JPH0362097A - Keyboard device for electronic musical instruments - Google Patents

Abstract

PURPOSE:To eliminate the need for mounting separate detention members and to allow the accurate determination of mounting positions by providing the key detention members of a cantilever type which are provided integrally with key supporting members, are pushed down and elastically deformed when the turning fulcrum parts of keys are fitted to the key supporting members and restore the original after fitted. CONSTITUTION:This device has the plural keys 1 provided with groove parts or projecting parts to the turning fulcra 1a at the rear end and the key supporting members 6 provided with the projecting parts or groove parts corresponding to the groove parts or projecting part of the plural keys 1. The device has also the key detection members 6b of the cantilever type which are provided integrally with key supporting members 6, are pushed down and elastically deformed when the turning fulcrum parts 1a of keys are fitted to the key supporting members and restore the original after fitted. The need for separately mounting the detention members is eliminated in this way and since the detention members and the key supporting member are integrated, the mounting positions are accurately determined.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to the structure of a keyboard device used in electronic musical instruments and the like.

BACKGROUND OF THE INVENTION In recent years, electronic musical instruments such as electronic organs and electronic keyboards have been widely used, and all of these are equipped with keyboard devices.

There is a strong demand for improving the ease of assembling this keyboard device and reducing the number of parts.

A conventional keyboard device for an electronic musical instrument will be explained below.

FIG. 5 shows a side view of a conventional keyboard device for an electronic musical instrument. Referring to FIG. 5, 1 is a key, 2 is a chassis, and a key fulcrum portion 1a is fitted into a fulcrum portion 2a of the chassis 2 to serve as a rotation fulcrum. 12 is a leaf spring, 8 is an upper limit damper for key 1, 9
is a lower limit damper, and the key 1 is urged upward by 1 which comes into contact with the upper limit damper 8. In this state, when the gal is pulled in the A direction, the key fulcrum part 1a comes off from the fulcrum part 2a, and the key fulcrum part 1a moves in the B direction through the window part 2b of the chassis 2, causing the key 1 to come off from the chassis 2. 1. Therefore, a pull-out prevention member 11 made of thick adhesive tape or plastic is fixed to the chassis 2.

Problems to be Solved by the Invention However, in the above configuration, when the adhesive tape is used as the removal prevention member 11, the pasting position becomes inaccurate, the removal prevention effect is poor, and the adhesive tape tends to peel off. As a countermeasure to this problem, when the removal preventing member is made of a plastic sheet-like component, it has disadvantages such as requiring screws for attachment and making the component itself expensive.

The present invention solves the above-mentioned conventional problems, and aims to provide a keyboard device for an electronic musical instrument that has a small number of parts, is inexpensive, easy to assemble, and has a reliable effect of preventing removal.

Means for Solving the Problems In order to achieve this object, the keyboard device for an electronic musical instrument of the present invention includes a plurality of keys provided with grooves or protrusions serving as pivot points at the rear ends, and grooves of the plurality of keys. a key support member provided with a protrusion or a groove corresponding to the edge or protrusion; and a key support member that is provided integrally with the key support member and is pressed down when the rotation fulcrum of the key is fitted into the key support member. The keyboard device for an electronic musical instrument according to claim (2) further includes a cantilever-shaped key that is elastically deformed and restored after being fitted, and a locking member. The number is characterized by having a hole for pushing down the stop member.

According to the keyboard device for an electronic musical instrument described in function claim 0), a key support member serving as a key fulcrum and a stop member for controlling the number of keys are integrally provided,
The number of keys is determined by the elastic deformation of the locking member, so that the locking member returns to its original state after the key is installed, so that it is possible to save the effort of attaching a separate locking member.

According to the electronic musical instrument keyboard device according to claim (2),
There is a hole on the top of the key for pushing down the locking member, so even if the key is damaged and needs to be replaced, a rod-shaped jig can be used to push down the locking member through the key hole. The key can be easily removed by pulling the key.

Embodiment An embodiment of the keyboard device for an electronic musical instrument according to the present invention will be described with reference to FIGS. 1 to 4.

FIG. 1 shows a side view of a keyboard device for an electronic musical instrument according to an embodiment of the present invention. In Figure 1, 1 is the key, 2
8 is a chassis, 8 is an upper limit damper, 9 is a lower limit damper, and the same numbers as in the conventional example shown in FIG. 6 function as components with the same functions. A compression coil spring 5 is stretched between the locking portion 1b of the key 1 and the locking portion 4 of the chassis 2, and biases the key 1.

A key guide 10 is a member that prevents the key 1 from swinging laterally.

e is a key support member, which is composed of a fulcrum part e and a button for pivotally supporting the key fulcrum part 1a, and a member eb to prevent the key 1 from being removed;
A protrusion 6c> and a dowel of are fitted and fixed to the chassis 2. FIG. 2(a) shows a side view of the key support member 6, and FIG. 2(b) shows a part of the key support member 6 viewed from above. In order for the removal preventing member 6b to have elasticity, the key supporting member 6 integral therewith is made of thermoplastic resin.

Reference numerals 6d and 8e are escape holes for making the fulcrum portion 6a and the pull-out stop portion 6b from a mold, respectively. In order to support a plurality of keys 1 at the same time, the key support member e is continuously formed in the same shape.

The operation of the electronic musical instrument keyboard device configured as described above will be described below.

FIGS. 3 and 4 are side views showing the incorporation of a keyboard device for an electronic musical instrument in an embodiment of the present invention.

Press the button in FIG. 3 to fit the compression coil spring 5 into the locking part 4,
A state in which the locking portion 1b of the gal is engaged with the other end of the compression coil spring 5 is shown. As shown in FIG. 4, the key fulcrum portion 1a is fitted onto the fulcrum portion 6a of the key support member e. At this time, the rib 1C of the key 1 pushes down the removal preventing member 6b and elastically deforms it, but as soon as the key 1 is fitted, as shown in FIG.
b is restored. Therefore, even if the key 1 is pulled in the direction A, the lip 1C comes into contact with the retaining member 6b, and the key fulcrum part 1a does not come off from the fulcrum part 6a.

When the key 1 is damaged in the housing and needs to be replaced, the hole 3 can be removed by pushing down the stopper member eb and pulling the key 1 in the direction A.

As described above, according to this embodiment, the key support member e serving as a key fulcrum and the removal stop member eb are integrally provided, and the removal stop member e
Since the key fulcrum part 1a and the fulcrum part 6a are fitted using the elastic deformation of b, the trouble of separately attaching the removal preventing member is saved, and the position of the removal preventing member can be accurately determined.

When replacing the key 1, the key 1 can be replaced by simply pushing down the locking member eb through the hole 3 provided in the key 1 without removing the locking member 6b.

Effects of the Invention As described above, the present invention as set forth in claim (1) is provided integrally with the key support member, and is pushed down and elastically deformed when the rotation fulcrum of the key is fitted into the key support member. By providing a cantilever-shaped locking member that restores its original shape after it has been fitted, there is no need to separately install a locking member, and the lock can be removed easily.
The mounting position can also be determined with high precision because the removal stopper member and the key support member are integrated.

Further, the present invention according to claim (2) is provided with a hole on the top surface of the key for pushing down the key removal stopper.
It is possible to realize an excellent keyboard device for an electronic musical instrument in which key removal can be easily and repeatedly performed without removing the locking member when changing keys.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a side view of a keyboard device for an electronic musical instrument that can be pressed according to an embodiment of the present invention, FIG. 2(a) is a side view showing some of the components of FIG. b) is a plan view of FIG. 2(a), FIGS. 3 and 4 are sectional views for explaining the incorporation of FIG. 1, and FIG. 6 is a side view of a conventional electronic musical instrument keyboard device. . 1...Key, 2...Chassis, 3...
... Hole portion, 4 ... Locking portion, 5 ... Compression coil spring, 6 ... Key support member, 7 ...
...Switch, 8... Upper limit damper, 9...
...lower limit damper, 10...key guide, 11.
...Removal stop member, 12...Plate spring.

Claims (2)

[Claims] (1) A plurality of keys provided with grooves or protrusions serving as rotational fulcrums at the rear end, a key support member provided with protrusions or grooves corresponding to the grooves or protrusions of the plurality of keys, and the key supporter. A cantilever-shaped key retaining member that is provided integrally with the member and elastically deforms when pushed down when the rotation fulcrum portion of the key is fitted into the key support member, and returns to its original state after being fitted. A keyboard device for electronic musical instruments. (2) The keyboard device for an electronic musical instrument according to claim (1), wherein the top surface of the key is provided with a hole for pushing down the key retaining member.