JPH1063259A - Keyboard device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To decrease the number of parts and man-hours for assembly and to lessen the lateral swinging, shaking, etc., of keys by pressing the recessed parts of holding parts for fixing keys to the holes of a keyboard chassis and pivotally supporting the keys to this keyboard chassis. SOLUTION: The rear ends of the keys 11 are provided with key mounting parts 13 which are inserted into the first holes 14 bored at the keyboard chassis 12. These key mounting parts 13 are provided with the holding parts for fixing the keys provided with recessed parts which extend downward by having a prescribed thickness from both surface sides at the rear ends of these mounting parts and hold the plate thickness parts of the keyboard chassis 12. The key fixing parts which have flexibility, extend while curving backward by having the prescribed thickness and are provided with projecting parts 20 to be inserted into the second holes 19 bored at the keyboard chassis 12 exist in the space parts on the inner side of the key mounting parts 13 in the rear parts of the keys 11. These projecting parts are inserted into the second holes 19 and the recessed parts of the holding parts for fixing the keys are pressed to the plate thickness parts of the keyboard chassis 12, by which the keys 11 are pivotally supported to the keyboard chassis 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a keyboard device,
In particular, it relates to a key mounting structure.

[0002]

2. Description of the Related Art In an electronic keyboard musical instrument using a keyboard device, a musical tone is generated by pressing a key. This key is
A biasing means having a pivot point at the rear of the key and biasing the key upward is provided. FIG. 5 shows a schematic configuration diagram of a conventional example. In FIG. 5, a key 1 is rotatably supported by a shaft member 3 fixed to a keyboard chassis 2.

As shown in FIG. 5 (a), a supporting portion for supporting a key has a structure in which a through hole provided in a key 1 is rotatably supported by a shaft member 3 fixed to a keyboard chassis 2, FIG.
As shown in (b), the bearing 4 communicating from the lower surface of the key 1
The shaft member 3 fixed to the keyboard chassis 2 is inserted into the keyboard chassis 2 to rotatably support the shaft member 3 or, as shown in FIG. , And rotatably supported by being inserted through a bearing member 5 fixed to the motor.

In the above-described configuration, the shaft and the bearing are used, so that the rotation of the key 1 is smooth, and the key 1 has less horizontal runout and rattling. However, since the number of parts and the number of assembling steps are increased, high-grade Used in products. Fig. 6
The configuration shown in FIG. 1 is mainly used.

In FIG. 6, as shown in FIG.
At the rear of the key 1a, a projection 7 having a pivot 6 penetrating through the perforation 2a of the keyboard chassis 2 is provided. The pivot 6 is brought into contact with the keyboard chassis 2 and biased rearward by a spring 8 to rotate the key 1a. It is movable and fixed. In FIG. 6B, the pivot 6 provided at the rear of the key 1a is brought into contact with the projecting portion 9 erected from the keyboard chassis 2 to urge the key 1a rearward (in the direction of the arrow in the figure). 1a is fixed. FIG.
In (c), the pivot portion 6 provided on the lower surface of the key 1a is brought into contact with the projecting portion 9 erected from the keyboard chassis 2 to urge the key 1a downward (in the direction of the arrow in the figure) to fix the key 1a. ing.

In the above configuration, the number of parts and the number of assembling steps are reduced as compared with the case where a shaft and a bearing are used.
There is a problem that the horizontal vibration and rattling of “a” are increased, and abnormal noise is easily generated. Further, in the keyboard device in which the key is returned upward by the urging force of the spring 8, it is difficult to obtain the touch of a key like a piano, and it is not possible to improve the quality.

[0007]

Among the conventional examples described above, in the configuration using a shaft and a bearing, the rotation of the key is smooth and the lateral deflection and rattling of the key are small, but the number of parts and the number of assembly steps are large. There was a problem. Also, in a configuration using a spring to reduce the number of parts and the number of assembly steps, the pivot point must be brought into strong contact with the pivot portion of the key to maintain the pivotal support. And the number of assembly steps cannot be reduced even if the parts are inexpensive.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the number of parts and the number of assembling steps of a keyboard device, to reduce lateral vibration and rattling of a key, and to increase the efficiency of workability when replacing a key part. And

[0009]

Therefore, in the keyboard device according to the first aspect of the present invention, a key, a first hole for pivotally supporting the key, and a second hole for retaining pivotal support of the key are provided. A keyboard chassis and a concave portion having a predetermined thickness from both sides of the rear end portion of the key and extending downward and extending through a first hole formed in the keyboard chassis to clamp the thickness portion of the keyboard chassis. A key fixing portion having a key fixing holding portion provided, a key fixing portion extending from the rear end of the key with a predetermined thickness and flexibility, and a key fixing portion provided on the key fixing portion and punching into a keyboard chassis. A protrusion is provided which is inserted into the second hole provided so that the concave portion of the key fixing holding portion abuts on the first hole of the keyboard chassis to pivotally support the key to the keyboard chassis. .

According to a second aspect of the present invention, there is provided the keyboard device according to the first aspect, wherein a space portion vertically penetrating a rear portion of the key is formed, and a key fixing portion is provided in the space portion. Features. Therefore, the key has the concave portion of the key fixing holding portion provided in the key mounting portion pinched by the plate thickness portion of the first hole formed in the keyboard chassis, and the key is fixed to the second hole formed in the keyboard chassis. It can be rotatably fixed simply by inserting the projecting part of the part.

According to a third aspect of the present invention, there is provided the keyboard device as set forth in any one of the first and second aspects, wherein a tongue is provided on a surface opposite to the protruding portion, and an end of the tongue is provided. It is characterized in that it protrudes from the upper surface of the key attachment part. Therefore, the protrusion can be inserted into the keyboard chassis by pushing in the tongue, and the protrusion inserted into the keyboard chassis can be removed only by pulling up the tongue. It can be easily attached to and detached from.

According to a fourth aspect of the present invention, in the keyboard device of the first aspect, the key attachment portion has a predetermined thickness from both side surfaces of a rear portion of the key and extends rearward. The end portion extends downward to form a key fixing holding portion, and the key fixing portion is located between the key attaching portions and further extends rearward from the rear end of the key attaching portion.

According to a fifth aspect of the present invention, there is provided the keyboard device according to the fourth aspect, wherein a tongue is provided on a surface opposite to the projection provided on the key fixing portion, and the end of the tongue is attached to the key. It is characterized by projecting from the rear end of the mounting part. Therefore,
Since the rear part of the key mounting part is open, the key fixing part provided between the key fixing holding parts can be easily inserted into and removed from the keyboard chassis.

According to a sixth aspect of the present invention, there is provided the keyboard device according to any one of the first to fifth aspects, wherein the projection at the time of mounting is located above the recess provided in the key fixing holding portion. , And the key is urged upward by being inserted into the second hole. A biasing force for biasing the key upward is applied to the key fixing portion, which is curved and has a predetermined thickness and has flexibility and extends, so that the spring member can be omitted.

According to a seventh aspect of the present invention, in the keyboard device according to any one of the first to sixth aspects, the key attachment portion and the key fixing portion are formed integrally with the key. It is characterized by. Therefore, since the key attaching portion and the key fixing portion are formed integrally with the key, the number of members for attaching the key is reduced, and the number of assembling steps can be reduced.

In the keyboard device according to the present invention, the first holes formed in the keyboard chassis may extend from the opposing side surfaces of the adjacent keys. The key fixing holding portion is inserted into one hole, and a notch portion for positioning a key is provided. Therefore, the number of holes formed in the keyboard chassis can be reduced, so that the strength of the keyboard chassis at a portion where a key is attached can be increased. In addition, the key can be easily positioned, and the key is prevented from swinging left and right.

According to a ninth aspect of the present invention, there is provided the keyboard device according to the first aspect, wherein the side for pivotally supporting the key fixing holding portion of the key attaching portion of the first hole formed in the keyboard chassis. When,
The side of the second hole, into which the protruding portion is inserted, close to the key fixing holding portion is arranged substantially on the same line. Therefore, the pivotal position of the key and the position where the key fixing portion that applies the urging force for urging the key upward is fixed are located at substantially the same distance from the key pressing position. In contrast, a change in the angle of the key fixing portion and a change in the length of the key fixing portion are reduced, and the change in the urging force can be reduced during the key pressing operation.

[0018]

FIG. 1 is a perspective view showing one embodiment of a keyboard device of the present invention. FIG. 2 is a partial sectional perspective view showing a main part of the present invention. 1 and 2, a large number of keys 11 are arranged on the upper surface of a keyboard chassis 12.
A key attaching portion 13 is provided at the rear end of the key 11,
It is inserted through a first hole 14 formed in the keyboard chassis 12.

The key attaching portion 13 extends rearward from both sides of the key 11 with a predetermined thickness and has a predetermined thickness, and is integrally formed by a rear side surface portion 15 connecting the both ends of the extended key attaching portion 13. A space is formed inside formed by the key attachment portion 13 and the rear side surface 15. Then, the key attaching portion 13
A concave portion 17 extending downward from both side surfaces of the rear end portion with a predetermined thickness to sandwich the plate thickness portion 16 of the keyboard chassis 12.
Is provided with a key-fixing holding portion 18 provided with.

The space inside the key mounting portion 13 at the rear of the key 11 is flexible, has a predetermined thickness, extends backward while curving backward, and is pierced into the keyboard chassis 12. Key fixing portion 21 provided with a protruding portion 20 to be fitted into the second hole 19
By inserting the protruding portion 20 into the second hole 19, the concave portion 17 of the key fixing holding portion 18 is brought into contact with the plate thickness portion 16 of the keyboard chassis 12, and the key 11 is moved to the keyboard chassis 12. It is made to pivot.

The key fixing portion 21 has a tongue piece 22 projecting from the upper surface of the key attaching portion 13 on the opposite surface where the projecting portion 20 is provided.
The protrusion 20 is easily inserted into the second hole 19 formed in the keyboard chassis 12 and removed from the hole 19 by pressing the tongue piece 22 with a finger or the like.

First hole 14 formed in keyboard chassis 12
In order to insert each key fixing holding portion 18 extending from the opposite side of the adjacent key 11 into one hole,
Notches 23 for positioning the key 11 by abutting against the concave portion 17 of the key fixing holding portion 18 are provided on one side of the key 11 on the side where the key pressing portion of the key 11 is provided.

The width of the notch at the tip of the notch 23 is substantially equal to or slightly smaller than the thickness of the recess 17, and the tip of the notch 23 is inserted into the second hole 19 of the projection 20. The concave portion 17 abuts on the key 11 to prevent the key 11 from swinging left and right. The second hole 19 formed in the keyboard chassis 12 is located on the front side of the arrangement position of the first holes 14,
The first hole 14 is formed between the holes.

Next, referring to FIGS. 3 (a) to 3 (c), how to attach the key 11 to the keyboard chassis 12 and FIGS. 3 (d) to 3 (f) will be described. How to remove the key 11 from the keyboard chassis 12 will be described with reference to FIGS. FIG. 3A shows a state in which the key fixing holding portion 18 of the key attaching portion 13 is positioned above the first hole 14 formed in the keyboard chassis 12.

FIG. 3B shows a first hole 14 formed in the keyboard chassis 12 with the key fixing holding portion 18 of the key attaching portion 13.
Through the notch 23 and the concave portion 1 of the key fixing
7 shows a state in which 7 is brought into a contact position. The projecting part 20 of the key fixing part 21 is located above the second hole 19 of the keyboard chassis 12 and slightly behind the hole 19.

FIG. 3C shows the projection 2 of the key fixing portion 21.
0 into the second hole 19 of the keyboard chassis 12 so that the first
The notch 23 of the key fixing holding portion 18 is
Shows a state in which the robot is brought into contact with and pivoted. Key holding section 1
The key 11 is moved in the direction of the arrow in the figure so that the concave portion 17 of FIG.
Into the second hole 19.

Next, how to remove the key 11 from the keyboard chassis 12 will be described. 3D, the tongue piece 22 provided on the key fixing part 21 is pushed up in the direction of the arrow in the figure, and the inserted projection 20 is moved to the keyboard chassis 1.
2 shows a state where it is detached from 2.

FIG. 3E shows that the projection 20 is detached from the keyboard chassis 12, the key 11 is moved backward, and the first hole 1 is moved.
4 shows a state in which the concave portion 17 of the key fixing sandwiching portion 18 which is in contact with the notch 23 of FIG. In addition, FIG.
Moves the key mounting portion 13 upward, and moves the keyboard chassis 12
It shows the state removed from.

When the key 11 is depressed, the key fixing holding portion 18 is inserted into the notch 23 of the first hole 14 of the keyboard chassis 12.
The turning operation is performed with the portion pivotally supported by contacting the concave portions 17. Since the operation range of this rotation operation is about 3 to 4 degrees in angle, the pivoted concave portion 17 or the first
The shape of the notch 23 of the hole 14 is slightly movable in the vertical direction.

Alternatively, the first hole 14 of the keyboard chassis 12
The concave portion 17 of the key fixing holding portion 18 is engaged with the notch portion 23 of the key, and a material capable of allowing a slight deformation of the pivotally supported portion or a shape capable of permitting the deformation by making a cut or the like at both corners of the concave portion 17 Is also good. By filling the pivoted portion with grease or the like and applying a material for promoting lubrication, quietness can be easily ensured.

When the key fixing holding portion 18 of the key attaching portion 13 is inserted into the first hole 14 formed in the keyboard chassis 12 and the notch portion 23 is brought into contact with the concave portion 17 of the key fixing holding portion 18. The projecting portion 20 of the key fixing portion 21 is located above the second hole 19 of the keyboard chassis 12 and slightly behind the hole 19.

The key fixing portion 21 is flexible and curved, so that the shape and thickness of the key fixing portion 21 are adjusted so that the projecting portion 20 of the key fixing portion 21 is formed in the second hole of the keyboard chassis 12. When the key 11 is inserted, the curved portion serves as an urging means for urging the key 11 upward. Therefore,
The spring member individually attached to the conventional key can be omitted.

First hole 14 formed in keyboard chassis 12
The side of the notch 23 provided on the side where the key 11 of the key 11 is located and the side of the second hole 19 formed in the keyboard chassis 12 on the side near the notch 23 provided in the first hole 14 are They are arranged so that they are substantially on the same line. With this arrangement, the pivotal position of the key 11 and the position where the key fixing portion 21 that applies the urging force for urging the key 11 upward is fixed are located at substantially the same distance from the key pressing position. Therefore, a change in the angle of the key fixing portion 21 and a change in the length of the key fixing portion 21 caused by the rotation of the key 11 due to the key pressing operation are reduced, and the change in the urging force during the key pressing operation is reduced. it can.

Normally, when an urging force is applied by using a spring member, when the key 11 is pressed, a load (terminal load) to be maintained at the end by the key pressing becomes larger than the initial load of the key 11. There was a problem in that fingering during performance caused discomfort. In the above configuration, the change in the urging force is reduced, that is, the difference between the initial load and the terminal load is reduced.
Discomfort caused by fingering during performance can be eliminated.

4 (a), a rear view of the key mounting portion 24 of FIG. 4 (b), and a bottom view of the key mounting portion 24 of FIG. 4 (c). This will be described with reference to the drawings. The key attachment portion 24 has a predetermined thickness and extends rearward from both side surfaces of the rear end of the key 11 to provide a key fixing holding portion 25, and a concave portion 26 provided in the key fixing holding portion 25 has an opening formed therein. The part faces the rear end side of the key attachment part 24.

The key fixing portion 27 is provided with a key fixing holding portion 25.
The protrusion 28 provided on the key fixing portion 27 is located behind the key fixing holding portion 25. The tongue piece 29 provided on the opposite surface of the protrusion 28 extends further rearward than the rear end of the key attachment 24.

The first hole 31 formed in the keyboard chassis 30 is provided with a key-locking portion 25 so that each of the key-fixing holding portions 25 extending from the side face of the adjacent key 11 can be inserted into one hole. The key 1 is brought into contact with the concave portion 26 of the
Two notches 32 for positioning the key 1 are provided on one side of the rear surface side of the keyboard chassis 30 by two. The second hole 33 formed in the keyboard chassis 30 is the first hole 3
1 and a recess 2 of the key fixing holding portion 25
6 is moved rearward and brought into contact with the notch 32,
7 is pivotally supported by inserting a protruding portion 28 provided in the same.

In the above-described configuration, since the rear surface of the key mounting portion 24 is open, the key fixing portion 27 provided between the key fixing holding portions 25 can be easily inserted into and removed from the keyboard chassis 30. It can be carried out.

[0039]

According to the present invention, the number of parts and the number of assembling steps of the keyboard device can be reduced. In addition, it is possible to reduce the key's lateral deflection and rattling. Further, the efficiency of workability when exchanging key parts can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a keyboard device showing one embodiment of the present invention.

FIG. 2 is a partial sectional perspective view showing a main part of the present invention.

FIGS. 3A to 3C are explanatory views showing a state in which a key according to an embodiment of the present invention is attached to a keyboard chassis;
(D) to (f) are explanatory views showing a state in which the key is removed from the keyboard chassis.

FIGS. 4A and 4B show another embodiment of the present invention, wherein FIG. 4A is a side view of a key mounting portion, FIG. 4B is a rear view of the key mounting portion, and FIG. 4C is a bottom view of the key mounting portion.

FIG. 5 is a schematic configuration diagram showing a conventional example.

FIG. 6 is a schematic configuration diagram showing another conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 1a Key 2 Keyboard chassis 3 Shaft member 4 Bearing 5 Bearing member 6, 9 Pivot part 7 Projection part 8 Spring 11 Key 12, 30 Keyboard chassis 13, 24 Key attachment part 14, 31 First hole 15 Rear side part 16 Plate thickness portion 17, 26 Recessed portion 18, 25 Key fixing holding portion 19, 33 Second hole 20, 28 Projecting portion 21, 27 Key fixing portion 22, 29 Tongue piece 23, 32 Notch

Claims (9)

[Claims] 1. A key chassis having a key, a first hole for pivotally supporting the key, and a second hole for retaining pivotal support of the key. A key attachment portion having a key fixing holding portion having a plate thickness and extending downward and having a concave portion for holding the keyboard chassis by inserting the first hole formed in the keyboard chassis and holding the keyboard chassis; A key fixing portion extending from the rear end portion with a predetermined thickness and having flexibility, and by being inserted into the second hole provided in the key fixing portion and drilled in the keyboard chassis. A keyboard device, comprising: a protrusion for bringing the concave portion of the key fixing holding portion into contact with the first hole of the keyboard chassis to pivotally support the key to the keyboard chassis. 2. The keyboard device according to claim 1, wherein a space that penetrates up and down is formed in a rear portion of the key, and the key fixing portion is provided in the space. 3. The keyboard device according to claim 1, wherein a tongue is provided on a surface opposite to the protruding portion, and an end of the tongue is positioned from an upper surface of the key attachment portion. A keyboard device characterized by being protruded. 4. The keyboard device according to claim 1, wherein the key attachment portion has a predetermined thickness and extends rearward from both side surfaces of a rear portion of the key, and an end portion extends downward. The key device is further formed with a key fixing holding portion, wherein the key fixing portion is located between the key attaching portions and extends further rearward than a rear end of the key attaching portion. 5. The keyboard device according to claim 4, wherein a tongue piece is provided on an opposite surface of said projection provided on said key fixing portion,
A keyboard device, wherein an end of the tongue piece protrudes from a rear end of the key attachment portion. 6. The keyboard device according to claim 1, wherein the projecting portion at the time of mounting is located above a concave portion provided in the key fixing holding portion, and A key device which is urged upward by being inserted into said hole. 7. The keyboard device according to claim 1, wherein said key attachment portion and said key fixing portion are formed integrally with said key. . 8. The keyboard device according to claim 1, wherein each of the first holes formed in the keyboard chassis has one key fixing holding portion extending from an opposite side of an adjacent key. A keyboard device characterized in that a notch for positioning a key is provided through a hole. 9. The keyboard device according to claim 1, wherein a side of the first hole formed in the keyboard chassis, which pivotally supports a key fixing holding portion of a key attaching portion, and the protruding portion are inserted. A side of the second hole, which is closer to the key fixing holding portion, is disposed substantially on the same line.