JP2009037168A - Electronic keyboard musical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic keyboard musical instrument reinforced in casing structure to effectively support an upper face part which covers a rear part of a keyboard. <P>SOLUTION: This electronic keyboard musical instrument has a plurality of keys 1 turnably mounted to a frame 3 provided on a base 5, and rear parts 1a of the keys 1 are covered with the upper face part 2. The upper face part 2 is composed of a control panel, for instance, and supported onto the frame 3 by one or more stays 9 passing through clearances formed between the keys at the rear parts 1a of the keys 1. A leg part 3d is formed in the position of the frame 3 supporting each stay 9 and connected to the base 5. A mass body 6 interlocked with each key 1 is housed between the front edge 3b and the leg part 3d of the frame 3. A stay fastening part B2 connecting the lower end 9a of the stay 9 to the frame 3 is located in a clearance between the keys different from the clearance through which a body of the stay 9 passes, and a leg part fastening part B1 connecting a bottom plate 3e of the frame leg part 3d to the base 5 is also located in the clearance between the keys. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic keyboard instrument having a housing reinforcing structure for supporting an upper surface member.

2. Description of the Related Art Conventionally, in a keyboard device for an electronic musical instrument, a device in which the back of the keyboard is covered with a cover panel is known from Patent Document 1, for example. Further, for example, Patent Document 2 discloses that a mass body is driven in response to a key pressing operation to give an appropriate key pressing feeling or a wood texture is given to a key.
Japanese Utility Model Publication No. 7-14490 JP 2003-271127 A

  In the electronic keyboard instrument, as in Patent Document 2, in addition to the method of providing a mass body drive unit connected to the key or adding a wood texture to the key, the length of the key itself can be increased. The operational feeling of the system can be improved. When an upper surface member such as a cover panel of Patent Document 1 is provided at the upper rear side of such a keyboard, a portion covering the rear portion of the keyboard of the upper surface member becomes longer according to the depth length of the keyboard, but this portion is supported. There is nothing to do, so if an external force is applied, the keyboard may be activated or damaged. To prevent this, it is conceivable to increase the strength by increasing the thickness of the panel extension or by providing ribs, but it is difficult to mold so that distortion does not occur, and there is sufficient strength. I can't get it.

  In view of such circumstances, an object of the present invention is to provide an electronic keyboard instrument in which a casing structure is reinforced so that an upper surface portion covering a rear portion of a keyboard can be effectively supported.

  According to the main feature of the present invention, a frame (3) to which a plurality of keys (1) are rotatably attached, a floor (5) that supports the frame (3), and a rear part of the key (1) ( 1a) and one or more stays arranged between the upper surface (2) and the frame (3) and disposed between the upper surface (2) and the frame (3). And the frame (3) is an electronic keyboard instrument having legs (3d, 3S) connected to the floor (5) at the position where the stay (9) is provided. Item 1] is provided. Note that the parentheses indicate reference symbols, terms, and the like of the examples added for convenience of understanding, and the same applies to the following.

  In the electronic keyboard instrument according to the present invention, the individual mass bodies (6) linked to the respective keys (1) are accommodated between the front edge (3b) and the leg portions (3d, 3S) of the frame (3). [Claim 2] It can constitute as follows.

  In the electronic keyboard instrument according to the present invention, a stay fastening portion (B2) connected to the frame (3) is provided at the lower end (9a) of the stay portion (9), and the stay fastening portion (B2) It can be configured such that it is located between the key (1) and the key (1) different from the key through which the key (9) passes.

  Furthermore, in the electronic keyboard instrument according to the present invention, the lower end (3e, 3Sb) of the leg (3d, 3S) is provided with a leg fastening part (B1) connected to the floor (5), and the leg fastening part. (B1) can be configured to be located between the key (1) and the key (1).

  An electronic keyboard instrument according to the present invention (Claim 1) basically has a plurality of keys (1) rotatably attached to a frame (3) provided on a floor (5). The rear portion (1a) has a housing structure that is covered with the upper surface portion (2), and the upper surface portion (2) is constituted by a control panel, for example. In the present invention, in order to reinforce such a housing structure, 1 to 1 arranged so as to pass through a gap between the key (1) and the key (1), that is, a gap formed between the keys in the key rear portion (1a). The upper surface portion (2) is supported on the frame (3) by the plurality of stay portions (9), and the frame (3) supporting the stay portion (9) is connected to the floor portion (5). The frame leg portions (3d, 3S) thus formed are formed.

  That is, the upper surface portion (2) and the frame (3) are provided with a stay portion (in the vicinity of the upper portion of the frame ground portion (3e, 3Sb), which is a connection portion between the frame leg portions (3d, 3S) and the floor portion (5)). 9) Since a portion for receiving is provided, even if the upper surface portion (2) is carelessly pressed, the force applied to the frame (3) via the stay portion (9) is transmitted through the frame leg portions (3d, 3S). The frame (3) is not deformed or distorted because it is firmly received by the strong floor (5). Therefore, according to the present invention, even in a keyboard in which the length of the rear portion of the key is increased in order to obtain a piano-type operation feeling, the upper surface portion covering the rear portion of the key is effectively applied to the floor portion by the stay portion and the frame leg portion. Therefore, it is possible to provide an electronic keyboard instrument that is supported in a manner that does not cause malfunction even when a force is applied to the upper surface portion.

  In the electronic keyboard instrument according to the present invention, a mass body (6) interlocking with each key (1) is housed between the front edge (3b) and the legs (3d, 3S) of the frame (3). Item 2). That is, the frame grounding portion (3e, 3Sb) is provided at an intermediate portion (intermediate region) between the distal end portion of the mass body (6) and the rotation fulcrum (4a) of the key (1). Therefore, according to the present invention, it is possible to obtain an electronic keyboard instrument with a further enhanced piano-type operation feeling.

  In the electronic keyboard instrument according to the present invention, the stay fastening portion (B2) for connecting the lower end (9a) of the stay portion (9) to the frame (3) is a gap between the key (1) and the key (1), that is, the rear of the key. It is located at a position corresponding to a gap generated between the keys of the portion (1a) and corresponding to a gap different from the gap through which the main body of the stay portion (9) passes (claim 3). That is, the gap through which the fastening portion (B2) can be seen and the gap through which the stay (9) penetrates are separated. Therefore, according to this invention, it becomes easy to work when mounting the stay portion, and the efficiency of the mounting work can be improved.

  Furthermore, in the electronic keyboard instrument according to the present invention, the leg fastening portion (B1) for connecting the lower ends (3e, 3Sb) of the legs (3d, 3S) to the floor (5) is also provided with the key (1) and the key (1 ) Is installed at a position corresponding to the gap (claim 3). For example, when the frame is mounted, the stay portion (9) is fixed to the floor portion (5) with the leg fastening member (B1) using a gap between certain keys, and in use, between the different keys. The upper surface portion (2) is supported by the stay portion (9) penetrating the gap. Therefore, according to the present invention, it is possible to improve the efficiency of the stay portion attaching operation and to effectively support the upper surface portion by the stay portion, despite the limited space of the gap between the keys.

[Basic housing structure of keyboard device]
FIG. 1 shows an upper appearance of an electronic keyboard instrument according to an embodiment of the present invention. In the electronic keyboard instrument according to one embodiment of the present invention, the upper surface portion 2 is provided so as to cover the back of the keyboard 1 composed of a plurality of keys. In this example, the upper surface portion 2 is composed of a control panel on which panel elements such as panel operators and indicators are placed, and the rear edge (FIG. 1: upper end) is the rear wall of the instrument housing or keyboard device housing. The overhanging portion that covers the back of the keyboard 1 has a floating structure. Each key of the keyboard 1 has a relatively long key length, and the rear part of the key is also long. Accordingly, in the control panel 2, the depth of the portion protruding above the key rear is increased accordingly. Note that the size of the front and rear (depth) direction (FIG. 1: up and down direction) is referred to as “length” and the size in the left and right direction is referred to as “width” when the keyboard 1 is viewed from the user who performs.

  In this electronic keyboard instrument, a plurality of keys 1 are rotatably attached to a frame provided on a base (floor), and the rear end of each key 1 is provided at the rear end of the frame upper plate. It is connected at the key rotation fulcrum. In addition, a mass body drive unit connected to each key 1 is accommodated in the frame, and coupled with the fact that the length of the key itself (key length) is formed longer, the user can feel like a piano. It can give a sense of operation.

  The control panel 2 is made of a material that is lightweight but easily bent, such as a synthetic resin (plastic). Therefore, if the lower part of the panel is left floating, there is no strength, so if a force is applied from above, it will be easily bent, and the tendency is particularly strong near the center in the left-right direction, so it is necessary to increase the strength. In this electronic keyboard instrument, the control panel 2 is supported on the frame by one or more stays (consisting of stay mechanisms and stay parts, also called stay portions) that pass through the gap between the keys.

  In other words, the rear portion of each key 1 is narrower than the front portion of the key operated by the user, and therefore, the lower surface of the control panel 2 and the upper surface of the frame are fixed to each other using a gap formed between the rear portions of the key. In this case, the control panel 2 is connected in the vertical direction, and the control panel 2 is supported on the frame at any intermediate position in the left-right direction by the stay. However, simply supporting the control panel 2 with a stay causes problems as described below.

  FIG. 2 is a side sectional view of a main part for explaining a problem in stay installation. As described above, the key length of the keyboard is relatively long, and the control panel provided at the upper rear part of the keyboard extends (hangs out) from the rear of the device, and each frame is provided behind the frame provided at the lower part of the keyboard. A pivot fulcrum of the key is formed. In the example of FIG. 2, the frame has a cross-sectional shape obtained by rotating the letter “U” 90 ° counterclockwise, and the mass body drive unit is housed between the front and rear edges of the frame. For example, as shown in FIG. 2 (1), when the white key is pressed by the user, the pressed white key rotates around the key rotation fulcrum as shown by the broken line, The mass body (hammer) connected to the white key also rotates from the solid line position to the broken line position to give the user a desired keystroke feeling.

  A stay that supports the control panel is installed on the upper plate of the frame. When the stay is installed at the frame position as shown in FIG. When pressed, a large moment is generated in the control panel with respect to the base part where the rear edge of the frame is joined to the floor board. That is, since the distance (arm length) Rp between the acting line Lp of the force received by the stay and the base portion is large, the moment between the stay and the base portion is large, and the control panel and the frame upper plate portion have insufficient strength. It is deformed as shown by the broken line.

[Reinforced housing structure]
In the electronic keyboard instrument according to one embodiment of the present invention, a frame leg is formed at the position of the frame that supports the stay, and the frame is connected to the base (floor) by the frame leg. It is possible to reinforce the basic casing structure by increasing the support capability, and to effectively support the control panel that covers the rear part of the keyboard. 3 and 4 are diagrams for explaining a keyboard apparatus according to the first and second embodiments of the present invention.

(1) First Embodiment In the keyboard device according to the first embodiment, as shown in FIG. 3 (2), the top view on the left side (Top View), the surface of the key 1 is decorated as a white key and a black key. It consists of a front part and a rear part 1a with a pivot point at the rear end. The rear portion 1a of the key 1 is narrower than the front portion, and is designed to be longer than the keyboard device disclosed in Patent Documents 1 and 2 and the like, as shown in the side sectional view of the main portion in FIG. The entire panel is covered with a control panel (upper surface portion) 2.

  As shown in FIG. 3 (1), the frame 3 provided at the lower part of the keyboard 1 includes an upper plate portion (upper surface plate) 3a, a front support portion (front support plate) 3b, a front base portion 3c, and a leg portion 3d. The casing is made of synthetic resin or metal, and the upper plate portion 3a is divided into a front upper plate portion 3a1 and a rear upper plate portion 3a2 by a leg portion 3d. The rear end of each key rear portion 1a is rotatably supported by a key rotation fulcrum 4a of a key support portion 4 provided on the rear upper plate portion 3a2 of the frame 3, and the frame 3 includes the front base portion 3c and It is fixed on a base (also referred to as a floor or a base plate) 5 by a leg 3d.

  A mass body drive unit including a mass body (hammer) 6 connected to the key 1 is housed in the frame inner space between the front support portion 3b and the leg portion 3d below the front upper plate portion 3a1, and the front upper plate portion. An intermediate portion of the mass body 6 is rotatably supported by a mass body rotation fulcrum of the mass body support portion 7 provided on the lower surface of 3a1. When the key 1 is not operated, the key 1 and the mass body 6 are in the illustrated positions, and the tip of the mass body 6 is on a lower cushioning member (cushion) 9 provided on the upper surface of the base (floor portion) 5. Is retained. When the key 1 is depressed, the front end of the key 1 is lowered as described with reference to FIG. 2 (2), and the mass body 6 is raised accordingly, on the lower surface of the front upper plate portion 3a1. When the movement of the mass body 6 is stopped by the provided upper cushioning member (cushion) 9 and then the key 1 is released, the key 1 and the mass body 6 return to the illustrated positions, and the lower cushioning member 9 causes the mass body 6 to move. The movement of 6 is stopped.

  Further, one or more stays 9 extending in a substantially vertical direction are mounted on a frame leg portion 3d including a rear end portion of the front upper plate portion 3a1 of the frame 3 and a front edge portion of the rear upper plate portion 3a2. The upper end of the stay 9 extending in the vicinity immediately above the portion 3d is connected to the lower surface of the control panel 2. In other words, the stay 9 having the lower end 9a fixed to the frame leg 3d is fixed to the lower surface of the control panel 2 at a position immediately above the frame leg 3d. It is supported by the leg 3d of the frame 3 via. In the case of the minimum number (= 1), the stays 9 are preferably provided at the center in the left-right direction, and in the case of a plurality (> 1), the stays 9 are preferably provided at symmetrical positions at equal intervals in the left-right direction. Further, the installation position of the stay 9 in the front-rear direction is included in a range that is considered to represent the point of action on the control panel 2 assuming that external force is applied at various positions in the front-rear direction. It is set at a location where the panel 2 can be supported without hindrance (for example, avoiding a panel element placed on the control panel 2).

  In this example, the stay 9 is a synthetic resin or metal plate-like body in which the front section viewed from the user side (the section when the stay 9 is cut by a vertical plane parallel to the left-right direction) has a “U” shape. The upper end portion has an outer surface parallel to the lower surface of the control panel 2. The lower end portion 9a of the stay 9 has an outer surface parallel to the upper surfaces of the upper plate portions 3a1 and 3a2 of the frame 3, and the width in the left-right direction is longer than the upper end portion. A cushion material is bonded to the outer surface of the upper end portion of the stay 9. When the upper end portion of the stay 9 is attached to the frame 3, the cushion material is interposed between the lower surface of the control panel 2 and the upper surface of the control panel 2. Then, the control panel 2 and the upper end of the stay 9 are fixed by inserting a screw (screw) from the top, whereby the control panel 2 and the stay 9 are brought into close contact with each other.

  Further, in order to attach the lower end portion 9a of the stay 9 to the frame 3, as shown in the side view (Side View) on the right side of FIG. 3 (2), the stay lower end portion 9a is attached to the frame leg portion 3d with a fastening member B1 such as a screw. Stick in the vicinity. It should be noted that any other method can be employed for fixing the stay 9. For example, the stay 9 with the cushion material may be bonded to the control panel 2 using an adhesive. When the frame 3 is made of synthetic resin, the stay 9 and the frame 3 may be formed by integral molding.

  On the other hand, the leg portion 3d has a substantially “V” -shaped or “U” -shaped side section (a section when the leg portion 3d is cut by a vertical plane parallel to the front-rear direction) in this example. The bottom plate (also referred to as a grounding portion) 3e of the leg portion 3d is flat, and functions as a support member (base portion) that supports the frame 3 on the base 5 by fixing the bottom plate 3e to the base 5. . A region in the front-rear direction between the tip of the mass body 6 that rotates together with the key and the key rotation fulcrum 4a is called an intermediate region. In this keyboard device, as described above, the leg portion 3d and the grounding portion 3e of the frame 3 are provided in the intermediate region, and the stay 9 and the stay fixing portion (the portion that receives the stay) of the control panel 2 are located immediately above the grounding portion 3e. ) Is provided.

  Accordingly, the distance (arm length) Ra between the acting line La of the force received by the stay 3 and the leg bottom plate (base portion) 3e is reduced, and the moment around the base portion 3e between the stay 3 and the base portion 3e is large. Therefore, the function of supporting the control panel 2 by the stay 9 can be improved. In the illustrated example, the upper end of the stay 3 is fixed to a place that effectively supports the floating portion of the control panel 2 without hindrance, and the installation position of the frame leg 3d has a margin between the mass body drive unit. Since the distance (arm length) Ra is not completely zero (0), Ra = 0 is preferable as circumstances allow. That is, it is preferable that the stay 9 and the frame leg portion 3d are provided so that the stay fixing portion of the control panel 2 and the center of the stay 9 and the frame leg portion 3d are substantially straight from top to bottom as much as possible.

  With reference to FIG. 3B, an example of an installation mode of the leg 3d and the stay 9 will be described. In this example, in order to attach the leg 3d to the base 5, a method of fastening the bottom plate 3e of the leg 3d to the base 5 with a screw B1 is employed. In this case, as shown in the top view on the left side of the figure, fastening holes (screw mountings) are provided at a plurality of positions facing a plurality of gaps generated between the rear portions 1a of the respective keys 1 with respect to the leg bottom plate 3e and the base 5. The leg bottom plate 3e is fastened to the base 5 by inserting the leg fastening screw B1 from above into the fastening holes of the leg bottom plate 3e and the base 5.

  Thus, by positioning the leg fastening member B1 in the gap between the keys, the leg fastening member B1 and the tool can be inserted from the gap between the keys in a state where each key 1 is provided. It is possible to improve workability when mounting the apparatus.

  Similarly, the gap between the keys can be used for installing the stay 9. That is, first, fastening holes (screw mounting portions) are provided at positions near the leg portions 3d corresponding to the gaps between the keys on the upper plate portions 3a1 and 3a2 of the frame 3. Next, a plate-like stay intermediate part which is the main body of the stay 9 passes through a gap different from this gap and protrudes upward from the key 1, and a fastening hole (screw mounting) provided in the lower end part 9 a of the stay 9. The stay 9 is arranged on the frame 3 so that the portion) matches the fastening hole of the frame 3. Then, the stay fastening screw B2 is inserted from above into the fastening holes of the stay lower end portion 9a and the frame upper plate portions 3a1 and 3a2, and the stay lower end portion 9a is fastened near the frame leg portion 3d.

  As described above, although the installation space (space) of the stay 9 is limited to the gap between the keys, the stay fastening member B2 and the tool are inserted in the gap between certain keys to perform the work at the time of mounting. In addition to improving the performance, the control panel 2 can be effectively supported by disposing the main body of the stay 9 in the gap between the different keys. In other words, in a limited space such as a gap between the keys, the leg fastening member B1 has a plurality of functions that cannot be filled in one gap, such as support of the control panel 2 by the stay 9 and attachment of the stay 9 to the frame 3. This is realized by dispersing the gaps in separate gaps, that is, a gap with a gap and a gap through which the stay penetrates.

  As described above, in the electronic keyboard instrument according to the embodiment of the present invention, the plurality of keys 1 are rotatably attached to the frame 3 provided on the base 5, and the rear portion 1 a of the key 1 is the upper surface portion 2. Covered. The upper surface portion 2 is configured by, for example, a control panel, and is supported on the frame 3 by one or more stays 9 passing through a gap generated between the keys of the rear portion 1a of the key 1. A leg 3 d is formed at the position of the frame 3 that supports the stay 9, and the leg 3 d is connected to the base 5. Between the front edge 3b and the leg 3d of the frame 3, a mass body 6 that is linked to each key 1 is stored. The stay fastening portion B2 that connects the lower end portion 9a of the stay 9 to the frame 3 is located in a gap between the keys that is different from the gap through which the main body of the stay 9 passes. The leg fastening portion B1 to be connected is also located in the gap between the keys.

(2) Second Embodiment As shown in FIG. 4, the keyboard device according to the second embodiment has the structure, operation and function of the keyboard periphery (1, 4 to 8), the form of the control panel 2 and the stay 9, and both of them. The coupling mode is almost the same as that of the keyboard device according to the first embodiment described with reference to FIG. 3, but the configuration related to the legs of the frame 3 is different.

  The frame 3 provided at the lower part of the keyboard 1 is composed of an upper plate portion (upper surface plate) 3a, a front support portion (front support plate) 3b, and a front base portion as shown in a side cross section of the main portion shown in FIG. 3c. In the middle region of the upper plate portion 3a, a frame support (leg portion) 3S that supports the frame 3 vertically with respect to the base 5 is provided. The frame 3 is formed by the front base portion 3c and the frame support 3S. It is fixed on the base 5.

  Similarly to the stay 9, the frame support 3S is made of a synthetic resin or metal plate-like body whose front section viewed from the user side has a “U” shape, and its upper end 3Sa is an upper frame plate 3a. The lower end portion (also referred to as a base portion or a frame grounding portion) 3Sb has an outer surface parallel to the upper surface of the base 5. As shown in the side view (Side View) on the right side of FIG. 4B, the lower end 3Sb of the frame support 3S is fixed to the base 5 with a leg fastening member B1 such as a screw. The upper end 3Sa of the frame support 3S can be fixed to the frame 3 together with the lower end 9a of the stay 9 by a stay fastening member B1 such as a screw.

  On the upper plate portion 3a of the frame 3, the lower end portion 9a of the stay 9 is attached to the attachment position of the frame support 3S. That is, as in the first embodiment, the stay 9 and the stay fixing portion (the portion receiving the stay) of the frame 3 are provided in the vicinity immediately above the frame grounding portion 3Sb, and the upper end of the stay 9 extending upward from the stay fixing portion is controlled. Connected to the lower surface of the panel 2.

  Accordingly, also in the second embodiment, the distance (arm length) Ra between the line of action La of the force received by the stay 3 and the base portion 3Sb of the frame support 3S is reduced, and the base portion between the stay 3 and the base portion 3Sb is reduced. Since the magnitude of the moment around 3Sb is reduced, the function of supporting the control panel 2 by the stay 9 can be improved. However, in this example, compared with the first embodiment, the mounting position of the frame support 3S is displaced rearward for convenience of installation, and the intermediate support portion of the stay 9 is tilted forward. ) Ra is slightly longer.

  An example of an installation mode of the stay 9 will be further described with reference to FIG. In this example as well, as in the first embodiment, the stay 9 can be fixed on the frame 3 using the gap between the keys. The upper plate portion 3a of the frame 3 and the upper end portion 3Sa of the frame support 3S are formed with fastening holes (screw mounting portions) at positions corresponding to the gaps between the keys. A fastening hole (screw mounting portion) provided in the lower end portion 9a of the stay 9 is formed as a fastening hole for the predetermined frame 3 and the frame support body 3S in a state where the key 1 is projected through the gap different from the gap. The stay 9 is arranged on the frame 3 so as to match. Then, a stay fastening screw B2 is inserted from above into the fastening holes of the stay lower end 9a, the frame 3 and the frame support 3S, and between the stay lower end 9a, the frame upper plate 3a and the frame support upper end 3Sa. Conclude.

  In this example, the fastening holes (screw mounting portions) of the frame upper plate portion 3a and the frame support upper end portion 3Sa are formed at intervals shorter than the arrangement interval of the stays 9 in the left-right direction, and the stays 9 are not arranged. In the place, the frame support upper end portion fastening screw B3 is inserted from above the frame upper plate portion 3a to fasten the frame upper plate portion 3a and the frame support upper end portion 3Sa.

  In this way, as in the first embodiment, by positioning the leg fastening member B1 in the gap between the keys, the keyboard device can be mounted from the gap between the keys with each key 1 provided. The stay 9 can be efficiently installed on the frame 3 by inserting the leg fastening member B1 and the tool, and when using the keyboard device, the upper surface 2 is firmly secured by the stay 9 that penetrates the gap between the other keys. Can be supported. In other words, it is possible to provide a keyboard device that improves the efficiency of attaching the stay 9 to the frame 3 and effectively supports the control panel 2 with the stay 9 in spite of the limited space between the keys. it can.

[Various Embodiments]
The preferred embodiment of the present invention has been described in detail with reference to the drawings. However, this is merely an example, and various modifications can be made without departing from the spirit of the present invention. For example, the upper surface portion covering the back of the keyboard has been described as being configured by the control panel in the embodiment, but is not limited thereto. For example, a cover panel may be used.

  Regarding the installation of the stay, in the embodiment, the stay fastening member (B2) is provided in a gap different from the gap where the stay comes out (between the keys). A fastening member (B2) may be provided.

  For connection between the components of the keyboard device housing such as the upper surface portion (2), stay (9), frame (3), frame support (3S), base (5), etc. Although it may be assembled separately, two or more housing components may be integrally formed and combined. In this case, an arbitrary fixing method other than a screw or an adhesive can be used for the assembly. Moreover, when the housing | casing structural element connected mutually is comprised with a synthetic resin, it is preferable to produce these elements by integral molding to the extent possible.

  Arbitrary shapes can be adopted for the stay (9), the frame leg (3d), and the frame support (3S). For example, the shape of the stay or the frame support may be a “work” -shaped front section. Moreover, although the number of stays and frame supports is the same, the number of frame supports may be greater than the number of stays. About a frame support body, you may comprise by one member whose side cross-section is "U" shape or "work" shape.

  As for the shape of the frame (3), for example, a rear support member configured similarly to the front support portion 3b and the front base portion 3c of FIGS. 3 and 4 may be provided in the vicinity of the rear end of the upper plate portion (3a). Good. Moreover, about the frame leg part (3d), although the side cross section used "V" shape in the Example, arbitrary shapes can be employ | adopted. For example, both the side cross section and the front cross section have a "V" shape or a "U" shape, that is, a shape like a square tube cup (however, the caliber in the left-right direction> the caliber in the front-rear direction), as shown in FIG. Alternatively, the upper plate portion (3a) may be divided into front and rear, and one upper plate portion (3a) may be formed with a rectangular hole.

1 shows an external appearance of an electronic keyboard instrument according to an embodiment of the present invention. It is a figure for demonstrating the problem in stay installation. The principal part of the keyboard apparatus by 1st Embodiment of this invention is shown. The principal part of the keyboard apparatus by 2nd Embodiment of this invention is shown.

Explanation of symbols

1,1a keyboard (white key and black key) and the rear part of each key,
2 Control panel (upper surface),
3 frame [3a: upper plate portion, 3b: front support portion (front edge), 3d: leg portion, 3e: bottom plate (base portion or grounding portion)],
3S frame support (leg part) [3Sb: lower end part (base part or frame grounding part)],
4, 4a Key rotation support part and fulcrum,
5 base (base plate, floor),
6 Mass body (hammer),
9 Stay (stay mechanism, stay parts, stay section),
B1, B2 Leg fastening members and stay fastening members.

Claims (4)

A frame on which a plurality of keys are rotatably mounted;
A floor that supports the frame;
An upper surface part covering the rear part of the key;
Including one or a plurality of stay portions disposed between the keys and between the upper surface portion and the frame,
The electronic keyboard instrument, wherein the frame has legs connected to the floor at a position where the stay is provided.   The electronic keyboard instrument according to claim 1, wherein each mass body interlocking with each key is accommodated between a front edge of the frame and the leg portion.   A stay fastening portion connected to the frame is provided at a lower end of the stay portion, and the stay fastening portion is located between a key and a key different from a key through which the stay portion passes. The electronic keyboard instrument according to claim 1 or 2, characterized in that   The leg lower part of the said leg part is provided with the leg part fastening part connected with the said floor part, This leg part fastening part is located between a key, The key in any one of Claims 1-3 characterized by the above-mentioned. The electronic keyboard instrument according to item 1.

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