JP2542280Y2 - Keyboard instrument arm - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brace used for a keyboard instrument such as an electronic piano.

[0002]

2. Description of the Related Art Arms such as electronic pianos are provided with a certain width on both sides of a musical instrument main body from the viewpoint of decorating the musical instrument main body. On the other hand, a black plaque is provided inside the arm to emphasize the keyboard. Conventionally, as such a musical instrument for a keyboard instrument, for example, Japanese Utility Model Laid-Open No. 3-8390
The one described in Japanese Patent Application Laid-Open Publication No. H10-260, 1993 is known. The brace described in this publication is entirely formed of the same material such as plastic, and has a brace outer plate forming an upper surface, an outer surface, and front and rear surfaces, a brace inner plate forming an inner surface on a keyboard side, and a keyboard. And a decorative plate for decorating the decorative plate so as to be in contact with the armature, and the inner arm plate and the decorative plate are formed integrally. The arm plate inner plate with the decorative plate is fixed to the arm plate outer plate with screws via a plurality of bosses protruding from the inner surface of the arm plate outer plate.

[0003]

In such a conventional arm bar, the weight of the arm bar itself is weighed, but a person can put his hand or put an object on this portion, so that it can withstand a considerable load. Must be designed. On the other hand, since this portion is an extremely important element in the decoration of the electronic piano, it is necessary to make the decoration excellent. That is, it is necessary for the crosspiece to have both the decorative function and the strength function. However, since the above-mentioned conventional arm is composed of the arm material outer plate and the arm member inner plate of the same material, if this material is configured with priority on the decorative function, the strength becomes weak, Conversely, if the strength function is prioritized, it will be decoratively inferior. In addition, if the structure is such that both functions are satisfied, there is a problem that the degree of freedom in selecting a material is narrowed and the cost is greatly increased. Further, when the arm is constructed with priority on the decorative function, the arm inner plate excluding the decorative plate portion is hidden in the instrument main body, so that there is a problem that this portion is wasted in terms of cost. .

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a keyboard instrument sword having both a decorative function and a strength function while maintaining low cost. And

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a keyboard musical instrument arm comprising both sides of a musical instrument body with a keyboard interposed therebetween, the outer arm comprising an outer side surface.
A board, an armboard inner board that is formed separately from the armboard outer board, and forms an inner surface on the keyboard side, and is hidden between the armboard outer board and the armboard inner board.
And a reinforcing plate for reinforcing the arm bar outer plate and the arm bar inner plate . The reinforcing plate is formed in a shape complementary to the inner surface of the arm bar outer plate.
And is attached to a brace outer panel .

[0006]

[Function] If the crosspiece is composed of a separate crosspiece, a crosspiece and a reinforcing plate, the decorative function is given priority to the crosspiece and the crosspiece, and the strength function is given priority to the reinforcement plate. Thus, the arm can have both the decorative function and the strength function as a whole. In this case, there is no need to add a strength function to the outer arm plate and the inner arm plate, and it is not necessary to add a decorative function to the reinforcing plate. Also, the reinforcing plate
Hidden between the outer armboard and inner armboard and exposed to the outside
Is not required, regardless of the appearance quality of the reinforcing plate.
Arms can be constructed without impairing the design. further,
A reinforcing plate is attached to the inner surface of the arm bar outer plate in a complementary shape.
Therefore, the strength of the arm bar outer plate can be particularly increased. Sa
Furthermore, a portion of the inner arm plate that is hidden in the instrument body may be omitted.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electronic piano to which a slide lid structure according to an embodiment of the present invention is applied will be described. FIG. 1 shows an external view of an electronic piano.
It comprises a piano body 2 and both legs 3,3. The piano body 2 is placed on the bottom plate 4 on which the legs 3 and 3 are attached, in the front-rear direction (the player's front is “front” and the front is “rear”
It will be described as. ) Has a keyboard portion 5 and a device portion 6, and a pair of left and right arms 7, 7 on both sides of the keyboard portion 5 and the device portion 6.

The keyboard section 5 comprises a keyboard 8 and a control panel 9 provided so as to cover a rear portion thereof. The control panel 9 is provided with various control switches 10. On the other hand, the device section 6 includes the top plate 11 and the rear plate 1.
2, and an acoustic device or the like is accommodated in an internal space formed between the bottom plate 4 and the acoustic device. A music stand 13 is provided at a front portion of the top surface of the top plate 11. A slit 14 is formed between the upper surface of the control panel 9 and the front end of the top plate 11, and the slide lid 15 can be inserted and removed from the inside of the device unit 6 through the slit 14. . The slide lid 15 is slid in the front-rear direction along the both arms 7, 7 to open and close the upper space of the keyboard portion 5 to cover and protect the keyboard 8.

Next, with reference to FIGS. 2 to 4, the arms will be described in detail. 2 to 4 are a side view, a cross-sectional view, and a longitudinal sectional view, respectively, of the brace seen from the inside. As shown in each of these figures, the crosspiece 7 is composed of a crosspiece outer plate 21, a crosspiece inner plate 22, and a crosspiece reinforcement plate 23.
2 is attached. Arm bar outer plate 21
As shown in FIG. 5, the outer plate 21a, the upper plate 21b,
The lower surface plate 21c, the front surface plate 21d, and the rear surface plate 21e are integrally formed in a substantially U-shaped vertical cross section, and a bulge is provided at a lower portion so as to give a sense of volumism as a whole. The arm brace outer plate 21 is made of a material such as plastic which is decoratively superior, and is fixed from the inside with a screw to the arm brace reinforcement plate 23 provided along the inner surface of the arm brace outer plate 21. For this reason, a plurality of bosses 24 for screwing are formed on each portion of the inner surface of the outer arm plate 21, and a plurality of ribs 25 for reinforcement are formed on the bent portion.

[0010] As shown in FIG.
It is made of a material having excellent strength, such as a steel plate, and is formed so as to cover the entire inner surface of the outer armboard 21 by press molding. A plurality of screw holes 26 for screwing the arm plate outer plate 21 are formed in the arm plate reinforcing plate 23, and an arm 27 for fixing the control panel 9 and a beater 31 described later is provided. Further, two lower flanges 23a, 23a for fixing the arm plate reinforcing plate 23 to the bottom plate 4 are provided at a lower end of the arm plate reinforcing plate 23, and an upper flange 23b for attaching the top plate 11 is provided at the upper end.
And a rear end for attaching the rear plate 12
The rear flanges 23c, 23c, 23c are bent.

As shown in FIG. 7, the brace inner plate 22 is composed of a front half decorative portion 28 and a rear half cover guide portion 29. (See FIG. 2). Boom inner board 22
Is made of a material such as plastic which is decoratively excellent. Among them, the decorative portion 28 is exposed to the outside of the device portion 6, and the lid guide portion 29 is hidden inside the device portion 6. In the decorative portion 28, a clasp 31 is formed so as to protrude along the keyboard 8 at a lower portion, and a front guide groove 32 is immersed at an upper portion. The front guide groove 32 is provided along the outer edge from the front end to the rear end of the decorative portion 28, and the front end of the slide lid 15 is slidably guided at this portion. In this case, the front guide groove 32 extends upward from below at the front end of the decorative portion 28 and extends rearward through the curved portion 32a. For this reason, the front part of the slide lid 15 is once guided upward, then turned slowly and guided rearward. That is, a force for opening the slide lid 15 of the player is naturally applied from the upper side to the rear side.

The lid guide portion 29 is provided with a rack 3 on the upper surface of the lower half.
3, a rear guide groove 34 is formed in the upper half part. The rack 33 and the rear guide groove 34 linearly extend from the front end to the rear end of the lid guide portion 29, and the rear end of the slide lid 15 is slidably guided at this portion. ing. That is, the slide lid 1
5 is guided by the front guide groove 32 and the rear guide groove 34 and slides between a closed position where it is drawn forward and covers the keyboard 8 and an open position where it is pushed backward and accommodated in the device unit 6. Be moved.

As shown in FIG. 8, the slide cover 15 includes a cover main body 41, and a front frame plate 42 and a rear frame plate 43 attached to the front and rear ends of the cover main body 41, respectively. The plate 42 and the rear frame plate 43 are inserted, and the lid body 41 is inserted.
Has been reinforced. The front frame plate 42 is made of, for example, a material such as plastic that is decoratively excellent and formed by extrusion or the like. The front frame plate 42 is fixed to the lid main body 41 by screws, a handle-shaped hand-pulling portion 42b, And a bar holding portion 42c to which the guide bar 44 is attached. The front guide bar 44 has both ends slightly protruding from the front frame plate 42, and as shown in FIG.
5 are configured. That is, the front guide projection 45
Slidably engages with the front guide groove 32 of the inner arm plate 22 to guide the slide of the front portion of the slide lid 15.

The rear frame plate 43 includes a decorative plate 46 on the front side and a first fixing plate 4 for attaching the decorative plate 46 to the lid body 41.
7 and a second fixing plate 48, and a slide mechanism 49 is attached to a rear end thereof. The plaque 46 is made of a material such as plastic which is decoratively excellent and formed by, for example, extrusion molding, has a somewhat curved shape upward, and the control panel is provided when the slide lid 15 is in the closed position. The slit 14 between the top 9 and the top 11 is closed. Also, decorative plate 4
Reference numeral 6 denotes a state where the front end is in contact with the lid main body 41, and is screwed to the first fixing plate 47 at a portion of a rib 46a protruding from the lower surface thereof. The first and second fixing plates 47 and 48 are made of a material having excellent strength such as a steel plate, and sandwich the lid main body 41 between the first fixing plate 47 on the back side and the second fixing plate 48 on the front side. As such, it is attached to it.

The slide mechanism 49 includes a pinion 50 that meshes with the rack 33, a rear guide bar 51 that is a support shaft of the pinion 50, and a holder 5 that holds the rear guide bar 51.
2 and a mounting plate 53 for mounting the holder 52 to the rear frame plate 43. The mounting plate 53 is fastened together with the first fixing plate 47 to the lid main body 41. As shown in FIG. 10, both ends of the rear guide bar 51 slightly protrude from the pinion 50, and a plastic cap is attached to the protruding portion to form a rear guide projection 54. That is, the rear guide projection 54 is slidably engaged with the rear guide groove 34 of the inner arm plate 22 to guide the rear slide of the slide cover 15.

As described above, in the arm member 7 of the present embodiment, the arm member outer plate 21 and the arm member inner plate 22 which can be seen from the outside are made of a material giving priority to a decorative function, and the reinforcing plate 23 which cannot be seen from the outside.
Is made of a material that gives priority to its strength function,
The brace 7 can naturally have both the decorative function and the strength function. In addition, the arm plate outer plate 21 and the arm plate inner plate 2
Since the second plate 2 and the reinforcing plate 23 are formed separately, it is possible to widen the scope of selection of each material, to simplify the shape of each, and to reduce the cost as a whole.

[0017]

[Effect of the Invention] As described above, according to the arm of the present invention, a reinforcing plate is provided between the outer arm plate and the inner arm plate to form a sandwich structure. Can also be provided. In addition, since the outer arm plate, the inner arm plate, and the reinforcing plate are separate bodies, there is more room for selection of each material and shape, and overall cost can be reduced. Moreover, of the inner armboard,
Since the portion hidden in the instrument main body can be omitted, it is possible to reduce the weight and improve the space efficiency as well as the cost.

[Brief description of the drawings]

FIG. 1 is an external view of an electronic piano according to an embodiment.

FIG. 2 is a side view of the arm seen from the inside.

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a vertical sectional view of FIG. 2;

FIG. 5 is a side view of the arm bar outer panel.

FIG. 6 is a side view of a reinforcing plate for a crosspiece.

FIG. 7 is a side view of an inner board of a brace.

FIG. 8 is a cut side view of the slide lid.

FIG. 9 is a side view of a guide portion at a front portion of the slide lid.

FIG. 10 is a side view of a guide portion at the rear of the slide lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electronic piano 2 Piano main body 6 Device part 7 Arms 8 Keyboard 21 Arms outer plate 22 Arms inner plate 23 Reinforcement plate for arms

Claims (1)

(57) [Scope of request for utility model registration] 1. An outer side surface of a keyboard musical instrument arm that constitutes both sides of a musical instrument body with a keyboard interposed therebetween.
A brace outer plate, a brace inner plate formed separately from the brace outer plate and constituting an inner surface on the keyboard side, and concealed between the brace outer plate and the brace inner plate; A reinforcing plate for reinforcing the inner board of the brace , wherein the reinforcing plate is
While being formed in a shape complementary to the inner surface of the wooden outer panel,
A arm for a keyboard instrument, which is attached to an arm plate .