JPS5848710Y2 - Keyboard lid sliding mechanism - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a keyboard lid sliding mechanism for sliding and storing the keyboard lid of a keyboard instrument into the instrument body.

Conventionally, for example, on a piano, the keyboard lid that covers the keyboard has been rotatably attached to the instrument body via a hinge, and when the keyboard lid is open, it is forced to stand up almost vertically. ing.

However, with a keyboard configured in this way,
Since there is no special means for holding the keyboard lid open, users may accidentally touch the open keyboard lid or roughly flip over the music sheets on the music stand provided inside the keyboard lid. If this occurs, the keyboard lid may close automatically due to its weight, and at that time, your hands or fingers may be caught between the keyboard lid and the bottom groove, or the keyboard lid may come into contact with the bottom bar. There was a risk of making a loud noise or damaging these items.

To solve this problem, a keyboard lid opening/closing mechanism has been proposed in which the keyboard lid can be slid into the main body of the musical instrument and stored.

An example of this will be explained with reference to FIG.

In other words, the arms 1 are located opposite to each other on the left and right, the shelf 2 is provided between them, and the arm 1 is located at the upper end of the shelf 2.
The lower mouth bar 3 etc. provided in between constitute the main body of the musical instrument, and a large number of keys 4 constituting the keyboard arranged on the shelf board 2.
is capable of see-saw operation using a floating shaft 5 provided at the lower central portion as a fulcrum, and when the key portion 6 is pressed, the rear end portion rises and the corresponding action mechanism (Fig. (not shown).

The keyboard cover 7, whose distal end contacts the upper surface of the lower opening bar 3 and covers the key 4 when it is in the closed state, has guide rods 8 on both sides of its inner surface, and is attached to the distal end thereof. The guide pin 9 is in sliding contact with a guide groove 11 formed in the back circle 10 diagonally toward the rear of the instrument body.

Note that 12 in the figure is a second shelf board constituting the main body of the musical instrument, and a music stand 13 is placed on it.

Therefore, when opening the keyboard lid 7, lift the keyboard lid 7 a little and then press it.
1 and is stored inside the instrument body.

By the way, in a keyboard instrument, the keys 4, action mechanism, etc. may be adjusted after the instrument is assembled, but in such a case, it is necessary to remove the keyboard lid 7 from the instrument body.

However, in the keyboard lid 7 configured as described above,
Since the guide pin 9 cannot be removed from the guide rod 8, in order to remove the keyboard lid 7 from the instrument body, remove the wood screw S that secures the guide rod 8 to the keyboard lid 7. must be taken out.

As described above, with the opening/closing mechanism of the keyboard lid in conventional keyboard instruments, it is troublesome to remove the keyboard lid 7 from the instrument body, and if the keyboard lid 7 is removed frequently, the wood screws S become loose, making it difficult to open and close the keyboard lid 7. I was used to getting in trouble.

Furthermore, the left and right guide rods 8 and guide pins 9 are
They are each provided independently, and there is no means for relating and interlocking them, so when opening and closing the keyboard lid 7, you must apply equal force to the left and right sides of the keyboard lid 7.
It did not slide smoothly and was difficult to open and close.

This invention was made in view of the above circumstances, and the purpose is to provide a keyboard lid sliding mechanism that allows the keyboard lid to be easily attached to and removed from the instrument body and allows for smooth opening and closing operations. , a slide pin that moves within the guide groove is removably attached to a rotating bracket fixed to the keyboard lid, and a U-shaped rotating bracket rod is rotatably attached to a predetermined position inside the chestnut body; The slide pins and the rotating metal fittings are connected to each other by connecting plates pivotally attached to the left and right ends of the slide pins and the rotating metal fittings.

An embodiment of this invention will be described below with reference to the drawings.

In FIG. 2, a shelf board 21 is installed between arms 20 that face each other on the left and right sides of the instrument body and protrude forward, and a large number of keys 23 are arranged on the upper surface of the shelf board 21, which see-saw with the bamboo blind 22 as a fulcrum. The upper surface of each key 23 is placed on each armrest 2 to prevent it from jumping up.
The key part 23 a comes into contact with the keyboard holder 24 installed between 0 and 0.
When pressed, the actuator seesaws and its rear end rises to operate an action mechanism (not shown).

The keyboard lid 25 for covering the above is hollowed out so that when the keyboard lid 25 is in the closed state, the bottom surface of its tip comes into contact with the top surface of the thousand-mouth bar 26 fixed to the top surface of the tip of the shelf board 21. Rotating metal fittings 27 are fixed to both sides of the rear end of the keyboard lid 25, and extend diagonally downward into the main body of the musical instrument.

On the other hand, a sliding plate 29 having a guide groove 28 is fixed to the inner surface of each arm 20, and the tip of the guide groove 28 faces the tip of the rotary fitting 27 inside the instrument body. It extends diagonally upward.

A slide pin 30 movable within the guide groove 28 and a connecting plate 3 are provided at the tip of the rotary fitting 27.
1 is removably pivoted at one end.

That is, as shown in FIGS. 3 and 4, the thumbscrew 32 passing through the rotary fitting 27 is screwed into the thumbscrew collar 33, and one end of the connecting plate 31 is rotatably connected to the thumbscrew collar 33. The slide pin 30 is screwed into the thumb screw 32 which is fitted and further protrudes from the thumb screw collar 33.

Further, below the approximately central portion of the sliding plate 29, the shelf plate 21
A concave groove 34 extending to the left and right arms 20 is formed in the
A U-shaped rotary metal rod 35 whose left and right ends substantially face the sliding plate 29 is disposed within the groove 34 so as to be rotatable about the axis of its intermediate portion. Removal from the groove 34 is prevented by a presser plate 36 that closes the opening.

The other ends of the connecting plates 31 are rotatably connected to the right and left ends of the rotary metal rod 35, thereby connecting the rotary metal fittings 27 and interlocking them. There is.

Note that 37 in the figure is a second shelf board.

However, as is clear from the above configuration, the keyboard lid 25
To open it, lift the tip of the keyboard lid 25 slightly and push it toward the instrument body, and the slide pin 30 will slide within the guide groove 28 and be guided by the guide groove 28, as shown in Fig. 2. It is stored in the position indicated by the line.

In this case, even if the force for pressing the keyboard lid 25 is different on the left and right sides, the rotating metal fittings 27 fixed to both sides of the rear end are connected by the connecting plate 31 and the rotating metal fitting rod 35, so the keyboard lid 25 moves in parallel without swinging left and right, and slides smoothly along the guide groove 28.

In addition, when removing the keyboard lid 25 from the instrument body, if the thumbscrew 32 is removed from the slide pin 30 and the thumbscrew collar 33, the rotary fitting 27, the guide groove 28 and the connecting plate 3 can be removed.
1, the keyboard lid 25 can be easily removed from the instrument body.

In addition, in the above embodiment, the sliding plate 29 having the guide groove 28
are fixed to the inner surface of each arm 20, but this invention is not limited to the above-mentioned arrangement, and a guide groove may be directly carved at a predetermined position on the inner surface of the main body of the musical instrument.

In addition, the slide pin 30 and the connecting plate 31 are connected to the rotary fitting 2.
7 with a thumbscrew 32, this invention is not limited to the above configuration, and the means can be selected as appropriate.
0 and the connecting plate 31 can be attached and detached.

As explained above, according to this invention, the rotating metal fittings fixed to both sides of the rear end of the keyboard lid, the slide pins and the connecting plate that slide in the guide grooves are removably attached to the keyboard, and the action mechanism When adjusting or repairing internal mechanisms, etc., the keyboard cover can be easily removed from the instrument body, making the work easier.

In addition, each rotating fitting is connected by a rotating fitting rod rotatably provided at a predetermined position inside the instrument body and a connecting plate rotatably attached to the left and right ends of the rod. slide along the guide groove in conjunction with each other,
Therefore, even if the forces pushing the keyboard lid into the instrument body are different on the left and right sides, the keyboard lid moves in parallel without swinging from side to side, and slides smoothly along the guide groove.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing the main parts of a conventional keyboard lid opening/closing mechanism, Fig. 2 is a sectional view showing the main parts of an embodiment of this invention, and Fig. 3 is a view taken along the line III-III in Fig. 2. The enlarged sectional view, FIG. 4, is an exploded view showing the components shown in FIG. 3. 23...Key, 25...Keyboard lid, 27.
...Rotating metal fitting, 28...Guide groove, 30
...Slide pin, 31...Connection plate,
35... Rotating metal rod.

Claims (1)

[Scope of utility model registration request] In a keyboard instrument in which the keyboard lid is opened by sliding a keyboard lid for covering the keyboard into the instrument body and storing the keyboard lid, guide grooves are provided at predetermined positions on the inner surface of the instrument body, and the keyboard lid A rotary metal fitting with a tip end extending toward the guide groove is fixed to both sides of the rear end, and a substantially U-shaped rotating metal rod is placed at a predetermined position inside the instrument main body with its intermediate axis centered. At the same time, one end of a connecting plate is rotatably attached to the tip of the rotating metal rod, and a slide pin movable in the guide groove is attached to the tip of the rotating metal rod, and the connecting plate is rotatably attached to the tip of the rotating metal rod. A keyboard lid sliding mechanism that is removably pivoted to the other end.