JPH08115077A - Safety device of keyboard lid - Google Patents

Abstract

PURPOSE: To provide a safety device of a keyboard lid applicable even to a keyboard lid freely turnably supported by a hinge, like the keyboard lid of an upright piano. CONSTITUTION: This safety device 10 is provided with a hole part 12c at the end face 12b on the base end 12a side of the keyboard lid 12. A flexible tube 14 fixed to a deep roof 13 is inserted into this hole part 12c. The hole part 12c is provided with a compression coil spring 16 deep therein. An aperture 12d exists lower than the turning central part 18a of a hinge 18 and, therefore, the tube 14 slips out of the hole part 12c when the keyboard lid 12 is opened. The tube 14 enters the hole part 12c and the coil spring 16 comes into contact with the front end of the tube 14 before the keyboard lid 12 turns from the full open position to the full close position when the keyboard lid 12 is closed and, therefore, repulsive force is generated in the coil spring 16 and the tube 14 receives the force in the direction where the tube is pushed out of the hole part 12c. Since the turning speed of the keyboard lid 12 is regulated in such a manner, there is no possibility of pinching the fingers by the keyboard lid 12 and the consequent injury thereof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a keyboard lid that prevents a finger from being caught by an accidentally closed keyboard lid to prevent injury.

[0002]

2. Description of the Related Art Conventionally, as a safety device of this type,
For example, as disclosed in Japanese Utility Model Publication No. 5-48238 filed by the applicant of the present application, one using a rotary type oil damper is known. According to this, as shown in FIG. 5, the rotary type oil damper P10 is embedded in the arms P12 of the keyboard instrument, and the oil damper P1 is formed.
The damper shaft P14 protruding from 0 to the keyboard lid side is connected to a connector P18 provided on the side surface of the base end P16a of the keyboard lid P16. When the keyboard lid P16 is rotated in the closing direction, the damper shaft P14 is rotated. A blade plate (not shown) fixed to P14 receives the resistance of oil to regulate the rotation speed of the keyboard lid P16. Such a safety device has an excellent effect that it is possible to prevent fingers from being caught by the keyboard lid P16 that is accidentally closed.

[0003]

By the way, the above-mentioned conventional safety device is mainly applied to a keyboard lid of a grand piano. That is, in a grand piano, in the usual case, the keyboard lid P16 is rotatably attached to the instrument body by connecting the side surface of the arm member P12 and the side surface of the keyboard lid P16 by a pivot shaft. By using the oil damper P10 as described above, the safety device can be easily configured.

However, as shown in FIG. 6, in the case of the keyboard lid P22 of the upright piano P20, it is usually attached to the back roof P24 of the musical instrument body via a hinge P26. Therefore, in the case of the upright piano, since the hinge P26 is used, the oil damper P10 as described above cannot be used, and it is difficult to provide the safety device.

The present invention has been made to solve the above problems, and can be applied to a keyboard lid rotatably supported by a hinge, such as a keyboard lid of an upright piano. The purpose is to provide a device.

[0006]

Means for Solving the Problems, Actions and Effects of the Invention According to the invention of claim 1 for achieving the above object, a keyboard lid rotatably attached to a musical instrument body and the keyboard lid are fully opened. An elastic member that is sandwiched between the keyboard lid and the musical instrument body at a position lower than the center of rotation of the keyboard lid before rotating from the position to the fully closed position. To do.

In the invention of claim 1 having the above-mentioned structure, when the keyboard lid is closed from the fully open position, the elastic member causes the keyboard lid and the musical instrument body to move before the keyboard lid is rotated to the fully closed position. It is sandwiched and compressed. Therefore, the repulsive force of the compressed elastic member causes the keyboard lid to move in the closing direction at a slow speed. Therefore, the finger can be retracted before it is caught in the keyboard lid, or even if the finger is caught, no injury will occur. Also,
On the contrary, when the keyboard lid starts to be opened from the fully closed position, since the biasing force of the elastic member is applied to the keyboard lid, the keyboard lid can be easily opened with a light force.

In the safety device according to the first aspect of the present invention, since it is only necessary to provide an elastic member on the end surface of the keyboard lid or the musical instrument body, the keyboard lid rotatably supported by a hinge, such as an upright piano. Can also be applied to. The invention according to claim 2 is a keyboard lid having a base end portion rotatably attached to the instrument body, and the keyboard lid before the keyboard lid is pivoted from a fully open position to a fully closed position. An elastic member sandwiched between the end surface of the keyboard lid on the rotation center side and the musical instrument body at a position lower than the rotation center of the lid;
A hole provided on the end surface of the keyboard lid on the side of the rotation center so as to open below the center of rotation, and a bendable rod member fixed to the instrument body so that the free end is inserted into the hole. When,
An elastic member, which is provided at the back of the hole portion and comes into contact with the tip end portion of the rod member before the keyboard lid is pivoted from the fully open position to the fully closed position.

According to the second aspect of the present invention having the above-mentioned structure, since the hole portion of the end face of the keyboard lid on the rotation center side is provided so as to open at a position lower than the rotation center, when the keyboard lid is opened. The opening of the hole moves in a direction away from the instrument body. Therefore, when the keyboard lid is opened from the fully closed position, the bar member comes out of the hole of the keyboard lid. At this time, since the elastic member tries to push the bar material out of the hole, the keyboard lid can be easily opened with a light force. Since the bar is bendable, the bar does not interfere with the opening / closing operation of the keyboard lid.

On the other hand, when the keyboard lid starts to be closed from the fully open position, contrary to the above case, the rod material enters the hole of the keyboard lid and before the keyboard lid is rotated to the fully closed position, the rod is closed. The tip of the material contacts the elastic member. Then, when the keyboard lid is further rotated to the fully closed position, the rod further penetrates deeply into the hole of the keyboard lid, so that the elastic member is compressed by the tip portion of the rod. Then, a repulsive force against the compression is generated in the elastic member, and the rod member receives a force in the direction pushed out from the hole by the elastic member, so that the keyboard lid moves in the closing direction at a slow speed. Therefore, the finger can be retracted before it is caught in the keyboard lid, or even if the finger is caught, no injury will occur.

When the safety device according to claim 2 is provided on a keyboard instrument, a hole is provided on the end surface of the keyboard lid on the side of the center of rotation, and a bar member is attached to the instrument body, and the free end of the bar member is provided with the hole. Since it can be inserted into the keyboard lid, it can be applied to a keyboard lid that is rotatably supported by a hinge, such as an upright piano.

As the elastic member, for example, a compression coil spring, a leaf spring, an air spring or an oil damper can be used. Further, a lump made of an elastic material such as urethane rubber can also be used. Here, in the invention of claim 2, the tip of the bar may be in contact with the elastic member with the keyboard lid in the fully open position. In such a case, however, the tip of the bar is elastic. Since the repulsive force from the member is added, an extra force is required to start closing the keyboard lid by that amount, and it becomes impossible to close it with a light force.

Therefore, in order to prevent such an inconvenience, it is preferable that the rod and the elastic member are separated from each other when the keyboard lid is completely opened. desirable. According to this, since the rod and the elastic member are separated from each other when the keyboard lid is completely opened, the elastic member is not biased by the elastic member. Therefore, when starting to close the keyboard lid from the fully open position, it can be closed with a light force, which is preferable.

Further, in order to more surely prevent the keyboard lid in the fully open position from being naturally closed, it is preferable to use a flexible tube as the rod member as described in claim 4. According to this, since a flexible tube having a small bending rigidity and being easily bent is used,
There is no risk of the keyboard lid being rotated in the closing direction by the elastic force of the bent tube, and safety is improved.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the keyboard lid safety device of the present invention is applied to an upright piano. FIG. 1 is a side sectional view showing a main part of an upright piano of this embodiment, and FIG. 2 is an explanatory view for explaining an opening / closing operation of a keyboard lid.

In the safety device 10 of the present embodiment, a hole 12c is provided on the end face 12b of the keyboard lid 12 on the side of the base end 12a, and a flexible member fixed to the inner roof 13 of the piano body is provided in this hole 12c. Tube 14 (hereinafter Tube 1
4) has been inserted. Further, a compression coil spring 16 (hereinafter referred to as a coil spring 16) is provided inside the hole 12c.

The keyboard lid 12 has a rear end 13a at the rear roof 13a.
It is rotatably attached via a hinge 18. When not playing, the keyboard lid 12 is closed to the fully closed position to cover the keyboard 20 as shown by the solid line, while at the time of playing, the keyboard lid 12 is completely opened to the fully open position to be closed by the chain double-dashed line.
To expose.

The hole 12c is an elongated hole having a circular cross section, which extends toward the tip side of the keyboard lid 12, and the opening 12 thereof.
“D” is located below the center of rotation 18a of the hinge 18, that is, the center of rotation of the keyboard lid 12. Coil spring 16
Is fixed to the inside of the hole 12c, but is not fixed to the tip of the tube 14.

The tube 14 is a flexible bellows tube made of metal, and its base end portion 14a is the end surface 13 of the inner roof 13.
It is fixed to a and is inserted into the hole 12c of the keyboard lid 12 so as to be freely inserted and removed. Next, the operation of this embodiment will be described.

The keyboard lid 12 in the fully closed position (state of FIG. 1)
2 is lifted and opened, as shown in FIG.
Since the opening 12d of 2c moves in the direction away from the inner roof 13 of the piano body, the tube 14 is bent and pulled out from the hole 12c in the direction of arrow A. At this time, since the coil spring 16 tries to push the tube 14 out of the hole 12c, the keyboard lid 12 can be easily opened with a light force. Then, as shown in FIG.
When the keyboard lid 12 is opened to the fully open position, the tip of the tube 14 is separated from the coil spring 16. Therefore, in this state, the repulsive force from the coil spring 16 is not applied to the tube 14.

On the other hand, when the keyboard lid 12 is started to be closed from the fully open position shown in FIG. 2B, the tube 14 is inserted into the hole 12c of the keyboard lid 12 contrary to the above operation. Then, when the keyboard lid 12 is rotated to the position shown in FIG. 2A, the tip of the tube 14 comes into contact with the coil spring 16. Further, when the keyboard lid 12 is rotated from the rotation position of FIG. 2A to the fully closed position of FIG. 1, the tube 14 further penetrates deeply into the hole 12c of the keyboard lid 12, so that the coil spring 16
Will be compressed by the tip of the tube 14. Then, a repulsive force against the compression is generated in the coil spring 16, and the tube 14 receives a force in the direction (arrow A direction) pushed out from the hole 12c by the coil spring 16, so that the keyboard lid 12 is It moves in the closing direction at a slow speed until it reaches the fully closed position of 1.

Therefore, as is clear from the above operation, when the keyboard lid 12 is accidentally rotated in the closing direction with the keyboard lid 12 completely opened, the keyboard lid 12 initially descends at a considerable speed. However, since the rotational speed of the keyboard lid 12 is regulated by the coil spring 16 after the keyboard lid 12 reaches the rotational position in FIG. 2, the finger is retracted before the finger is caught by the keyboard lid 12. You can do it, or you will not get hurt if your finger is caught.

As described above, the safety device 10 of this embodiment
When provided on a keyboard instrument, a hole 12c is provided on the end surface 12b of the keyboard lid 12, a tube 14 is attached to the inner roof 13 of the piano body, and the free end thereof is inserted into the hole 12c. Therefore, the present invention can be easily applied to the keyboard lid 12 which is rotatably supported.

Further, as shown in FIG. 2B, the keyboard lid 1
Since the tube 14 and the coil spring 16 are separated from each other when the tube 2 is completely opened, the repulsive force of the coil spring 16 is not applied to the tube 14. Therefore, there is an advantage that the keyboard lid 12 can be closed with a light force when starting to close it from the fully open position.

Further, in this embodiment, since the flexible tube 14 having a small bending rigidity and being easily bent is used,
When the keyboard lid 12 is in the fully open position, there is no risk of the keyboard lid 12 being rotated in the closing direction by the elastic force of the bent tube 14, which is advantageous in improving safety.

The embodiment of the present invention has been described above.
It is needless to say that the present invention is not limited to such embodiments and can be implemented in various modes without departing from the scope of the present invention. For example, in the above embodiment, the keyboard lid 12 is provided with the hinge 18 and the back roof 1
3 was rotatably attached, but the safety device of the present embodiment is applied to a grand piano in which the keyboard lid 30 is attached to the arm 34 through the pivot 32 as shown in the side view of FIG. You can also do it. In this case, a hole portion 36 is provided on the end surface 30a of the keyboard lid 30 on the side of the rotation shaft 32 so as to open to a position below the rotation shaft 32. A coil spring (not shown) may be provided. When fixing the flexible tube to the piano body, for example, the side surface 34a of the arm 34 is
The tube mounting block may be fixed to the above, or a tube mounting block member may be provided at a position facing the opening of the hole 36.

Further, as shown in FIG. 4, a compression coil spring 42 may be attached to the end surface 40a of the keyboard lid 40. In this case, when the keyboard lid 40 is closed from the fully open position, the compression coil spring 42 is sandwiched between the end surface 40a and the end surface 44a of the inner roof 44 before the keyboard lid 40 is rotated to the fully closed position. As a result, the keyboard lid 40 moves in the closing direction at a slow speed. So in this case,
Although it has a simple structure, the same effects as those of the above-described embodiment can be obtained.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a main part of an upright piano of an embodiment.

FIG. 2 is an explanatory diagram illustrating an opening / closing operation of a keyboard lid.

FIG. 3 is a side sectional view showing a main part of a grand piano of another embodiment.

FIG. 4 is a side sectional view showing a main part of an upright piano of another embodiment.

FIG. 5 is an explanatory diagram showing a conventional technique.

FIG. 6 is an explanatory diagram showing a conventional technique.

[Explanation of symbols]

10 ... Safety device 12 ... Keyboard lid 12a ... Base end part 12b ... End face 12c ... Hole part 12d ... Opening part 13 ... Deep roof 14 ... Flexible tube 16. ..Compression coil springs 18 ... Hinges 18a ... Center of rotation

Claims (4)

[Claims] 1. A keyboard lid rotatably attached to a musical instrument body, and a position below a center of rotation of the keyboard lid before the keyboard lid pivots from a fully open position to a fully closed position. 2. A safety device for a keyboard lid, comprising: an elastic member sandwiched between the keyboard lid and the instrument body. 2. A hole portion provided on an end surface of the keyboard lid on the side of the rotation center so as to open at a position lower than the rotation center, and fixed to the instrument main body so as to insert a free end into the hole portion. A bendable rod member, and an elastic member that is provided at the back of the hole and comes into contact with the tip end of the rod member before the keyboard lid rotates from the fully open position to the fully closed position. A safety device for the keyboard lid. 3. The safety device for a keyboard lid according to claim 2, wherein a tip end portion of the bar member is configured to be separated from the elastic member when the keyboard lid is completely opened. . 4. The keyboard lid safety device according to claim 2, wherein the rod is a flexible tube.