JP2000242272A - Keyboard instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smooth the opening and closing of a fallboard and to simplify the structure. SOLUTION: Arms 3 of this keyboard instrument are provided with guide plates 17 and 18. Both end sides of the fallboard 14 are provided with leaf springs 19 pressed to the arms 3. At the time of opening and closing of the fallboard 14, the fallboard 14 is guided at the rear surface by the guide plates 17 and 18 and the side ends thereof are guided via the leaf springs 19. Accordingly, the direct contact of the fallboard 14 with the arms 3 at the time of opening and closing is prevented and the fallboard 14 is smoothly moved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a keyboard instrument,
In particular, it relates to a keyboard instrument having a keyboard lid that can be opened and closed smoothly.

[0002]

2. Description of the Related Art A keyboard cover of a keyboard instrument such as an electronic piano or an electronic organ adopts the following opening / closing type.
FIG. 8 is a sectional view of an electronic musical instrument showing an example of the structure of a conventional keyboard cover, and FIG. 9 is a sectional view of a main part. In both figures, the arm 100 of the electronic musical instrument has a guide rail 102 for guiding the front end of the keyboard cover 101, that is, the end on the side close to the player, and the rear end of the keyboard cover 101, that is, the side far from the player. Rack 103 is fixed. A guide rail 104 for guiding the keyboard cover 101 in cooperation with the rack 103 is provided at a position offset from the rack 103 toward the arm 100.

A handle 105 made of a metal material such as aluminum is provided at the front end of the keyboard cover 101, and a pin 106 extending horizontally toward the arm 100 is provided near the lower end of the vertical portion of the handle 105. Have been. The pin 106 is engaged with the guide rail 102 to
1 to guide the front end.

An auxiliary fitting 107 is provided at the rear end of the keyboard cover 101.
The auxiliary fitting 107 is provided with a rotatable shaft 108 extending horizontally toward the arm 100, and the shaft 108 is provided with a pinion 109 and a roller 110 (FIG. 9). Pinion 109
Meshes with the rack 103, and the rollers 110 engage the guide rails 104 to guide the rear end of the keyboard cover 101, respectively.

According to this configuration, the skew of the keyboard cover 101 is regulated by the engagement between the pinion 109 and the rack 103. Therefore, if a force is applied to the keyboard instrument with the handle 105 of the keyboard cover 101 in the front-rear direction, the keyboard The lid 101 is opened and closed smoothly.

FIG. 10 is a sectional view of an electronic musical instrument showing another example of the structure of the conventional keyboard lid. In the figure, a front end guide plate 111 for guiding the front end of the keyboard cover 101 and a rear end guide plate 112 for guiding the rear end of the keyboard cover 101 are fixed to the arm 100 of the electronic musical instrument.

A handle 1 provided at the front end of the keyboard cover 101
05 are covered with resin covers 113 on both ends.
When the cover 01 is opened and closed, the resin cover 113 slides on the upper end surface of the front end guide plate 111. On the other hand, the rear end of the keyboard cover 101 slides on the end surface on the rear end guide plate 112. At the rear end of the keyboard cover 101, a stopper 115 is provided so that the keyboard cover 101 does not protrude beyond a predetermined amount in front of the keyboard instrument. The front end position of the opening / closing stroke of the keyboard cover 101 is regulated.

[0008]

8 and 9, since the skew is prevented by engagement of the rack and the pinion, the keyboard lid can be opened and closed smoothly even if a force is applied to any part of the handle. . By the way, the rack 103 and the guide rail 10
Since the number of parts is increased if the 4 is manufactured separately, it is desirable to integrally mold them. However, when the rack 103 and the guide rail 104 are integrally formed, the size (length) is fixed, so that the rack 103 and the guide rail 104 are dedicated parts for a specific model, and cannot be reused. For this reason, there is a problem that it can be adopted only for high-end models.

On the other hand, the keyboard cover shown in FIG. 10 has the advantage of a small number of parts and a simple structure. However, for example, if the cover is to be opened and closed with only one of the left and right ends, the cover is inclined. May run. Then, the corner of the keyboard lid is caught by the arm bar, and the smooth movement cannot be performed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a keyboard instrument which solves the above-mentioned problems and simplifies the structure of a keyboard lid and satisfies both smoothness of opening and closing operations.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems and to achieve the object, the present invention relates to a keyboard musical instrument having a keyboard cover which is opened and closed by moving in the front-rear direction of a musical instrument body. A first guide member for guiding the left and right ends, and a second guide member for guiding the lower surfaces of the left and right ends of the keyboard cover.
A guide member, and an elastic member provided on the keyboard cover so as to contact the first guide member at at least two points, wherein the elastic means has a curvature in contact with the first guide member. It is also characterized in that it comprises a leaf spring having a portion, or a spring and a sphere pressed by the spring so as to abut the first guide member. Further, the present invention provides the first
It is also characterized in that the guide member is on the side of the arm and the second guide is a plate member provided on the side of the arm.

According to the above feature, when the keyboard cover is opened and closed, the keyboard cover is guided by the second guide member, and the left and right ends thereof come into contact with the first guide member (or arm bar) via the elastic means. You will be guided while doing. Therefore, even if a biased force is applied when the cover is opened and closed and skewing is likely to occur, corners and the like of the cover may be caught on the first guide member (or arm bar) because of the elastic means. And can move smoothly.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view of an electronic piano according to one embodiment of the present invention. In FIG. 1, an electronic piano main body 1 includes a bottom plate 2, a brace 3, a back plate 4, and a mouth stick 5 vertically assembled to the bottom plate 2, and a top mounted on the brace 3 and the back plate 4. It is a box composed of the face plate 6. A side plate 7 for supporting the main body 1 is fixed to the bottom plate 2. The side plate 7 and the arm 3 are provided as a left and right pair.

A keyboard 8 and a fulcrum 9 for swingably supporting the keyboard 8 are provided inside the main body 1, and a keyboard chassis 10 for supporting the fulcrum 9 is provided. In addition to the fulcrum 9, a spring for urging the keyboard 8 upward, a switch for detecting operation of the keyboard 8, and the like (both not shown) are attached to the keyboard chassis 10. The keyboard chassis 10 is fixed to the bottom plate 2. Further, the speaker 11 is attached to the bottom plate 2 facing downward. A music stand 12 is provided on the upper part of the main body 1, that is, on the upper surface plate 6. Music stand 1
2 has a foldable stand 13 on the back. The main unit 1 has a speaker 1 in response to the operation of the keyboard 8.
Although a computer or an electric circuit for generating a sound is provided at 1, the illustration is omitted because it is not a main part of the present invention.

A keyboard cover 14 is provided above the keyboard 8. The keyboard cover 14 is engaged with the arm 3 as follows so that it can be retracted to the back of the main body 1 during performance. First, the configuration of the keyboard cover 14 will be described. A handle 15 is provided at the front end of the keyboard cover 14, that is, at the end near the mouthpiece 5. The handle 15 is desirably formed of a metal material such as aluminum. Resin covers 16 are provided on both left and right edges of the hanging portion of the handle 15.

On the other hand, a front guide portion 17 for guiding the resin cover 16 and a rear guide plate 18 for guiding the rear end portion of the keyboard cover 14 are fixed to the arm 3. . The resin cover 16 is slid on the front guide plate 17, and the rear end of the keyboard cover 14 is
The keyboard cover 14 is opened and closed by sliding upward.

Further, in the present embodiment, elastic members are provided on both left and right end portions of the keyboard cover 14, and the elastic members are slid on the arms 3 to guide the side of the keyboard cover 14. The side guide means of the keyboard cover 14 will be described. 2 is a plan view of the keyboard cover 14, and FIG. 3 is a rear view of a main part of the keyboard cover.

In these figures, two leaf springs 19 are provided on the left and right side surfaces of the keyboard lid 14, respectively.
0 is attached. The free end side of the leaf spring 19, that is, the portion in contact with the arm 3 is formed in an arc shape, so that good slidability with the arm 3 is maintained. The shape and the number of the leaf springs 19 are not limited to this example, and various modifications are possible. For example, the number is not limited to two, and the point is that it is sufficient that at least two contact positions with the arms 3 are provided in the opening and closing direction of the keyboard cover 14.

FIG. 4 shows a keyboard cover 14 showing a modification of the leaf spring.
FIG. In the figure, one leaf spring 19 is provided on each of the left and right end surfaces of the keyboard cover 14, and arc portions 19 a are formed at both ends so as to contact the arm 3 at two points. The fixing point by the set screw 20 is set near the center of the leaf spring 19.

Next, an example will be described in which a ball urged by a spring is brought into contact with a brace instead of the plate spring. FIG.
Is a plan view of the keyboard cover 14 according to a second modification of the side guide means of the keyboard cover 14, FIG. 6 is a rear view of a main part of the keyboard cover 14, and FIG. 7 is a perspective view of a guide block that accommodates a ball. In these figures, two guide blocks 22 are attached to the left and right side surfaces of the keyboard cover 14 with set screws 23, respectively. A ball 25 is provided in the casing 24 of the guide block 22.
Is accommodated, and the ball 25 is urged by a compression coil spring 26 in the opening direction of the casing 24.

FIG. 6 shows an example in which the compression coil spring is directly urged by a ball, but a plate may be interposed between the end of the compression coil spring 26 and the ball 25. Further, the urging means of the ball 25 is not limited to a coil spring but may be a leaf spring. In short, it is only necessary that the ball 25 be elastically urged toward the arm 3.

In the above-described embodiment, an example is shown in which elastic members such as springs or balls urged by springs are provided on both side ends of the keyboard cover 14. However, such an elastic means may be provided only at one end of the keyboard cover 14. If at least one end has a portion that elastically contacts at two points, for example, the other one end can be brought into contact with the arm 3 via a roller or a roller without using a spring. This is because these rollers and rollers can be indirectly contacted with elasticity by a spring provided at one end.

The opening and closing operation of the keyboard cover 14 in the above configuration will be described. First, when opening the keyboard cover 14, a hand is applied to the handle 15 to apply a force upward. By this operation,
The resin cover 16 is guided upward along the front guide plate 17. Subsequently, when the handle 15 is pushed substantially horizontally, the resin cover 16 is guided to the back of the main body 1 along the upper surface of the front guide plate 17. Accordingly, the lower surface of the rear end of the keyboard cover 14 also slides on the rear guide plate 18 and moves to the back of the main body 1. Since the front guide plate 17 has a surface inclined downward toward the rear end, the keyboard lid 14 can be kept at a stable open position by the inclination.

When closing the keyboard cover 14, the user pulls the handle 15 with his or her hand to pull the resin cover 16 and the keyboard cover 14.
The rear ends of the front guide plate 17 and the rear guide plate 1
The keyboard cover 14 is guided along the upper surface of the keyboard 8 in a direction opposite to the opening direction, and the keyboard cover 14 moves to a position covering the keyboard 8. Finally the lid 1
4 is dropped along the front end of the front guide plate 17, the keyboard 8 is completely covered by the keyboard cover 14.

During the above opening and closing operations, the leaf spring 19 provided on the side of the keyboard cover 14 or the ball 2 of the guide block 22
A sliding member such as 5 moves in contact with the arm 3. Therefore, even if the skew occurs when the handle 15 is opened and closed with the handle 15 at a position deviated from the center in the width direction of the main body 1, the skew is immediately resolved because the keyboard cover 14 is not caught on the arm 3. The keyboard cover 14 moves smoothly.

[0026]

As is apparent from the above description, according to the first to fourth aspects of the present invention, the end of the keyboard lid is brought into contact with the arm bar, that is, the first guide member, through the elastic means. Occasionally, it is possible to prevent the arm from being caught and to ensure smooth movement.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an electronic piano according to an embodiment of the present invention.

FIG. 2 is a plan view of a keyboard cover according to an embodiment of the present invention.

FIG. 3 is a rear view of a main part of a side end portion of the keyboard cover.

FIG. 4 is a plan view of a main part showing an example of an elastic means provided at a side end of a keyboard cover.

FIG. 5 is a plan view of a modification of the keyboard cover according to the embodiment of the present invention.

FIG. 6 is a main part rear view of a side end portion of a keyboard cover according to a modification.

FIG. 7 is a perspective view of a guide block provided at a side end of the keyboard cover.

FIG. 8 is a sectional view of a main part showing an example of a conventional keyboard instrument.

FIG. 9 is an enlarged sectional view showing a rack and pinion mechanism used for a conventional keyboard instrument.

FIG. 10 is a sectional view of a main part showing another example of a conventional keyboard instrument.

[Explanation of symbols]

1: Electronic piano body, 2: Bottom plate, 3: Arm tree, 8 ...
Keyboard, 14: Keyboard lid, 15: Handle, 16: Resin cover, 17: Front guide plate, 18: Rear guide plate, 1
9: leaf spring, 20: set screw, 22: guide block, 25: ball, 26: compression coil spring

Claims (4)

[Claims] 1. A keyboard musical instrument having a keyboard cover which is opened and closed by moving in the front-rear direction of a musical instrument main body, wherein: a first guide member for guiding both side edges of the keyboard cover; A keyboard musical instrument comprising: a second guide member for guiding; and an elastic member provided on the keyboard cover so as to abut the first guide member at at least two points. 2. The keyboard musical instrument according to claim 1, wherein the elastic member is a leaf spring having a curved portion that contacts the first guide member. 3. The keyboard instrument according to claim 1, wherein said elastic member comprises a spring and a sphere pressed by said spring so as to contact said first guide member. 4. The vehicle further comprising: arms arranged on both side ends of the keyboard cover, wherein the first guide member is a side surface of the arm tree and the second guide member is provided on a side surface of the arm tree. 4. The keyboard instrument according to claim 1, wherein the keyboard instrument is a plate member.