JP3067194B2 - Keyboard instrument lid opening and closing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard instrument lid opening / closing apparatus for protecting a keyboard of a keyboard instrument.

2. Description of the Related Art In recent years, a cover opening / closing device for a keyboard instrument has been incorporated into the main body of a musical instrument because of its function of merely protecting a keyboard and the like, and is stored in the main body of the musical instrument when playing a musical instrument so that the external appearance is invisible. It has become a sliding type device.

Hereinafter, a conventional lid opening and closing device for a keyboard instrument will be described.

FIG. 9 is a side sectional view showing a conventional lid opening / closing device mounted on an electronic musical instrument main body, and FIG. 10 is a detailed view of FIG.
The figure is a front sectional view thereof. In FIG. 9, reference numeral 1 denotes a side plate of a housing of the electronic musical instrument device. 2 is a hand keyboard, 3 is a roof, 4 is a lid, 5 is a pinion, 6 is a pair of left and right pinions 5
Is a pinion shaft, 7 is a mountain plate, and 8 is a guide. In FIG. 10, reference numeral 9 denotes a rack for slidingly driving the lid 4, and reference numeral 10 denotes a bearing for holding the pinion shaft 6. Reference numeral 11 denotes a decorative bar serving to hide the inside of the housing, and 12 denotes a mounting screw for fixing the bearing 10 to the lid 4. In FIG. 11, reference numeral 5a denotes a projection provided on the pinion 5, and reference numeral 13 denotes a mounting screw for fixing the pinion 5 to the pinion shaft 6.

The operation of the lid opening / closing device for a keyboard instrument configured as described above will be described below.

First, when the player performs, it is necessary to store the lid 4 in the instrument body along the guide 8 by lifting the lid decoration bar 17. Even when the operation is performed, the lid 4 must be securely stored in the specified position. Therefore, the lid opening and closing device,
The lid 4 and a gear device for securely storing the lid 4 are added. The pinion 5 is fixed to a pair of left and right via mounting screws 13 at left and right ends of a pinion shaft 6 rotatably held by a plurality of bearings 10 fixed to the lid 4. In order to prevent the rack 9 provided on the pinion 5 from being disengaged, the projection 5a provided on the pinion 5 is inserted into the guide 8,
When operated with one end of the lid 4, the pinion 5 on the operated side forcibly drives the other pinion 5 via the pinion shaft 6, and the rack 9 provided on the top of the mountain plate 7. And the lid 4 is smoothly slid.

However, in the above-described conventional configuration, the lid is smoothly housed in the instrument body even when operated with one end of the lid, but when viewed from the manufacturer side, the pinion is attached to the guide 8. Since the pinion 5 must be inserted, the cover 4 is assembled into the instrument main body with the pinion 5 shifted inward in advance, and then the pinion 5 is shifted outward to engage with the rack 9 while the pinion 5 is fitted. 5 has to be inserted into the guide 8 and the pinion 5 must be fixed to the pinion shaft 6, which has the disadvantage that the production is troublesome. The present invention solves the above-mentioned conventional problems. When the conventional lid 4 is incorporated in the instrument main body, the operation of moving the pinion 5 is not performed, and the pre-assembled lid main body device is directly incorporated in the instrument main body. It is an object of the present invention to provide a cover opening / closing device for a keyboard instrument that can complete the fitting with the guide 9 and the insertion into the guide 8.

Means for Solving the Problems In order to solve the above-mentioned conventional problems, a lid opening / closing device for a keyboard instrument according to the present invention is provided with a rack on an upper surface, and a pair of left and right mountain plates respectively attached to both inside surfaces of the instrument body. A shaft slidably provided in a rear portion of a slidable keyboard cover that covers an upper portion of a keyboard portion of the musical instrument main body and is rotatably provided in a longitudinal direction;
At both ends of the shaft, a pair of left and right pinions that are fitted to the shaft and mesh with the rack, respectively, and provided on both inside surfaces of the instrument body so that the pinions are slidably fitted to the guides of the mountain plate, respectively. A groove that is deeper than the pinion in a direction perpendicular to the sliding direction of the pinion from the upper end of at least one of the guide grooves,
A protrusion formed at an end of the pinion abuts on the groove, and the keyboard cover is attached to and detached from the musical instrument main body while the pinion is fitted on the shaft.

Operation With this configuration, the lid opening / closing device of the present invention allows the keyboard lid to be freely attached to and detached from the instrument main body only by sliding the shaft without using a tool or the like.

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

FIG. 1 is a side view of a lid opening / closing device mounted on an electronic musical instrument according to a first embodiment of the present invention, and FIG. 2 is a detailed view of the positions of pinions and guide grooves when the lid is mounted. FIG. 3 is a detailed view when the lid is mounted, and FIG. 4 is a detailed sectional view of the pinion and the guide groove when the lid slides. FIG. 5 is a view when the lid is attached, and FIG. 6 is a view in which the lid is completely attached to the musical instrument main body.

In FIG. 1, reference numeral 1 denotes a side plate of a housing of the electronic musical instrument device. 2 is a hand keyboard and 3 is a roof. 4 is a lid, 5 is a pinion, 7 is a mountain plate, and 14 is a guide groove. In FIG. 2, reference numeral 14a denotes a guide groove 14 for temporarily storing the pinion 5.
6 is a pinion shaft connecting the pair of left and right pinions 5, and 10 is a bearing for holding the pinion shaft 6.
Reference numeral denotes a mounting screw for fixing the bearing 10 to the lid 4. In FIG. 3, reference numeral 5a denotes a sliding protrusion integrated with the pinion 5, and reference numeral 13 denotes a mounting screw for fixing the pinion 5 to the pinion shaft 6.

The operation of the lid opening / closing device for a keyboard instrument configured as described above will be described below.

First, at both left and right ends of a pinion shaft 6 rotatably held by a plurality of bearings 10 provided at the rear portion of the lid 4, the pinion 5 is engaged with a rack 9 provided on an upper portion of a mountain plate 7, and Mounting screw 13 so that projection 5a fits into guide groove 14.
Attach with At this time, the bearing 10 is set so that the pinion 5 can move by the length of the projection 5a, and is attached to the lid 4. The lid opening / closing device assembled and set as described above is moved until the pinion 5 comes into contact with the bearing 10 as shown in FIG. 5, and the pinion 5 on the opposite side is inserted into the groove 14a. Incorporated in Groove for sliding lid 4
Insert the protrusion 5a of the pinion 5 not inserted into 14a into the guide groove 1.
By moving the pinion shaft 6 to fit the pinion 4, the left and right pinions 5 automatically mesh with the rack 9,
As shown in FIGS. 4 and 6, the lid 4 is completely assembled into the instrument main body. To remove the lid device from the instrument main body, the reverse operation to the above-described procedure may be performed.

As described above, according to the present embodiment, the pinion 5 provided on the lid 4 can be moved to the left and right, and the pinion 5 on one side is inserted into the groove 14a provided on the inner surface of the side plate 1 of the instrument main body. The attachment and detachment of the lid main body can be made possible without using such as.

Hereinafter, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 7 is a detailed side view of a lid opening / closing device for a keyboard instrument showing a second embodiment of the present invention. In the figure, reference numeral 15 denotes a guide which holds the engagement between the pinion 5 and the rack 9;
Is a pinion groove for accommodating the pinion 5. Other 3
Is a roof, 4 is a lid, 6 is a pinion shaft, 7 is a mountain plate, 10 is a bearing, and 12 is a fixing screw of the bearing 10. FIG. 8 is a detailed sectional view of a lid opening / closing device for a keyboard instrument showing a second embodiment of the present invention.

The operation of the lid opening / closing device for a keyboard instrument configured as described above will be described below.

First, the pinions 5 are fixed to both ends of a pinion shaft 6 rotatably held by a plurality of bearings 10 provided at the rear end of the lid 4. The assembled lid 4 can be incorporated into the instrument body without using tools by dropping the pinion 5 into a pinion groove 16 provided on the inner surface of the side plate 1. When the lid 4 is slid back and forth, the pinion 5
It can be operated in parallel by rolling in the gap set between the guide 4 and the guide 15 and sliding the cover 4 by holding one of the left and right ends. When removing the lid 4 from the electronic musical instrument device, the reverse operation may be performed. As described above, according to the present embodiment, the pinion groove 16, the gear surface of the mountain plate 7, and the gap where the pinion 5 can slide are secured on the inner surface of the side plate of the electronic musical instrument device, and the pinion 5 and the rack are secured. By providing a guide 15 for holding the meshing of No. 9, the same effect as in the first embodiment can be obtained, and the lid 4 can be attached and detached without tools.

Effect of the Invention As described above, the present invention has a shaft provided at the rear part of a keyboard lid, and a pair of pinions provided on the left and right ends of the shaft engage with a rack on a mountain plate provided on the inner surface and slide. In the lid opening and closing device, by providing a guide groove for storing the pinion and a groove for sliding the pinion on the inner surface of the side plate,
An object of the present invention is to realize an excellent lid opening / closing device for a keyboard instrument which can be attached and detached without a tool.

[Brief description of the drawings]

FIG. 1 is a side view showing the mounting of the cover opening / closing device for a keyboard instrument according to the first embodiment of the present invention, FIG. 2 is a detailed side view thereof, and FIG. Sectional view, fourth
The figure is a detailed sectional view during sliding of the lid of the first embodiment of the present invention,
FIG. 5 is a cross-sectional view of the first embodiment of the present invention when the lid is mounted, FIG. 6 is a completed view of the first embodiment of the present invention, and FIG. 7 is a second embodiment of the present invention. 8 is a detailed sectional view of a second embodiment of the present invention, FIG. 9 is a side sectional view of a conventional keyboard instrument lid opening / closing device, and FIG. 10 is a detailed side sectional view of the same. FIG. 11 is a front sectional view of a conventional keyboard instrument lid opening / closing device during sliding of a lid. 5 ... pinion, 6 ... pinion shaft, 7 ... mountain plate, 9 ...
... Rack, 10 ... Bearing, 14 ... Guide groove, 16 ... Pinion groove.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G10B 3/00 G10C 3/02 G10C 3/12 G10H 1/32

Claims (1)

(57) [Claims] A rack is provided on an upper surface, and a pair of left and right mountain plates respectively attached to both inside surfaces of a musical instrument main body, and a slidable rear cover for covering a keyboard portion of the musical instrument main body above a rear portion thereof. A shaft provided to be movable and rotatable in the longitudinal direction,
At both ends of the shaft, a pair of left and right pinions that are fitted to the shaft and mesh with the rack, respectively, and provided on both inside surfaces of the instrument body so that the pinions are slidably fitted to the guides of the mountain plate, respectively. A groove that is deeper than the pinion in a direction perpendicular to the sliding direction of the pinion from the upper end of at least one of the guide grooves,
A lid opening / closing device for a keyboard instrument, wherein a projection formed at an end of the pinion is in contact with the groove, and the keyboard lid is attached to and detached from the instrument body while the pinion is fitted to the shaft.