JPH04274295A - Cover for electronic musical instrument - Google Patents

Abstract

PURPOSE:To open or close a folding cover in an electronic musical instrument safely and smoothly at all times without entailing any damage to a panel surface and an impact to it. CONSTITUTION:A cover body 2 of an electronic musical instrument is formed into such a structure that comprises a front cover 3 of at least this side to a player and a rear cover 4 in the rear, and a rear end of the front cover 3 is rotatably connected to a front end of the rear cover 4, then a rear end of the rear cover 4 is rotatably connected to an electronic musical instrument body 1. Subsequently, a front end of a link member 7 is pivoted to the front cover 3, while the rear end is connected to the instrument body 1 via a coil spring 10 or an elastic body, and an intermediate part between both ends of the link member 7 is pivotally supported on a shaft 11 tightly installed in the instrument body 1.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a lid that can be opened and closed to cover a keyboard section, an operation panel section, etc. of an electronic musical instrument such as an electronic organ or an electronic piano.

0002

2. Description of the Related Art Electronic musical instruments having a keyboard, such as an electronic organ, are generally provided with a cover that can be opened and closed to cover and protect the keyboard section, operation panel section, etc. when not in use.

[0003] The lids of such electronic musical instruments are divided into two types: a sliding type lid that is disposed so as to be slidable in the front and back directions of the instrument body and stored inside the instrument body when the lid is opened, and a lid that is freely rotatable in the vertical direction. There is a rotatable lid that is attached and stands upright on the instrument body when the lid is opened.

However, the former sliding type lid is formed into a shutter-like shape by connecting a large number of lid constituent members in a series so as to be flexible, so the structure is complicated and the number of parts is large, resulting in high manufacturing costs. There is a problem with getting it on. On the other hand, the latter type of rotary lid can be manufactured at low cost since it can be manufactured as a single plate-shaped lid, and since it stands upright on the instrument body when the lid is opened, it can also be used as a music stand. It has the advantage that there is no need to secure space for storing the lid inside.

However, when the keyboard has two or more levels, the depth of the lid increases and its weight increases, making it difficult to open and close. There was a fear that he might get his hands tied. Furthermore, as the depth dimension is large, the surface area is also large, so when the lid is placed upright on the main body of the musical instrument when the lid is opened, there is a problem in that it gives a feeling of pressure to the player.

[0006] Therefore, for example, Utility Model Application Publication No. 61-128694
As seen in the publication, the lid body is constructed by hingedly connecting two lid components, one in front of the player and the other in the rear, and the rear end of the rear lid component is pivoted to the main body of the instrument. There is also a musical instrument in which the two lid components are folded and erected on the main body of the musical instrument when the lid is opened. In this case, there are those in which a guide surface is provided on the panel surface of the musical instrument body for guiding and sliding the front end of the lid component on the near side, and there are those in which there is no such restriction at all.

[0007]

[Problem to be Solved by the Invention] However, even when such a foldable lid is provided, it is difficult to open and close it by sliding the front end of the front lid component on the panel surface of the instrument body, as in the former case. If you do this, you will need protective tape or the like to prevent scratches on the panel surface.

[0008]Furthermore, the user may sometimes lift the lid upward without sliding it, and if this happens, the lid component will suddenly fold in the middle of opening the lid, and there is a risk that the user may get his or her hands caught. This point is especially true when there are no regulations at all, as in the latter case. In the latter case, there is a further problem that the movement of the lid is not constant, so there is a risk of damaging the panel surface, and there is also a lack of stability when opening and closing.

Furthermore, when the lid is opened, the front lid component bends and then suddenly rotates under its own weight and hits the rear lid component, giving an impact. In order to alleviate this impact, the lid described in the above-mentioned publication incorporates a spring that applies a force in the lid opening direction to the pivot joint of the two lid components. The problem arises that the member becomes difficult to break, and it feels strange when you start opening the lid.

[0010] The present invention was made in view of the above problems, and provides a foldable lid for an electronic musical instrument.
The purpose is to enable safe and smooth opening and closing at all times without damaging or impacting the panel surface.

[0011]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides the following lid for an electronic musical instrument. The lid, which is attached to the upper part of the main body of the electronic musical instrument so as to be openable and closable, includes at least a first lid component on the front side and a second lid component on the rear side with respect to the player, and the first lid component rotatably coupling the rear end and the front end of the second lid component;
The rear end of the second lid component is rotatably coupled to the electronic musical instrument body or the lid attachment member.

[0012] One end is pivotally connected to the first lid component, the other end is connected to the main body or the lid mounting member via an elastic body, and the intermediate portion between both ends is fixed to the main body or the lid mounting member. A link member is provided which is pivotally supported on the shaft.

[0013] Due to this link member, when the lid is closed, the first lid component and the second lid component extend approximately in one plane, and when the lid starts to open, the first lid component and the second lid component are The lid component rotates almost integrally with respect to the main body or the lid attachment member, and the first lid component rotates and bends with respect to the second lid component halfway, and the lid opens. In this state, the first lid component and the second lid component are configured to be folded in two.

[0014] The elastic body applies a biasing force in the opening direction to the lid through the link member to resist the rotational force in the closing direction due to its own weight. Furthermore, when the lid is on the closed side rather than half-open, it is preferable that the biasing force exerted by the elastic body is slightly smaller than the turning force in the closing direction due to the lid's own weight. Furthermore, a friction mechanism may be provided at a portion where relative displacement occurs between the lid and the main body of the electronic musical instrument or the lid attachment member.

[0015]

[Function] The lid of the electronic musical instrument according to the present invention configured as described above regulates the movement of each lid component of the lid body by the link member, and balances its own weight by the action of the elastic body. Therefore, by simply holding the front end of the first lid component and lightly lifting it, the lid body opens smoothly, naturally bends and folds, and even if you release your hand halfway, the lid opens completely semi-automatically.

[0016] If the elastic member damps the rotational force at the end of opening, it is possible to eliminate the occurrence of impact when the lid fully opens and hits the main body or the stopper member. Furthermore, the elasticity of the link member can absorb the impact caused by the collision of the lid constituent members when the lid body is fully folded in half.

When closing the lid, if you lightly pull the front end of the first lid component toward you, each lid component will naturally extend and rotate in the closing direction, and the biasing force or friction force due to its own weight and the elastic member will cause the lid to rotate in the closing direction. Once the balance is reached, the door will close slowly even if you release your hand.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 2 is a perspective view of an electronic musical instrument according to an embodiment of the present invention, seen diagonally from above with the lid closed.
3 is a side view showing only the essential parts in cross-section of the lid in three stages: fully closed, fully opened, and in the middle of opening and closing, and FIG. 3 is an enlarged view of the essential parts when the lid is fully opened.

In this electronic musical instrument, a lid 2 is attached to the upper part of a musical instrument body 1 so as to be openable and closable, and the lid 2 is connected to a front lid 3, which is a first lid component on the side nearer to the player. The rear lid 4 is a rear second lid component, and the rear end of the front lid 3 and the front end of the rear lid 4 are rotatably connected by a butterfly plate 5. The rear end is rotatably connected to the upper rear end of the musical instrument body 1 by a butterfly plate 6.

A pair of link members (levers) 7, 7 are arranged in parallel between the lid body 2 and the musical instrument main body 1 on both sides thereof.

Each of the link members 7 is formed of a somewhat elastic plate material (such as a steel plate) into an L-shape with one long arm, as best shown in FIG. is a support portion 3 protruding from the rear of the front lid 3.
a by a shaft 8, and its rear end 7b is connected to a fixing pin 9 in the instrument body 1 via a coil spring 10, which is an elastic body. The rear end side near the section 7c) is the shaft 1 fixed to the instrument body 1.
It is pivoted to 1.

Due to this link member 7, when the lid body 2 is closed, the front lid 3 and the rear lid 4 are in a state extending approximately in one plane as shown in FIG. 3
and the rear lid 4 rotate almost integrally with respect to the instrument body 1,
From the middle, the front cover 3 rotates and bends relative to the rear cover 4 as shown in FIGS. 1(B) to 1(D), and as shown in FIG. The movement of the front lid 3 and the rear lid 4 is regulated so that the lid 3 and the rear lid 4 are folded in half.

Further, the coil spring 10 applies a biasing force in the opening direction to the lid 2 via the link member 7 against the rotational force in the closing direction due to its own weight, thereby maintaining balance. Furthermore, when the lid 2 is in the state shown in FIGS. 1C and 1B, where the lid 2 is closer to the closed side than the half-open position shown in FIG. The turning force in the closing direction is made slightly smaller than that of the

According to this embodiment, (A
) When opening the lid 2 from the state where it is completely closed and covering the top surface of the instrument body 1, as shown in FIG. When the lid body 2 is lightly lifted, the balance between its own weight and the biasing force in the opening direction by the spring 10 allows the lid body 2 to open smoothly with just a slight force applied in the opening direction, and the front lid 3 is opened by the link member 7. is naturally bent and folded as shown in (C) → (D) → (E).

At this time, after passing the position (D), the coil spring 10 generates a biasing force in the closing direction;
→ This is enough to appropriately damp the movement of the lid 2 in the opening direction obtained by the step (D). In addition, even in the stationary state when fully closed (E), a force in the closing direction acts on the lid 2, but a force in the opening direction is applied due to the lid's own weight, so the lid maintains the open posture by balancing this force. can.

Therefore, even people with short hands (especially children) can easily open the lid, and there is no fear of damaging the panel surface or pinching fingers.

Also, when closing the lid, if the front end of the front lid 3 is slightly pulled toward you from the fully open state shown in FIG. Because of this, the front cover 3 and rear cover 4 naturally rotate in the closing direction.
When the weight of the lid body 2 exceeds the position shown in FIG. It rotates in the closing direction, passes through the state of (C) → (B), and then (A
) is fully closed.

[0028] A friction mechanism is provided at a portion where relative displacement occurs between the lid 2 and the electronic musical instrument main body 1 or the lid mounting member, such as a rotation axis, and the frictional force is applied to the rotation in the closing direction due to the own weight of the lid 2. It may also be used as a balancing force against the power.

Furthermore, the link member 7 is not limited to the L-shaped lever and can be modified in various ways, and the lid body 2 may be attached via a lid attachment member instead of being attached directly to the instrument body 1. Of course.

The electronic musical instrument to which this lid is attached is a stationary type (general electronic organ type) in which the musical instrument main body 1 is assembled onto legs 15 equipped with a speaker box, a pedal keyboard, etc., as shown in FIG. However, as shown in Figure 5, the instrument body 1
It is also possible to use a tabletop type, in which the instrument itself is placed on a tabletop and played.

Next, another embodiment of the present invention will be explained with reference to FIG. In FIG. 6, the same reference numerals are given to the parts corresponding to those of the above-described embodiment shown in FIGS. 1 to 4, and the explanation thereof will be omitted.

The embodiment shown in FIG. 6 is suitable for a large, deep electronic keyboard instrument that is equipped with a single keyboard, portamento fingerboard, etc. in addition to a two-tiered keyboard, or has a large number of control groups. The lid is made up of three foldable plate members.

That is, the top plate 20 covering the rear upper surface of the musical instrument body 1 is attached to the rear end of the butterfly plate 2 at the upper edge of the rear end of the musical instrument body 1.
1, the top plate 20 is used both as a lid mounting member and a third lid component, and a rear lid 4, which is a second lid component of the lid body 2, is attached to the front end of the top plate 20. The rear end portions are rotatably connected by a hinge 6.

Further, an arm 22 extending forward is provided on the lower surface of both sides of the front end of the top plate 20, and a coil spring 10 is engaged between the front end of the arm 22 and the rear end of the link member 7. Further, the shaft 11 that pivotally supports the link member 7 is also connected to the arm 2.
It is integrally fixed to 2. Rotatable stays 2 are interposed between the middle and both sides of the top plate 20 and the musical instrument main body 1.
3 is pivoted.

According to this embodiment, during normal performance, when the lid body 2 is opened by lightly lifting the front end of the front lid 3, as in the case of the previous embodiment, as shown by the solid line in FIG. The front cover 3 and the rear cover 4 are folded and opened to open the keyboard part, and the cover body 2 is erected above the rear part of the musical instrument body 1 in a state where it can be used as a music stand. In this state, special operators and the like remain covered by the top plate 20.

When it is desired to use the special operator provided on the underside of the top plate 20 or during maintenance, the top plate 2
0 rotates upward around the hinge 21 to the state shown by the imaginary line, and by locking the stay 23 with the upper part of the instrument body 1, the top plate 20 can be prevented from falling forward. can.

[0037] In this way, it is possible to play using special operators and to easily perform maintenance and inspection inside the musical instrument main body 1. Note that since the stay 23 is required to have a certain degree of strength, it is desirable to use a metal material such as steel or aluminum, but it is also possible to mold it integrally with the top plate 20 from resin.

In this example, the hinge 6 that connects the rear lid 4 and the top plate 20 restricts the rotation of the link member 7, and the front lid 3
Although the rear cover 4 is prevented from falling backward from the state shown by the imaginary line in FIG. 6, its rotation may be restricted by another member, or the restriction may be selectively released. The front cover 3 and the rear cover 4 may be rotated to a state where they overlap with the top plate 20.

In that case, even when the top plate 20 is closed, the front cover 3 and the rear cover 4 may be folded so as to overlap with each other and completely fall down, or the top plate 20 may be rotated significantly until it is tilted backwards. Alternatively, instead of using the stay 23, a stopper may be provided separately to restrict its rotation.

[0040]

As described above, according to the present invention, the foldable lid of an electronic musical instrument can be opened and closed safely and smoothly at all times without damaging the panel surface or applying impact. Furthermore, since the link member is almost invisible from the outside, opening and closing operations feel natural and are advantageous in terms of design.

[Brief explanation of the drawing]

1 is a side view illustrating three states in which the lid of the electronic musical instrument shown in FIG. 2 is fully closed, fully opened, and in the middle of opening and closing, with only the main parts in cross section.

FIG. 2 is a perspective view of an electronic musical instrument according to an embodiment of the present invention, viewed diagonally from above with the lid closed.

FIG. 3 is an enlarged view of the main parts when the lid is fully opened.

FIG. 4 is a side view showing an example of a stationary electronic musical instrument equipped with a lid according to the present invention.

FIG. 5 is a side view showing an example of a tabletop electronic musical instrument equipped with a lid according to the present invention.

FIG. 6 is a side view of an electronic musical instrument showing another embodiment of the present invention.

[Explanation of symbols]

1, 1'... Musical instrument body, 2... Lid body, 3... Front lid (first lid component), 4... Rear lid (second lid component), 5, 6... Hinge,
7... Link member, 10... Coil spring (elastic member)
, 11... Axis, 15... Legs, 20... Top plate (lid attachment member and third lid constituent member), 21... Hinge, 22... Arm, 23... Stay

Claims (3)

[Claims] 1. A lid body that is openably and closably attached to the upper part of the main body of an electronic musical instrument includes at least a first lid component on the front side and a second lid component on the rear side with respect to the player, and the first lid The rear end of the component and the front end of the second lid component are rotatably coupled, the rear end of the second lid component is rotatably coupled to the main body or the lid attachment member, and one end is pivotally connected to the first lid component, the other end is connected to the main body or the lid mounting member via an elastic body, and the intermediate portion between the two ends is connected to a shaft fixed to the main body or the lid mounting member. A pivotally supported link member is provided, and when the lid is closed, the first lid component and the second lid component are in a state extending substantially in one plane, and when the lid starts to open, The first lid component and the second lid component rotate almost integrally with respect to the main body or the lid attachment member, and the first lid component rotates with respect to the second lid component halfway. When the lid is bent and the lid is open, the first lid component and the second lid component are configured to be folded in half;
A lid for an electronic musical instrument, characterized in that the elastic body applies a biasing force in an opening direction to the lid through the link member to resist a turning force in the closing direction due to its own weight. 2. In the lid of an electronic musical instrument according to claim 1, when the lid is on the closed side rather than half-open, the biasing force by the elastic body is slightly smaller than the rotational force in the closing direction due to the lid's own weight. A lid for an electronic musical instrument characterized by: 3. The lid of an electronic musical instrument according to claim 1, further comprising a friction mechanism provided at a portion of relative displacement between the lid and the main body of the electronic musical instrument or the lid mounting member. lid.