JP6507475B2 - Keyboard instrument - Google Patents

Description

  The present invention relates to a keyboard instrument.

2. Description of the Related Art Conventionally, there is known a configuration in which a key cover (keyboard lid) covering a keyboard in a keyboard instrument is housed inside the instrument. However, in such a configuration, the entire keyboard instrument becomes large in order to secure a space for housing the key cover.
Although it is conceivable to reduce the space for storing the key cover by forming the key cover with a flexible material or by finely folding it, it does not change the influence on the size of the keyboard instrument.
Further, although a speaker is provided inside the keyboard instrument, depending on the position where the key cover is stored, it may interfere with the sounding or resonance from the speaker and may affect the output of the musical tone.

Therefore, a configuration has also been proposed in which the key cover is stored in the lower part outside the keyboard instrument without being stored in the inside of the keyboard instrument (see, for example, Patent Document 1).
Specifically, a key cover (keyboard lid) in which a front lid covering the front end side of the keyboard portion arranged in the instrument main body and a back lid covering the upper side of the keyboard portion are flexibly connected by a bending connection portion is It is movably accommodated on the lower side of the instrument main body located below the keyboard by a pivoting support which is a lid opening / closing mechanism.
If such a configuration is adopted, there is no need to secure a storage place for the key cover inside the keyboard instrument, and the whole keyboard instrument can be miniaturized accordingly.

JP, 2010-072264, A

However, as in the configuration described in Patent Document 1, when the entire key cover in which the front lid and the rear lid are connected by the bending connection portion is moved to the lower part of the keyboard instrument and stored, the key cover is moved. It is necessary to turn the entire key cover a lot.
For this reason, a somewhat large space is required to open and close the key cover. In addition, since the movement for opening and closing the key cover becomes large, there is a problem that smooth opening and closing are difficult when, for example, a child or the like uses a keyboard instrument.

  Furthermore, when the key cover is closed, the front cover covering the front end of the keyboard overlaps with a part of the key cover, which increases the depth of the keyboard instrument, and the cover (keyboard lid) The number of parts also increases because the front cover must be provided separately.

  The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a keyboard instrument capable of easily opening and closing a key cover and miniaturizing the entire instrument. It is a thing.

In order to solve the above problems, the keyboard instrument according to the present invention covers the keyboard on which the performance operation is performed, the instrument main body provided with the guide grooves in the side plate, and covers the upper side of the keyboard. And a key cover unit in which a first front cover member and a second front cover member are connected in series via a hinge shaft, and a side portion on the rear end side of the second front cover member is provided. A locking projection is provided, and the locking cover and the hinge shaft slide along the guide groove, whereby the key cover unit can be shifted to an open state in which the keyboard is opened above the keyboard; The guide groove is continuous with a wide portion wider than the diameter of the locking projection and below the wide portion, and a width narrower than the diameter of the locking projection and wider than the diameter of the hinge shaft It is characterized by having a narrow portion.
Further, a keyboard instrument according to another aspect of the present invention includes a keyboard to be operated and a musical instrument main body that accommodates the keyboard and is provided with a guide groove formed along the vertical direction in the side plate, A key cover unit in which a front cover member and a second front cover member are continuously connected via a hinge shaft, and a protrusion is provided on a side portion, and the key cover unit is located above the keyboard After the second front cover member is disposed on the front side of the musical instrument body by sliding the projection along the guide groove from the closed state covering the second musical instrument, the second front cover member is the musical instrument. In the state on the front side of the main body, the first front cover member is rotated about the hinge axis to shift to the open state in which the first front cover member is disposed on the lower surface side of the instrument main body It is characterized by being possible.

  According to the present invention, the key cover can be easily opened and closed, and the overall size of the musical instrument can be reduced.

It is a top view in the closed state of the keyboard instrument of this embodiment. It is principal part sectional drawing in the closed state of the keyboard instrument of this embodiment. (A) is an enlarged view of a part in FIG. 1, (b) is an enlarged view of b part in FIG. 2, (c) is an enlarged view of c part in FIG. It is principal part sectional drawing of the keyboard instrument which shows the state which rotated the back cover member and 2nd front cover member of FIG. FIG. 5 is a cross-sectional view of an essential part of the keyboard instrument showing a state in which the first front cover member and the second front cover member in FIG. 4 are slid downward. It is principal part sectional drawing of the keyboard musical instrument which shows the state which rotated the 1st front cover member of FIG. 5 below the musical instrument main body. (A) is an enlarged view of a part in FIG. 4, (b) is an enlarged view of b part in FIG. It is a top view of the open state of the keyboard instrument in this embodiment.

One embodiment of a keyboard instrument according to the present invention will be described with reference to FIGS. 1 to 8. In the present embodiment, the case where the keyboard musical instrument is an electronic musical instrument such as an electronic piano or a keyboard will be described as an example.
The embodiments described below are subject to various technically preferable limitations for practicing the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

FIG. 1 is a top view of the keyboard instrument of the present embodiment in a closed state, and FIG. 2 is a cross-sectional view of the main parts of the keyboard instrument of the present embodiment in a closed state.
3 (a) is an enlarged view of a portion in FIG. 1, FIG. 3 (b) is an enlarged view of b portion in FIG. 1, and FIG. 3 (c) is an enlarged view of c portion in FIG. FIG.
4 to 6 are principal part cross-sectional views showing the key cover unit of the keyboard instrument of the present embodiment in an open state.
7 (a) is an enlarged view of a portion in FIG. 4 and FIG. 7 (b) is an enlarged view of b portion in FIG.
As shown in FIG. 1 and the like, the keyboard instrument 1 of the present embodiment includes an instrument main body 2, a keyboard 3 and a key cover unit 4.

As shown in FIG. 2, the instrument main body 2 has a housing portion 21 which is a space for housing the keyboard 3 and the like, and a bottom plate 22 constituting the bottom surface of the housing portion 21 and a rear end portion of the bottom plate 22. A rear plate 23 erected from the rear end of the keyboard instrument 1, the right end in FIG. 2 and the like, and a pair of side plates 24 attached to the bottom plate 22 and the left and right ends of the rear plate 23, respectively. And.
The pair of side plates 24 constitute a side surface of the instrument main body 2 and define left and right side portions of the housing portion 21. In FIG. 1 and the like, only the side plate 24 on one side is shown.
Further, at the upper end portion of the back plate 23, the rear end portion of the top plate 25 constituting the rear upper surface of the instrument main body 2 is attached. The top board 25 is bridged over the pair of side plates 24 and protrudes toward the front of the keyboard instrument 1 so as to cover the upper rear of the instrument body 2.

Further, the musical instrument main body 2 is provided with a substrate, a speaker, and the like (not shown) for controlling the sound generation operation and the like in the keyboard musical instrument 1.
In the present embodiment, the substrate, the speaker, and the like are housed, for example, in the electronic component housing portion 222 provided on the rear side of the keyboard instrument 1 which is the lower surface (the lower surface in FIG. 2) of the bottom plate 22. There is.
Furthermore, although not shown, the musical instrument main body 2 is provided with an operation switch unit (not shown) having a plurality of switches and the like for selecting and designating various functions such as the volume and tone of the keyboard instrument 1. The operation switch portion is disposed, for example, on the upper surface of the top plate 25, the side plate 24, or the like.
In addition, the position etc. in which a board | substrate, a speaker, an operation switch part, etc. are provided are not limited to what was illustrated here.

The keyboard 3 is housed in the housing portion 21 of the instrument main body 2. In the instrument body 2, a keyboard chassis 5 for supporting the keyboard 3 is provided.
The keyboard 3 is composed of a large number of keys (white key and black key) 31 arranged on the keyboard chassis 5. The rear end portion of each key 31 is rotatably attached to a key support portion 51 provided at the rear end portion of the keyboard chassis 5 via a rotation shaft 52. Each key 31 is urged upward by an urging member (not shown), and when the key pressing operation to depress the key 31 is performed, the front end side is downward with the axis center of the rotation shaft 52 as the rotation center When the key pressing operation is stopped, it is pushed up by the biasing force of the biasing member and pivoted upward to return to the original position.

The key cover unit 4 covers the upper side of the keyboard 3 in the closed state (see FIGS. 1 and 2), and opens the upper side of the keyboard 3 in the open state (see FIGS. 6 and 8).
In the present embodiment, the key cover unit 4 is configured by three components of a rear cover member 41, a first front cover member, and a second front cover member.

The rear cover member 41 covers the upper rear of the keyboard 3 in the closed state. The rear cover member 41 is rotatably attached to a front end portion of the top plate 25 covering the upper rear of the instrument main body 2 via a hinge shaft 251.
In this embodiment, at the left and right ends of the top panel 25 of the instrument main body 2 and at the front end of the keyboard instrument 1, a rear cover supporting portion 252 serving as a bearing of the hinge shaft 251 supporting the rear cover member 41 is provided. It is provided. The hinge shaft 251 is inserted into the rear end portion of the rear cover member 41 along the longitudinal direction of the rear cover member 41, and the tip end portion protrudes from the left and right end portions of the rear cover member 41.
The distal end portion of the hinge shaft 251 is locked to the rear cover support portion 252, so that the rear cover member 41 can rotate about the axial center of the hinge shaft 251 as a rotation center.
The hinge shaft 251 is not limited to one inserted through the rear cover member 41. For example, the hinge shaft may be a protrusion integrally formed on both sides of the rear cover member 41 on the rear end side. By integrally forming the hinge shaft with the rear cover member 41 in this manner, the number of parts can be reduced.

  In the present embodiment, in the closed state, as shown in FIG. 2 etc., the rear cover member 41 has the rear end of the rear cover member 41 mounted on the front end of the upper surface of the top plate 25. The front end portion of the rear cover member 41 is in contact with the rear end portion of the second front cover member 43. Thereby, the rear cover member 41 is held so that the front end side does not fall below the top plate 25 and is maintained in a substantially parallel state with the bottom plate 22.

Further, as shown in FIG. 4 to FIG. 6, in the present embodiment, the rear cover member 41 pivots backward (rightward in FIG. 4 etc.) with the axis center of the hinge shaft 251 as the pivot center in the open state. The upright state can be held at a position having a predetermined angle with respect to the top plate 25.
That is, the rear cover support portion 252 of the present embodiment is provided with a stopper mechanism (not shown), and the rear cover member 41 is held at a predetermined angle by this stopper mechanism. In addition, the structure of the stopper mechanism which hold | maintains the back cover member 41 in the position of a predetermined angle is not specifically limited, A well-known structure is applicable.
Here, "a position of a predetermined angle" is an angle suitable for erecting a musical score, various portable terminal devices, a tablet terminal device or the like. Since the rear cover member 41 can be held at a predetermined angle, the rear cover member 41 can have a function as a music stand when the key cover unit 4 is in the open state.

In addition, the above-mentioned "position of a predetermined angle" is not limited to the example of illustration, but can be set suitably.
Further, the “predetermined angle position” is not limited to one, and may be configured to be able to adjust the angle arbitrarily in a plurality of stages.
For example, although FIGS. 4 to 6 illustrate the state in which the rear cover member 41 is maintained at an angle of about 45 degrees with respect to the top plate 25, in addition to this, a position having an angle of about 70 degrees The angle adjustment may be made stepwise or steplessly so that the standing state can be maintained even by the like. With this configuration, it is possible to adjust the angle of the rear cover member 41 to an angle that makes it easy for the user to see the music score or the like.
In addition, for example, the rear cover member 41 may be rotatable to a position overlapping with the top plate 25 substantially in parallel. As described above, by configuring the rear cover member 41 so as to be rotatable to a position where the rear cover member 41 overlaps the top panel 25 substantially in parallel, the rear cover member 41 can be folded unobtrusively when not used as a music stand.

The first front cover member 42 functions as a front covering portion that covers the front end side (front side) of the keyboard 3 in the closed state.
That is, as shown in FIG. 2, in the closed state where the key cover unit 4 is closed, the first front cover member 42 is disposed on the front end side (front side) of the keyboard 3.
The upper end portion of the first front cover member 42 has substantially the same height as the upper end portion of the key 31 in a state where the key is not depressed, and almost the entire front end side of the keyboard 3 is made by the first front cover member 42 It is supposed to be covered.

Further, the first front cover member 42 can be disposed on the lower surface side of the musical instrument main body 2 in the open state so as to be substantially parallel to the lower surface.
The magnet 221 is provided on the lower surface (the lower surface in FIG. 2 and the like) of the bottom plate 22 in the present embodiment, and the lower end in the closed state shown in FIG. In the open state shown in FIG. 6, an iron piece 422 is provided on the surface opposite to the instrument main body 2).
The iron piece 422 is attached to the magnet 221 of the bottom plate 22 when the first front cover member 42 is disposed on the lower surface of the bottom plate 22 (that is, when the key cover unit 4 is opened; see FIG. 6). The iron cover 422 is attracted to the magnet 221 when the key cover unit 4 is in the open state, and the first front cover member 42 is arranged on the lower surface of the bottom plate 22 when the key cover unit 4 is in the open state. Is able to maintain.
In addition, the iron piece 422 and the magnet 221 should just be provided in the mutually corresponding position, and the arrangement etc. are not limited to the example of illustration.

The second front cover member 43 is disposed so that the rear end side abuts on the front end side of the rear cover member 41 and covers the upper front of the keyboard 3 in the closed state.
In the present embodiment, as shown in FIG. 1 and FIG. 3A, the rear end portion of the second front cover member 43 is provided with a locking projection 431 which is formed to project on both left and right sides. In addition, a locking recess 245 in which the locking projection 431 is locked at a position corresponding to the position where the locking projection 431 of the second front cover member 43 is arranged at the upper end of the side plate 24 in the closed state. Is formed.
In the closed state, the locking projection 431 is locked in the locking recess 245, and in this state, the rear end side of the second front cover member 43 abuts on the front end side of the rear cover member 41. As a result, the upper side of the keyboard 3 is covered by the second front cover member 43 and the rear cover member 41, and the front end side of the rear cover member 41 butts against the rear end side of the second front cover member 43. , And the position (height) of the front end side of the rear cover member 41 is held.

Further, as shown in FIG. 3C and the like, the second front cover member 43 is continuously provided to the first front cover member 42 via a front cover connecting shaft 421 which is a hinge shaft.
The front cover connecting shaft 421 is provided at a connecting portion between the first front cover member 42 and the second front cover member 43, and the first front cover member 42 and the second front cover member 43 It is relatively rotatable around the center of the cover connecting shaft 421 as a rotation center.
Both end portions of the front cover connecting shaft 421 project outward beyond both end portions of the first front cover member 42 and the second front cover member 43.

As shown in FIG. 2 and FIG. 3C, in the present embodiment, the guide groove 241 is vertical (vertical) on the inner surface of each side plate 24 and on the front end side (front side) of the keyboard instrument 1. The both ends of the front cover connecting shaft 421 are engaged with the guide grooves 241 of the side plates 24, respectively.
The guide groove 241 of the present embodiment has a wide portion 242 wider than the diameter of the locking projection 431 provided on the second front cover member 43 and a locking projection 431 continuous to the lower side of the wide portion 242. And a narrow portion 243 whose width is smaller than the diameter of the front cover connecting shaft 421 and narrower than the diameter of the front cover connecting shaft 421, as shown in FIG. 1 and FIG. It is open.
The guide groove 241 may be provided to penetrate to the lower end surface of each side plate 24 or may be formed to a position (height) substantially the same as the position on the back surface side of the bottom plate 22 of the instrument main body 2 .

The first front cover member 42 slides in the vertical direction (vertical direction in FIG. 2 and the like) along the front surface of the instrument main body 2 by the front cover connecting shaft 421 being guided along the guide groove 241 of the side plate 24. It is configured to be movable.
In the present embodiment, as shown in FIG. 4 and FIG. 7A, the front direction of the keyboard instrument 1 is moved to a position where the second front cover member 43 is substantially aligned with the first front cover member 42 (FIG. The front cover connecting shaft 421 is slidable along the guide groove 241 of the side plate 24 when it is turned in the left direction or the like.
Further, the second front cover member 43 connected to the first front cover member 42 via the front cover connecting shaft 421 is also guided along the guide groove 241 of the side plate 24 by the front cover connecting shaft 421. , And can slide along the front of the instrument body 2.
The diameter of the locking projection 431 of the second front cover member 43 is smaller than the width of the wide portion 242 of the guide groove 241 and larger than the width of the narrow portion 243. The sliding movement is performed in the wide portion 242, but is locked in front of the narrow portion 243.
As a result, the first front cover member 42 and the second front cover member 43 do not move below the position where the locking projection 431 is locked, and the first front cover member 42 and the second front cover member 42 are not moved. The downward movement of the front cover member 43 is prevented.

Thus, in a state where the first front cover member 42 and the second front cover member 43 are guided along the guide groove 241 to the position where the locking projection 431 is locked in front of the narrow portion 243, The first front cover member 42 is in a state of hanging down substantially vertically from the front end side (front side) of the instrument main body 2 (the state shown in FIG. 5).
At this time, by rotating the first front cover member 42 to the rear side of the instrument main body 2 with the axis center of the front cover connecting shaft 421 as the rotation center, the first front cover member 42 can be mounted as shown in FIG. As shown in FIG. 7B, the lower surface side of the instrument main body 2 is disposed so as to be substantially parallel to the lower surface.

Further, the second front cover member 43 is disposed on the front end side (front side) of the keyboard 3 when the first front cover member 42 is disposed at a position substantially parallel to the lower surface of the instrument main body 2 in the open state. In other words, in a state where the locking projection 431 is locked in front of the narrow portion 243, the second front cover member 43 replaces the first front cover member 42 in the front end side of the keyboard 3 , And functions as a front covering portion covering the front end side (front side) of the keyboard 3.

In the present embodiment, the length of the wide portion 242 of the guide groove 241 is the same as the length of the second front cover member 43 (the rear cover member 41 is engaged from the front end connected to the first front cover member 42). It is set according to the length to the rear end to be stopped.
That is, when the key cover unit 4 is in the open state and the second front cover member 43 is in the state of constituting the front covering portion, the locking projection 431 is engaged in front of the narrow portion 243 of the guide groove 241. By being stopped, the second front cover member 43 is positioned at a predetermined position.
Here, when pressing the keyboard 3, if the second front cover member 43 constituting the front cover portion is at a position higher than the upper surface of the front end of the keyboard 3, the key 31 is pushed to the bottom. When the upper end portion of the second front cover member 43 and the finger pressing the key 31 interfere with each other, the key pressing becomes difficult.
Therefore, as shown in FIG. 5 and the like, the second front cover member 43 has a position where the upper end is slightly lower than the height of the upper surface of the front end of the keyboard 3 (for example, the key 31 is pushed all the way to the bottom Is preferably positioned to stop at approximately the same height as the top surface of the front end of the key 31), and the length of the wide portion 242 is such that the second front cover member 43 is located at such a position. It is set to the length which can be locked.

  Next, the operation of the keyboard instrument 1 in the present embodiment will be described.

First, in the closed state of the key cover unit 4, as shown in FIGS. 1 and 2, the rear upper portion of the keyboard 3 is covered by the rear cover member 41, and the front end side of the keyboard 3 is covered by the first front cover member 42. The front upper portion of the keyboard 3 is covered by the second front cover member 43.
In this closed state, as shown in FIGS. 1 and 3A, the locking projection 431 of the second front cover member 43 is locked in the locking recess 245 of the side plate 24 of the instrument main body 2, The front cover member 43 and the first front cover member 42 connected to the front cover member 43 are positioned.
Further, as shown in FIG. 3B, the rear end side of the second front cover member 43 is in contact with the front end side of the rear cover member 41, thereby supporting the front end portion of the rear cover member 41. The position of the rear cover member 41 is maintained.

When the key cover unit 4 is opened, the rear cover member 41 is pivoted rearward with the center of the hinge shaft 251 as the pivot center.
For example, as shown in FIGS. 4 to 6, the rear cover member 41 is rotated to a position having a predetermined angle, such as an angle of about 45 degrees, with respect to the top plate 25, and the standing state is raised by the stopper mechanism. Hold it. As a result, the back cover member 41 can be used as a music stand or the like. In addition, when a musical score is not required, the back cover member 41 may be tilted to a position overlapping in parallel with the top panel 25.

Next, the locking projection 431 is removed from the locking recess 245 to bring up the second front cover member 43, and the keyboard instrument 1 shown by a two-dot chain line in FIG. The second front cover member 43 is pivoted in the forward direction (left direction in FIG. 2).
As shown in FIG. 4, when the second front cover member 43 is rotated to a position substantially aligned with the first front cover member 42, the front cover connecting shaft 421 and the locking projection 431 are moved to the guide groove 241. In the locked state, the first front cover member 42 and the second front cover member 43 are moved downward (downward in FIGS. 4 to 6) along the front surface of the instrument main body 2. The first front cover member 42 and the second front cover member 43 have a front cover connecting shaft 421 and a locking projection 431 along the guide groove 241 provided on the side surface (i.e., the side plate 24) of the musical instrument main body 2 By being guided, it slides smoothly along the front of the instrument body 2.

As shown in FIG. 5 and FIG. 7B, when the locking projection 431 comes to the front of the narrow width portion 243 of the guide groove 241, the locking projection 431 is locked in front of the narrow width portion 243. The first front cover member 42 and the second front cover member 43 are positioned at the corresponding positions.
In this state, as shown in FIG. 5, the second front cover member 43 is disposed on the front end side (front side) of the keyboard 3 instead of the first front cover member 42, and the first front cover member 42 is It is in the state of hanging down on the front end side (front side) of the instrument main body 2.

Furthermore, the first front cover member 42 is pivoted rearward (rightward in FIG. 5) indicated by the double-dotted arrow in FIG. 5 with the center of the front cover connecting shaft 421 as the pivot center. Thereby, as shown in FIG. 6, the first front cover member 42 is disposed on the lower surface side of the musical instrument main body 2 so as to be substantially parallel to the lower surface. At this time, the iron piece 422 provided on the first front cover member 42 is attracted to the magnet 221 provided on the bottom plate 22 of the instrument main body 2 so that the first front cover member 42 It is fixed to the lower surface of the instrument body 2).
FIG. 8 is a top view showing the keyboard instrument in the open state in the present embodiment.
In the keyboard instrument 1 of the present embodiment, as shown in FIG. 6, the rear cover member 41 is held upright at a position having a predetermined angle with respect to the top panel 25, and the second front cover member 43 is used as the keyboard 3. As shown in FIG. 8, the key cover unit is disposed on the front end side (front side) of the main body and the first front cover member 42 is disposed on the bottom side of the instrument main body 2 substantially in parallel with the bottom side. 4 is in the open state, and it becomes possible to play by pressing the key 31.

When the key cover unit 4 in the open state is closed again, the iron piece 422 is first pulled away from the magnet 221 to cause the first front cover member 42 (that is, it is pivoted downward in FIG. 6) Let me). Then, when the first front cover member 42 hangs down below the instrument main body 2, the first front cover member 42 is positioned to cover the front end (front side) of the keyboard 3. The member 42 and the second front cover member 43 are slid upward.
Next, the second front cover member 43 is rotated backward (rightward in FIG. 4) about the center of the front cover connecting shaft 421 as the rotation center, and the locking projection 431 is locked in the locking recess 245 Let
Furthermore, the front end of the rear cover member 41 abuts on the front center of the hinge shaft 251 as the rotation center until the front end of the rear cover member 41 abuts on the rear end of the second front cover member 43 (left direction in FIG. Rotate to). As a result, the key cover unit 4 is closed.

As described above, according to the present embodiment, the rear cover member 41 that covers the upper rear of the keyboard 3 in the closed state is configured to be slidable along the front surface of the instrument body 2 in the vertical direction. A first front cover member 42 that covers the front end side (front side) of the third 3 and can be disposed on the lower surface side of the instrument main body 2 so as to be substantially parallel to the lower surface in an open state; And the rear cover side is in contact with the front end side of the rear cover member 41 in the closed state. A second front cover member which covers the upper front and can be disposed on the front end side of the keyboard 3 when the first front cover member 42 is disposed at a position substantially parallel to the lower surface of the instrument body 2 in the open state 43 and the keyboard instrument It is equipped.
Thus, when the key cover unit 4 is in the open state, the rear cover member 41, the first front cover member 42 and the second front cover member 43 are not housed inside the instrument main body 2, and the instrument main body 2 It is not necessary to secure a space for housing the key cover in the keyboard instrument 1 because the keyboard cover 1 is kept outside. Further, various electronic components incorporated in the musical instrument main body 2 can be arranged without being restricted by the accommodation space by the key cover. Thereby, the keyboard instrument 1 whole can be miniaturized.
In addition, since the key cover does not interfere with the sound output from the speaker provided in the keyboard instrument 1, the keyboard instrument 1 with good sound quality can be realized.
Further, in the closed state, the first front cover member 42 functions as a front covering portion that covers the front end side (front side) of the keyboard 3, and in the open state, the second front cover member 43 is the front end of the keyboard 3 It is placed on the side and acts as a front covering. For this reason, it is not necessary to separately provide a member disposed on the front end side (front side) of the keyboard 3, and the number of parts can be reduced and the device can be miniaturized.
Also, the key cover unit 4 is divided into three parts, and when opening and closing this, the first front cover member 42 and the second front cover member 43 constituting the key cover unit 4 are the instrument main body Move along the outline of 2. Therefore, the operation for opening and closing the key cover unit 4 can be small, and even a child or the like can perform the opening and closing operation of the key cover easily and safely.
Further, in the present embodiment, a guide groove 241 for guiding the first front cover member 42 and the second front cover member 43 is a locking projection 431 provided on the rear end side of the second front cover member 43. A wide portion 242 wider than the diameter and a narrow portion continuous below the wide portion 242 and narrower than the diameter of the locking projection 431 and wider than the diameter of the front cover connecting shaft 421 as a hinge axis The second front cover member 43 is positioned at a predetermined position by the locking projection 431 being locked in front of the narrow portion 243 of the guide groove 241 in the open state. As a result, the second front cover member 43 and the first front cover member 42 connected to the second front cover member 43 do not fall downward. In addition, the second front cover member can be slid by sliding the first front cover member 42 and the second front cover member 43 to a position at which the locking projection 431 is locked, even if alignment is not particularly performed. 43 is disposed on the front end side (front side) of the keyboard 3, and the second front cover member 43 can function as a front cover.
In addition, the rear cover member 41 is configured to be able to rotate backward about the axis of the hinge shaft 251 as the rotation center in the open state and to maintain the upright state at a position having a predetermined angle with respect to the top plate. . Thereby, the back cover member 41 can be functioned as a music score, and there is no need to provide a music score separately, and the reduction in the number of parts and the downsizing and weight reduction of the device can be realized.

  Although the embodiments of the present invention have been described above, it is needless to say that the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention.

For example, in the present embodiment, the iron piece 422 is provided on the first front cover member 42, and the magnet 221 is provided on the bottom plate 22 of the instrument main body 2. However, a magnet is provided on the first front cover member 42. An iron piece may be provided on the bottom plate 22 of the main body 2.
Further, the configuration for fixing the first front cover member 42 to the bottom plate 22 of the musical instrument main body 2 in the closed state is not limited to the one using the magnet. For example, the first front cover member 42 may be locked to the bottom plate 22 by a hook or the like.

Further, in the present embodiment, the rear cover member 41 is supported by the rear end side of the second front cover member 43 being in contact with the front end side of the rear cover member 41 in the closed state. The configuration for supporting is not limited to this.
For example, the rear end portion of the second front cover member 43 is provided with a locking portion projecting rearward, and the front end side of the rear cover member 41 is supported by being placed on the locking portion. It is also good. When the locking portion is provided at the rear end of the second front cover member 43, the rear cover member 41 can be supported more reliably and stably even when the weight of the rear cover member 41 is heavy. it can.

  Further, in the present embodiment, the locking projection 431 is locked in the guide groove 241 having the wide portion 242 and the narrow portion 243 so that the first front cover member 42 and the second front cover member 43 fall off. While the first front cover member 42 and the second front cover member 43 are prevented from coming off and positioning is not limited to the ones exemplified here. .

Although some embodiments of the present invention have been described above, the scope of the present invention is not limited to the embodiments described above, but includes the scope of the invention described in the claims and the equivalents thereof. .
In the following, the invention described in the claims initially attached to the request for this application is appended. The item numbers of the claims described in the appendix are as in the claims attached at the beginning of the application for this application.
[Supplementary Note]
<Claim 1>
The keyboard on which the performance operation is performed,
An instrument body accommodating the keyboard;
A key cover unit that covers the upper side of the keyboard;
Equipped with
The key cover unit has a first front cover member which can be disposed on the lower surface side of the musical instrument main body after sliding the front side of the musical instrument main body downward. Keyboard instrument.
<Claim 2>
The key cover unit is
A second front cover member which is continuously connected to the first front cover member via a hinge shaft and can be arranged on the front side of the musical instrument main body after being slid along the front face of the musical instrument main body The keyboard instrument according to claim 1, characterized in that
<Claim 3>
A locking projection is provided on the rear side of the second front cover member,
Guide grooves are formed in the vertical direction in the side plate of the instrument body,
The guide groove is
A wide portion wider than the diameter of the locking projection;
A narrow portion which is continuous with the wide portion and which is narrower than the diameter of the locking projection and wider than the diameter of the hinge shaft;
The keyboard instrument according to claim 1 or 2, characterized in that
<Claim 4>
The key cover unit is
A rear cover member attached to the front end of the top plate covering the upper rear of the musical instrument body via a hinge shaft, pivoting backward with the axis of the hinge shaft as the rotation center and capable of holding an upright state; The keyboard instrument according to any one of claims 1 to 3, characterized in that it has.

DESCRIPTION OF SYMBOLS 1 keyboard instrument 2 musical instrument main body 3 keyboard 4 key cover unit 22 bottom plate 24 side plate 41 rear cover member 42 first front cover member 43 second front cover member 221 magnet 241 guide groove 242 wide portion 243 narrow portion 245 engaged Recess 251 Hinge shaft 421 Front cover connecting shaft 422 Iron piece 431 Locking projection

Claims (4)

The keyboard on which the performance operation is performed,
An instrument body that accommodates the keyboard and is provided with a guide groove in the side plate;
A key cover unit that covers the upper side of the keyboard and in which a first front cover member and a second front cover member are connected in series via a hinge shaft;
Equipped with
A locking projection is provided on the rear side of the second front cover member,
By sliding the locking projection and the hinge shaft along the guide groove, the key cover unit can be shifted to an open state in which the upper portion of the keyboard is opened,
The guide groove is continuous with a wide portion wider than the diameter of the locking projection and below the wide portion, and the width is narrower than the diameter of the locking projection and wider than the diameter of the hinge shaft A keyboard instrument characterized by having a narrow portion. The keyboard on which the performance operation is performed,
An instrument main body that accommodates the keyboard and is provided with a guide groove formed along the vertical direction in the side plate;
A key cover unit in which a first front cover member and a second front cover member are connected in series via a hinge shaft, and a projection is provided on a side thereof;
Equipped with
After the key cover unit from a closed state covering the upper side of the keyboard, is arranged the second front cover member on the front side of the instrument body and the protrusion by sliding along the guide groove, wherein With the second front cover member on the front side of the musical instrument body, the first front cover member is rotated about the hinge axis to lower the first front cover member on the lower surface of the musical instrument body. A keyboard musical instrument characterized by being able to shift to an open state disposed on the side. The first front cover member can be disposed on the lower surface side of the musical instrument body after sliding the front side of the musical instrument body downward.
The second front cover member can be disposed on the front side of the musical instrument body after being slid along the front surface of the musical instrument body. Keyboard instrument. The key cover unit is
A rear cover member attached to the front end of the top plate covering the upper rear of the musical instrument body via a hinge shaft, pivoting backward with the axis of the hinge shaft as the rotation center and capable of holding an upright state; The keyboard instrument according to any one of claims 1 to 3, characterized in that it has.

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