JP2011128507A - Keyboard musical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a keyboard musical instrument, wherein a whole musical instrument is made smaller without requiring to accommodate all keys in a musical instrument case. <P>SOLUTION: Connection units 7 and 10 of a plurality of keys 1 are fixed on a key support section 11 in the musical instrument case 2, and all key bodies 5 and 8 are floated in air by projecting them to outside of the musical instrument case 2 in a state where they are arranged in the order of scales. When the plurality of keys 1 are pressed in this state, deformation amounts of flexible sections 6 and 9 of the pressed key 1 are detected by a detection section 17, and boundary sections 3a and 4a between the pressed key bodies 5 and 8, and the flexible sections 6 and 9 are abutted on a stopper 12 of the musical instrument case 2, to regulate lower limit positions of the key main bodies 5 and 8. Thereby, as it is not required that all of the plurality of keys 1 are accommodated in the musical instrument case 2, the musical instrument case 2 is constituted to be compact, and the whole musical instrument is made smaller. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a keyboard instrument such as an electronic piano or an electronic organ.

  2. Description of the Related Art Conventionally, in a keyboard instrument such as an electronic piano, as described in Patent Document 1, a plurality of keys arranged in a scale order and a lower side of each rear part of the plurality of keys from a front side of each key. A keyboard frame that is arranged so as to support each rear portion of the plurality of keys so that each key can be displaced in the vertical direction, and in which a plurality of keys are arranged in order of scale and supported on the keyboard frame, Those configured to be incorporated into a musical instrument case are known.

JP 2008-76720 A

  In such a keyboard instrument, the key includes a key body, a flexible portion that is provided at a rear end portion of the key body and elastically deforms in the vertical direction in response to a key pressing operation, and a rear end portion of the flexible portion. It has the structure which has the connection part connected. The keyboard frame also has a key support part to which a plurality of key connecting parts are attached, and a stopper part that abuts the key body when the key body is depressed and regulates the lower limit position of the key body. It is configured.

  In such a conventional keyboard instrument, in order to regulate the lower limit position of the key body when the key body is pressed, the keyboard frame is extended from the rear side of the key body toward the front side of the key body. Since the key body is provided with a stopper on the part that extends to the front side so that the key body can come in and out of contact, not only the keyboard frame becomes larger, but a plurality of keys are arranged in the keyboard frame in order of scale. However, since the appearance as a keyboard instrument is impaired, it is not preferable in terms of design. Therefore, it is necessary to store all the keys in the instrument case together with the keyboard frame, which increases the size of the entire instrument.

  The problem to be solved by the present invention is to provide a keyboard instrument in which it is not necessary to store all the keys in the instrument case, and the entire instrument can be miniaturized.

In order to solve the above problems, the present invention includes the following components.
The invention according to claim 1 is a keyboard instrument comprising: a plurality of keys arranged in a scale order; and an instrument case that is arranged only at each rear part of the plurality of keys and supports each rear part of the plurality of keys. The key includes a key body, a flexible portion provided at a rear end portion of the key body and elastically deforming in a vertical direction in response to a key pressing operation of the key body, and a rear end of the flexible portion. The instrument case includes a key support part that fixes the connection parts of the plurality of keys, and the key body. And a stopper portion for restricting a lower limit position of the key body by allowing a boundary portion between the key body and the flexible portion to come into contact with and separate from each other when the key is pressed. All of the key bodies in FIG. 1 protrude outward from the instrument case in a state in which they are arranged in musical order. Is a keyboard instrument, characterized in that it is floating in the air.

  According to a second aspect of the present invention, there is provided the keyboard instrument according to the first aspect, further comprising a detection unit that detects an amount of elastic deformation of the flexible portion during the key pressing operation of the plurality of keys. is there.

  According to a third aspect of the present invention, there is provided a key body, a flexible portion that is provided at a rear end portion of the key body and elastically deforms in the vertical direction in response to a key pressing operation of the key body, and a rear portion of the flexible portion. A plurality of keys in which end portions are connected together, a plurality of keys formed integrally, a key support portion for fixing the connecting portions in a state in which the plurality of keys are arranged in a musical scale, and the key body performs a key pressing operation. A musical instrument case having a stopper portion for restricting a lower limit position of the key body when being pressed, and an elasticity of the flexible portion when the key is depressed by being disposed above the flexible portion in the musical instrument case A keyboard instrument comprising: a detection unit that detects a deformation amount.

  According to a fourth aspect of the present invention, the musical instrument case is disposed only at a position corresponding to the flexible portion and the connecting portion in the plurality of keys arranged in the scale order, and the key body of the key is The keyboard instrument according to claim 3, wherein the keyboard instrument projects outward from the instrument case and floats in the air.

  According to a fifth aspect of the present invention, when the stopper portion is operated to press the key body, a boundary portion between the key body and the flexible portion comes into contact with and separates from the lower limit position of the key body. The keyboard instrument according to claim 3 or 4, wherein the keyboard instrument is regulated.

  According to a sixth aspect of the present invention, the detection unit includes a light emitting element and a light receiving element, the light emitted from the light emitting element is irradiated to the flexible part, and the reflected light of the irradiated light is received by the light receiving unit. The keyboard instrument according to any one of claims 2 to 5, wherein an elastic deformation amount of the flexible portion is detected according to an amount of light received by the light receiving element by receiving light with the element.

  According to a seventh aspect of the present invention, when the light receiving element receives reflected light of the light irradiated to the flexible part by the light emitting element, the light receiving element responds to elastic deformation of the flexible part. The keyboard instrument according to claim 6, wherein a reflection portion for changing the amount of received light is provided.

  The invention according to claim 8 is characterized in that the circuit board on which the detection unit is mounted is attached to the musical instrument case in a state of being positioned above the flexible part. Item 8. The keyboard instrument according to Item 7.

  The invention according to claim 9 is characterized in that a cover case covering the flexible part and the upper side of the connecting part is arranged in the instrument case. The keyboard instrument.

  A tenth aspect of the present invention is the keyboard instrument according to the ninth aspect, wherein the cover case is provided with a speaker section, a switch section, and a display section.

  The invention according to claim 11 is provided with an auxiliary case that is arranged below each key body in the plurality of keys arranged in the order of scale and covers a lower side of each key body. It is a keyboard musical instrument in any one of Claims 1-10.

  According to the present invention, by fixing the connecting portions of the plurality of keys on the key support portion of the instrument case, all the key bodies in the plurality of keys are arranged from the instrument case to the outside in a state in which they are arranged in the musical scale order. It can be projected and floated in the air. For this reason, since it is not necessary to store all of the plurality of keys in the instrument case, the instrument case can be made compact, and thereby the entire instrument can be miniaturized.

  Further, according to the present invention, the plurality of key connecting portions are fixed on the key support portion of the musical instrument case, and the detection portion for detecting elastic deformation of each flexible portion in the plurality of keys is provided above each flexible portion. Therefore, the musical instrument case can be made compact. For this reason, all of the key bodies of a plurality of keys can be protruded from the instrument case and floated in the air in a state in which they are arranged in the order of the scale, so that all of the plurality of keys can be stored in the instrument case. Therefore, it is possible to reduce the overall size of the musical instrument.

1 is an external perspective view showing Embodiment 1 of an electronic keyboard instrument to which the present invention is applied. It is an expanded sectional view in the AA arrow of FIG. It is the enlarged plan view of the principal part which showed the some key in FIG. FIG. 3 shows an arrangement state of a plurality of keys in FIG. 3, (a) is an enlarged plan view of a main part showing the white key, and (b) is an enlarged plan view of the main part showing the black key. It is the expanded sectional view which showed the principal part of FIG. It is an expanded sectional view in the BB arrow view of the flexible part of FIG. It is an expanded sectional view in CC arrow of the key support part of FIG. It is the external appearance perspective view which showed Embodiment 2 of the electronic keyboard musical instrument to which this invention is applied. It is an expanded sectional view in the DD arrow of FIG. FIG. 10 is an enlarged cross-sectional view showing a main part of FIG. 9. It is an expanded sectional view of the important section showing the 1st modification of the flexible part detected by the detecting part in Embodiments 1 and 2. It is an expanded sectional view of the important section showing the 2nd modification of a flexible part detected by a detecting part in Embodiments 1 and 2.

(Embodiment 1)
A first embodiment of an electronic keyboard instrument to which the present invention is applied will be described below with reference to FIGS.
As shown in FIGS. 1 and 2, the electronic keyboard instrument is arranged only on the lower side of each of the plurality of keys 1 arranged in the order of the scales and each rear part (right side in FIG. 2) of the plurality of keys 1. A musical instrument case 2 that supports the rear portions of the plurality of keys 1 is provided.

  As shown in FIGS. 1 and 2, the plurality of keys 1 includes a plurality of white keys 3 and a plurality of black keys 4, and the white keys 3 and the black keys 4 are arranged in a musical order. In this case, as shown in FIGS. 2 to 4, the white key 3 is provided at the key body 5 and at the rear end portion (right end portion in FIG. 2) of the key body 5 for the key pressing operation of the key body 5. Accordingly, the flexible portion 6 that elastically deforms in the vertical direction and the rear end portion (right end portion in FIG. 2) of the flexible portion 6 are connected to each other, and the connecting portion 7 is continuous along the arrangement direction of the plurality of white keys 3. These are integrally formed of synthetic resin.

  In this case, as shown in FIG. 2, the key body 5 is formed in a substantially rectangular tube shape having a lower surface opened and long in the front-rear direction. As shown in FIGS. 2 and 5, the flexible portion 6 is formed in a thin and thin strip-shaped thin portion, and bends downward when the key body 5 is pressed from above. It is configured to be deformed. In addition, as shown in FIG. 6, the flexible portion 6 has a pair of rib portions 6 a formed integrally on both sides of the lower surface thereof.

  The pair of rib portions 6a secures an elastic restoring force of the flexible portion 6 that is bent and deformed when the key body 5 is depressed, and prevents the flexible portion 6 from being twisted when the key body 5 is depressed. In other words, the lower surface of the flexible portion 6 is formed to be elongated along the front-rear direction of the key body 5 (the left-right direction in FIG. 5). Further, as shown in FIGS. 3 and 4A, the connecting portion 7 is for holding the key body 5 via the flexible portion 6, and extends along the arrangement direction of the plurality of white keys 3. The flexible parts 6 of the plurality of key bodies 5 are integrally formed and connected to each other.

  Similarly to the white key 3, the black key 4 is provided at the key body 8 and the rear end portion (right end portion in FIG. 2) of the key body 8 and is moved in the vertical direction according to the key pressing operation of the key body 8. A flexible portion 9 that is elastically deformed, and a connecting portion 10 that is connected to a rear end portion (right end portion in FIG. 2) of the flexible portion 9 and that is continuous along the arrangement direction of the plurality of black keys 4; These are integrally formed of synthetic resin.

  In this case, as shown in FIG. 2, the key body 8 is formed in a substantially rectangular tube shape that is about half the length of the key body 5 of the white key 3 and is higher than the key body 5 of the white key 3. Has been. The flexible portion 9 is formed in a thin, thin strip-like thin portion that is substantially the same as the flexible portion 6 of the white key 3, and faces downward when the key body 8 is pressed from above. Are configured to bend and deform.

  As shown in FIG. 2, the flexible portion 9 is provided at a lower portion of the rear end of the key body 8 in a state of being positioned below the flexible portion 6 of the white key 3. In addition, as shown in FIG. 6, the flexible portion 9 is integrally formed with a pair of rib portions 9 a on both side portions on the lower surface thereof. The pair of rib portions 9a also secures an elastic return force of the flexible portion 9 that is bent and deformed when the key body 8 is depressed, and prevents the flexible portion 9 from being twisted when the key body 8 is depressed. In other words, the lower surface of the flexible portion 9 is formed to be elongated along the front-rear direction of the key body 8 (the left-right direction in FIG. 5).

  The connecting part 10 of the black key 4 is for holding the key body 8 via the flexible part 9 like the connecting part 7 of the white key 3, and as shown in FIG. Are formed continuously along the arrangement direction of the black keys 4, and the flexible portions 9 of the plurality of key bodies 8 are integrally connected to each other. As shown in FIG. 2, the connecting portion 10 is configured to overlap with the connecting portion 7 of the white key 3 positioned on the upper portion thereof.

  As a result, the plurality of keys 1 are stored in a state where the key bodies 8 of the plurality of black keys 4 are arranged between the key bodies 5 of the plurality of white keys 3 as shown in FIGS. The three connecting parts 7 are positioned and overlapped on the connecting part 10 of the black key 4 so that the plurality of white keys 3 and the plurality of black keys 4 are arranged in parallel in the musical order. It is configured.

  On the other hand, as shown in FIGS. 1 and 2, the musical instrument case 2 is entirely opened upward and is formed in an elongated box shape along the arrangement direction of the plurality of keys 1. As shown in FIGS. 2 and 5, the musical instrument case 2 includes a key support portion 11 to which the connecting portions 7 and 10 are attached in a state where the connecting portions 7 and 10 of the plurality of keys 1 are overlapped with each other. When the key 1 is depressed, the boundary portions 3a and 4a between the key bodies 5 and 8 and the flexible portions 6 and 9 come into contact with each other so as to be able to come into contact with each other and restrict the lower limit position of the key bodies 5 and 8. And a stopper portion 12.

  In this case, the musical instrument case 2 is formed so that the weight of the musical instrument case 2 is heavy so that the key 1 does not tilt forwardly (downwardly left in FIG. 2) due to the total weight of the plurality of keys 1. That is, the musical instrument case 2 is formed of a metal casting such as aluminum or iron, or a synthetic resin provided with a weight such as metal. As shown in FIGS. 2 and 5, the key support portion 11 is continuously formed along the arrangement direction of the plurality of keys 1 in a state of protruding upward from the bottom portion of the musical instrument case 2.

  As shown in FIG. 5, the key support portion 11 is provided with a plurality of screw holes 11 a into which the plurality of screws 13 are screwed from above, at predetermined intervals. In this case, the connecting portion 7 of the white key 3 and the connecting portion 10 of the black key 4 are provided with a plurality of screw insertion holes 13a into which the plurality of screws 13 are inserted from above, respectively, corresponding to the plurality of screw holes 11a. ing.

  Thus, as shown in FIGS. 5 and 7, the key support portion 11 is arranged on the upper surface of the key support portion 11 such that the connecting portion 7 of the white key 3 and the connecting portion 10 of the black key 4 are overlapped. In this state, a plurality of screws 13 are inserted into the screw insertion holes 13a of the connecting portions 7 and 10 from above, and the inserted screws 13 are screwed into the screw holes 11a of the key support portion 11 and tightened. A plurality of keys 1 are configured to be supported in a scaled order.

  As shown in FIGS. 2 and 5, the stopper portion 12 is formed upright at the front end portion (left end portion in FIG. 2) of the musical instrument case 2, and each of the key bodies 5, 8 and the flexible portions 6, 9. Corresponding to the lower side of the boundary portions 3a and 4a, the boundary portions 3a and 4a between the key bodies 5 and 8 and the flexible portions 6 and 9 are configured to come into contact with and separate from each other. In this case, as shown in FIG. 5, when the key bodies 5 and 8 are pressed, the stopper portions 12 are each keyed when the flexible portions 6 and 9 are most greatly bent and deformed downward. The height of the stopper portion 12 is set so that the lower ends of the tips of the main bodies 5 and 8 do not contact the placement surface T such as a tabletop.

  In addition, a circuit board 14 is incorporated in the musical instrument case 1 as shown in FIGS. That is, the circuit board 14 is equipped with an electronic circuit for electrically controlling the entire musical instrument, and is formed in a long and narrow strip shape that is continuous along the arrangement direction of the plurality of keys 1. As shown in FIGS. 5 and 7, the circuit board 14 is attached to the connecting portions 7 and 10 of the plurality of keys 1 which are overlapped with each other by a plurality of screws 16 via spacer members 15.

  In this case, the key support portion 11 that supports the connecting portions 7 and 10 of the plurality of keys 1 has a plurality of screw holes 11b into which the plurality of screws 16 are screwed from above, as shown in FIG. The screws 13 are provided at positions different from the plurality of screw holes 11a into which the screws 13 are screwed from above. Further, each of the connecting portions 7 and 10 and the spacer member 15 of the plurality of keys 1 are provided with screw insertion holes 16a for the respective screw holes 11b of the key support portion 11.

  Thereby, as shown in FIGS. 2, 5, and 7, the circuit board 14 is arranged on the key support portion 11 in a state where the connecting portions 7 and 10 are overlapped with each other. In the state where the spacer member 15 is disposed on the spacer member 15, the screw 16 is inserted from above the circuit board 14 through the spacer member 15 and the screw insertion holes 16 a of the connecting portions 7, 10. The instrument case 2 is attached by being screwed into the screw hole 11b and tightened.

  On the lower surface of the circuit board 14, as shown in FIGS. 2 and 5, a plurality of detection units 17 that detect the respective elastic deformation amounts of the flexible units 6 and 9 when the keys 1 are pressed. Each key 1 is provided correspondingly. The detection unit 17 includes a light emitting element 17a and a light receiving element 17b, irradiates the flexible parts 6 and 9 with light emitted from the light emitting element 17a, and receives reflected light of the emitted light with the light receiving element 17b. Thus, the elastic deformation amount (flexion deformation amount) of each of the flexible portions 6 and 9 is detected according to the amount of light received by the light receiving element 17b.

  Further, a cover case 18 is attached on the musical instrument case 2 as shown in FIG. On the inner lower surface of the cover case 18, a boss portion 18 a is provided so as to protrude into the instrument case 2. The boss portion 18a is formed to correspond to the boss portion 2a provided in the musical instrument case 2 so as to be opened downward from the bottom thereof.

  Thereby, as shown in FIG. 2, the cover case 18 inserts the screw 19 into the hole 2b of the boss portion 2a provided in the instrument case 2 from the lower side of the instrument case 2, and covers the inserted screw 19 The case 18 is configured to be mounted on the musical instrument case 2 by being screwed into a screw hole 18b provided in the boss portion 18a of the case 18 and tightened.

  In addition, as shown in FIGS. 2 and 5, the cover case 18 includes a plurality of circuit boards 14 positioned above the flexible portions 6 and 9 and the connecting portions 7 and 10 of the plurality of keys 1. The key 1 is configured to cover the flexible portions 6 and 9 and the connecting portions 7 and 10 of the key 1. As shown in FIG. 1, the cover case 18 is provided with a speaker unit 20, a switch unit 21, and a display unit 22.

  As shown in FIG. 1, the speaker units 20 are provided on both sides inside the cover case 18 and are configured to generate musical sounds. The switch unit 20 includes various switches for volume adjustment, tone color selection, and the like, and is distributed at locations other than the display unit 22 on the upper surface of the cover case 18. The display unit 22 is provided at a substantially central portion on the upper surface of the cover case 18 and is configured to display musical tone information electro-optically.

Next, the operation of this electronic keyboard instrument will be described.
When a key body 5 of any one of the plurality of keys 1 is pressed, the flexible portion 6 of the pressed white key 3 bends downward, and the key body 5 moves downward. It is displaced to. At this time, the flexible portion 6 and the key body 5 are favorably displaced downward without being twisted by the pair of rib portions 6a provided on both sides of the lower surface of the flexible portion 6. When the boundary portion 3a between the key body 5 of the pressed white key 3 and the flexible portion 6 abuts against the stopper portion 12 of the musical instrument case 2, the flexible portion 6 is bent and deformed, and the key body is restricted. The downward displacement of 5 is stopped.

  At this time, the detection unit 17 of the circuit board 14 provided in the instrument case 2 detects the amount of bending deformation of the flexible unit 6. That is, when the light emitting element 17 a of the detection unit 17 emits light, the light is irradiated on the flexible unit 6, and the irradiated light is reflected by the flexible unit 6, the bending deformation of the flexible unit 6 is performed. Accordingly, the reflected light whose direction of reflection has changed is received by the light receiving element 17b according to the deformation of the flexible portion 6.

  Thereby, the amount of bending deformation of the flexible portion 6 is detected according to the amount of light received by the light receiving element 17b, and a musical sound is emitted from the speaker portion 20 based on the detection result. Thereafter, the flexible portion 6 is elastically restored and returns to the original position, so that the key body 5 is displaced upward and returns to the initial position. At this time, since the elastic restoring force of the flexible portion 6 is increased by the pair of rib portions 6a provided on both sides of the lower surface of the flexible portion 6, the flexible portion 6 and the key body 5 can be quickly and without being twisted. Return to the initial position.

  Even when the key body 8 of any one of the black keys 4 among the plurality of keys 1 is pressed, the flexible portion 9 of the black key 4 bends downward as in the case of the white key 3, and the key After the main body 8 is displaced downward, the detecting portion 17 detects the amount of bending deformation of the flexible portion 9, and after releasing a musical sound according to the detection result, the flexible portion 9 The key body 8 returns to the initial position after elastic recovery.

  As described above, according to this electronic keyboard instrument, a plurality of keys 1 arranged in the scale order are provided on the key bodies 5 and 8 and the rear ends of the key bodies 5 and 8 according to the key pressing operation. Flexible portions 6 and 9 which are bent and deformed in the vertical direction, and connecting portions 7 and 10 which are connected to the rear end portions of the flexible portions 6 and 9 and are continuous in the arrangement direction of the key 1. Since the musical instrument case 2 arranged corresponding to each rear portion of the plurality of keys 1 has a key support portion 11 that fixes the connecting portions 7 and 10 of the keys 1, each key in the plurality of keys 1 In a state where all the main bodies 5 and 8 are arranged in the order of the scales, they can be protruded from the instrument case 2 and floated in the air, thereby reducing the overall size of the instrument.

  That is, in this electronic keyboard instrument, by fixing the connecting portions 7 and 10 of the plurality of keys 1 on the key support portion 11 of the musical instrument case 2, all of the key bodies 5 and 8 in the plurality of keys 1 are In an arrangement in the order of musical scales, the instrument case 2 can be protruded to the outside and floated in the air. For this reason, since it is not necessary to store all of the plurality of keys 1 in the musical instrument case 2, the musical instrument case 2 can be configured in a compact manner. Even if the entire key 1 is not housed in the musical instrument case 2, the appearance as a musical instrument is not impaired, so that a favorable design can be provided.

  In this case, when the key bodies 5 and 8 of the plurality of keys 1 are depressed, the stopper portion 12 for regulating the lower limit position of the depressed key bodies 5 and 8 is provided in the instrument case 2. Since it is provided at a location corresponding to the boundary portions 3a and 4a between the key bodies 5 and 8 and the flexible portions 6 and 9, that is, at the front end portion of the instrument case 2, the instrument case 2 is attached to each rear portion of the plurality of keys 1. It can arrange | position only in the location corresponding to a certain flexible part 6, 9 and the connection parts 7, 10, and, thereby, the musical instrument case 2 can be comprised compactly.

  Even if the musical instrument case 2 is configured in a compact manner as described above, when the key bodies 5 and 8 of the plurality of keys 1 are depressed, the flexible portions 6 and 8 of the depressed key bodies 5 and 8 are 9 is bent and deformed, and the key portions 5 and 8 and the boundary portions 3a and 4a between the flexible portions 6 and 9 are brought into contact with the stopper portion 12 provided in the musical instrument case 2, whereby the key body 5 , 8 can be reliably regulated, so that the operation of each key 1 in the key pressing operation can be kept constant, so that the key pressing operation can be performed satisfactorily as in a normal electronic keyboard instrument.

  Further, according to the electronic keyboard instrument, the connecting portions 7 and 10 of the plurality of keys 1 are fixed on the key support portion 11 of the musical instrument case 2 and the elastic portions 6 and 9 of the plurality of keys 1 are elastic. Since each detection unit 17 that detects deformation is arranged above each flexible unit 6, 9, a plurality of detection units 17 can be arranged in the vicinity of the flexible unit 6, 9 of each key 1. As a result, the musical instrument case 2 can be made compact, so that the entire musical instrument can be downsized.

  That is, in this electronic keyboard instrument, the key support part of the musical instrument case 2 for fixing the connection parts 7 and 10 of the plurality of keys 1 by arranging the detection part 17 above the flexible parts 6 and 9. Since the detection unit 17 can be satisfactorily arranged in the musical instrument case 2 without obstructing 11, the flexible case 6, 9 and the connecting unit 7 that are the rear portions of the plurality of keys 1 are arranged on the musical instrument case 2. 10 can be arranged only in the locations corresponding to 10, so that the musical instrument case 2 can be made compact.

  In this case, the detection unit 17 includes a light emitting element 17a and a light receiving element 17b, irradiates the flexible parts 6 and 9 with light emitted from the light emitting element 17a, and reflects the reflected light of the emitted light with the light receiving element 17b. By receiving light, the amount of bending deformation of the flexible portions 6 and 9 can be detected according to the amount of light received by the light receiving element 17b, so that the amount of bending deformation of the flexible portions 6 and 9 can be accurately determined in a non-contact state. Thus, it is possible to reliably detect the sound, and thus it is possible to emit a good sound according to the amount of deformation of the flexible portions 6 and 9.

  In the musical instrument case 2, a circuit board 14 that is elongated along the arrangement direction of the plurality of keys 1 and on which the plurality of detection units 17 are mounted is positioned above the flexible portions 6 and 9. As a result, the entire musical instrument can be made compact. That is, the circuit board 14 has a spacer member 15 disposed on each of the connecting portions 7 and 10 that are arranged on the key support portion 11, and is screwed by the screws 16 via the spacer member 15 and the connecting portions 7 and 10. By being mounted on the key support portion 11, the circuit board 14 can be approached above the flexible portions 6 and 9, and the circuit board 14 can be securely and compactly mounted in the instrument case 2. .

  On the lower surface of the circuit board 14, as shown in FIG. 5, a plurality of detection units 17 that detect the amount of elastic deformation of the flexible units 6 and 9 when the keys 1 are pressed are provided. Therefore, the plurality of detection units 17 can be compactly incorporated in the musical instrument case 2, and the plurality of detection units 17 can be disposed close to the flexible portions 6 and 9 of the plurality of keys 1. Therefore, the amount of bending deformation of each of the flexible portions 6 and 9 can be accurately and reliably detected by the plurality of detection portions 17.

  In this electronic keyboard instrument, the musical instrument case 2 is provided with a cover case 18 that covers the flexible parts 6 and 9 of the plurality of keys 1 and the circuit board 14 disposed above the coupling parts 7 and 10. Since the structure is attached, the cover case 18 can satisfactorily protect the flexible portions 6 and 9, the connecting portions 7 and 10 of the plurality of keys 1, and the circuit board 14 disposed above them. In addition, since these are not exposed to the outside, a product that is favorable in appearance and design can be obtained.

  In this case, since the cover case 18 is provided with the speaker unit 20, the switch unit 21, and the display unit 22, it is possible to ensure the same function as that of a normal electronic keyboard instrument even if the entire instrument is configured compactly. Can do. That is, the speaker unit 20 is provided on both sides inside the cover case 18 and can emit a musical sound. The switch unit 20 is provided in a distributed manner on the upper surface of the cover case 18 except for the display unit 22, and can easily and satisfactorily select volume adjustment, tone color selection, and the like. The display unit 22 is provided at a substantially central portion on the upper surface of the cover case 18 and can display the musical tone information in a good electro-optical manner.

(Embodiment 2)
Next, Embodiment 2 of an electronic keyboard instrument to which the present invention is applied will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
This electronic keyboard instrument is different from the first embodiment in the mounting structure of the circuit board 14 with respect to the musical instrument case 2 and has a configuration in which an auxiliary case 30 is disposed below the key bodies 5 and 8 of the plurality of keys 1. Except for this, the configuration is substantially the same as in the first embodiment.

  That is, in the musical instrument case 2, as shown in FIGS. 9 and 10, in addition to the boss portion 2a corresponding to the boss portion 18a provided on the inner lower surface of the cover case 18, the boss portion 31 to which the circuit board 14 is attached. Is provided. The circuit board 14 is provided with screw insertion holes 14 a corresponding to the boss portions 31 of the musical instrument case 2.

  As a result, the circuit board 14 is disposed on the boss portion 31 of the musical instrument case 2 as shown in FIGS. 9 and 10, and in this state, the screw 32 passes from above through the screw insertion hole 14 a of the circuit board 14. The instrument case 2 is attached by being screwed into the screw hole 31a and tightened. In this case, when the boss portion 18a of the cover case 18 and the boss portion 2a of the musical instrument case 2 are attached by screws 19, the circuit board 14 is configured to be sandwiched between them. In addition, the circuit board 14 is disposed on the connecting portions 7 and 10 of the plurality of keys 1 that overlap each other via a spacer member 15.

  On the other hand, as shown in FIGS. 8 and 9, the auxiliary case 30 covers each key body 5, 8 except for the upper surface side of each key body 5, 8 of the plurality of keys 1. A bottom plate portion 30a that is disposed on the lower surface of the key body 5 and extends to the front end portion (left end portion in FIG. 9) of each key body 5, and an intermediate portion on each front end surface of each key body 5, 8 from the front end portion of the bottom plate portion 30a And a side plate portion 30c provided to stand slightly higher than the front plate portion 30b on both sides of the bottom plate portion 30a.

  Accordingly, as shown in FIGS. 8 and 9, the auxiliary case 30, except for the upper surface side of each key body 5, 8 of the plurality of keys 1, the lower side of each key body 5, 8, the front end side, By covering both sides, the key bodies 5 and 8 of the plurality of keys 1 are pushed upward from the lower side, the key bodies 5 and 8 are pushed in the arrangement direction of the keys 1, and each key The front end portions (left end portion in FIG. 9) of the main bodies 5 and 8 are configured not to be pushed toward the rear side (right end portion in FIG. 9).

  According to such an electronic keyboard instrument, in addition to the same effects as in the first embodiment, the circuit board 14 is mounted on the boss portion 31 of the instrument case 2 by the screws 32. It can be attached to the musical instrument case 2 separately from the connecting portions 7 and 10, thereby making it easy to adjust the arrangement state of the plurality of keys 1 and securely and firmly attaching the circuit board 14 to the musical instrument case 2. be able to. In this case, the circuit board 14 is sandwiched between the boss portion 18a of the cover case 18 and the boss portion 2a of the musical instrument case 2 when the circuit board 14 is attached by the screws 19, so that the musical instrument is further enhanced. It can be firmly attached to the case 2.

  In addition, the keyboard instrument includes an auxiliary case 30 that is disposed below the key bodies 5 and 8 of the plurality of keys 1 and covers the lower side of the key bodies 5 and 8. It is possible to prevent the key bodies 5 and 8 of the plurality of keys 1 from being pushed upward from the lower side, whereby each of the plurality of keys 1 can be controlled by an external force from the lower side of the key bodies 5 and 8. It is possible to prevent the flexures 6 and 9 from being damaged.

  In this case, the auxiliary case 30 is disposed on the lower surface of the musical instrument case 2 and extends to the front end portions (left end portions in FIG. 9) of the key bodies 5 and 8, and each key from the front end portion of the bottom plate portion 30a. A front plate portion 30b provided upright toward the middle portion of each front end surface of the main body 5, 8 and a side plate portion provided upright on both sides of the bottom plate portion 30a at the same height as the front plate portion 30b. 30c, it is possible to cover the lower side, front end side, and both sides of each key body 5, 8 except for the upper surface side of each key body 5, 8 of the plurality of keys 1.

  For this reason, besides being able to prevent the key bodies 5 and 8 of the plurality of keys 1 from being pushed upward from the lower side by the auxiliary case 30, the key bodies 5 and 8 are arranged from the direction in which the keys 1 are arranged. It is possible to prevent the key main bodies 5 and 8 from being pushed toward the rear side from the front end portion thereof. Since it is possible to prevent a load from being applied to 9, it is possible to reliably prevent the flexible portions 6 and 9 from being damaged by an external force other than the key pressing operation of the plurality of keys 1.

  In the first and second embodiments described above, when the flexible portions 6 and 9 of the plurality of keys 1 are bent and deformed by a key pressing operation, the amount of bending deformation of the flexible portions 6 and 9 is directly detected. Although the case where it comprised so that it may detect by the part 17 was described, it is not restricted to this, For example, like the 1st modification shown by Fig.11 (a) and FIG.11 (b), each flexible part 6, 9 may be provided with a reflective projection 35.

  That is, the first modified example shown in FIGS. 11A and 11B has a configuration in which the reflective protrusions 35 are provided on the upper surfaces of the flexible portions 6 and 9. The reflection projection 35 is formed on a curved reflection surface 31a that is curved on the rear side (right side in FIG. 11) of the key 1, and is formed on a vertical surface 35b that is substantially vertical on the front side (left side in FIG. 11). . When the key 1 is pressed and each of the flexible portions 6 and 9 bends downward, the reflection projection portion 35 has a gentle inclination angle of the reflection curved surface 35a with respect to the lower surface of the circuit board 14. It is configured.

  As a result, as shown in FIG. 11B, the reflective protrusion 35 has the reflection curved surface 35 a with respect to the lower surface of the circuit board 14 as the key 1 is depressed and the flexible portions 6 and 9 bend downward. When the inclination angle becomes gentle, the light emitted from the light emitting element 17a of the detection unit 17 and applied to the reflection curved surface 35a is reflected toward the light receiving element 17b.

  In addition, as shown in FIG. 11A, the reflection projection 35 is provided with a reflection curved surface 35a with respect to the lower surface of the circuit board 14 in a state where the flexible portions 6 and 9 are substantially horizontal without the key 1 being depressed. In a state where the inclination angle is steep, the light emitted from the light emitting element 17a of the detection unit 17 and applied to the reflection curved surface 35a is reflected in a direction slightly away from the light receiving element 17b.

  According to such an electronic keyboard instrument, when the plurality of keys 1 are pressed and the flexible portions 6 and 9 are bent and deformed, the inclination angle of the reflection projection portion 35 changes according to the bending deformation. The amount of bending deformation of the flexible portions 6 and 9 according to the key pressing operation can be detected more accurately than the first and second embodiments by the detection unit 17, and according to the key pressing force of the key 1 pressed by this. It is possible to generate a good tone.

  Further, not only in the first modified example, but also in the second modified example shown in FIG. 12A and FIG. 12B, for example, each of the flexible portions 6 and 9 is provided with a reflecting portion 36. Also good. In other words, the second modification has a configuration in which a reflecting portion 36 that forms a concave mirror is provided on the upper surface of each of the flexible portions 6 and 9. The reflector 36 is formed as a concave mirror that collects the irradiated light at the focal position P when light is emitted from the light emitting element 17a of the detector 17.

  For this reason, as shown in FIG. 12B, the reflecting portion 36 is bent by the key 1 and the flexible portions 6 and 9 are bent downward, and accordingly the focal position of the reflecting portion 36. When P is shifted, the focal position P is configured to be positioned on the light receiving element 17b of the detection unit 17. Further, as shown in FIG. 12A, the reflecting portion 36 has a focal position P of the reflecting portion 36 when the key 1 is not depressed and the flexible portions 6 and 9 are substantially horizontal. The detection unit 17 is configured to be slightly away from the light receiving element 17b.

  According to such an electronic keyboard instrument, when the plurality of keys 1 are pressed and the flexible portions 6 and 9 are bent and deformed, the focal position P of the reflecting portion 36 is changed according to the bending deformation. The amount of bending deformation of each of the flexible portions 6 and 9 according to the key pressing operation can be detected more accurately than the first and second embodiments by the detection unit 17, so that the key is pressed as in the first modification. The tone corresponding to the key pressing force of the key 1 can be sounded satisfactorily.

DESCRIPTION OF SYMBOLS 1 Key 2 Musical instrument case 3 White key 4 Black key 5, 8 Key body 6, 9 Flexible part 6a, 9a Rib part 7, 10, Connection part 11 Key support part 12 Stopper part 13, 16, 19, 32 Screw 14 Circuit board DESCRIPTION OF SYMBOLS 17 Detection part 17a Light emitting element 17b Light receiving element 18 Cover case 20 Speaker part 21 Switch part 22 Display part 30 Auxiliary case 30a Bottom plate part 30b Front plate part 30c Side plate part 35 Reflection protrusion part 36 Reflection part

Claims (11)

A keyboard instrument comprising a plurality of keys arranged in musical order, and an instrument case that is arranged only at each rear portion of the plurality of keys and supports each rear portion of the plurality of keys,
The key includes a key body, a flexible portion that is provided at a rear end portion of the key body and elastically deforms in the vertical direction in response to a key pressing operation of the key body, and a rear end portion of the flexible portion is connected. And a connecting portion that continues along the arrangement direction of the plurality of keys,
The instrument case includes a key support portion that fixes the connecting portion, and a boundary portion between the key body and the flexible portion that comes into contact with and separates from the key body when the key body is pressed. And a stopper part that regulates the lower limit position of
A keyboard instrument characterized in that all of the key bodies of the plurality of keys are arranged in the order of musical scale and protrude outward from the instrument case and float in the air.   The keyboard instrument according to claim 1, further comprising a detection unit configured to detect an elastic deformation amount of the flexible portion when the plurality of keys are pressed. A key body, a flexible portion that is provided at a rear end portion of the key body and elastically deforms in a vertical direction in response to a key pressing operation of the key body, and a connecting portion to which the rear end portion of the flexible portion is connected Multiple keys all formed in one piece,
A musical instrument case having a key support portion for fixing the connecting portion in a state in which the plurality of keys are arranged in a musical scale, and a stopper portion for restricting a lower limit position of the key body when the key body is depressed. ,
A keyboard instrument comprising: a detection unit disposed above the flexible part in the instrument case and detecting an elastic deformation amount of the flexible part when the key is depressed.   The musical instrument case is disposed only at a position corresponding to the flexible portion and the connecting portion in the plurality of keys arranged in the musical scale order, and the key body of the key protrudes outside from the musical instrument case. The keyboard instrument according to claim 3, wherein the keyboard instrument floats in the air.   The stopper portion restricts a lower limit position of the key body by abutment of a boundary portion between the key body and the flexible portion so that the key body can be contacted and separated when the key body is pressed. The keyboard instrument according to claim 3 or 4.   The detection unit includes a light emitting element and a light receiving element, irradiates the light emitted by the light emitting element to the flexible part, and receives the reflected light of the irradiated light by the light receiving element, thereby receiving the light receiving element. 6. The keyboard instrument according to claim 2, wherein an elastic deformation amount of the flexible portion is detected according to an amount of light received by the element.   Reflection for changing the amount of light received by the light receiving element according to elastic deformation of the flexible part when the light receiving element receives reflected light of light emitted from the light emitting element. The keyboard instrument according to claim 6, further comprising a portion.   The circuit board on which the detection unit is mounted is attached to the musical instrument case in a state of being positioned above the flexible portion. Keyboard instrument.   The keyboard instrument according to any one of claims 1 to 8, wherein a cover case that covers an upper side of the flexible part and the connecting part is disposed in the instrument case.   The keyboard instrument according to claim 9, wherein the cover case includes a speaker unit, a switch unit, and a display unit. 11. The auxiliary case according to any one of claims 1 to 10, further comprising an auxiliary case that is disposed below each key body of the plurality of keys arranged in a musical scale order and covers a lower side of each key body. The keyboard instrument described in crab.

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