JPH0596889U - Keyboard structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a keyboard structure in which a plurality of keyboards can be integrally formed while being connected, and the die strength can be maintained. [Structure] Seven keyboard main bodies 1 constituting one octave white key are integrally connected at their base ends 2 by hinges 3. Therefore, since the seven keyboard main bodies 1 can be integrally formed by using the molds with the tip ends thereof being opened radially, the wall thickness of the molds that hit the boundaries of the respective keyboard main bodies 1 becomes thicker and the mold strength becomes stronger. Can hold enough.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a keyboard structure used for keyboard musical instruments such as pianos, organs, and electronic keyboards.

[0002]

[Prior Art]

 Conventionally, the keyboard used for keyboard musical instruments is formed of synthetic resin. In this case, in order to reduce the work of assembling the keyboard, a keyboard structure in which seven keys constituting one octave white key are integrally formed is considered. FIG. 3 shows a conventional keyboard structure. FIG. 3 (A) is a front view and FIG. 3 (B) is a side view. As shown in the figure, seven keyboard bodies 4 are connected by a base end portion 5.

[0003]

[Problems to be solved by the device]

 However, in the conventional keyboard structure, since each keyboard body 4 is formed in a state where it is incorporated in a keyboard instrument, the arrangement interval of each keyboard body 4 is narrow. Therefore, the wall thickness of the die that hits the boundary portion of the keyboard body 4 is thin, and the die strength cannot be maintained. After all, in the conventional keyboard structure, the keyboard main body 4 has to be separately molded as a single item, which is disadvantageous in that the assembling work takes time.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a keyboard structure in which a plurality of keyboards can be integrally formed while being connected and the die strength can be maintained. ..

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention connects a plurality of keyboard bodies by a hinge portion provided at a base end portion of the keyboard body, and integrally forms the plurality of keyboard bodies in a radial arrangement. It is characterized by

[0006]

[Action]

 The operation of the present invention is as follows. Since a plurality of keyboard bodies are connected by a hinge portion provided at the base end and are integrally formed in a state where they are radially arranged, the arrangement intervals of the keyboard bodies can be widened and die strength can be maintained.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a front view showing a keyboard structure to which the present invention is applied. In the figure, 1 is a keyboard body made of synthetic resin, and 2 is a base end. The keyboard body 1 is made up of seven keys to form one octave white key. The base end portions 2 of the respective keyboard bodies 1 are integrally connected by the hinge portions 3, respectively, and the keyboard body 1 is arranged such that the respective tip portions thereof are radially opened. The hinge part 3 is formed in a semicircular shape as shown in FIG. 2 (A), and flexibly connects the respective keyboard bodies 1. Therefore, each keyboard body 1 can hold the hinge portions 3 at arbitrary intervals by the action.

Therefore, since the seven keyboard bodies 1 can be integrally formed by using a die with the tip end portions thereof being radially opened, the wall thickness of the die corresponding to the boundary portion of each keyboard body 1 is large. The mold strength can be maintained sufficiently. Further, since the keyboard main bodies 1 are connected to each other after being integrally formed, the seven keyboard main bodies 1 can be set at one time, so that the assembling work can be completed easily in a short time. The hinge portion 3 is not limited to the shape shown in FIG. 2 (A), but may be modified as shown in FIGS. 2 (B) and 2 (C). That is, FIG. 2 (B) shows a bar-shaped hinge portion 3 provided on the upper portion of the base end portion 2, and FIG. 2 (C) shows a structure in which the hinge portion 3 is provided in the middle portion of the base end portion 2. .. In either configuration, the keyboard bodies 1 can be flexibly connected, and the keyboard bodies 1 can be held at arbitrary intervals.

[0009]

[Effect of the device]

 According to the present invention, the seven keyboard bodies constituting one octave white key can be integrally formed until they are connected and the die strength can be maintained, so that the assembly work time can be shortened and the product unit price can be reduced. Can be made

[Brief description of drawings]

FIG. 1 is a front view showing a keyboard structure to which the present invention is applied.

FIG. 2 is an enlarged view of a main part.

FIG. 3 is a diagram showing a conventional keyboard structure.

[Explanation of symbols]

 1 keyboard body 2 base end 3 hinge

Claims (1)

[Scope of utility model registration request] 1. A keyboard structure in which a plurality of keyboard bodies are connected by a hinge portion provided at a base end portion of the keyboard body and are integrally formed in a state where the plurality of keyboard bodies are radially arranged. .