JPH08179758A - Guide device of keyboard - Google Patents

Abstract

PURPOSE: To provide a guide device of a keyboard by which cost can be reduced and not only an inclination of the keyboard and an interval between mutual keyboards but also a clearance with the keyboards can be easily adjusted. CONSTITUTION: In a guide device of a keyboard to guide a white key 1a and a black key 1b rotatably supported with a keyboard chassis 2, the device is provided with guide material inserting parts 14 standing up from the keyboard chassis 2, a white key guide material 15 and a black key guide material 15 which are installed on these guide material inserting parts 14 and respectively guide the embedded white key 1a and black key 1b by using a side surface as a guide surface, and these white key guide materials 15 are composed of two black key guide materials 15 and 15 respectively installed in the mutually adjacent two guide material inserting parts.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a keyboard guide device for guiding the front part of a keyboard of a keyboard instrument, and more particularly to a guide device in which a white key guide material is also used as a black key guide material. It is a thing.

[0002]

2. Description of the Related Art This type of guide device prevents the tilting of the keyboards by regulating the movement of the front parts of the rotating keyboards in the left-right direction (width direction), and also keeps the distance between the keyboards from each other. It is provided to keep it proper. For example, as shown in FIG. 8, a guide device for a conventional electronic piano includes guide material insertion portions 52 and 53 for white keys and black keys that stand upright from a front end portion of a steel plate keyboard chassis 51, and soft plastic or Composed of elastomers or composites of these,
It is composed of plate-shaped guide members 54 and 55 inserted into the guide member insertion portions 52 and 53, respectively. And
In the guide members 54 and 55, between the side walls 56a and 56a of the white key 56 having an inverted U-shaped hollow cross section and between the black keys 57.
By fitting the side walls 57a, 57a between the guide members 54, 55 on both side surfaces as guide surfaces,
Guide the front of the white key 56 and the black key 57.

Further, as apparent from FIG. 8, the white key 56
The width (between the side walls 56a, 56a) A'is approximately twice as large as the width (between the side walls 57a, 57a) B'of the black key 57, corresponding to the guide material insertion part 52 and the guide. The material 54 has a width larger than the guide material insertion portion 53 and the guide material 55 for the black key (width A of the guide material 54> width B of the guide material), and is configured for the white key and the black key, respectively. Has been done, and as a result, white key 5
6 and the black key 57 are properly guided.

[0004]

However, in this guide device, since the guide members 53 and 54 are dedicated to the white key and the black key, respectively, and have different widths from each other, there are two types of sizes. You have to prepare a guide material for the fish. Therefore, there is a problem in that the cost is increased, for example, two types of molds for molding these are required.

Depending on the manufacturing precision and assembling precision of the parts, after being fitted into the guide device, the inclination of the keyboard and the interval between the keyboards are adjusted, and play is prevented from occurring.
It is necessary to adjust the gap between the keyboard and the keyboard. This adjustment is performed by deforming the guide material insertion portion that is relatively hard in material, but in the above-mentioned conventional guide device, the width of the guide material insertion portion for the white key is large, and therefore the rigidity is also large, Very difficult to adjust. As a guide device for solving this problem, for example, Japanese Utility Model Publication No. 45-303
As disclosed in Japanese Unexamined Patent Publication No. 87, by forming a notch in the base portion of the guide material insertion portion to reduce the rigidity, and inserting the tip portion of the driver into the notch to deform,
It is also known to adjust. However, since this guide device deforms the guide material insertion part as a whole and the width cannot be changed, the inclination of the keyboard and the interval between the keyboards can be adjusted, but the space between the keyboard and the keyboard can be adjusted. It is impossible to eliminate the backlash by adjusting the gap.

The present invention has been made in order to solve such problems, and can reduce the cost, and not only the inclination of the keyboard and the interval between the keyboards, but also the clearance between the keyboard and the keyboard. It is an object of the present invention to provide a keyboard guide device that can be easily adjusted.

[0007]

In order to achieve the above object, the present invention is a keyboard guide device for guiding a white key and a black key rotatably supported by a keyboard chassis, the device standing upright from the keyboard chassis. And a guide material for a white key and a guide material for a black key, which are attached to the guide material insertion portion and guide the fitted white key and black key, respectively, with the side surfaces as guide surfaces. It is characterized in that the white key guide material is composed of two black key guide materials that are respectively attached to two adjacent guide material insertion portions.

In this case, it is preferable that two adjacent guide material insertion portions stand up independently of each other from the keyboard chassis.

[0009]

According to the keyboard guide device of the first aspect, the white key is fitted into the guide material for the white key attached to the guide material insertion portion standing upright from the keyboard chassis, and the side surface thereof is guided as a guide surface. The black key is also fitted into a similar black key guide member, and the side surface thereof is guided as a guide surface. In this case, the white key guide material is composed of two black key guide materials attached to the two guide material insertion portions adjacent to each other, that is, can be shared with the black key guide material. Therefore, one type of guide material is sufficient. As described above, it is possible to configure the white key guide material with the two black key guide materials because the white key generally has a width about twice that of the black key.

Further, by deforming two adjoining guide material insertion parts to which the white key guide material is attached,
Not only can the inclination and position of the guide device be changed to adjust the inclination of the white keys guided by the guide device and the intervals between the white keys, or the intervals between the white keys and the black keys, but also the two guide members for the black keys can be brought closer to each other. By independently deforming in the fitting direction or the separating direction, the distance between the black key guide materials, that is, the width of the guide device as a whole can be changed to easily adjust the gap with the white key. it can.

In the guide device according to the second aspect of the present invention, the two adjacent guide material inserting portions for attaching the guide material for the white keys stand independently of each other from the keyboard chassis. Independent deformation is facilitated and thus adjustment is facilitated.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a keyboard device for an electronic piano incorporating a keyboard guide device according to the present invention. First,
This keyboard device will be briefly described.

The keyboard 1 is composed of a white key 1a and a black key 1b, both of which are made of resin, and have a top wall 1c and a pair of side walls 1d and 1d facing each other. It is formed in a U shape (see FIG. 3). A rear end portion (right end portion in FIG. 1) of the keyboard 1 is rotatably supported by a bearing member 3 fixed to a keyboard chassis 2 made of a steel plate, and a return spring 4 always keeps the key release direction. Being energized. A switch pressing portion 5 is formed in the central portion of the keyboard 1, and when the key is pressed, the switch pressing portion 5 presses a keyboard switch 6 attached to the keyboard chassis 2 so that the keyboard 1 is pressed. It is detected, and the pronunciation is controlled according to the detection result.

At the front ends of the white key 1a and the black key 1b,
Hook-shaped stopper portions 8 and 9 are formed, respectively. As shown in FIG. 3, the stopper portion 8 of the white key 1a has a rearwardly-extending extension portion 8a composed of portions where the side walls 1d and 1d extend downward and a front wall which closes the front ends thereof.
And a pair of left and right engaging portions 8b, 8b extending rearward from the lower end of the extending portion 8a. Further, the stopper portion 9 of the black key 1b has an extended portion 9a whose front side is open.
And a pair of left and right engaging portions 9b, 9b that extend forward from the lower end of the extending portion 9a.

On the other hand, on the upper and lower surfaces of the front end portion of the keyboard chassis 2, lower limit stopper cushions 10a, 10b and upper limit stopper cushion 11 for white keys 1a and black keys 1b made of an elastic material such as sponge or elastomer are provided.
a and 11b are attached respectively. In the white key 1a and the black key 1b, the lower end surfaces of the side walls 1d thereof come into contact with the lower limit stopper cushions 10a and 10b,
The limit key pressing position is regulated, and the locking portions 8a and 9b of the stopper portions 8 and 9 are set to the upper limit stopper cushions 11a and 1a.
By abutting on 1b, the key release position is regulated.

The guide devices 12 and 13 for the white key 1a and the black key 1b according to the present invention are provided at the front end portion of the keyboard chassis 2 as shown in FIGS. The front portions of the black key 1a and the black key 1b are fitted and guided.

As shown in FIG. 2, the guide device 13 for the black key 1b is provided with a guide material insertion portion 14 formed upright by bending the front end portion of the keyboard chassis 2, and the guide material insertion portion 14. The guide member 15 is attached by being inserted. The guide member 15 is made of a soft plastic such as polypropylene, an elastomer, or a composite material thereof, and is formed by, for example, die molding. The guide member 15 has a rectangular plate shape as a whole and has an insertion hole 16 for attachment to the guide member insertion portion 14, and its width A is a width A ′ between the side walls 1d and 1d of the black key 1b. It is set slightly smaller than.

As shown in FIG. 3, the front portion of the black key 1b is fitted into the guide device 13 from the rear and above, the rear end portion of the black key 1b is supported by the bearing member 3, and the return spring 4 is attached. As a result, the black key 1b is attached to the keyboard device (see FIG. 1). In this state, the black key 1b
The side walls 1d, 1d face the both side surfaces of the guide member 15 with a slight clearance, and are guided with these both side surfaces as guide surfaces.

On the other hand, in the guide device 12 for the white key 1a, similarly to the guide material inserting portion 14, two guide material inserting portions 18, 18 formed at the front end of the keyboard chassis 2 are provided.
And the guide members 15, 15 attached to them in the same manner. The guide material insertion portions 18, 18 stand upright from the keyboard chassis 2 independently of each other. Further, each guide member 15 is exactly the same in material, size and shape as the guide member 15 for the black key 1b, and is formed by a common mold. Further, as shown in FIG. 3, the guide members 15 and 15 are attached to the guide member inserting portions 18 and 18 respectively.
The entire width B of the white key 1a attached to the side wall 1
The width is set to be slightly smaller than the width B ′ between d and 1d.

As shown in FIG. 3, the white portion of the white key 1a is fitted into the guide device 12 from the front and the upper side, the rear end portion is supported by the bearing member 3, and the return spring 4 is attached thereto. The key 1a is attached to the keyboard device (see FIG. 1). In this state, the side walls 1d and 1d of the white key 1b face the outer side surfaces of the guide members 15 and 15 with a slight gap, and are guided with their both side surfaces as guide surfaces.

FIG. 4 shows a method of adjusting the white key 1a by the guide device 12. This adjustment is performed by the inclination of the white key 1a, the inclination of the white key 1a, the inclination of the white key 1a caused by the variation in the manufacturing accuracy and the assembly accuracy of the white key 1a, the guide material 15, the guide material insertion portion 18, and the like.
The distance between the a and the variation in the gap between the white board 1a and the side surface of the guide member 15 are adjusted after the white key 1a is attached. When adjusting the inclination of the white keys 1a or the intervals between the white keys 1a, the two guide material insertion portions 18, 18 are respectively deformed in the same direction as shown by the arrows in FIG. 4 (a). As a result, the inclination and position of the guide device 12 are changed, and the inclination of the white key 1a guided by the guide device 12 and the interval between the white keys 1a or between the white key 1a and the black key 1b can be adjusted.

Further, as shown in FIG. 4B, the guide members 15 and 15 are deformed so that the guide member inserting portions 18 and 18 are deformed in a direction in which they are separated from each other or in a direction in which they approach each other.
It is possible to properly adjust the gap between the white key 1a and the side surface of the guide member 15 by changing the distance between them, that is, the width of the guide device 12 as a whole so as to prevent backlash.

As described above, in the guide device 12 of the present embodiment, the inclination of the white keys 1a, the spaces between the white keys 1a or between the white keys 1a are detected.
Not only can you adjust the space between the black key 1b and
The gap between a and the side surface of the guide member 15 can be properly adjusted. In addition, the two guide material insertion portions 18, 1
Since 8 stands up independently of the keyboard chassis 2, the tip end of the driver is connected to the two guide material insertion portions 1.
These can be easily deformed by applying them to 8, 18 or the like, and thus the above adjustment can be easily performed. Further, the guide material 15 for the white key 1a and the black key 1b are constructed in the same manner, and only one type is required, and only one common molding die is required. Therefore, the cost can be reduced. .

The guide material 15 for the black key 1b is designed.
When it is desired to make the guide material 15 shorter than the guide material 15 for the white key 1a, the guide material 15 for the black key 1b may be formed by cutting with a common molding die and then cut and shortened. Alternatively, as shown in FIG. 5, the guide material 15 for the white key 1a is formed into a double-link type having a connecting portion 19 in the middle, and the connecting portion 1 is formed.
9 may be deleted and used as the guide material 15 for the black key 1b.
In any of these cases, only one mold is required,
The cost reduction can be achieved as in the above-mentioned embodiment.

FIG. 6 shows another embodiment of the guide material insertion portion 18. The guide material insertion portions 18, 18 are
In the above-mentioned embodiment, these stand up independently of the keyboard chassis 2 and are easily deformed, while the rigidity is increased by connecting the bases.

FIG. 7 shows an example of the guide material 15 suitable for lubricating the side surface of the guide material 15 and the side wall 1d of the white key 1a or the black key 1b. Guide material 1 of FIG.
5a is for the white key 1a, and each guide material 15a
A lubricant escape hole 21 that communicates the uppermost end portion of the insertion hole 16 with the outer side surface, that is, the guide surface is formed therein.
Then, grease or the like is previously applied as a lubricant to the upper surface of each guide material insertion portion 18, and then the guide material 15
By inserting a into the guide material insertion portion 18 and press-fitting it, the grease is pressed by the top wall of the guide material 15a, and the guide material 1 is inserted from the insertion hole 16 through the lubricant escape hole 21.
It is pushed out to the side surface of 5a for lubrication.

The guide member 15b shown in FIG. 7B is formed along the side surface of the guide member 15a shown in FIG.
2 is formed. In this guide member 15b, the grease extruded to the upper side surface of the guide member 15a through the lubricant escape hole 21 is guided to the lower end of the side surface along the lubricant guide groove 22 and is retained in the lubricant guide groove 22. Therefore, a sufficient amount of grease can surely lubricate the entire guide surface. The width and depth of the lubricant guide groove 22 can be appropriately set according to the amount of grease, durability, viscosity, and the like, and are set so as to change along the length direction of the lubricant guide groove 22. You can also By setting the width and the depth of the lubricant guide groove 22 as described above, it is possible to efficiently spread the grease over the entire guide surface without excess or deficiency.

The guide member 15c of FIG. 7 (c) has a pair of lubricant receiving pieces 23, 23 formed on the upper surface so as to face each other.
Grease is applied in advance between the lubricant receiving pieces 23, 23, and the lubricant receiving piece 23 is pressed by the top wall 1c of the white key 1a or the black key 1b, thereby pushing the grease to the side surface for lubrication. Is to do. The guide member 15d shown in FIG. 7D further has a lubricant guide groove 22 formed therein.

[0029]

As described above in detail, the keyboard guide device of the present invention can reduce the cost by using the common guide material, and not only the inclination of the keyboard and the interval between the keyboards, but also the relationship with the keyboard. The gap between them can be easily adjusted to prevent looseness of the keyboard.

[Brief description of drawings]

FIG. 1 is a side view of a keyboard device of an electronic piano incorporating a guide device of the present invention.

FIG. 2 is an exploded perspective view of a guide device according to the present invention.

3 is a perspective view showing how the keyboard is attached to the guide device of FIG. 2. FIG.

4 is a diagram showing a method of adjusting a keyboard by the guide device of FIG.

FIG. 5 is a perspective view showing another embodiment of the guide member.

FIG. 6 is a perspective view showing another embodiment of the guide material insertion portion.

FIG. 7 is a perspective view showing another example of the guide member.

FIG. 8 is a perspective view showing a conventional guide device.

[Explanation of symbols]

 1 keyboard 1a white key 1b black key 2 keyboard chassis 12 guide device for white key 13 guide device for black key 14 guide material insertion part 15 guide material 18 guide material insertion part

Claims (2)

[Claims] 1. A guide device for a keyboard, which guides a white key and a black key rotatably supported by a keyboard chassis, comprising a guide material insertion part standing upright from the keyboard chassis and attached to the guide material insertion part. And a white key guide material and a black key guide material for guiding the fitted white key and the black key, respectively, using the side surfaces as guide surfaces, and the white key guide material includes two adjacent white key guide materials. A guide device for a keyboard, characterized in that the guide device is composed of two guide members for black keys, each of which is attached to the guide member insertion portion. 2. The keyboard guide device according to claim 1, wherein the two adjacent guide material insertion portions are erected independently of each other from the keyboard chassis.