JPH0446310Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to a lid opening/closing device suitable for use in keyboard instruments such as electronic organs, and in particular allows the keyboard lid to be moved back and forth almost horizontally. It is.

[Prior Art] Conventionally, a so-called slide lid (Example Publication No. 48-29155), which is disposed so as to be slidable in the front-rear direction, has been known as a keyboard lid for an electronic organ or the like.
This sliding lid is a shutter-like structure in which multiple lid components are connected in a series so as to be flexible, and both ends of the sliding lid are linear or curved in the front-rear direction along guide grooves provided on the inner surface of the instrument body. It is configured to open and close a keyboard section and an operator section such as a clapboard by sliding the keyboard section.

[Problem that the invention attempts to solve]

However, since such conventional keyboard lids have a simple structure in which both ends are guided and held by guide grooves, they tend to rattle easily, especially in thin and lightweight ones. If an attempt was made to reduce the rattling by reducing the gap between the groove and the keyboard lid, the friction between the two would increase, making it impossible to move smoothly. In addition, this type of sliding lid requires a plurality of lid components and a connecting member to connect them to each other in a flexible manner, so the structure of the lid itself is complicated and manufacturing and assembly work is troublesome. On top of that, there was the inconvenience that if you didn't apply even pressure with both hands, it would become distorted and wouldn't move.

[Means for solving problems]

The lid opening/closing device for a keyboard instrument according to this invention has been made in view of the above-mentioned points, and includes a lid body that is made of a flat plate and opens and closes an opening on the top surface of the instrument body by moving in the front and back direction, and a support member provided on both sides of the musical instrument body to slidably support the lid; and a first link member provided on both sides inside the musical instrument body, one end of which is rotatably connected to the musical instrument body. , a pair of link mechanisms each having a second link member rotatably connecting the other end of the first link member and one end thereof, the other end extending toward the rear side of the lid; A connecting rod that connects and fixes the other ends of the second link members of the pair of link mechanisms and is rotatably supported on the rear side of the lid body, and a connecting rod that is provided on both sides of the inside of the instrument main body and connects the connecting rod. a pair of guide members that guide both ends of the rod in the front-rear direction, and when the lid body is opened and closed along the support member, the pair of links are moved as the connecting rod is guided by the guide members. The mechanism is designed to rotate.

[Effect]

This design consists of a pair of link mechanisms whose middle portions are connected by a connecting rod, and a guide member that guides and holds the connecting rods in the front-rear direction, ensuring reliable force transmission and preventing the lid from rattling. can be moved in parallel smoothly, and the structure of the lid itself does not require a shutter-like structure.

〔Example〕

This invention will be described in detail below based on embodiments shown in the drawings.

FIG. 1 is a side sectional view showing an embodiment of an electronic musical instrument equipped with a lid opening/closing device according to this invention, FIG. 2 is a plan view of the keyboard lid, and FIG. 3 is a side sectional view of the device.
In these figures, a musical instrument main body 1 includes a bottom plate 2,
A pair of left and right side plates 3, a top plate 4, a lower opening bar 5,
It is formed into a horizontally elongated shallow box shape with a back plate 6, a keyboard lid 30 that can be opened and closed, etc., and inside thereof is a keyboard 8 consisting of a large number of white keys 8a and black keys 8b corresponding to each pitch,
A pair of left and right mountain plates (supporting members) 10 fixed to the inner surface of each side plate 3 and located on both sides of the keyboard 8.
A pair of left and right link mechanisms 40, a guide member 60, etc., which constitute a keyboard lid opening/closing device 7 that holds the keyboard lid 30 so as to be openable and closable in the front and rear directions, are disposed.

The keys 8a and 8b are arranged in parallel on a keyboard frame 12 disposed on the front and rear upper surfaces of the front and rear bottom plates 2, with their rear ends supported by support members 13 so as to be rotatable in the vertical direction. When the front end rotates and descends in response to the operation, the actuator 14 lowers as a unit and operates the key switch 22 disposed on the lower surface of the keyboard frame 12, thereby electrically disconnecting the instrument corresponding to the key. is configured to occur. Each key 8a, 8b is given a clockwise rotation habit in FIG.
It is latched at the initial position by normally abutting against. The keyboard holder 15 is suspended horizontally between the pair of mountain plates 10 and covers the rear end of the keyboard 8, and has a rotating volume, a tone volume,
Various operating knobs 16 such as a power switch are provided to form an operating unit.

Each of the mountain plates 10 extends long in the front-rear direction, and the upper surface of the front end thereof is inclined forwardly downward at an appropriate angle, thereby forming a supporting portion 17 of the keyboard lid 30 when the lid is closed.
, and the upper plate 4 is located behind this support portion 17.
A keyboard lid locking recess 18 is formed forward of the front end of the keyboard.

A music stand 19 that can be folded backwards and a non-slip member 20 that prevents the music from slipping are disposed on the top plate 4.

Now, when not in use, the opening 2 of the instrument body 1
The keyboard lid 30, which can be freely pulled out and covers the keyboard 8 and protects the keyboard 8 and the operation knob 16, is made of a single plate, and the front and rear ends are each made of aluminum or the like formed by pressing or the like. Reinforcing metal fittings 31 and 32 are fitted and fixed over the entire width, and on the lower surface of the front side reinforcing metal fitting 31, there is a reinforcing metal fitting 31 that comes into contact with the upper surface of the lower opening rod 5 and covers the front end surface of the keyboard 8 when the lid is closed. A hanging piece 33 is integrally provided. Slide rubbers 34 are respectively attached to both ends of the hanging piece 33 in order to prevent falling noise when it comes into contact with the lower opening rod 5 and to prevent scratches on the sliding surface. As shown in FIG. 4, the slide rubber 34 is formed into a substantially inverted L shape, and its upper end 34a is attached to the end surface of the hanging piece 33, and its lower end 34b is attached to the end surface of the hanging piece 33.
is pasted on the back of the overhanging portion 33.

On the other hand, the upper ends of supporting metal fittings 36 are fixed to both ends of the rear reinforcing metal fittings 31, and the respective link mechanisms 40 are fixed to the lower ends of these supporting metal fittings 36.
The upper ends of the two are connected via a connecting rod 47. Each of the link mechanisms 40 includes a first link 43 whose lower end is rotatably connected to the bracket 41 via a connecting pin 42 in the front-rear direction, and a lower end which is connected to the upper end of the first link 43 via a connecting pin 44. A second link 45 is connected in the front-rear direction, and the upper end of the second link 45 is fixed to a connecting rod 47. The connecting rod 47 is the upper end of the pair of left and right link mechanisms 40,
That is, it connects the second link 45,
It is formed into a substantially crank shape (〓), and its both ends are inserted into the lower ends of a pair of left and right support fittings 36 fixed to both side ends of the reinforcing metal fitting 32, respectively, and are rotatably supported. . Further, both ends of the connecting rod 47 are inserted and held in guide grooves 61 of each guide member 60 that is provided on the inner surface of each of the mountain plates 10 and extends substantially horizontally in the front-rear direction.

The bracket 41 is arranged and fixed on the bottom plate 2 and is located below the substantially center of the guide member 60. However, in order to avoid mutual interference between the link mechanism 40 and the guide member 60, the bracket 41 is disposed to be shifted toward the center of the instrument body 1 from the guide member 60, and the upper surface of the bottom plate 2 on the front side of the bracket 41 is A long groove 70 is formed corresponding to the first link 43.

In this electronic musical instrument with a twisting configuration,
When the keyboard lid 30 is closed, both sides of the lower surface of the front half are placed on the sloping upper surfaces of the pair of left and right mountain plates 10, that is, on the support portions 17, so that the keyboard lid 30 is tilted forward and downward, and opens into the opening of the instrument body 1. He wears 23. At this time, the first link 43 of each link mechanism 40
is located on the front side of the bracket 42 and maintains a substantially horizontal state as shown by the solid line in FIG.
It is in contact with the front wall of 1. The first link 43 and the second link 45 are bent in a substantially dogleg shape. In this state, when the front end of the keyboard lid 30 is lifted and slid backward, the top surface of the mountain plate 10 changes its posture from an inclined state to a nearly horizontal state, and the keyboard lid 30 moves along the bottom surface of the top plate 4 into the instrument body 1. is stored in.

That is, lift the keyboard lid 30 and remove the hanging piece 33.
When the keyboard lid 30 is placed on the support portion 17 of the mountain plate 10 and slid rearward in this state, the front end side of the keyboard lid 30 gradually rises until it becomes almost horizontal. At this time, as the keyboard lid 30 slides, the connecting rod 47 starts to move backward along the guide groove 61, and the connecting pin 42
There is a gap between the two. Therefore, at the beginning of the movement, the connecting pin 44 descends, and the first link 43 rotates counterclockwise around the connecting pin 42 as shown by the chain line a ₁ and enters the long groove 70 , and the keyboard lid 30
When it is retracted to a certain size, it starts to rise and the chain line
Rotate clockwise as shown by a ₂ and a ₈ . On the other hand, the second link 45 is rotated clockwise around the connecting pin 44 as the keyboard lid 30 is stored.
When the keyboard lid 30 is retracted almost halfway, the first
The angle formed with the link 43 becomes the minimum, and then gradually increases again. When the connecting rod 47 comes into contact with the rear wall of the guide groove 61, the keyboard lid 30
is completely housed within the instrument body 1.

Here, since the keyboard lid 30 is not given any movement behavior in the opening or closing direction by a spring or the like, when the keyboard lid 30 is released at an arbitrary position during the opening/closing operation, it will stop at that position. In addition, the keyboard lid 30 has a hanging piece 3.
3 moves along the top surface of the mountain plate 10, so that opening and closing operations are performed smoothly.
The drop gives a click feeling when opening and closing. Moreover, when the keyboard lid 30 is stopped at the position of this recess 18, the keyboard presser 1
The operator 16, which is disposed on the rear end side of the upper surface of the player 5 and is not operated during performance, can be covered by the hanging piece 33.

According to the keyboard lid opening/closing device 7 having such a configuration, the keyboard lid 30 can be moved almost horizontally and stored along the lower surface of the top plate 4, so that the keyboard lid 30 can be folded into one plate. The structure is simple, and the instrument body 1 can be made thinner. Furthermore, since the pair of left and right link mechanisms 40 that hold the keyboard lid 30 operate synchronously by being connected by the connecting rod 47, no matter which point on the keyboard lid 30 is used to open or close the keyboard, the The lid 30 can be smoothly translated in the front-back direction.

In addition, the connecting rod 47 is formed in a substantially crank shape, and the U-shaped portion 47a thereof is mounted so that it gradually rises as the keyboard lid 30 is stored in the instrument body 1, as shown by the chain line in FIG. By being fixed to the second link 45 at an angle, the bottom plate 2
Mutual interference with tall electric components (not shown) such as a transformer disposed at the center of the upper surface of the connecting rod 47 can be prevented, and the lower part of the movement area of the connecting rod 47 can be effectively utilized.

[Effect of idea]

As described above, according to the lid opening/closing device for a keyboard instrument according to this invention, the lid has a simple structure, can be smoothly translated in the front and back direction, and can be stored within the main body of the musical instrument. Furthermore, the pair of link mechanisms that hold the keyboard lid have a simple structure and can be manufactured at low cost.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view showing an embodiment of an electronic musical instrument equipped with a keyboard lid opening/closing device according to this invention, FIG. 2 is a plan view of the keyboard lid, and FIG. 3 is a side sectional view of the keyboard lid opening/closing device. FIG. 4 is a perspective view of the main parts of the keyboard lid. DESCRIPTION OF SYMBOLS 1... Instrument body, 2... Bottom plate, 7... Keyboard lid opening/closing device, 8... Keyboard, 10... Mountain board, 30... Keyboard lid, 40... Link mechanism, 43... First link, 45 ...Second link, 47...Connecting rod, 60
...Guide member.

Claims (1)

[Claims for Utility Model Registration] A lid body that is made of a flat plate and opens and closes an opening on the top surface of the musical instrument body by moving in the front-back direction; and a lid body that is provided on both sides of the musical instrument body and that allows the lid body to slide freely. a supporting member for supporting the musical instrument;
A first link member whose one end is rotatably connected to the musical instrument body; the other end of the first link member is rotatably connected to the first link member, and the other end extends toward the rear side of the lid. a pair of link mechanisms, each having a second link member extending out; and a pair of link mechanisms, the other ends of the second link members of the pair of link mechanisms being connected and fixed together, and rotatably supported on the rear side of the lid body. a connecting rod; and a pair of guide members provided on both sides of the interior of the musical instrument body and guiding both ends of the connecting rod in the front-rear direction, the guide member being provided with a pair of guide members for guiding both ends of the connecting rod in the front-back direction, when the lid body is opened and closed along the supporting member. A lid opening/closing device for a keyboard instrument, characterized in that the pair of link mechanisms rotates in accordance with movement of a connecting rod guided by the member.