JP2513621Y2 - Keyboard device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a keyboard device to be mounted on various keyboard musical instruments such as an electronic keyboard musical instrument such as an electronic organ and an electronic piano.

[Outline of device]

This invention relates to a keyboard device in which a plate-like elastic body for returning a key is locked between a key and a key supporting member that swingably supports the key, and the plate-like elastic body is engaged on the key supporting member side. By forming the elastic body end receiving member to be stopped on the key supporting member by forming the elastic member end receiving member on the key supporting member, incomplete mounting of the plate-like elastic body or deformation due to it or detachment due to key pressing operation, etc. Is to prevent.

[Conventional technology]

A keyboard device mounted on a keyboard musical instrument such as an electronic organ or an electronic piano supports a large number of keys (white keys and black keys) swingably on a key supporting member (generally a keyboard frame) fixed to the instrument body. An elastic body for returning a key is provided between each key and the key support member to give a returning force to the upper side when the key is pressed and rocks.

As the elastic body for returning the key, a coil spring or a leaf spring is generally used. For example, JP-A-62-275297.
Japanese Patent Laid-Open Publication No. 64-10077 and Japanese Patent Laid-Open Publication No. 64-10077 disclose that a key locking plate spring is locked at its front end to a spring locking portion formed integrally with each key, and each rear end thereof is connected to a keyboard frame. It is locked to the spring receiving part formed by press working,
The leaf spring is bent slightly upward and mounted to give each key a restoring force.

[Problems to be solved by the device]

However, in the keyboard device using the plate-shaped elastic body as the elastic body for key return, as in the above example,
Since the rear end of the plate-shaped elastic body whose front end is locked by the key is locked by the spring bearing part formed by partially deforming the keyboard frame by press working, the accuracy of the press die is Not only there is a problem that burrs are generated during processing, but also there is little freedom of shape, so the spring receiving part is formed in the optimum shape according to the end shape and elastic coefficient of the plate-like elastic body. It was difficult to do.

Therefore, there is a problem in that the locking of the rear end of the plate-shaped elastic body is likely to be in an incompletely assembled state, which easily causes deformation of the plate-shaped elastic body itself or spring disengagement due to a key pressing operation.

The present invention has been made in view of the problems in such a conventional keyboard device, and the rear end portion of the plate-like elastic body can be easily attached to the locking portion on the side of the key supporting member, so that the engaging portion is always reliably engaged. It is an object of the present invention to prevent the plate-like elastic body from being deformed or come off, and to obtain a constant operation feeling when operating the keyboard.

[Means for solving the problem]

According to the invention, there is provided a key support member fixed to a musical instrument body, a key swingably supported by the key support member, and a key returning member having both ends locked to the key and the key support member. In a keyboard device including a plate-shaped elastic body, in order to achieve the above object, a locking portion that locks a rear end portion of the plate-shaped elastic body on a key support member side and a plate-shaped elastic body when mounted. An elastic body end receiving member including a guide portion for guiding the rear end portion of the plate-like elastic body is integrally formed on the engaging surface of the engaging portion with synthetic resin to support the key on the key supporting member. It is fixedly provided at a position different from the member.

Further, the guide portion of the elastic body end receiving member is provided with a pair of side guide surfaces that are inclined surfaces that are symmetrically narrowed in the insertion direction of the plate-like elastic body, and a downward upper guide surface.

[Action]

The keyboard device according to the present invention has the above-described structure, and the elastic end receiving member is provided with the engaging portion, the guide portion having the side guide surface and the upper guide surface, and the shape of the rear end portion of the plate-like elastic body. It can be formed in an optimum shape according to the elastic coefficient and the like, and can be provided at an optimum position on the key support member.

Then, when the plate-like elastic body that gives a restoring force to the key is attached,
Both side edges of the rear end portion are guided by the pair of side guide surfaces of the guide portion of the elastic end receiving member, and the upper end edge is guided by the downward upper guide surface, so that the engaging portion can be easily and smoothly formed. It reaches the locking position of and is locked reliably and stably. After that, the side guide surface and the upper guide surface of the guide portion also serve to prevent the rear end portion of the plate-like elastic body from being displaced or coming off.

Therefore, deformation due to incomplete mounting of the elastic plate,
It is possible to prevent disengagement due to a heavy key depression operation, and to obtain a constant key operation feeling.

〔Example〕

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

FIG. 1 is a sectional view taken along the longitudinal direction of a key of a keyboard device for an electronic keyboard instrument according to an embodiment of the present invention.

Reference numeral 1 denotes a key integrally molded of synthetic resin (the illustrated example shows a white key, but the black key is also different in shape, and the parts related to the present invention are the same, so the names are collectively referred to as the end. Is called "key".

Although this key 1 is formed in a channel shape, its rear end has an engaging portion with a keyboard frame 2 which is a key supporting member described later.
1a is provided with a temporary locking piece 1b in front of which is temporarily fixed the rear end of the key return spring (leaf spring) 3 which is a plate-like elastic member for key return.
Further, an actuator piece 1d provided with a locking portion 1c for locking the front end portion of the key return spring 3 slightly forward of the center in the longitudinal direction.
, And the stopper pieces 1e project downward from the front thereof.

On the other hand, the keyboard frame 2 is press-formed by a metal plate such as an iron plate, the rear portion is provided with a through hole 2b into which the rising portion 2a and the engagement portion 1a of the key 1 are fitted, and the stopper piece 1e of the key 1 is provided in the front portion. A step portion 2d having a window 2c to be inserted is provided, and an upper limit stopper 4 made of a cushioning material such as felt is provided on the lower surface of the upper step portion, and a lower limit stopper 5 made of the same cushioning material is provided on the upper surface of the lower step portion. ing.

Further, a key guide 6 made of synthetic resin is erected right behind the upper limit stopper 4 of the keyboard frame 2, and further behind that, an opening for allowing the actuator piece 1d of the key 1 to be inserted.
Forming 2e.

Then, behind the opening 2e, the substrate supporting member 7 and the substrate holding member 8 which is erected downward from the vicinity thereof and bent in the shape of a "Shi" are integrally molded by a synthetic resin having a slight elasticity. And is protruding downward.

Further, a substrate supporting member 7 and a runner portion 9 are connected to the rear side of the substrate supporting member 7 and the spacer member 10 having the positioning protrusion 10a and the screw hole is further displaced to the position rearward of the spacer member 10 in the direction perpendicular to the paper surface. Substrate pressing members 12 which are bent in a U shape integrally with the end portion supporting member 11 and have a spring property are provided so as to protrude downward.

Further, a spring seat 20 which is an elastic end receiving member for locking the rear end of the key return spring 3 is provided in the through hole formed between the spacer member 10 and the substrate rear end supporting member 11. (Details will be described later).

These are the key guide 6, the substrate supporting member 7, and the substrate holding member.
8, the spacer member 10, the substrate rear end supporting member 11, the substrate pressing member 12, and the spring seat 20 are all formed on the keyboard frame 2 by outsert molding of synthetic resin.

In addition, as shown in FIG. 2, the rear end portion of the key return spring 3 has a central portion in the width direction which extends to form a guide portion.
A pair of shoulder-shaped locking portions 3 that are locked to the spring seats 20 on both sides thereof.
b and 3b are formed.

In this embodiment, when the key 1 is mounted on the keyboard frame 2, the locking portion 1c of the key 1 and the tip locking portions of the temporary locking pieces 1b are attached to the front end portion and the rear end portion of the key return spring 3. The engaging portions 1a of the key 1 are engaged with the through holes of the keyboard frame 2 by engaging the engaging portions 3b respectively.
2b, insert the tip locking portion of the temporary locking piece 1b into the through hole 21 of the spring seat 20, move the locking portion 3b of the key return spring 3 to the locking surface of the spring seat 20, and engage with it. Stop it.

As a result, the key return spring 3 is slightly curved upwards and locked between the locking portion 1c of the key 1 and the spring seat 20 on the keyboard frame 2 as shown in the figure, and the restoring force thereof causes the key 1 is urged forward and upward with respect to the keyboard frame 2.

Therefore, the key 1 is engaged with the front end of the engaging portion 1a of the key 1 at the front edge of the through hole 2b of the keyboard frame 2 and is swingably supported with the engaging point as a fulcrum. Given the habit, the stopper piece 1e is always held in contact with the upper limit stopper 4 as shown by the solid line.

When the key is pressed as shown by the arrow P, the key 1 swings counterclockwise against the return force of the key return spring 3, and the stopper piece 1e is moved as shown by the phantom line in FIG. The actuator stops when it contacts the lower limit stopper 5, and at that time, the actuator piece 1d pushes a key switch (not shown) to operate it, generating a key depression signal.

After that, when the player's finger is separated from the key 1, the key 1 is immediately returned to the state indicated by the solid line by the return force of the key return spring 3.

By the way, a printed circuit board 15 on which a circuit for generating a musical tone signal is formed is attached to the rear surface side of the keyboard frame. At that time, first, the printed circuit board 15 is attached to the keyboard frame 2 as shown by imaginary lines. Inclining, pushing the front end portion in the gap between the substrate supporting member 7 and the substrate holding member 8 in the direction of arrow A, and then rotating in the direction of arrow B,
The positioning protrusion 10a of the spacer member 10 is fitted into the positioning hole 15a, and the rear end portion of the spacer pressing member 12 is pushed in while flexing the substrate pressing member 12 to contact the substrate rear end portion supporting member 11.

As a result, the front end of the printed circuit board 15 is clamped in the thickness direction by the substrate supporting member 7 and the substrate holding member 8,
The substrate holding member 8 and the substrate pressing member 12 are also sandwiched in the width direction and temporarily fixed to the keyboard frame 2.

Then, the screws 16 are inserted into the screw holes 15b of the printed board 15 and the screw holes of the spacer member 10 and screwed into the tap holes of the keyboard frame 2 to be fixed.

A key switch 17 is provided on the printed circuit board 15 as shown by an imaginary line so that the key switch 17 is projected upward from an opening formed in the keyboard frame 2 so that a position corresponding to the key 1 is shown by an imaginary line. The actuator piece 1f may be provided so that the key switch 17 is activated by the actuator piece 1f when a key is pressed to generate a key pressing signal.

Next, details of the spring seat 20 which is the elastic body end receiving member in this embodiment will be described with reference to FIGS. 3 to 5.

3 is a plan view of the spring seat 20, and FIG. 4 is CC of FIG.
FIG. 5 is a cross-sectional view taken along the line, and FIG. 5 is a cross-sectional view taken along the line D-D in FIG. 3 in which the key return spring is mounted.

This spring seat 20 has a relatively large through hole in the widthwise central portion.
21, a pair of small through holes 22, 22 are formed in front of both sides thereof, and a pair of side guide surfaces 23a, which form a sloped surface symmetrically narrowed in the insertion direction of the key return spring 3 on both sides thereof. The side guide pieces 23, 23 forming 23a, and a pair of upper guide pieces 24, 24 forming an upper guide surface 24a having a curved lower surface as shown in FIGS. A pair of locking surfaces 25, 25, each of which is an inclined surface, is provided on the inner side of the direction.

These are integrally formed by outsert molding of the keyboard frame 2 with a synthetic resin.

Then, when the rear end of the key return spring 3 temporarily locked to the key 1 is inserted into the spring seat 20, both side edges thereof are guided by the pair of side guide surfaces 23a, 23a to guide the The tip of the portion 3a is inserted into the through hole 21. Then, the locking portions 3b, 3b on both sides thereof are guided by the pair of upper guide surfaces 24a, 24a, and the pair of locking surfaces 2
It reaches the bottom of 5,25 and is securely locked to it.

Since the spring seat 20 is formed of a member (synthetic resin in this example) different from the keyboard frame 2, the degree of freedom of the shape is large,
An optimum guide shape to the regular locking position can be created according to the rear end shape of the key return spring 3 and the mounting angle.

Therefore, the key return spring 3
If the rear end of the
There is no fear of getting out of 20.

In addition, this invention is not limited to the keyboard device of the electronic keyboard musical instrument,
It can be applied to keyboard devices for wind instrument and other various keyboard instruments.

[Effect of device]

As described above, the keyboard device according to the present invention has a large degree of freedom in the shape of the elastic body end receiving member, and includes the engaging portion and the guide portion having the side guide surface and the upper guide surface.
The plate-like elastic body can be formed in an optimum shape according to the shape and elastic coefficient of the rear end portion and can be provided at an optimum position on the key support member.

Then, when the plate-like elastic body that gives a restoring force to the key is attached,
Both side edges of the rear end portion are guided by the pair of side guide surfaces of the guide portion of the elastic end receiving member, and the upper end edge is guided by the downward upper guide surface, so that the engaging portion can be easily and smoothly formed. After reaching the locking position, the plate-like elastic body is prevented from being displaced or coming off by the side guide surface and the upper guide surface of the guide portion.

Therefore, deformation due to incomplete mounting of the elastic plate,
It is possible to prevent disengagement due to a heavy key depression operation, and since the rear end of the plate-like elastic body is always reliably and stably locked even when the keyboard is operated, a constant operation feeling can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view taken along the longitudinal direction of a key of a keyboard device for an electronic keyboard instrument according to an embodiment of the present invention, FIG. 2 is a plan view showing only a rear end portion of the key return spring 3, and FIG. 1 is a plan view of the spring seat 20 in FIG. 1, FIG. 4 is a cross-sectional view taken along line CC of FIG. 3, and FIG. 5 is D- of FIG. 3 shown with a key return spring attached.
It is sectional drawing which follows the D line. 1 ... key, 1a ... engaging part, 1b ... temporary locking piece 1c ... locking part, 1d, 1f ... actuator piece 1e ... stopper piece 2 ... keyboard frame (key supporting member) 3 ... … Key return spring (plate elastic body), 3a …… Guide part 3b …… Locking part, 7 …… Board support member 8 …… Board holding member, 10 …… Spacer member 11 …… Board rear end support member 12 …… Board pressing member, 15 …… Printed circuit board 20 …… Spring seat (elastic end receiving member) 21 …… Through hole, 22 …… Small through hole, 23 …… Side guide piece 24 …… Top guide One, 25 ... Locking surface

Claims (1)

(57) [Scope of utility model registration request] 1. A key supporting member fixed to a musical instrument body, a key swingably supported by the key supporting member, and a key returning member having both ends locked to the key and the key supporting member. In the keyboard device provided with the plate-shaped elastic body, a locking portion that locks the rear end of the plate-shaped elastic body on the key support member side and the locking portion when the plate-shaped elastic body is mounted. An elastic body end receiving member including a guide portion for guiding the rear end portion of the plate-shaped elastic body is integrally formed on the stop surface with a synthetic resin, and is provided at a position different from the key supporting portion on the key supporting member. It is fixedly provided, and the guide portion is provided with a pair of side guide surfaces that are inclined surfaces that are symmetrically narrowed in the insertion direction of the plate-shaped elastic body, and a downward upper guide surface. Keyboard device