JP3550669B2 - Keyboard device - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device for an electronic musical instrument, and more particularly to an improvement in a key pressing force detecting means for controlling a tone.
[0002]
[Prior art]
In an electronic keyboard instrument, in order to enrich the expressive power of performance, a key pressing component in the left and right direction is detected when a key is pressed, and for example, tone, volume, pitch or various musical sounds such as reverb, pan, vibrato, etc. are detected based on the pressure information. There are known techniques for controlling and expanding the range of performance and enriching expressive power. In this case, the key pressing force component in the left-right direction is detected by detecting the displacement of the elastic member that is elastically deformed in the left-right direction by the key pressing force component. The elastic displacement of this elastic member in the left-right direction is very small. This is because a large displacement is not suitable for playing and gives stress to the key structure, which is not preferable, and a large displacement may cause contact between adjacent keys and hinder smooth playing.
[0003]
[Problems to be solved by the invention]
However, when an excessive left-right force acts on the elastic member, the elastic member may be plastically deformed and may not be able to recover.
[0004]
Further, as described above, in order to detect a delicate displacement in the left-right direction, the processing accuracy, mounting accuracy, assembly accuracy, and the like of the detecting means must be extremely strict. In this case, in order to increase the precision, the key structure must be made precise, which leads to an increase in cost, and the precise structure is vulnerable to stress. Here, if a structure resistant to stress is used, the structure becomes strong and heavy. When the weight increases, a vicious circle occurs in which the inertia increases and the playability decreases.
[0005]
The present invention has been made in view of the above-mentioned disadvantages of the related art, and reliably protects a detection mechanism when an excessive force is applied. It is an object of the present invention to provide a keyboard device that can be assembled into a keyboard.
[0006]
[Means for Solving the Problems]
To achieve the above object, according to the present invention, in the invention according to claim 1, a plurality of keys, a fixed support frame piece fixed to the musical instrument main body , and a fixed relationship with the fixed support frame piece are held. In a keyboard device comprising a fixed member and a rocking support frame piece that swings left and right by a force of a left-right component of a key pressing force with respect to the musical instrument main body, a part of the fixed member is formed of a rocking support frame piece . A stopper member for restricting left and right movement is formed, and a stopper member whose swingable range in the left-right direction is regulated is fixed to the swing support frame piece , and the stopper member is moved relative to the swing support frame piece. to allow position adjustment in the horizontal direction, the one end of the fixed support frame plate spring is elastically deformed in the lateral direction to pieces is fixed, said pivot support frame pieces is fixed to the other end of the leaf spring, the leaf spring Fix the lateral sensor support member, and Providing a keyboard apparatus characterized in that a lateral displacement detecting sensor wood.
[0007]
Further, in the invention according to claim 2, a hole is formed in the fixing member, and the stopper member has a projection, and the projection is inserted into the hole so as to be swingable left and right, and is swingable in the left and right direction. It is characterized in that it is configured to regulate the range.
[0008]
[Action]
In the invention according to claim 1, the fixing member is substantially fixed to the musical instrument main body. The swing support frame piece swings left and right with respect to the instrument body. A stopper formed on the fixing member regulates a swingable range in the left-right direction of the member to be stopped fixed to the swing support frame piece . This prevents a large displacement when an excessive force is applied to the swing support frame piece . It said the stopper member is positioned adjustably mounted to swing the support frame pieces. As a result, the stopper member can be fixed at the center position of the left and right swing range at the time of assembling, and the left and right can be fixed without making the processing accuracy and assembling accuracy of the elastic displacement detecting members such as the fixing member and the swinging support frame piece. The swing margin can be made uniform.
[0009]
In the invention according to claim 2, the stopper portion of the fixing member is formed as a hole having a predetermined length in the left-right direction, and the stopped portion has a protrusion inserted into the hole. The protrusion is displaced in the left-right direction within the range of the hole. Thereby, the swingable range of the swinging support frame piece in the left-right direction can be regulated with a simple configuration.
[0010]
【Example】
FIG. 1 is a partial cross-sectional side view showing the entire configuration of a keyboard device according to an embodiment of the present invention, and FIG. 2 is a partial plan view as viewed from above. The key 1 is swingably attached to a key frame 2 serving as a key support member. The key frame 2 is fixed to a musical instrument main body (shelf plate) 3. The key 1 is attached by inserting and locking the key fulcrum 5 at the rear end thereof into the inner edge of the fulcrum mounting hole 4 provided on the key frame 2. A return spring 6 is provided at the rear end of the key 1 to always urge the key 1 upward and return the pressed key to its original position. One end 40 of the return spring 6 is engaged with the inner surface locking portion of the key 1, and the other end 41 is retained in a locking recess 42 provided in the key frame 2. Attached to give.
[0011]
On the front end side of the key 1, an actuator 7 for applying a key pressing force to a key pressing force detecting means described later is formed integrally with the key 1. The actuator 7 is provided with a notch 8. The lower end surface 9 of the actuator 7 forms a stopper contact surface that contacts the lower limit stopper 10 at the lower limit position of the key stroke. In the notch 8, a free end 11e of an elastic piece 11a of an elastic member 11, which will be described later, for detecting a key pressing force in a vertical direction (vertical direction) which is a key pressing direction is inserted. The figure shows a state in which the key 1 is not pressed, that is, the upper limit position (initial position) of the key pressing stroke. In this non-key pressed state, the upper surface of the free end 11 e of the elastic member 11 (elastic piece 11 a) and the notch 8 A slight play a is provided between the upper edge 43 and the upper edge 43. Due to this play, when the key pressing operation is started, there is a slight interval before the actuator 7 acts on the key pressing force detecting elastic member 11 (elastic piece 11a) to receive the reaction force. The feeling of pressing is transmitted to the finger, and the touch feeling of the key press is improved.
[0012]
The key pressing stroke is from the state of the illustrated initial position until the key 1 rotates around the key fulcrum 5 at the rear end, the front end descends, and the lower end surface 9 of the actuator 7 contacts the lower limit stopper 10. The range is indicated by b in FIG.
[0013]
The lower limit stopper 10 is fixed along the longitudinal direction of a fixed support frame piece 12 in the form of a square pipe made of, for example, an extruded aluminum body fixed to the instrument body (shelf plate) 3 (see FIG. 2). One end of an elastic member 15 composed of a leaf spring is fixed to the fixed support frame piece 12 via an angle-shaped connecting member 13. The other end of the elastic member 15 is connected laterally swing support frame pieces 16 also through the angle-shaped coupling member 14. Like the fixed support frame piece 12, the lateral swing support frame piece 16 has a square pipe shape made of, for example, an extruded aluminum product. The elastic member 15 is for detecting the key depression force component in the lateral direction (horizontal direction), elastically deformed laterally longitudinally so as not to displacement (vertical direction) two support frame pieces 12, 16 Interposed in between. With this configuration, the swing support frame piece 16 swings in the horizontal direction (left / right direction) in accordance with the elastic deformation of the elastic member 15 and does not substantially displace in the vertical direction (up / down direction) and has a fixed fixed position level. (Actually, it is slightly displaced within the range of the elastic deformation of the elastic member 15 in the vertical direction). The swing direction of the swing support frame piece 16 is indicated by an arrow A in FIG.
[0014]
As shown in FIG. 2, a lateral sensor support member 21 is fixed to a side surface of the elastic member 15. An optical displacement detection sensor 20 is provided on the lateral sensor support member 21 to detect a displacement amount due to elastic deformation of the elastic member 15 in the swing direction A. It should be noted that the sensor 20 serving as the lateral displacement detecting means and its support member 21 are not shown in FIG.
[0015]
A key guide support member 17 is fixed to the lateral swing support frame piece 16. A key guide 18 is fixed on the key guide support member 17 corresponding to each key. The key guides 18 slide in contact with both sides of each key inner surface to guide the keys vertically during a key pressing stroke. The key pressing force component in the left-right direction is transmitted to the key guide support member 17 via the key guide 18 and further transmitted to the lateral swing support frame piece 16. Therefore, when a left-right force is applied to the key when the key is pressed, the force is transmitted to the lateral swing supporting frame piece 16 via the key guide 18, and the elastic member 15 is elastically deformed in the lateral direction to support the swing. frame piece 16 is swung as indicated by an arrow a (FIG. 2). This swing displacement is detected by the sensor 20 on the lateral sensor support member 21.
[0016]
FIGS. 3A and 3B are diagrams showing a main part configuration of the embodiment of the present invention applied to the electronic keyboard instrument having the above configuration, wherein FIG. 3A is a plan view, and FIG. 3B is a longitudinal sectional view (XX sectional view). It is. FIG. 4 is a perspective view of the main part.
[0017]
In the electronic keyboard instrument having the above configuration, in the present invention, a fixing member 30 is attached to an end of the fixed support frame piece 12 as shown in FIG. A stopper member 31 is attached to the swing support frame piece 16 corresponding to the fixing member 30. Note that the fixing member 30 and the member to be stopped 31 are shown by dashed lines in FIGS. The fixed member 30 is substantially fixed and held to the musical instrument main body (shelf plate) 3 via the fixed support frame piece 12. A hole 32 having a predetermined length is formed in the fixing member 30 in the left-right swing direction of the swing support frame piece 16 (indicated by an arrow A in FIG. 3A). The holes 32 constitutes a stopper portion in the claims 1, in correspondence with the hole 32, the projection 33 is formed on the stopper member 31 of the swing support frame piece 16 side. The protrusion 33 is inserted to be swingable in the lateral direction (oscillation direction A of the swing support frame piece 16) in the hole 32 of the fixing member 30. Thereby, the movement of the projection 33 in the left-right direction is restricted within the range of the hole 32, and accordingly, the range in which the swing support frame piece 16 can swing left and right is regulated.
[0018]
Such the stopper member 31, as shown in FIG. 4, which is screwed into the screw hole 35 of the swing support frame piece 16 is fixed by a screw 36. In this case, the screw 36 fixes the stopper member 31 through the long hole 34 provided in the stopper member 31 in the left-right direction. Therefore, when the stopper member 31 is assembled and fixed, the position of the stopper member 31 in the left-right direction can be adjusted within the length of the elongated hole 34. By adjusting the position of the member to be stopped 31 as shown by the arrow K in FIG. 5, the projection 33 can be arranged at the center position in the hole 32 of the fixing member 30. Thereby, the left and right swing margins d1 and d2 in the left-right swing direction can be made equal.
[0019]
【The invention's effect】
As described above, in the keyboard device according to the first aspect of the present invention, the stopper means (fixing member and stopper member) for the key pressing force component detecting means (elastic member and rocking support frame piece ) in the left-right direction is provided. because it allows adjusting the position of the stopper means provided with, when the impact is applied or dropped other excessive force, the elastic member is plastically deformed or swing supporting frame pieces other member displacement and damage detection Is prevented from occurring.
[0020]
Further, since the position can be easily adjusted at the time of assembling the stopper means, the member to be stopped can be fixed at the center position of the left and right swing range, and the elastic member for detecting the elastic displacement of the fixed member and the swing support frame piece is provided. The left and right swing margins can be made uniform without making the processing accuracy and assembly accuracy of the members strict, thereby improving the assembly workability.
[0021]
In the keyboard device according to the second aspect of the present invention, a hole is provided in the fixing member, and the projection of the member to be stopped is inserted into this hole so as to be swingable in the left-right direction. The swingable range of the left-right swing support frame piece can be regulated, and the assembling work can be facilitated.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional side view of a keyboard device according to an embodiment of the present invention.
FIG. 2 is a top view of the keyboard device of FIG. 1;
FIG. 3 is an explanatory diagram of a configuration of a stopper unit according to the embodiment of the present invention.
4 is an exploded perspective view of the stopper means of FIG.
FIG. 5 is an operation explanatory view of the stopper means of FIG. 3;
[Explanation of symbols]
1: key, 2: key frame, 3: shelf, 5: key fulcrum, 8: notch, 11: elastic member for detecting vertical key pressing force, 11a: elastic piece, 12: fixed support frame piece , 15 : the left-right direction key depression force detecting elastic member, 16: left-right reciprocating supporting frame pieces, 17: key guide support member, 18: key guides, 19: vertical sensor support member, 20: displacement detecting sensor, 30: fixed member, 31: the stopper member, 32: hole (stopper portion), 33: protrusion of the strike Tsu path member, 34: long hole.

Claims (2)

A plurality of keys, a fixed support frame piece fixed to the instrument body , a fixed member held in a fixed relationship to the fixed support frame piece, and a force of a left-right component of a key pressing force on the instrument body. In a keyboard device provided with a swing support frame piece that swings right and left, a part of the fixing member forms a stopper portion that regulates the left and right movement of the swing support frame piece , and a swingable range in the left and right direction. Is fixed to the swinging support frame piece , the stoppered member is capable of adjusting the position in the left-right direction with respect to the swinging support frame piece ,
One end of the leaf spring is elastically deformed in the lateral direction to the fixed support frame piece is fixed,
The swing support frame piece is fixed to the other end side of the leaf spring,
A keyboard device comprising a lateral sensor support member fixed to the leaf spring, and a lateral displacement detection sensor provided on the sensor support member. A hole is formed in the fixing member, and the member to be stopped has a projection, and the projection is inserted into the hole so as to be able to swing left and right and regulates a swingable range in the left and right direction. The keyboard device according to claim 1, wherein:

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