JPH10207448A - Sliding lid opening and closing device for piano - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the sliding lid opening and closing device which improves a quality feeling when a sliding lid is opened, generates neither loud noise nor vibration even when the sliding lid is fully opened powerfully, and prevents play at the time of transportation in the fully open state. SOLUTION: The sliding lid opening and closing device for a keyboard musical instrument which is provided with a rotary shaft 3, having pinions 4 fixed at both ends, at the rear part of the sliding lid 1 covering a keyboard and with racks 9 and guide grooves 10 inside a couple of right and left side plates 8 of a musical instrument case and has the couple of pinions 4 engaged with the couple of racks 9 and pinion guides 5, provided outside the couple of pinions 4, fitted in the couple of guide grooves 10 is provided with a leaf spring 12, which presses the pinion guides 5 when the sliding lid 1 approaches the fully open position and has recessed parts 11 wherein the pinion guides 5 are fitted at the fully open position, in the guide grooves 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide lid opening and closing device for a keyboard instrument such as an electronic piano.

[0002]

2. Description of the Related Art Conventionally, as a slide lid opening / closing device for a keyboard instrument such as an electronic piano, a rotary shaft having pinions fixed to both ends is provided at a rear portion of a slide lid for covering a keyboard, and the inside of a pair of left and right side plates of a musical instrument case. Are respectively provided with a rack and a pinion guide groove, the pair of pinions are respectively engaged with the pair of racks, and the pinion guides respectively provided outside the pair of pinions are fitted into the pair of pinion guide grooves, respectively. Things have been suggested.

[0003]

The above-mentioned conventional slide lid opening and closing device for a keyboard instrument does not have a stopper mechanism or a deceleration mechanism when the slide lid is opened, so that severe noise and vibration occur when the slide lid is fully opened. In addition, there is a problem in that there is no texture when the slide lid is opened, and there is rattling during transportation in a fully opened state.

The present invention solves the above-mentioned problems of the conventional slide lid opening / closing device for a keyboard instrument, improves the texture when the slide lid is opened, and does not generate severe noise or vibration even when the slide lid is fully opened. It is another object of the present invention to provide a slide lid opening / closing device that prevents rattling during transportation in a fully opened state.

[0005]

According to the present invention, in order to solve the above-mentioned problems, a rotary shaft having pinions fixed to both ends is provided at a rear portion of a slide cover for covering a keyboard. A rack and a guide groove are respectively provided inside a pair of left and right side plates of the musical instrument case, the pair of pinions are engaged with the pair of racks, respectively, and pinion guides respectively provided outside the pair of pinions are provided by the pair of pinions. In the slide lid opening / closing device for a keyboard instrument fitted in each of the guide grooves, a recess in which the pinion guide is pressed when the slide lid approaches the fully opened position and the pinion guide is fitted in the fully opened position is provided in the guide groove. And a pinion at both ends at a rear portion of the slide lid that covers the keyboard, as described in claim 2. Is provided, a rack and a guide groove are respectively provided inside a pair of left and right side plates of the musical instrument case, the pair of pinions are respectively engaged with the pair of racks, and provided outside the pair of pinions, respectively. In a sliding lid opening and closing device for a keyboard instrument in which the pinion guides are fitted in the pair of guide grooves, the pinion guide is made of a magnet or a magnetic material,
A magnetic member or a magnet is provided in the guide groove, and a brake is applied to the slide lid when the slide lid approaches a fully open position due to a magnetic attraction force of the magnet against a pinion guide made of a magnetic member or a magnetic material. The lid is stopped.

When the slide lid is opened to approach the fully open position, the pinion guide is pressed by a leaf spring provided in the guide groove to apply a brake to the movement of the slide lid. According to the configuration of 2,
The brake is applied to the slide lid by the magnetic attraction of the magnet that is the pinion guide or the magnet provided in the pinion guide groove, so that the texture of the slide lid improves. It does not emit impact noise due to violent collision with the end. Further, according to the configuration of claim 1, when the slide lid is in the fully open position, the pinion guide fits into the recess of the leaf spring. Therefore, according to the configuration of claim 2, the pinion guide is provided in the magnet or the guide groove of the pinion guide. Because the pinion is stopped by the magnetic attraction of the magnet, even if the slide lid is fully opened vigorously, it stops without generating an impact sound,
The slide lid does not rattle.

[0007]

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

FIGS. 1, 2 and 3 show a left-side configuration of a slide lid opening / closing apparatus according to an embodiment of the present invention applied to an electronic piano.

In FIG. 1, reference numeral 1 denotes a slide lid, and at the rear of the slide lid 1, a rotating shaft 3 is supported by a pair of holders 2 (only one is shown), and pinions 4 are fixed to both ends. A cylindrical pinion guide 5 is provided outside the pinion 4. 6 is an instrument case 7
Of the slide lid 1 screwed to the inner surfaces of the left and right side plates 8 respectively.
And a guide groove 10 into which the pinion guide 5 is fitted. These are integrally formed. When the slide lid 1 is closed as shown in FIG. 1, the pinion guide 5 (FIG. 3) fixed to the rotating shaft 3 is shown by an imaginary line at the front end of the guide groove 9 (the left end of FIG. 3B). 2), and when the slide lid 1 is in the fully open position as shown in FIG. 2, the pinion guide 5 moves to the position of the rear end (the right end in FIG. 3) of the guide groove 10. During this movement, the pinion 4 rotates while engaging with the rack 9. The configuration on the right side of the slide lid opening and closing device is the same as the configuration on the left side.
Further, the guide member 6 may be formed integrally with a part of the side plate 8 of the musical instrument case 7.

The above configuration and operation are not particularly different from those previously proposed.

As shown in FIG. 3, a leaf spring 12 having a concave portion 11 at an intermediate portion is fixed to a rear end portion in the guide groove 10 of the guide member 6, and the flat plate portion 13 has a pinion below it. When the guide 5 arrives, the pinion guide 5 is pressed against and acts to hinder the movement of the pinion guide 5 to the rear of the guide groove 10, and the recess 11 engages the pinion guide 5 to move the slide lid 1 to the open position. It is designed to stop.

According to the above configuration, the slide lid 1 is
When the pinion 4 is moved from the closed state as shown in FIG. 2 to the fully opened state as shown in FIG. 2, the pinion 4 is guided by the fitting of the pinion guide 5 into the guide groove 10 and the front end of the rack 9 (the left end in FIG. When the pinion guide 5 moves below the flat plate portion 13 of the leaf spring 12 when the pinion guide 5 moves below the flat portion 13 of the leaf spring 12 while rotating toward the rear end from the position), the pinion guide 5 is pressed by the spring force of the leaf spring 12. The brake is applied to the rotation of the pinion 4 and the opening speed of the slide lid 1 decreases. Therefore, a texture is given to the hand that opens the slide lid 1, and even if the slide lid 1 is fully opened, the pinion guide 5 is not
And the pinion 4 stops, and the slide lid 1
Stops at the fully open position, so that the pinion guide 5 is prevented from colliding with the rear edge of the guide groove 10 and does not emit a collision sound. In this stop position, the slide lid 1
No rattling occurs.

FIG. 4 shows a main part of another embodiment of the present invention.

In FIG. ₁ , reference numeral 51 denotes a cylindrical pinion guide formed of a magnet, which is provided outside the pinion 4, and 14 is a magnetic member made of, for example, an iron plate. The magnetic member 14, the rear portion of the guide groove 10 of the guide member 6, opposite to the magnetic attraction force is fixed so as to act on the outer end surface of the pinion guide 5 ₁ positioned in the rear part. Other configurations are the same as those explicitly shown in FIG.

According to the above configuration, the slide lid 1 is
When moving to a fully open state as shown in FIG. 2 from the closed state as shown in, the pinion 4 is a rear end portion is guided by engagement of the pinion guide 5 _first guide groove 10 from the front end of the rack 9 Go while rotating toward the open speed of the brake is consuming slide cover 1 in its rotation by the sliding lid 1 approaches the fully open position the magnetic attraction force of the pinion guide 5 ₁ is lowered, and stopped. Therefore, a texture is given to the hand that opens the slide lid 1 and the slide lid 1 is vigorously given.
Pinion guide 5 ₁ be fully opened is prevented from colliding vigorously in the guide groove 10, does not generate impact noise. In this stop position, the slide lid 1 does not rattle. In the example of FIG. 4, the pinion guide 5 ₁
Can be replaced by a magnetic material, and the magnetic member 14 can be replaced by a magnet.

[0016]

According to the present invention, the texture when the slide lid is opened is improved, and no harsh noise or vibration is produced even when the slide lid is fully opened. This has the effect that sticking can be prevented.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a slide lid opening / closing device for a keyboard instrument according to an embodiment of the present invention, showing a state in which the slide lid is closed.

FIG. 2 is a side sectional view of the slide lid opening and closing device of the keyboard instrument according to the embodiment of the present invention, showing a state where the slide lid is opened.

FIGS. 3A and 3B are an exploded perspective view of a part of the slide lid opening and closing device according to the present invention and an enlarged side view of a main part of the slide lid opening and closing device.

FIG. 4 is an exploded perspective view of a main part of the slide lid opening / closing device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sliding lid 3 ... Rotation axis 4 ... Pinion 5, 5 ₁ ... Pinion guide 6 ... Guide member 7 ... Musical instrument case 8 ... Side plate 9 ... Rack 10 ... Guide groove 11 ... Concave 12 ... Leaf spring 13 ... Flat plate 14 ... Magnetic Element

Claims (2)

[Claims] 1. A rear part of a slide cover for covering a keyboard is provided with a rotating shaft having pinions fixed to both ends thereof, and a rack and a guide groove are provided inside a pair of left and right side plates of a musical instrument case, respectively. In the slide lid opening and closing device for a keyboard instrument in which a pair of pinions are respectively engaged with the pair of racks and pinion guides respectively provided outside the pair of pinions are fitted into the pair of guide grooves, a slide lid is provided in the guide groove. A sliding lid opening / closing device for a keyboard instrument, comprising: a leaf spring having a concave portion for pressing the pinion guide when approaching the fully open position and fitting the pinion guide at the fully open position. 2. A rear part of a slide lid for covering a keyboard is provided with a rotating shaft having pinions fixed to both ends thereof, and a rack and a guide groove are provided inside a pair of left and right side plates of a musical instrument case, respectively. In the slide lid opening and closing device for a keyboard instrument, each of which engages with the pair of racks, and a pinion guide provided on the outside of the pair of pinions is fitted into each of the pair of guide grooves, the pinion guide is made of a magnet or a magnetic material. A magnetic member or a magnet is provided in the guide groove, and when the slide lid approaches the fully open position by magnetic attraction to the pinion guide made of the magnetic member or the magnetic material of the magnet, a brake is applied to the slide lid, and the slide lid is fully opened. The slide of the keyboard instrument, wherein the slide lid is stopped at the position. Id lid opening and closing device.