JP3067193B2 - Electronic musical instrument lid opening and closing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover opening / closing device for covering an operation unit located behind a keyboard of an electronic musical instrument.

2. Description of the Related Art In recent years, with the development of electronic technology, electronic musical instruments have become increasingly multifunctional and sophisticated, so that the number of operation buttons has increased and the operation has become more complicated. With orientation, the appearance has been emphasized. For this reason, an open / close lid is provided on the operation part of the electronic musical instrument, and setting of tone and effect can be performed by opening the lid, and by closing the lid, the operation part can be played without being seen. There are many things.

Hereinafter, an example of the above-described conventional lid opening and closing device for an electronic musical instrument will be described with reference to the drawings.

FIG. 5 is a perspective view showing the overall structure of the electronic musical instrument.
Reference numeral 52 denotes an openable / closable cover that covers an operation unit provided behind the keyboard 51.

6 and 7 are side views of a conventional lid opening / closing device for an electronic musical instrument. FIG. 6 shows a state in which the operation unit lid is closed, and FIG. 7 shows a state in which the operation unit lid is opened.

In FIG. 6, reference numeral 53 denotes an operation panel having an operation unit. An operation unit cover 54 covers the operation unit. Reference numeral 55 denotes a fulcrum for opening and closing the operation unit cover 54, and is fixed to the operation panel 53. Reference numeral 56 denotes a spring fixing plate fixed to the operation panel 53. 57 is a spring movable plate, which is fixed to the operation unit cover 54. Reference numeral 58 denotes a tension spring, which includes a spring fixing plate 56 and a spring movable plate.
It is hooked on 57.

In FIG. 7, reference numeral 54a denotes a trajectory when the operation unit cover 54 is rotated, and 57a denotes a spring movable plate 5 when the operation unit cover 54 is rotated.
It is the locus of 7. 59 is the operation unit cover 5 when the operation unit cover 54 is opened.
This is a stopper that comes into contact with 4.

The operation of the opening / closing mechanism of the operation unit lid configured as described above will be described below.

When the operation unit cover is closed as shown in FIG. 6, the gravity of the operation unit cover is larger than the tension of the tension spring 58.
Can be covered without floating.

In the state in which the operation unit cover is opened as shown in FIG. A switch (not shown) enables setting of tone color, effect, and the like.

However, in the above-described conventional configuration, the balance between the gravity of the operation portion cover 54 and the tension of the tension spring 58 causes the operation portion cover
When the operation unit cover 54 is opened and closed with a strong force, the operation unit cover 54 hits the stopper 59 and generates a loud collision sound. May occur, and the operation unit cover 54 may rebound to stop at a predetermined position. In addition, when the operation unit cover 54 is opened, there is a drawback that there is no sense of locking and it is difficult to determine whether or not it has stopped at a predetermined position.

The present invention solves the above-mentioned conventional problems. Even when the operation unit lid is opened and closed with a strong force, the collision sound is small, there is no rebound, the vehicle stops at a predetermined position, and the vehicle stops at an open position. It is an object of the present invention to provide a lid opening and closing device for an electronic musical instrument that can be understood.

Means for Solving the Problems In order to solve the above problems, the lid opening and closing device of the electronic musical instrument of the present invention has a tension spring for reducing gravity at the time of opening and closing the lid, one end is fixed to the lid, and the other end is fixed to the lid. One end is fitted to the other end of the spring movable part and firmly fixed to reduce the opening / closing speed of the lid near the start position and the completion position of the opening / closing operation of the lid. Air damper
And an adsorbing portion that adsorbs to a part of the spring movable portion at the opening completion position of the lid and prevents the operation of the lid in the opening direction.

Action With this configuration, even if the lid is opened and closed with a strong force, the tension of the lid is reduced by the tension spring, and the opening and closing speed of the lid near the start position and the completion position of the opening and closing operation is reduced by the air damper. Can be reduced so that a collision sound in which a part of the spring movable portion hits the suction portion at the completion position can be reduced. In addition, since the lid is held by the suction portion while giving a sense of locking the lid at the opening completion position of the lid, it is easy to determine the opening completion position.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a state in which an operation unit cover at one end in an embodiment of the present invention is closed.

In FIG. 1, reference numeral 1 denotes an operation panel having an operation unit. An operation unit cover 2 covers the operation unit. Reference numeral 3 denotes a fulcrum when the operation unit cover 2 is opened and closed, and is fixed to the operation panel 1. Reference numeral 4 denotes an air-damper fixing bracket, which is fixed to the operation panel 1. Reference numeral 5 denotes an air-damper-holding member, which is fixed to the air-damper-fixing member 4. 6
Is a spring movable plate, which is fixed to the operation unit cover 2. 7
Is an air damper, and the fixed end 7d is inserted into both the hole 4a of the air damper fixing metal 4 and the hole 5a of the air damper holding metal 5, and the screw 8 is used for the air damper holding metal 5. Is fixed to the air-damper fixing bracket 4. The movable end 7e of the air damper 7 is hooked on a winding bush 9 attached to the spring movable plate 6. Reference numeral 10 denotes a tension spring which is hooked on the air-damper-holding member 5 and the spring movable plate 6.

FIG. 2 shows an embodiment of the present invention in a state where the same operation unit cover as that of FIG. 1 is opened.

In FIG. 2, reference numeral 2a denotes a trajectory when the operation unit cover 2 is rotated. 7a is an air damper when the operation unit cover 2 is rotated.
7 is the locus. Reference numerals 7b and 7c denote rod portions of the air damper 7, which indicate a stall state at the start and at the end.

FIG. 3 shows a state in which the operation unit cover at the other end in the present embodiment is closed.

In FIG. 3, reference numeral 11 denotes a spring fixing plate, which is fixed to the operation panel 1. 12 is a magnet catch,
It is fixed to a spring fixing plate 11.

FIG. 4 shows a state in which the same operation end cover as that of FIG. 3 in the present embodiment is opened.

In FIG. 4, when the operation unit cover 2 is rotated, the magnet portion of the magnet catch 12 fixed to the spring fixing plate 11 is rotated.
12a shows a state where the bent portion 6b of the spring movable plate 6 is attracted. 2a is a locus when the operation unit cover 2 is rotated. 6a is a trajectory of the spring movable plate 6 when the operation unit cover 2 is rotated.

The operation of the opening / closing device for the operation unit lid of the electronic musical instrument configured as described above will be described below.

First, after having a tension force curve substantially equal to the gravity increase curve generated by the gravitational movement of the operation unit cover 2, the elastic force of the spring is made slightly weaker than that of the operation unit cover 2 to generate a floating when closed. The operation unit cover 2 is controlled by a tension spring 10
The fixed end 7d of one air-damper 7 provided at one end of the operation unit is placed in the hole 4a of the air-damper-fixing bracket 4 and the hole 5a of the air-damper-holding bracket 5 while reducing the feeling of gravity. Is rotatable, and the movable end 7e is fitted into the winding bush 9 by elastic force to be slidably held. The rod portions 7b and 7c extend and contract immediately before the opening / closing completion position of the operation unit lid 2 to generate a damper effect, thereby causing a stall action near the beginning and end of the opening / closing operation. In the middle position of the rotation of the operation unit cover 2, the rod of the air damper 7 is in a contracted state, has no damper effect, and is smoothly rotated (see FIG. 2). Further, the bent portion 6 of the spring movable plate 6 is attached to the magnet portion 12a of the magnet catch 12 provided at the other end.
By sucking the b, a feeling of locking of the operation unit cover 2 in the opening direction is imparted, the holding force in the open position is maintained, and the stopper in the opening direction is used (see FIG. 4).

As described above, according to this embodiment, the stall action is generated near the start and end of the opening / closing operation by the tension spring for reducing the feeling of gravity of the operation unit lid and one air damper provided at one end. , Eliminates the collision sound of the operation unit lid,
Floating due to bouncing can be prevented. The magnet catch provided at the other end gives a sense of locking at the open position of the operation unit cover, maintains the holding force at the open position, serves as a stopper in the opening direction, and stops at the open position of the operation unit cover. Can be determined. In the present embodiment, the tension spring is divided into two in order to prevent the operation unit cover from being twisted, but it is also possible to configure the tension spring with one.

Advantageous Effects of the Invention As described above, according to the present invention, a tension spring that reduces the gravity at the time of opening and closing the lid, and an air that reduces the opening and closing speed of the lid near the start position and the end position of the opening and closing operation of the lid. A damper, and a suction portion for adsorbing a part of the spring movable portion at the opening completion position of the lid, so that the impact sound of the lid and the suction portion at the opening completion position is reduced to reduce the impact sound of the lid. Since a sense of locking can be imparted, it is easy to determine whether the lid has been opened to a predetermined position (opening completed position).

[Brief description of the drawings]

1 and 2 are left side views of a lid opening / closing device for an electronic musical instrument according to an embodiment of the present invention. FIGS. 3 and 4 are right side views of the lid opening / closing device for an electronic musical instrument according to the embodiment of the present invention. FIG. 5 is a perspective view showing the overall structure of the electronic musical instrument, and FIGS.
The figure is a side view of a conventional lid opening and closing device for an electronic musical instrument. 2 ... Operation unit cover, 6 ... Spring movable plate, 7 ... Air damper, 10 ... Tension spring, 12 ... Magnet catch.

Continuation of the front page (56) References Japanese Utility Model 3-8392 (JP, U) Japanese Utility Model 62-6796 (JP, U) Japanese Utility Model 57-4570 (JP, U) Japanese Utility Model 60-4229 (JP) , Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) G10B 3/00 G10C 3/02 G10C 3/12 G10H 1/32

Claims (1)

(57) [Claims] A tension spring for reducing gravity when the lid is opened and closed, a spring movable part having one end fixed to the lid and holding one end of the tension spring at the other end, and opening and closing the lid. One end is fitted to the other end of the spring movable part to rotate so as to reduce the opening / closing speed of the lid near the start position and the end position of the operation, and the opening of the lid is completed. A lid opening / closing device for an electronic musical instrument, comprising: a suction portion that is attracted to a part of the spring movable portion at a position and prevents the lid from moving in the opening direction.