JP2514647Y2 - Key guide structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a key guide structure in a keyboard instrument.

[Prior Art and its Problems] A keyboard of a keyboard musical instrument such as an electronic piano is provided with a key for guiding the vertical movement of the key end when pressing and releasing the key and for controlling the upper and lower limit positions. A guide structure is provided.

 A conventional key guide structure is shown in FIG.

In the figure, a is a guide part of the key, b is an upper limit restricting part for restricting upward movement of the key at a predetermined position when releasing the key, and c is a downward direction of the key when pressing the key. It is a lower limit regulating piece that regulates the movement at a predetermined position, and each is made of felt. Further, d is a keyboard chassis, and a board e is attached by machine screws f over substantially the entire length of the keyboard chassis d, and a vertical piece g is erected on the board e in a comb shape. The guide piece a is attached to the surface of the piece g, and the lower limit regulating piece c and the upper limit regulating piece b are attached to the upper surface and the lower surface of the substrate e, respectively.

In such a configuration, when the tip end of the key h whose base end is pivotally supported by the keyboard chassis (not shown) moves up and down by pressing or releasing the key, the upper surface j of the protrusion i of the key h and the key h The lower surfaces 1 of the side walls k abut against the lower limit restriction piece c and the upper limit restriction piece b, respectively, and the inner side surfaces of the side walls k of the key h are guided by the guide pieces a.

However, according to the conventional key guide structure having the above-described configuration, the upper limit regulating piece b and the lower limit regulating piece c are provided.
Also, since the guide pieces a are manufactured separately,
As a result, the number of parts to be used is large, the number of manufacturing steps and the number of steps are large, the number of steps for individually mounting the large number of pieces to the board e is large, and further, the abutting surface and the guide surface on which they are installed There is a problem in that the number of man-hours required for adjustment increases, which increases the manufacturing cost of the keyboard.

[Purpose of Invention] This invention was made in view of the above-mentioned circumstances, and the purpose thereof is to significantly reduce the number of parts used,
An object of the present invention is to provide a key guide structure that can reduce the manufacturing cost, the working time required for mounting and adjusting the manufacturing process, and the manufacturing cost.

[Summary of the Invention] In order to achieve the above-mentioned object, the present invention integrally forms a guide piece, an upper limit regulating piece and a lower limit regulating piece, and the integrally formed key guide member is attached to a keyboard chassis. The point is that it is integrally attached to the substrate.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

Reference numeral 1 is a key guide member for smoothly and reliably guiding the key 2 in the vertical direction. The guide member 1 is made of a cushioning material such as polyester felt, and has a guide piece 4, an upper limit regulating piece 5 and a lower limit regulating portion. The piece 6 is integrally formed.

Further, the substrate 3 includes a plate-shaped horizontal piece 3a and a plurality of vertical pieces 3b vertically arranged in a comb shape over one end of the horizontal piece 3a.
It is formed by and.

The guide piece 4 surrounds the vertical piece 3b of the substrate 3 and is formed in a plate shape having a vertical chamfering groove 4a at the center of both surfaces.

Further, the upper limit restricting piece 5 is connected to the base of the guide piece 4 and is formed on the lower surface of the horizontal piece 3a in a plate shape over substantially the entire length.

Further, the lower limit restricting piece 6 is connected to the base of the guide piece 4 and is formed on the upper surface of the horizontal piece 3a in a semicylindrical shape over substantially the entire length.

 In the figure, 3c is a mounting hole.

Reference numeral 8 is a keyboard chassis, and the board 3 is provided with a machine screw 9 on the left end portion (the front end portion for the operator) of the keyboard chassis 8.
Installed by. Incidentally, 9a is a washer for the machine screw 9.

The base end of the key 2 is pivotally supported by the other end of the keyboard chassis 8 (not shown), and a hook-shaped protrusion 10 is formed at the tip of the key 2 and the upper surface 10a of the protrusion 10 is The lower surface 2b of both side walls 2a of the key 2 faces the upper limit restricting piece 5 and the lower limit restricting piece 6
And the inner side surfaces of the side walls 2a are rubbed and guided to both sides of the guide piece 4.

When the key 2 is pressed, the key 2 pivots downward about the pivot portion (not shown) while the side wall 2a is slid and guided by the guide piece 4, and the lower surface 2b of the side wall 2a is moved. When the upper limit 10a of the protruding portion 10 abuts on the lower limit regulating piece 6 and the key 2 is released, the upper surface 10a of the protruding portion 10 abuts on the upper limit regulating piece 5. At this time, the individual pieces 4, 5, 6 give the person who operates the key 2 a felt-like feel.

In this invention, as described above, the guide piece 4, the upper limit regulating piece 5, and the lower limit regulating piece 6 are integrally formed, and the integrally formed key guide member is integrally attached to the substrate. Since the key guide member 1 can be a single member, the manufacturing process and man-hours can be significantly reduced. Furthermore, since the guide member 1 can be formed by an accurate integral molding process or the like, it is possible to omit the mounting work and the dimension adjustment work between the respective side edges.

[Effects of the Invention] As described in detail above, according to the present invention, the guide part that constitutes the key guide member, the restricting part and the lower limit restricting part are integrally formed, and the integrally formed key guide. Since the member is integrally attached to the substrate, the number of key guide members can be set to one, so that the manufacturing process and man-hours can be significantly reduced as compared with the conventional case. In addition, since the guide member can be accurately manufactured by integral molding, etc., it is possible to save the mounting work between each piece and
The adjustment work between each piece can be omitted.

Therefore, there is an effect that the manufacturing cost of this device can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view of an essential part showing an embodiment of the present invention, and FIG.
FIG. 3 is a partially omitted perspective view showing a state where a key guide structure is integrally arranged on a substrate, and FIG. 3 is a longitudinal sectional view of a main part showing a conventional key guide structure. 1 ... key guide member, 2 ... key, 3 ... substrate, 3a ... horizontal part, 3b ... vertical part, 4 ... guide part, 5 ... upper limit part, 6 ... lower limit Restriction piece, 8 ... Keyboard chassis.

Claims (1)

(57) [Scope of utility model registration request] 1. A keyboard chassis for pivotally pivoting a large number of keys, and a plate-shaped horizontal portion mounted over substantially the entire length of the keyboard chassis so as to project to the key-pressing side end of the keyboard chassis. A substrate composed of a plurality of vertical pieces and a plurality of comb-shaped vertical pieces extending from the projecting ends of the horizontal pieces, and surrounding the outer periphery of each of the vertical pieces, and when pressing and releasing the key. At the time of the key,
While being rubbed against the inner side surface of this key, it is attached to the upper surface of the guide part that guides this key in the vertical direction and the horizontal part, and when the key is pressed, the downward movement of this key is prevented. A key consisting of a lower limit restricting piece that restricts the key at a predetermined position and an upper limit restricting piece that is attached to the lower surface of the horizontal piece and restricts the upward movement of the key at a predetermined position when the key is released. In a key guide structure including a guide member, the guide part piece, the upper limit restricting part piece and the lower limit restricting part piece forming the key guide member are integrally formed, and the integrally formed key guide member is integrated with the substrate. The key guide structure is characterized by being attached to.