JPS6321009Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a foot key device for an electronic keyboard instrument such as an electronic organ.

Generally, the foot keyboard of an electronic organ is arranged at the bottom of the main body of the electronic organ, and each foot key A that makes up the foot keyboard has a metal key arm B and a resin cover C covering the front half thereof, as shown in Fig. 1. It is attached via a spring to a chassis D fixed to the organ body.

However, in the conventional foot key A, as shown in FIG.
Convex parts G, G facing the concave parts F, F are formed on the bottom back surface of the cover C, with female screws H, H being threaded in the center thereof, and a through hole is inserted into the female screws H, H from the back side of the key arm B. Screw in the male screws K and K that pass through E,
The key arm B and the cover C are fixed together, and the male screw K is an essential part, which has the disadvantage that the number of parts increases and the number of man-hours must also be taken into consideration.

Therefore, the present invention is provided with the aim of eliminating the above-mentioned disadvantages, and consists of a metal key arm 1 with a U-shaped cross section that opens downward, and a resin cover 2 with a similar cross section that covers the front half of the metal key arm 1. foot key 3
In an electronic keyboard instrument equipped with a plurality of cover 2
The key arm 1 is provided with a convex portion 4 and an elastic hook-shaped projection 5 on the bottom inner wall on the tip side, and a protruding member 6 extending from the lower side of the root portion thereof. A recess 7 at a position opposite to the convex part 4 on the bottom part of the tip side and engaged with the convex part 4, and a first protrusion 8 at a position opposite to the hook-shaped protrusion 5 and engaged with it.
, and a second projecting piece 9 that engages with the projecting member 6 is provided at a position opposite to the projecting member 6.

In FIG. 3, the convex part 4 of the cover 2 is made of an elastic material and is formed into a cylindrical shape with slits at several places in the vertical direction, and the protruding member 6 is cut out above the side of the base of the cover 2, and formed by the remaining portion below. Further, the recessed portion 7 of the key arm 1 is formed by burring from the bottom outer wall side of the arm, and has a cylindrical convex portion on the bottom inner wall side, and the first protruding piece 8 and the second protruding piece 9 are respectively formed on the bottom side. Or 3 on the side
A free piece with notched sides is formed by cutting and raising it on the inner wall side of the bottom part or the outer wall side of the side part.

To assemble the foot key 3 of the present invention, a resin cover 2 is wrapped around the key arm 1 from the direction of the arrow, and the cylindrical protrusion 4 of the cover 2 is compressed by the inner wall of the cylindrical protrusion of the arm 1. 2, the hook-shaped protrusion 5 of the cover 2 is fitted into the recess 7 of the key arm 1, and the hook-shaped protrusion 5 of the cover 2
While the hook portion is pushed toward the convex portion 4 side, it is engaged with the first cut and raised piece 8 of the key arm 1, and the protruding member 6 of the cover 2 is pushed outward by the second cut and raised piece 9 of the key arm 1. While being pushed apart, it is engaged with the second cut and raised piece 9 of the key arm 1, and the process is completed as shown in FIG. Here, the projecting member 6
The upper part of the upper part and the second cut-and-raised piece 9 are shown in FIG.
As shown in FIG. 6, it is provided to be inclined diagonally downward, and as shown in FIG. The hook-shaped projection 5 and the first projection piece 8 are engaged with each other by the cover 2.
It plays a role in preventing upward separation.

As described above, according to the present invention, the convex portion 4, the hook-shaped protrusion 5, or the protruding member 6 is provided at the position facing the recessed portion 7, the first protruding piece 8, and the second protruding piece 9 of the key arm 1, respectively. Since the cover 2 that covers the front half of the arm 1 is prepared and the foot lock 3 is formed by fitting or engaging them, there is no need to screw the key arm and the cover together as in the conventional foot lock. , it is easy to assemble, and has the effect of reducing the number of parts and assembly man-hours.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view of a general foot keyboard, Fig. 2 is a cutaway side view illustrating the assembled state of a conventional foot key device, Fig. 3 is an exploded perspective view of the foot key device of the present invention, and Fig. 4 5 is a cutaway front view of the cover and key arm of the present invention, FIG. 5 is a cutaway side view of the foot lock device of the present invention, and FIG. 6 is a cutaway front view thereof. 1...key arm, 2...cover, 3...foot key,
4...Convex portion, 5...Uncinate process, 6...Protruding member,
7... recess, 8... first protruding piece, 9... second protruding piece.

Claims (1)

[Scope of utility model registration request] Metal key arm 1 with a U-shaped cross section that opens downward
and a resin cover 2 having a similar cross-section covering the front half of the foot keys 3. A hook-shaped protrusion 5 is provided, and a protruding member 6 is provided below the side of the root thereof, extending from the hook-shaped protrusion 5. A recess 7 that fits therein, a first protrusion 8 that engages with the hook-shaped protrusion 5 at a position facing it, and a second protrusion 9 that engages with the protrusion 6 at a position opposite the protrusion 6.
A foot key device for an electronic keyboard instrument comprising: