JPH06149228A - Keyboard device - Google Patents

Abstract

PURPOSE:To prevent a key from falling from a keyboard frame without providing any dedicated fall stopping member and to detach only one of keys while other keys are fitted. CONSTITUTION:A fulcrum part 2 which is provided behind a key 1 is supported in a free swing state on the support part 4 of the keyboard frame 3 and a leaf spring 5 is interposed between the keyboard frame 3 and the back of the key 1; and a fall prevention member 6 for the key 1 is provided opposite a nearly center part of the leaf spring 5 behind the key 1 is provided and when the fulcrum part 2 is to move away from the support part 4, the leaf spring 5 increases in deflection quantity to abut on the fall prevention part 6 at its center part and is inhibited from moving, so that the key 1 is prevented from coming out of the keyboard frame 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard device used in various electronic keyboard musical instruments such as electronic organs.

[0002]

2. Description of the Related Art Conventionally, as a keyboard device of this type, as disclosed in, for example, Japanese Patent Laid-Open No. 62-275297, the rear end of the key is swingably supported by a keyboard frame, and A soft resin part is outserted on the outer periphery of the key guide piece formed by cutting and raising in front of the keyboard frame to form the key guide part, and both side surfaces of the key guide part are open on the lower side. There is one in which the lateral swing of the key is prevented by guiding the inner surfaces of both side walls of the V-shaped key.

A key return spring is engaged between the key and the keyboard frame to urge the keystroke portion side in front of the key upward, and an upper limit stopper made of felt or the like is provided on the lower surface of the keyboard frame. Attach the same lower limit stoppers to
The rocking range of the key is regulated by contacting the upper and lower limit stoppers with a stopper piece hung vertically on the key.

The fulcrum of the rear end of the key has a structure in which the inner surface of the fulcrum is engaged with the support part of the keyboard frame and oscillates. Therefore, when the key is pulled forward by the player. There is no problem because the fulcrum part of the key will be pressed against the support part, but when it is pushed backwards the key will fall out of the keyboard frame as it is. It was inserted between the back of the and the keyboard frame.

[0005]

However, such a conventional keyboard device requires a separate retaining member for preventing the key from falling off the keyboard frame, so that the number of parts is increased accordingly. There was a problem.

Further, in such a retaining member, since all the keys of a keyboard having a large number of keys arranged side by side are commonly retained by one part, among the many keys of the keyboard. Even if you try to remove any one of them for some reason, you must remove the retaining member so that all the keys can be removed. Was troublesome.

The present invention has been made in view of the above problems, and it is possible to prevent the key from falling off without providing a dedicated retaining member for preventing the key from falling off the keyboard frame. An object of the present invention is to provide a keyboard device capable of removing only the intended key even if one of the plurality of keys is to be removed for some reason.

[0008]

In order to achieve the above object, the present invention provides a key, a key support member for swingably supporting a fulcrum portion provided on the key by a support portion, and a key support member for the key support member. One end is supported and the other end is supported by the key, and a biasing means by a spring for biasing the fulcrum part of the key in a direction of pressingly contacting the supporting part of the key supporting member is provided, and the key biasing means A keyboard device is configured by providing a key removal preventing portion for the key support member at a portion facing the central portion.

[0009]

According to the keyboard device constructed as described above, the portion facing the substantially central portion of the biasing means of the key does not have to be provided with a dedicated retaining member for preventing the key from falling out of the keyboard frame. Since the key is equipped with a lock-out prevention part, when the key is moved in the direction in which the fulcrum part moves away from the support part, the biasing means whose one end is supported by the key moves with the key. And is deformed, and at that time, the substantially central portion of the urging means comes into contact with the key removal prevention portion and its movement is immediately blocked.
The key is prevented from coming off the key support member.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view of a keyboard device showing an embodiment of the present invention, and FIG. 2 is an external perspective view of the same.

This keyboard device includes a key frame 3 which is a key support member for swingably supporting a key 1 and a fulcrum part 2 provided at the rear of the key 1 with a support part 4, and one end of the keyboard frame 3. 1 is supported, and the other end is supported rearward of the key 1 on the right side in FIG. 1, and is a biasing means for biasing the fulcrum portion 2 of the key 1 against the support portion 4 of the keyboard frame 3. A leaf spring 5 is provided, and a slip-out prevention portion 6 that prevents the key 1 from slipping out of the keyboard frame 3 is provided at a portion of the leaf spring 5 that is located behind the key 1 and that faces the central portion of the leaf spring 5.

As shown in FIG. 2, the key 1 is formed by integrally molding the longitudinal cross-sectional shape of all the parts except for the rear part in a U-shape with the lower surface side open, and using a resin material or the like. The fulcrum portion 2 formed in a hemispherical shape is swingably supported by a support portion 4 integrally fixed to a keyboard frame 3 made of sheet metal shown in FIG. The rear side of the key 1 is in a blow-through state in which both the upper surface and the lower surface are open, and the slip-out prevention portion 6 is bridged between the inner surfaces of both side walls of that portion to be integrated in an inclined state in which the front is lowered. It is provided by molding.

L-shaped stopper pieces 1a, 1a are vertically provided on both side walls of the front portion (left side in FIG. 1) of the key 1,
The inner wall surface of each stopper piece 1a is formed in an L shape and is fixed to the keyboard frame 3 with a screw 9, and the outer peripheral portion thereof is made of a sound absorbing material such as a soft elastomer or a foam material and outsert-processed to form an integrated key. The lateral movement of the key 1 (in the front and rear directions in FIG. 1) is prevented by slidingly contacting both side surfaces of the guide 11.

Further, when the upper limit stopper 12 and the lower limit stopper 13 are attached to the lower surface of the key guide 11 and the upper surface of the stepped portion 2a formed at the front end of the keyboard frame 3, respectively, when the front side of the key 1 is depressed. By contacting the lower surfaces of the stopper pieces 1a, 1a with the lower limit stopper 13, the lower limit position is restricted, and when the key is returned, the stopper pieces 1a, 1a,
The upper surface of the projecting portion of 1a contacts the upper limit stopper 12 (see FIG.
The return position is regulated by the above condition. The return of the key 1 to the position shown in FIG. 1 is performed by the urging force of the leaf spring 5.

As shown in FIG. 2, the leaf spring 5 is formed with a notch groove 5a at one end and a notch groove 5b at the other end, and one of the notch grooves 5a is shown in FIG. As shown in the figure, the keyboard frame 3 is inserted into the locking hole 14 formed by press-cutting and raised up to the groove end and locked, and the notch groove 5b on the other end side is directed inward toward the center of the rear inner surface of the key 1. The spring is engaged with the ridge 15 protruding with a constant width in a bent state, and the end portions 5c on both sides of the cutout groove 5b are connected to the ridge 15.
The neck portion of the engaging projection 16 that is projected further inward from the upper part of the is engaged.

Therefore, the key 1 is urged rightward in FIG. 1 by the urging force of the leaf spring 5 so that the fulcrum portion 2 is pressed against the support portion 4 of the keyboard frame 3 and the left front portion is raised. The key return force biased to the side is also given by the leaf spring 5, and is kept at the upper limit position in FIG. 1 in a normal state.

On the other hand, a board 17 is fixed to the lower front surface of the keyboard frame 3 with screws, for example.
A known contact rubber member 18 having a bowl-shaped bulge corresponding to each key is arranged on the upper surface of the contact rubber member 1.
A musical sound is generated by elastically deforming 8 and closing the key switch. This key 1 is
That is, for example, one octave (12
The number of pieces that make up each piece is arranged.

When assembling this keyboard device, after the fulcrum portion 2 of the key 1 is supported by the support portion 4 of the keyboard frame 3 as shown in FIG. 1, the leaf spring 5 is prevented from coming off from one end side. It is inserted into the key 1 at an angle through the gap between the and the engaging projection 16 and one end thereof is locked in the locking hole 14 of the keyboard frame 3.

Next, the leaf spring 5 is pushed down at the other end side so as to bend so that the central portion of the spring bulges upward in FIG. 1, and the pushed down end portion 5c on the other end side (FIG. 2). (Refer to FIG. 1) so as to cross over the engagement protrusion 16 and engage it with the neck portion of the engagement protrusion 16 (state of FIG. 1). In the mounted state of the leaf spring 5, as shown in FIG. 3, a gap S is formed in advance between the belly portion 5d at the center of the spring and the lower surface of the slip-out prevention portion 6, and the gap S is It is determined in consideration of a margin required for the assembling of the leaf spring 5 at the mounting position shown in the figure and a bending amount of the leaf spring 5 at the time of playing the key 1.

In the keyboard apparatus constructed as described above, when the key 1 is pushed to the rear side on the right side in FIG. 1 having the supporting portion 4, the fulcrum portion 2 of the key 1 is pushed to the supporting portion 4 of the keyboard frame 3. Since it does not move any further, it does not fall off the keyboard frame 3.

When the key 1 is pulled to the player side on the left side in the figure, the key 1 moves in the same direction, so that the side of the leaf spring 5 that engages with the engaging projection 16 moves in the same direction. The amount of bending of the leaf spring 5 increases, the gap S shown in FIG. 3 disappears, and the abdominal portion 5d of the leaf spring comes into contact with the lower surface of the slip-out preventing portion 6.

In this case, the further movement of the key 1 to the left (player side) is prevented, so that the engaging projection 16
Alternatively, the key 1 does not move unless the leaf spring 5 is intentionally destroyed. Since the fitting depth H of the fulcrum portion 2 of the key shown in FIG. 1 with respect to the support portion 4 is made larger than the possible displacement amount of the key 1 to the player side, the leaf spring 5 is attached. In this state, the fulcrum portion 2 is always fitted to the support portion 4, so that the key 1 does not fall off the keyboard frame 3.

On the other hand, when it is desired to remove only one specific key from the keys 1 arranged in the keyboard frame 3 from the keyboard frame 3, the leaf spring 5 corresponding to the key 1 is attached to one end of the leaf spring 5 with a flat head screwdriver or the like. It can be easily removed by disengaging it from the engaging projection 16 by hooking it, pulling out the leaf spring 5 and pulling the key 1 toward the player.

As described above, in the keyboard device according to this embodiment, each key 1 is removed from the keyboard frame 3 when it is removed.
In addition, since it is prevented by the slip-out preventing portion 6 formed by integral molding, the number of parts can be reduced by the amount that a dedicated slip-out preventing member is not required. In addition, it is convenient that only one of the plurality of keys can be removed while the other keys are still attached.

FIG. 4 shows another embodiment of the present invention, in which parts corresponding to those in FIG. 1 are designated by the same reference numerals. Compared with the embodiment shown in FIG. 1, this keyboard device has a plate-like shape further behind the slip-out preventing portion 6 of the key 1 and, like the slip-out preventing portion 6, between the opposing side surfaces of the inner wall surface of the U-shaped section of the key 1. The guide portion 21 is formed by being integrally molded so as to be inclined, and its disposition position is lower than the slip-off preventing portion 6, and the front end side is the slip-out preventing portion 6.
By aligning with or slightly rearward of the rear end side so as not to undercut in the die cutting direction (vertical direction in FIG. 4), the workability at the time of molding is improved.

According to this embodiment, when the leaf spring 5 is mounted, the guide portion 21 guides the leaf spring 5 inserted into the key 1 as shown by the phantom line into the locking hole 14 of the keyboard frame 3. , When the one end of the leaf spring 5 on the rear side of the key is bent to engage with the neck portion of the engaging protrusion 16, the bent side of the spring is reversed so as not to be opposite to the direction shown by the solid line in FIG. Also plays a role of preventing.

FIG. 5 shows still another embodiment of the present invention, in which parts corresponding to those in FIG. 1 are designated by the same reference numerals. In this keyboard device, the orientation of the leaf spring 5 when mounted is reversed from that of the embodiment of FIGS.
The guide at the time of insertion of the key is formed by a plate-shaped guide portion 21 'integrally formed between the opposing side surfaces of the inner wall surface of the U-shaped section of the key 1, and a guide piece 24 fixed on the keyboard frame 3 by an outsert. At the same time, the spring locking member 23 is brought close to the rear side of the guide piece 24 and fixed by the outsert, and the guide piece 24 has a friction coefficient so that the upper end of the guide piece 24 can easily slip. Is made of a material that is small and has good sliding properties.

Further, the structure of the fulcrum portion is changed to form an opening 3a in the rear horizontal plane of the keyboard frame 3, and the rear end of the key 1 is projected downward to form a fulcrum portion 22 there, and the leaf spring 5 is formed. Locking groove 2 with one end formed on the inner surface of the vertical wall of the key 1
5, when the other end is engaged with the spring locking member 23, the fulcrum part 22 becomes the left end edge of the opening 3a (becomes a support part).
The key 1 is pressed by the urging force of the leaf spring 5, and the front of the key 1 (the left side in FIG. 5) is oscillated about the fulcrum portion 22 and urged upward.

Even in this case, when the key 1 is pushed to the right side in FIG. 5, the amount of bending of the leaf spring 5 increases, and the abdomen 5d comes into contact with the slip-out preventing portion 6'and further movement is prevented. So the key 1
It is possible to prevent the keyboard frame 3 from coming off.

The supporting portion 34 having a shape as shown in FIG.
The keyboard frame 3 is formed on the key frame 1, and the recessed fulcrum portion 32 is formed on the key 1 corresponding to the keyboard frame 3, and the leaf springs 5 are C-shaped on the spring engaging portions 31 and 35 formed on the keyboard frame 3 and the key 1, respectively. It is possible to prevent the key 1 from coming off the keyboard frame 3 even when the key 1 is integrally mounted on the key 1 so as to be bent in an arc shape or an arc shape and mounted so as to face the abdomen 5d at the substantially center thereof.

FIG. 7 is a sectional view showing an embodiment in which a leaf spring is arranged at a position where a feeling of friction is given when a key is hit. In this embodiment, the leaf spring 5 is mounted between a locking portion 45 formed on a vertical wall adjacent to the fulcrum portion 42 of the key 1 and a spring locking member 47 formed on the keyboard frame 3, and the biasing force thereof is applied. Support point 4
2 is pressed against a support portion 44 provided integrally with the keyboard frame 3 with a predetermined pressure contact force so that an appropriate friction feeling can be obtained when the key 1 is hit.

At a portion facing the center of the leaf spring 5, a slip-out preventing portion 46 is formed integrally with the key 1, and the key 1 is shown in FIG.
When the plate spring 5 is moved to the left side, the amount of bending of the leaf spring 5 increases and the abdomen 5d contacts the lower surface of the slip-out preventing portion 46, so that the key 1 is prevented from slipping out of the keyboard frame 3.

In this embodiment, the key 1 is returned to its original position after the key is pressed after the deformation of the bowl-shaped bulging portion of the contact rubber member 18 as shown in FIG. 1, for example. 7, the rear end of the key 1 is extended rearward as shown by the phantom line in FIG. 7, and a weight portion 45 is provided so that the weight portion 45 swings in the arrow A direction by its own weight. Furthermore, a coil spring or a leaf spring dedicated to key recovery is provided.

Further, in the case of this embodiment and the embodiment described with reference to FIG. 6, even if a coil spring in which a linear spring material is spirally wound is used instead of the leaf spring 5, the same effect is obtained. Can play. In this case, if the coil spring is positioned so that the winding start and winding end of both ends are slightly eccentric from the center of the circle in the same direction, the center of the spring in the longitudinal direction corresponds to the eccentric direction when the coil spring is compressed. Since it becomes easy to bend in the direction of
By setting it to the 6 side, the coil spring can be easily attached.

Further, in each of the above-mentioned embodiments, the case where the support portion is applied to the keyboard having the structure in which the supporting portion abuts on the fulcrum portion near the rear end of the key has been described. Can also be applied to. Furthermore, in each of the above-described embodiments, the case where the present invention is applied to the keyboard device of the electronic keyboard musical instrument has been described, but the present invention is not limited to this, and the present invention can also be applied to a keyboard device such as a piano touch.

[0036]

As described above, according to the present invention, when the key is moved in the direction in which the fulcrum part moves away from the support part, the substantially central part of the biasing means by the spring comes into contact with the key removal preventing part. Therefore, the key can be prevented from coming off the key supporting member without providing a dedicated retaining member. Therefore, the number of parts can be reduced by the amount that does not require a dedicated retaining member.

If the biasing means is removed from the key,
When only one of the plurality of keys is to be removed for some reason, it is possible to remove only the key from which the biasing means has been removed from the key support member and leave the other keys in the attached state. It is convenient for

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a keyboard device showing an embodiment of the present invention.

FIG. 2 is a perspective view of the same.

FIG. 3 is a schematic diagram for explaining how a gap S is formed between the central portion of the leaf spring and the lower surface of the slip-out prevention portion when the leaf spring of FIG. 1 is mounted.

FIG. 4 is a sectional view showing only a main part of another embodiment of the present invention.

FIG. 5 is a sectional view showing only a main part of still another embodiment of the present invention.

FIG. 6 is a sectional view partially showing an example of a case where a leaf spring is bent and mounted in a C shape between a key and a keyboard frame.

FIG. 7 is a cross-sectional view showing an embodiment in which a leaf spring is arranged at a position that gives a feeling of friction when a key is pressed.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Key, 2, 22, 32, 42 ... Support point part, 3 ... Keyboard frame (key support member), 4, 34, 44 ... Support part, 5 ... Leaf spring (biasing means), 5d ... Abdominal part, 6, 6 ', 36, 46
... Prevention prevention part, 21,21 '... Guide part, guide piece ... 2
Four

Claims (1)

[Claims] 1. A key, a key support member for swingably supporting a fulcrum portion provided on the key by a support portion, one end supported by the key support member, and the other end supported by the key. An urging means by a spring for urging the fulcrum portion of the key in a direction of pressingly contacting the supporting portion of the key supporting member is provided, and the key support is provided at a portion of the key facing the substantially central portion of the urging means. A keyboard device comprising a member for preventing the key from coming off the member.