JPH0654086U - Electronic musical instrument keyboard device - Google Patents

Abstract

(57) [Abstract] [Purpose] The elastic member for key return engaged with the engaged part does not drop out when the key is pressed very strongly or there is a shock such as falling down, without increasing the number of parts. To obtain a keyboard device for an electronic musical instrument which can be prevented. [Structure] When a white key 1 which is rotatable around a key fulcrum member 2 provided on a keyboard frame 3 is pushed down, a hammer 4 is rotated around a hammer fulcrum member 5 by being pushed by an actuator 11 thereof. , The switch 15 is activated. The end of the leaf spring 6 engages with the recess 8 of the hammer 4 and the key fulcrum member 2, respectively. A rib 1 for preventing the leaf spring 6 from coming off is formed in the recess 9 of the white key 1 so as to face the leaf spring 6.
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Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a keyboard device for an electronic musical instrument, particularly an electronic piano.

[0002]

[Prior art]

 Conventionally, a keyboard frame, a key rotatably provided around a fulcrum provided on the keyboard frame, a hammer that is rotated by pushing down the key, and one end and the other end of the hammer and the key, respectively. In addition, a keyboard device for an electronic musical instrument is known, which is provided with a leaf spring that elastically deforms due to the swing of the key and the hammer and biases the key and the hammer in a direction opposite to the key pressing direction (Japanese Patent Laid-Open No. 2006-242242) 63-125992).

In this keyboard device, one end of the leaf spring is slidably engaged with the fulcrum of the key, and the other end is simply abutted against the fulcrum of the hammer, so that the leaf spring is elastically deformed. At this time, there was a risk that it would fall off and the hammer would fall off from its fulcrum.Therefore, a fall prevention member for the leaf spring was provided on the frame to regulate the leaf spring so that its curved deformation would not become excessive. Is being prevented.

[0004]

[Problems to be solved by the device]

 In the above-described conventional keyboard device for electronic musical instruments, since the fall prevention member for the leaf spring is provided separately from the keyboard frame, there is a problem that the number of parts increases and the cost becomes high.

The present invention has been made to solve the above problem, and provides a keyboard device for an electronic musical instrument, which can prevent the elastic member for key return from falling off without increasing the number of parts. Is the purpose.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a keyboard frame, a key that is rotatable about a fulcrum provided on the keyboard frame, and a key that has both ends engaged with engaged parts. In a keyboard device including a return elastic member, the key is integrally formed with an elastic member drop-out preventing portion that prevents the elastic member from falling off.

[0007]

[Action]

 When the key is pushed down, the hammer also rotates, and when the key is released, the spring elastic force of the key return elastic member returns to the initial position. Since the elastic member is opposed to the elastic member dropout portion such as a rib formed integrally with the key, both ends are engaged when the key is hit very strongly or there is a shock such as falling. It does not come off from the joint and fall off.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a white key which is rotatable about a key fulcrum member 2 fixed to a keyboard frame 3, and 4 is rotatable about a hammer fulcrum member 5 provided on the keyboard frame 3. A hammer (weight member) 6 is a leaf spring for urging the hammer 4 in a rotating direction of the hammer 4 due to gravity.

The leaf spring 6 has one end and the other end engaged with a locking projection 7 of the key fulcrum member 2 and a recess 8 engaging with the hammer fulcrum member 5 of the hammer 4, respectively, which are clearly shown in FIG. ing. As shown in FIG. 3, the white key 1 is provided with an elastic member provided at a position facing the leaf spring 6 when the white key 1 is rotatably provided on the keyboard frame 3 in a recess 9 that opens downward. A rib 10 as a member fall-off prevention portion and an actuator 11 for operating a switch and a hammer are provided by projecting integrally, and a fulcrum portion 13 of the key fulcrum member 2 is provided at a lower portion of both side plates 12 and 12 at a rear end portion. , 13 are provided with engaging recesses 14, 14.

In FIG. 1, when the white key 1 is pushed down, the hammer 4 is rotated by the actuator 11, and a key touch similar to that of an acoustic piano is obtained. With the rotation of the hammer 4, the musical tone forming switch 15 is activated. When the white key 1 is pushed down, the leaf spring 6 is curved and approaches the rib 10 of the white key 1. When the key is released, the hammer 4 quickly returns to the initial position due to its own weight and the spring elastic force of the leaf spring 6, and the white key 1 returns accordingly.

In FIG. 1, 16 is a coil spring for adjusting a key initial pressure, 17 is a hammer upper limit stop felt, 18 is a hammer lower limit stopper felt, 19 is a printed circuit board on which the switch 15 is mounted, and 20 is an upper limit of the white key 1. It is a stopper felt.

Since the keyboard device of the black key 21 is the same as that of the white key 1, the description thereof will be omitted.

[0014]

[Effect of device]

 Since the present invention has the configuration as described above, it is possible to prevent the elastic member for key return from falling off when there is a shock such as a very strong keystroke or a fall, without increasing the number of parts. Have.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention.

FIG. 2 is a perspective view of a key fulcrum member of the above embodiment.

FIG. 3 is a perspective view of the key of the above embodiment as viewed from the surface direction.

[Explanation of symbols]

1 White key 2 Key fulcrum member 3 Keyboard frame 4 Hammer 6 Leaf spring 7 Locking protrusion 8 Recess 10 Rib

Claims (1)

[Scope of utility model registration request] 1. A keyboard comprising a keyboard frame, a key rotatably provided around a fulcrum provided on the keyboard frame, and elastic members for returning a key whose both ends are engaged with engaged parts. A keyboard device for an electronic musical instrument, wherein the key is integrally formed with an elastic member drop-out prevention portion for preventing the elastic member from falling off.