JPH03269574A - Top plate attaching structure for keyboard musical instrument - Google Patents

Abstract

PURPOSE:To facilitate the operation of fixing a top plate in the closed state by fixing the bottom parts of a pair of stays to the respective stay fixing parts in the bottom part of a main body case while the top plate is closed. CONSTITUTION:At the time of closing the top plate 4, the bottom edge of a stay 10 is inserted into a guiding groove 7a and turned in a C direction. Then, the front edge part of the stay 10 is lowered along the inclined surface of the guiding groove 7a and guided to the guiding groove 9a of a side plate 9. When the top plate 4 is completely closed, the bottom edge part of the stay 10 is abutted on a bracket 12 and a male screw hole 10a comes to a position almost coincident with a through hole 12a. Then, a bolt 14 is inserted into the through hole 12a from the bottom side of a bracket 12, screwed into the male hole 10a of the stay 10 and fixed to the bracket 12, whereby th top plate 4 can be fixed to a case main body 1 through the stay 10. Thus, the operation of fixing a top plate to the state to be closed can be facilitated.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a top plate mounting structure for a keyboard instrument that can be applied to an electronic keyboard instrument such as an electronic organ or an electronic piano, or to a main body case of an organ or piano. .

[Summary of the invention]

This invention applies to the bottom surface of a top plate that is attached to the top of a main body case so as to be openable and closable in a keyboard instrument.

By rotatably attaching the upper end of the stay that is long enough to reach the bottom of the main case when the top plate is closed, and providing a stay fixing part that fixes the lower end of the stay to the bottom of the main case, This makes it easier to fix the top plate in a closed position.

Also, by providing a stay fixing part on the top of the main body case to fix the lower end of the stay.

It also becomes easier to fix the top plate in an open state.

[Conventional technology]

In recent years, electronic keyboard instruments have tended to become thinner. For example, as shown in FIGS. 6 and 7, the main body case 1 consists of an upper case 1A and a lower case IB, and the lower case 1B has keys 1.
There is one in which the i12 is attached and a speaker grill 3 is provided on the upper case 1A, and a speaker is built in there.

A top plate 4 is attached to the upper part of the upper case 1A with its rear end hinged by a hinge 5 so as to be openable and closable, and screw fastening fittings 6 are attached to both sides of the top plate 4.

In order to fix the top plate 4 in a closed state, a long bolt 8 is inserted from the bottom of the main case 1 along a guide groove 7a formed inside the side plate 7, and its tip is connected to a screw fastening fitting 6. It was fastened by screwing it into place.

[Problem to be solved by the invention]

However, in such a conventional top plate mounting structure of an electronic keyboard instrument, the distance between the insertion end of the bolt 8 and its fastening part is long, so it is difficult to accurately align the tip of the bolt 8 with the screw hole of the screw fastening fitting 6. 1. Workability was poor.

Further, since the top plate 4 cannot be fixed in an open state, there is a problem that the top plate 4 may be closed inadvertently during internal inspection or repair.

The present invention has been made in view of such conventional problems, and a first object thereof is to facilitate the work of fixing the top plate of the main body case of a keyboard instrument in a closed state.

A second purpose is to enable the top plate to be fixed even when it is open.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention provides an upper end of a stay that is long enough to reach the lower part of the main body case when the top plate is closed, on the lower surface of both sides of the top plate that is attached to the upper part of the main body case so as to be openable and closable. To provide a top plate mounting structure for a keyboard instrument, in which a stay fixing part is rotatably attached and a stay fixing part fixing a lower end part of the stay to a lower part of a main body case.

Furthermore, a stay fixing part is provided on the upper part of the main body case for fixing the lower end of the stay when the top plate is open.

(Function) According to the top plate mounting structure of a keyboard instrument configured in this way,
When the top plate is closed, the lower ends of the stays, whose upper ends are rotatably attached to the lower surfaces of both sides, reach the lower part of the main case, so they can be easily fixed with screws, etc. to the stay fixing parts provided there. Can be fixed.

Further, if a stay fixing part is provided at the upper part of the main body case, by opening the top plate and fixing the lower end of the stay to the stay fixing part, the top plate will be fixed in the open state.

〔Example〕

Embodiments of the present invention will be specifically described below with reference to the drawings.

Fig. 1 is a sectional view taken along the inner surface of the left side panel showing the structure for mounting the top plate of an electronic keyboard instrument according to an embodiment of the present invention, and Figs. 2 and 3 respectively show the case where the top plate of the electronic keyboard instrument is closed. It is a perspective view which shows a part of external appearance of a state and an open state.

In these figures, the same parts as in the conventional example shown in FIGS. 6 and 7 are given the same reference numerals.

The top plate 4 of this embodiment has a double structure consisting of a first top plate 4A on the upper side and a second top plate 4B arranged in parallel with each other at intervals below the first top plate 4A. A pair of closed speaker boxes are formed in which speakers (not shown) are installed.

Then, brackets 11 are fixed to the lower surface of the left and right sides of the first top plate 4A, and the top plate 4A is fixed as shown by solid lines in FIG.
The upper end of the stay 10, which is long enough to reach the lower part of the main body case 1 in the closed state, is rotatably supported and attached.

Each side plate 7 of the upper and lower cases IA and IB of the main body case 1
, 9 are provided with guide grooves 7a, 9 for guiding the stay 10.
A bracket 12 having a through hole 12a is fixed as a first stay fixing part for fixing the lower end of the stay 10 at a position corresponding to the lower end of the guide groove 9a of the lower case IB.

Further, a recess 7b is formed in the rear part of the upper end surface of the side plate 7, and a stay fixing metal fitting 13 having a notch 13a as shown in FIG. 4 is fixedly provided on the side surface of the recess 7b as a second stay fixing part.

On the other hand, a female screw hole 10a is formed at the lower end of the stay 10, and an annular groove 10b is formed on the outer periphery slightly above the female screw hole 10a.

According to this embodiment, when closing the top plate 4, the stay 1
0 into the guide groove 7a of the side plate 7, and
When the stay 10 is rotated in the direction of arrow C in FIG. When the top plate 4 is completely closed as shown by the solid line, the lower end of the stay 10 comes into contact with the bracket 12, and its female threaded hole 10a is in a position that substantially coincides with the through hole 12a.

Therefore, a short bolt 14 is inserted into the through hole 12a from the bottom side of the bracket 12, and the female threaded hole of the stay 10 is
0a, it is fixed to the bracket 12, and the top plate 4 can be fixed to the case body 1 via the stay 10.

In this case, the distance between the insertion part of the bolt 14 and the fastening part is extremely short, making it easy to work.

FIG. 2 shows the appearance of the top plate 4 closed and fixed in this manner.

Also, from this state, loosen the bolt 14 and remove the bracket 12.
When the stay 10 is unfastened and the front side of the top plate 4 is lifted, the top plate 4 rotates in the direction opposite to the arrow C in FIG. Groove 9. ，
Nuki comes out from 7a.

After the stay 10 has completely come out of the guide groove 7a, as shown in FIG. When the annular groove 10b is fitted, the lower end of the stay 10 is fixed there, and the top plate 4 is also fixed opened at a predetermined angle as shown by the imaginary line in FIG. It won't fall down.

Therefore, it becomes easier to perform internal inspection and repair work.

In this embodiment, a female threaded hole is formed at the lower end of the stay 10 to be tightened with a bolt, but a bolt-shaped male thread is formed at the lower end of the stay and tightened with a nut. Good too.

Furthermore, the means of fixing the stay at the bottom of the main body case is not limited to screws, but also spring types and metal fittings.

Various fixing means, such as a clip type, can be employed.

Also, the means for fixing the stay at the top of the main body case is not limited to the one in this example, and may include clip type, screw type, etc.
Various fixing means can be employed.

The top plate mounting structure according to the present invention is applicable not only to electronic keyboard instruments but also to body cases of keyboard instruments such as organs and pianos.

[Effects of the Invention] As explained above, if the top plate mounting structure of a keyboard instrument according to the present invention is adopted, when the top plate is closed, the lower ends of the pair of stays can be fixed to the lower part of the main body case. By fixing it to the part, it can be easily fixed with good workability.

In addition, if a stay fixing part is provided at the top of the main body case,
Even when the top plate is open, it can be easily fixed and held by fixing the lower end of the stay to the stay fixing part.

[Brief explanation of drawings]

Fig. 1 is a sectional view taken along the inner surface of the left side panel showing the structure for mounting the top plate of an electronic keyboard instrument according to an embodiment of the present invention, and Figs. 2 and 3 respectively show the case where the top plate of the electronic keyboard instrument is closed. FIG. 4 is a perspective view of the stay fixing fitting 13 in FIG. 1; FIG. 5 is a state in which the lower end of the stay 10 is fixed by the stay fixing fitting 13. FIG. 6 and FIG. 7 are perspective views corresponding to FIGS. 2 and 3 of a conventional electronic keyboard instrument, respectively.
...Lower case 2...Keyboard 4...Top plate
4A... First top plate 4B... Second top plate 7, 9... Side plates 7a, 9a... Guide groove 10... Stay 10a... Female screw hole
10b... Annular groove 12... Bracket (first stay fixing part) 3... Stay fixing metal fitting (second stay fixing part) 14... Bolt

Claims (1)

[Scope of Claims] 1. The top end of the stay, which has a length that reaches the bottom of the main body case when the top plate is closed, is mounted on the lower surface of both sides of a top plate that is attached to the upper part of the main body case so as to be openable and closable. A structure for mounting a top plate of a keyboard instrument, characterized in that the stay is movably mounted and a stay fixing part for fixing a lower end of the stay is provided in a lower part of the main body case. 2. The top plate mounting structure for a keyboard instrument according to claim 1, further comprising a stay fixing part for fixing the lower end of the stay when the top plate is open, on the upper part of the main body case.