 4 in this state.
0 is elastically deformed in a direction in which the key guide 5 is inclined left and right. In the second modification shown in FIG. 16, a thin strip-shaped thin portion 41 is formed in the keyboard chassis 1 so as to be curved so as to project downward. The key guide 5 is formed at the tip, and in this state, the thin portion 41 is configured to be elastically deformed in a direction in which the key guide 5 is inclined left and right. In each of the first and second modifications, the same operation and effect as those of the fourth and fifth embodiments are obtained.

In the first to fifth embodiments and the modifications thereof, a thin portion 6 is formed at the rear end of each key 2, and this thin portion 6 is connected to a common connecting portion 7 as a hinge portion. The keyboard device having an integral key structure in which a plurality of keys are formed integrally and assembled to the keyboard chassis 1 by forming the key chassis has been described. However, the present invention is not limited thereto. For example, a coil spring or the like may be provided between each key and the keyboard chassis. The present invention can also be applied to a keyboard device in which spring members are provided, and these keys bias each key to an initial position. The present invention is not limited to this, and the present invention can be applied to a keyboard device in which a hammer arm is provided in correspondence with each key and an action load is applied by the hammer arm when a key is pressed.

[0039]

As described above, according to the present invention, the key is guided by the key guide in the normal key pressing operation range, so that the key can be smoothly moved up and down without sideways. When the key is further depressed after a normal key depression, the key can be rolled by the rolling function, so that the key can be satisfactorily rolled.

In this case, the rolling function is provided on one of the key guide and the key, and is provided on the other of the key guide and the key. When the key is further depressed after the normal key is pressed and the after sensor is pressed, the guide projection is formed so as to be capable of being inserted so that the key can be inserted by the guide projection in the normal key pressing operation range. The guide can be relatively guided in the vertical direction, and when the key is further pressed after the normal key is pressed, the guide projection corresponds to the insertable portion so that the key can be rolled well. it can.

The rolling function is provided on the upper side of one of the key guide and the key and guides the key relatively vertically, and the rolling function is provided on the lower side of one of the keys. In the normal key pressing operation range, the key is relatively vertically guided by the guide projection and the elastic guide projection by comprising the elastically deformable elastic guide projection which guides the key vertically. When the key is further depressed after the normal key is pressed, the lower side elastic guide projection can be elastically deformed, so that the key can be satisfactorily rolled with the upper side guide projection as a fulcrum. Can be.

The rolling function is provided on the upper side of the key guide and guides the upper side of the key relatively in the vertical direction. The lowering part of the key guide is provided on the lower side of the key guide. A normal key press is made up of a lower guide portion that relatively guides the sides in the vertical direction, and an elastic deformation portion that is provided between the upper guide portion and the lower guide portion and elastically deforms in the key arrangement direction. In the operation range, the key can be vertically guided by the upper guide portion and the lower guide portion, and when the key is further pressed after a normal key press, the key is provided between the upper guide portion and the lower guide portion. Since the provided elastically deformable portion is elastically deformable in the key arrangement direction, the key can be favorably rolled with the upper guide portion as a fulcrum.

Further, the rolling function is such that the key guide is connected to the keyboard chassis and comprises an elastic deformation portion which is elastically deformed in the key rolling direction, so that the key is guided by the key guide in a normal key pressing operation range. When the key is further depressed after a normal key is pressed, the key can be satisfactorily rolled because the elastically deformable portion can be elastically deformed in the rolling direction of the key.
In this case, if the after sensor is a strain sensor provided in the elastically deformable portion, when the key is rolled, the elastically deformable state of the elastically deformable portion can be accurately detected. It can be detected accurately.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of a keyboard device of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a sectional view taken along the line BB in FIG. 2;

FIG. 4 is a cross-sectional view showing a state in which the key in FIG. 3 is depressed.

FIG. 5 is an enlarged side view of a key stopper portion in FIG. 3;

6 shows an enlarged cross section of one of the keys corresponding to the white key in FIG. 2, (a) is a cross section in a state where the key is arranged at an upper limit position, and (b) is a key when the key is depressed. FIG. 4C is a cross-sectional view at a normal key-depressing operation position where a switch member is operated to switch, and FIG.

7A and 7B are cross-sectional views illustrating a state in which the key is rolled in a pressed state of the key illustrated in FIG. 6C, FIG. 7A illustrates a rolling state in which the key is tilted to the right, and FIG. Sectional drawing which showed the rolling state which leaned to the left.

FIG. 8 is an enlarged side view of a key stopper piece showing a modified example of a relief portion of the rolling mechanism in the first embodiment.

FIGS. 9A and 9B show a rolling mechanism of a keyboard device according to a second embodiment of the present invention, in which FIG. 9A is a cross-sectional view showing a state in which a key is arranged at an upper limit position, and FIG. FIG. 3C is an enlarged cross-sectional view illustrating a state in which a key is further depressed after a normal key is depressed, and FIG.

FIG. 10 shows a state in which the key is rolled in the pressed state of the key shown in FIG. 9C, FIG. 10A is a cross-sectional view showing a rolling state in which the key is tilted to the left, and FIG. FIG. 5 is a cross-sectional view showing a rolling state in which the right side is tilted.

FIG. 11 is a perspective view of a key part and a rolling mechanism thereof in a third embodiment of the keyboard device of the present invention.

FIG. 12 is a perspective view of a main part showing a modification of the third embodiment.

FIG. 13 is a perspective view of a key part of a keyboard device according to a fourth embodiment of the present invention, showing a key guide and a rolling mechanism thereof.

FIG. 14 is a perspective view of an essential part showing a key guide and a rolling mechanism thereof in a keyboard device according to a fifth embodiment of the present invention.

FIG. 15 is a perspective view of a main part showing a first modified example of the thin portion of the fourth and fifth embodiments.

FIG. 16 is a perspective view of a main part showing a second modified example of the thin part of the fourth and fifth embodiments.

FIG. 17 is an enlarged sectional view of a main part showing a structure in which a key is guided by a key guide in a conventional keyboard device.

18 is an enlarged cross-sectional view of a main part in a state where a gap between the key guide and the key in FIG. 17 is widened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Keyboard chassis 2 Key 3 Switch member 4 Pressure sensor 5, 25 Key guide 13, 14, 20 Guide projection 15 Relief recess 16 Notch 21 Elastic guide projection 27 Elastic guide 28, 32 Elastic deformation part 30 Upper guide 31 Lower guide part 35, 36, 40, 41 Thin part 37 Strain sensor

Claims (6)

[Claims] 1. A keyboard chassis, a plurality of keys arranged in parallel on the keyboard chassis and rotating vertically, and a plurality of keys provided on the keyboard chassis for respectively guiding the keys vertically. A key guide, and a keyboard device that further includes an after sensor that detects a force of pressing the key after the key is normally pressed, and that adds a sound effect based on a detection signal detected by the after sensor. A keyboard device comprising a rolling function for making the key rollable when the key is further depressed after the key is normally pressed. 2. The rolling function is provided on one of the key guide and the key, and provided on one of the key guide and the key. And a relief portion corresponding to the guide projection so that the key can be inserted when the key is further pressed after the normal pressing of the key to press the after sensor. Keyboard device as described. 3. The rolling function is provided on an upper side of one of the key guide and the key to guide the key relatively in a vertical direction, and is provided on a lower side of the one of the keys. 2. The keyboard device according to claim 1, further comprising: an elastic guide protrusion that is elastically deformable and guides the key relatively in the vertical direction. 4. The rolling function is provided on an upper side of the key guide to guide an upper side of the key relatively in a vertical direction, and provided on a lower side of the key guide. A lower guide portion for guiding the lower side of the key relatively in the vertical direction, and an elastic deformation portion provided between the upper guide portion and the lower guide portion and elastically deformed in the key arrangement direction. The keyboard device according to claim 1, wherein: 5. The keyboard device according to claim 1, wherein said rolling function comprises an elastically deforming portion which connects said key guide to said keyboard chassis and elastically deforms in a rolling direction of said key. 6. The keyboard device according to claim 5, wherein said after sensor is a strain sensor provided in said elastically deformable portion.