JP6819447B2 - Keyboard instrument - Google Patents

Description

The present invention relates to a keyboard instrument that sounds a sounding body such as a lead provided corresponding to a key.

Conventionally, a music box device that vibrates a sounding body such as a lead to make a sound is known. Patent Document 1 discloses a configuration in which a rotating rotary pick is provided corresponding to a reed, and the reed is repelled by a drive claw provided on the outer periphery of the rotary pick. In this configuration, the plunger is provided with an engaging portion, and the rotary pick is rotationally driven by driving the driving claw of the rotary pick with the engaging portion when the plunger is displaced.

Japanese Unexamined Patent Publication No. 2004-61608

However, since the plunger reciprocates, if the engaging portion comes into contact with the rotary pick or its driving claw during return, the rotary pick may rotate in the reverse direction and an appropriate sounding operation may not be performed. Therefore, in Patent Document 1, the reversal of the rotary pick is prevented by a ratchet mechanism or a cam mechanism so that the rotary pick rotates in only one direction.

By the way, in Patent Document 1, a cushioning material is provided in the plunger in order to reduce mechanical noise when the engaging portion of the plunger abuts on the drive claw of the rotary pick, and further, the lower end portion of the hook portion of the plunger is provided. It is described that the cushioning material may be extended to the engaging portion. In this way, by providing a cushioning material in the part of the plunger that drives the rotary pick, the plunger can be slightly elastically deformed even if it interferes with the rotary pick at the time of return, and the reverse direction in the return stroke is compared with that in the outward stroke. Rotational driving force can be reduced. However, elastic deformation alone is not sufficient, and a rotational driving force in the opposite direction is applied to the rotary pick. Therefore, it is practically necessary to provide a reverse rotation prevention function as shown in Patent Document 1, and there is a problem that the configuration for that purpose is complicated.

The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is a keyboard capable of rotating a rotating body in one direction by pressing a key with a simple configuration to perform stable and reliable sounding. It is to provide musical instruments.

In order to achieve the above object, the keyboard instrument according to claim 1 of the present invention includes a plurality of keys, a plurality of sounding bodies (13) that are provided corresponding to the plurality of keys and can be sounded, and the plurality of sounding bodies (13). A plurality of rotating bodies (30) provided corresponding to each sounding body, having a driven portion (32) and rotatable around a rotation axis, and a plurality of rotating bodies (30) provided on the plurality of rotating bodies and corresponding sounding. For each of the sounding body driving unit (32) that drives the body to make a sound, and the displacement member (24) that is either the plurality of keys themselves or the members that are displaced with the movement of the keys. From each of the elastic member (21) supported by the first support portion and the second support portion in a double-holding state, and between the first support portion and the second support portion. It has a rotating body driving unit (22) and a restricting unit (25) provided so as to project, and receives from the driven unit when the rotating body driving unit and the driven unit come into contact with each other in the key pressing stroke. The restricting portion regulates the rotational displacement of the rotating body driving portion in a direction corresponding to the reaction force, and the rotating body driving portion of the elastic member drives the driven portion of the corresponding rotating body. When the rotating body is rotated and the rotating body driving unit and the driven unit come into contact with each other in the key release stroke, the rotational displacement of the rotating body driving unit in a direction corresponding to the reaction force received from the driven unit is described. It is characterized in that the rotating body driving unit escapes due to rotational displacement of the rotating body driving unit in a direction corresponding to a reaction force received from the driven unit without being regulated by the regulating unit. The symbols in parentheses are examples.

According to the present invention, a rotating body can be rotated in one direction by pressing a key with a simple configuration to perform stable and reliable sounding.

It is a side view of a keyboard instrument and an enlarged side view of the vicinity of a rotary pick. It is a schematic diagram which shows the transition of the operation of an actuator and a rotary pick in a key release stroke. It is a schematic side view which shows the 1st, 2nd, 3rd modification examples of a hanging part and an actuator.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1A is a side view of a keyboard instrument according to an embodiment of the present invention. This keyboard instrument has a plurality of keys 10 including a white key and a black key. This keyboard instrument is configured to vibrate and sound the lead 13 which is a sounding body provided corresponding to the key 10 by the operation of the key 10. Although the white key is illustrated as a representative of the key 10 in FIG. 1A, the black key has the same configuration as the white key except for the key body. The key 10 is rotatably supported around a key fulcrum 11 with respect to a key column (not shown). The longitudinal direction of the key 10 is the front-back direction, and the free end side of the key 10 is the front side. A hanging portion 24 hangs down from the lower portion of the main body of the key 10. The longitudinal direction of the key 10 is the front-back direction.

A plurality of leads 13 having different sound pitches are cantilevered and extended from the lead column 12 in a comb-teeth shape. The length and width of each lead 13 differ depending on the pitch, and the positions of the free ends in the front-rear direction are the same. A rotary pick 30 which is a rotating body is arranged close to the tip of the lead 13 corresponding to each lead 13. Each rotary pick 30 is rotatably supported around a common rotation axis, and can rotate independently and smoothly around the axis center C (FIG. 1B) of the rotation axis. A lower end of a spring 19 composed of a leaf spring is fixed to the pedestal 18 corresponding to a rotary pick 30. The lead column 12, the rotating shaft of the rotary pick 30, and the pedestal 18 are supported by a frame (not shown) that supports a plurality of keys 10.

Since the configurations of the rotary pick 30, the lead 13, and the like corresponding to each key 10 are common, a configuration of one set will be mainly described. The key 10 is always urged in the non-pressed position (position shown in FIG. 1A) by an urging member (not shown). The upper limit stopper (not shown) regulates the non-pressing position of the key 10 in a non-operating state, and the lower limit stopper (not shown) regulates the end position of pressing the key. In the key pressing process when the key 10 is pressed, the free end of the key 10 is displaced downward. In the key release operation when the finger is released from the key 10 from the key pressing end state, the key 10 is displaced in the opposite direction to the key pressing operation and returns to the non-key pressing position.

FIG. 1B is an enlarged side view of the vicinity of the rotary pick 30. An actuator 20 for rotationally driving the rotary pick 30 is provided at the rear portion of the hanging portion 24. The actuator 20 is supported by the upper support portion 16 and the lower support portion 17 fixed to the hanging portion 24 in a double-held state. The actuator 20 is made of an elastic member such as a flexible soft resin. The actuator 20 has a base portion 21 and a rotating body driving portion 22 and is integrally formed. The base portion 21 has a plate shape and is extended with the hanging direction of the hanging portion 24 as the longitudinal direction, and the thickness in the front-rear direction is thinner than the width in the arrangement direction of the keys 10 so as to be easily bent in the front-back direction. There is. The rotating body driving unit 22 is integrally projected from the base unit 21 to the side (rear side) where the rotary pick 30 is located.

The rotary pick 30 is made of a thin metal plate and is formed in a substantially circular shape in a side view, and a plurality of (for example, four) protrusions 32 are integrally formed on the outer peripheral portion thereof. The rotary pick 30 is provided with a circular sliding portion 31 fixedly on both sides in a side view. The spring 19 is pressed against the outer peripheral surface of the sliding portion 31 to constantly generate an appropriate amount of friction, so that the rotary pick 30 does not easily rotate in the reverse direction when the key is released. The key 10, the rotary pick 30, and the lead 13 have a one-to-one correspondence with each other. The number of rotation shafts and lead columns 12 of the rotary pick 30 may be plurality, and for example, these are provided for each octave. Further, the key 10 may also be configured in units of a plurality of keys (for example, one octave). Although the shape of the lead 13 is schematically shown, it is desirable to provide an inclined surface at the tip as illustrated in FIG. 1 (b) and the like.

Between the upper support portion 16 and the lower support portion 17, the regulation portion 25 extends rearward from the rear surface of the hanging portion 24. In the free state, which is a non-operating state, the rear end surface, which is the tip of the regulating portion 25, faces the base portion 21 and is in contact with the base portion 21 or is close to the base portion 21 with a slight gap. It is desirable that the regulating portion 25 is made of a material that is less likely to be elastically deformed than the base portion 21. When viewed from the side, the rotating body driving unit 22 exhibits a substantially triangular shape. The connecting portion 22a between the base portion 21 and the rotating body driving portion 22 corresponds to one of the sides of the triangle. Of the connecting portions 22a, the upper end portion is referred to as the first end portion P1 and the lower end portion is referred to as the second end portion P2. In the extending direction of the base portion 21, the regulating portion 25 is located in the vicinity of the first end portion P1. In the example of FIG. 1B, the rear end surface of the regulating portion 25 faces the front surface of the base portion 21 above the first end portion P1.

By a normal key pressing operation, the rotary pick 30 is rotated in the counterclockwise direction of FIG. 1 (b) by driving the protrusion 32 by the rotating body driving unit 22. The protrusion 32 has both a function as a driven unit that receives a driving force from the rotating body driving unit 22 and a function as a sounding body driving unit that drives the lead 13. A substantially flat surface of the protrusion 32 on the rear side in the rotation direction functions as a driven portion. The side view substantially arcuate or oblique surface on the front side in the rotation direction of the protrusion 32 repels the lead 13. The reed 13 vibrates when it is flipped, and the vibration is transmitted to the installation surface through a frame (not shown) through the reed column 12.

Here, the base portion 21 tends to bend in the front-rear direction. Assuming that there is no regulating unit 25, when the rotating body driving unit 22 receives a reaction force from the rotary pick 30 in the upward / downward direction, the base unit 21 bends and the rotating body driving unit 22 is shown in FIG. 1 (b). ) Rotates and displaces counterclockwise / clockwise. However, since the regulating unit 25 is arranged in the vicinity of the first end portion P1, the regulating unit 25 regulates the rotational displacement of the rotating body driving unit 22 in the counterclockwise direction in the key pressing stroke, and the key is released. In the stroke, the regulating unit 25 does not regulate the clockwise rotational displacement of the rotating body driving unit 22. The details will be described with reference to FIG. As a result, the rotating body driving unit 22 appropriately drives the protrusion 32 in the key pressing stroke, and the rotating body driving unit 22 escapes due to rotational displacement in the key release stroke, so that the rotary pick 30 is not rotated in the reverse direction.

2 (a) to 2 (e) are schematic views showing the transition of the operation of the actuator 20 and the rotary pick 30 in the key release stroke.

Regarding the operation, first, when the key is pressed from the initial position (FIG. 2A) corresponding to the non-pressed state, the actuator 20 is lowered as the hanging portion 24 of the key 10 rotates in the forward direction. The tip of the rotating body driving portion 22 of the actuator 20 begins to engage with the protruding portion 32 of the rotary pick 30 (FIG. 2B). The rotary pick 30 starts rotating around the axis C. On the other hand, the rotating body driving unit 22 receives an upward reaction force from the protrusion 32 and tries to rotate counterclockwise. That is, the portion of the base portion 21 above the first end portion P1 tends to bend forward (to the left in FIG. 2). However, the restricting portion 25 surely contacts the portion above the first end portion P1 of the base portion 21, and as a result, the hanging portion 24 and the upper portion are in a contacting relationship, so that the upper portion is bent. Is regulated (Fig. 2 (c)). As a result, the rotational displacement of the rotating body driving unit 22 in the counterclockwise direction is restricted, and the rotating body driving unit 22 can reliably drive the protrusion 32. When the rotating body driving unit 22 drives the protrusion 32, the protrusion 32 located at a symmetrical position with the driven protrusion 32 flips the tip of the lead 13, whereby sound is produced (FIG. 2D). ..

Further, the actuator 20 is lowered, and when the key press is completed, the actuator 20 reaches the rotation end position. After that, the key release operation is performed to transition to the key release process. In the key release stroke, the actuator 20 rises, and the rotating body driving unit 22 eventually comes into contact with mainly the protrusion 32 of the rotary pick 30. Then, the rotating body driving unit 22 receives a reaction force forward or downward from the rotary pick 30 or the protrusion 32 and tries to rotate in the clockwise direction. That is, the portion of the base portion 21 below the second end portion P2 tends to bend rearward (to the right in FIG. 2). At that time, there is no member that regulates the bending of the base portion 21 in the vicinity of the second end portion P2, and the portion above the first end portion P1 of the base portion 21 rather tries to bend in the direction away from the regulating portion 25. To do. Therefore, the rotating body driving unit 22 is rotationally displaced clockwise without being restricted by the regulating unit 25 (FIG. 2 (e)). As a result, the rotating body driving unit 22 can escape the rotary pick 30 (mainly the protrusion 32) and smoothly get over the protrusion 32. After that, when the rotational displacement of the rotating body driving unit 22 returns and the key release is completed, the hanging portion 24 and the actuator 20 return to the initial positions (FIG. 2A). Depending on the position setting, the rotating body driving unit 22 may mainly come into contact with the outer peripheral surface of the rotary pick 30 (the surface on which the protruding portion 32 is projected), but in that case, the rotating body driving unit 22 rotates. The action of escape due to displacement can be considered in the same way.

In this way, when the rotating body driving unit 22 and the protruding portion 32 come into contact with each other in the key release stroke, the rotational displacement of the rotating body driving unit 22 in the direction (clockwise) according to the reaction force received from the protruding portion 32 is restricted. The unit 25 is not regulated, and the rotating body driving unit 22 rotates and displaces in the direction to escape. As a result, the rotating body driving unit 22 reliably drives the protrusion 32 in the key pressing stroke, and the rotating body driving unit 22 can easily drive the rotating body driving unit 22 when the rotating body driving unit 22 and the rotary pick 30 come into contact with each other in the key release stroke. Escape by rotating.

Therefore, according to the present embodiment, a rotating body (rotary pick 30) can be rotated in one direction by pressing a key with a simple configuration to perform stable and reliable sounding. In particular, in the key release stroke, the driving force in the reverse direction exerted by the rotating body driving unit 22 on the rotary pick 30 can be reduced, so that the reverse rotation prevention mechanism of the rotary pick 30 can be eliminated or simplified. In the present embodiment, a reverse rotation prevention function due to friction between the sliding portion 31 and the spring 19 is provided, but this is not essential.

Further, since the function of the driven unit and the function of the sounding body driving unit are performed by the same protrusion 32, the configuration can be simplified by standardizing the driven unit and the sounding body driving unit.

Next, various modification examples will be described with reference to FIG. The regulating unit 25 makes the vicinity of the first end portion P1 and the hanging portion 24 in a contacting relationship when the rotating body driving unit 22 and the protruding portion 32 come into contact with each other in the key pressing stroke, so that the rotating body driving unit 22 is counterclockwise. The configuration may be such that the rotational displacement in the direction is regulated. Here, the first end portion P1 is an end portion of the connecting portion 22a on the side opposite (upper side) to the side where the rotating body driving portion 22 contacts the protrusion 32 in the key pressing stroke in the longitudinal direction of the base portion 21. Is.

3A, 3B, and 3C are schematic side views showing first, second, and third deformation examples of the hanging portion 24 and the actuator 20.

In the example of FIG. 1 (a), the regulation unit 25 is integrally formed with the hanging portion 24, but as in the first modification (FIG. 3 (a)), the regulation unit 25-corresponding to the regulation unit 25 2 may be configured separately from the hanging portion 24 and fixed to the hanging portion 24 by adhesion or the like. The fixing method does not matter. Alternatively, as in the second modification (FIG. 3B), the regulating portion 25-3 is integrally formed so as to project from the front portion of the base portion 21, and the tip surface (front end surface) of the regulating portion 25-3 is formed. ) May face the rear surface of the hanging portion 24. Alternatively, as in the third modification (FIG. 3C), the regulation portion 25-4 may be configured separately from the base portion 21 and may be fixed to the front portion of the base portion 21 by adhesion or the like. The fixing method does not matter. In the free state, any of the regulating portions may come into contact with the opposing member or may be close to each other with a slight gap. It is desirable that all the regulating portions are made of a material that is less likely to be elastically deformed than the base portion 21. If the regulating portion is integrally formed with the hanging portion 24 or the base portion 21, the number of parts can be reduced.

By the way, the configuration in which the actuator 20 is provided on the hanging portion 24 of the key 10 has been shown, but the present invention is not limited to this. For example, the actuator 20 may be provided on a hammer that rotates in conjunction with the key 10 to give inertia to the key 10. That is, the actuator 20 may be provided on the displacement member, which is either the key 10 itself or a member that displaces with the movement of the key 10.

Although the lead is illustrated as a sounding body, the sounding body is not limited to this, and a plate-shaped sounding body such as a metal or wooden sounding body that produces an acoustic sound is also included in the sounding body.

Although the present invention has been described in detail based on the preferred embodiments thereof, the present invention is not limited to these specific embodiments, and various embodiments within the scope of the gist of the present invention are also included in the present invention. included.

13 lead (sounding body), 20 actuator, 21 base part (elastic member), 22 rotating body drive part, 22a connection part, 24 hanging (displacement member), 25, 25-1, 25-2, 25-3 regulation Part, 30 rotary pick (rotating body), 32 protrusion (driven part, sounding body driving part), P1 1st end

Claims (5)

With multiple keys
A plurality of sounding bodies that are provided corresponding to each of the plurality of keys and can be pronounced,
A plurality of rotating bodies provided corresponding to each of the plurality of sounding bodies, having a driven portion, and rotating around a rotation axis,
A sounding body driving unit provided on each of the plurality of rotating bodies and driving the corresponding sounding bodies to make a sound.
The first support portion and the second support portion support each of the displacement members, which are either the plurality of keys themselves or the members that are displaced with the movement of the keys, in a dual-holding state. Elastic member and
A rotating body drive unit provided so as to project from each of the elastic members between the first support portion and the second support portion.
Has a regulatory department,
At the time of contact between the rotating body driving unit and the driven unit in the key pressing stroke, the regulating unit regulates the rotational displacement of the rotating body driving unit in a direction corresponding to the reaction force received from the driven unit. The rotating body driving portion of the elastic member drives the driven portion of the corresponding rotating body to rotate the rotating body.
When the rotating body driving unit and the driven unit come into contact with each other in the key release stroke, the regulating unit does not regulate the rotational displacement of the rotating body driving unit in the direction corresponding to the reaction force received from the driven unit. A keyboard instrument characterized in that the rotating body driving unit escapes due to rotational displacement of the rotating body driving unit in a direction corresponding to a reaction force received from the driven unit. When the rotating body driving unit and the driven unit come into contact with each other in the key pressing process, the restricting unit presses the key in the longitudinal direction of the elastic member among the connecting portions between the rotating body driving unit and the elastic member. By making the displacement member in contact with the vicinity of the end on the side opposite to the side where the rotating body driving portion contacts the driven portion in the stroke, the direction corresponding to the reaction force received from the driven portion is obtained. The keyboard instrument according to claim 1, wherein the rotational displacement of the rotating body driving unit is regulated. The first or second aspect of the present invention, wherein the restricting portion is provided on the displacement member facing the elastic member on a side opposite to the protruding side of the rotating body driving portion of the elastic member. Keyboard instrument. The keyboard instrument according to claim 3, wherein the restricting unit is integrally formed with the displacement member. Claim 1 or 2 is characterized in that the regulating portion is formed integrally with the elastic member so as to face the displacement member on the side of the elastic member opposite to the protruding side of the rotating body driving portion. The keyboard instrument described in.

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