JP3226795B2 - Speaker mounting structure for electronic musical instruments - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an electronic musical instrument.
This relates to a mosquito mounting structure.

[0002]

2. Description of the Related Art An electronic musical instrument is provided with a speaker which is sounded in accordance with the performance of a player. This speaker is usually arranged on the main body below the keyboard table, and is arranged below the keyboard table.
The mosquito is the large main speaker.

[0003] The sound radiated from the main speaker is a keyboard key.
And is not well transmitted to the performer's ears,
The performer will hear a different sound than the actual radiated sound from the main speaker. For this reason, a sub-speaker for a player, that is, a monitor, is often provided separately at a position higher than the keyboard table so that a sound can be produced toward the player from a position higher than the keyboard table. I have.

The position where the above sub-speaker is provided is as follows.
Conventionally, there is a mode as shown in FIGS. FIG. 5 shows that a speaker (sub-speaker) 53 is disposed forward and upward in the main body 50 immediately below a keyboard lid 52 located rearward of the operation panel 51 and in an open position. is there.
The sound radiated from the speaker 53 is transmitted to the operation panel 51.
Through the gap 54 between the rear end and the front end of the keyboard lid 52 in the open position, the sound is transmitted to the front, that is, to the player.

FIG. 6 shows a state in which a speaker 53 is attached to the lower surface of an operation panel 51. In this case, the operation panel 5
In FIG. 1, a slit 57 through which sound emitted from the speaker 53 passes is separately formed.

FIG. 7 shows a state in which a speaker 5 is provided between a keyboard lid 52 at an open position and a top plate 55 of the main body 50 in the main body 50.
3 is disposed forward and upward. The upper front plate 56 located in front of the speaker 53 is
A slit 57 for passing the sound radiated from is formed separately.

FIG. 8 shows a slit 5 compared to FIG.
7 is covered with a mesh 58 or the upper front plate 56 itself is entirely made of a mesh 58.

[0008]

However, in the case of FIG. 5 described above, since the gap 54 is a path curved in a crank shape, the radiated sound from the speaker 53 transmitted to the performer is Due to interference or the like, the radiated sound from the speaker 53 is considerably different from the actual radiated sound. In particular, a particular frequency range is emphasized or weakened,
This is problematic in terms of sound quality.

In the case of FIGS. 6 to 8, it is necessary to separately form a slit 57 through which the sound radiated from the speaker 53 passes, or to provide a separate mesh 58, so that the cost and appearance can be improved. Is problematic in terms of In particular, members located at positions higher than the keyboard table 59 are provided with slits 57 and meshes 5 because the appearance is important.
The design itself that intends the existence of the speaker 8 and the speaker 53 cannot be ignored.

The present invention has been made in view of the above circumstances, and has as its object to provide an electronic musical instrument that emits good sound from speakers and that is excellent in terms of cost and appearance. To provide a speaker mounting structure.

[0011]

Means for Solving the Problems In order to achieve the above object, the solution of the present invention is as follows.
That is, in an electronic musical instrument having a passage gap through which a keyboard cover displaced toward an open position passes below an upper front plate extending below a front end of a top plate of the main body, A speaker is provided downward between the keyboard cover and the top plate at a position.

According to the present invention, the sound radiated from the speaker is reflected on the upper surface of the keyboard cover in the open position, and is formed between the keyboard cover and the upper front plate in the passage gap. Since the sound reaches the player through the upper gap and the transmission path of the radiated sound is simple, the radiated sound from the speaker reaches the player without being modulated on the way, and the sound quality is improved. There will be no problems. The sound radiated from the loudspeaker is directed to the front, that is, to the performer by using the gap for passage between the keyboard cover at the open position and the upper front plate, which has conventionally existed. Need not be formed. Also,
Since the player hears the reflected sound, it is difficult for the player to feel the presence of the speaker in front of the player.

A preferred embodiment based on the above solution is as follows. (1) The speaker may be disposed so as to face downward and forward. In this case, a more preferable position of the speaker is provided, which is preferable in that the effects of the present invention can be sufficiently exhibited.

(2) On the premise of the above (1), the sound radiated from the speaker is reflected on the upper surface of the keyboard cover in the vicinity of the passage gap, and the keyboard cover is included in the passage gap. And the upper front plate is set so as to reach the front of the upper front plate through an upper gap between the upper front plate and the upper front plate. In this case, the transmission path of the sound radiated from the speaker is specified more specifically, and the effect of the present invention can be sufficiently exhibited.

(3) On the premise of the above (2), the center of the vibration surface of the speaker is set so as to be located behind the middle position in the front-rear direction of the main body. it can. In this case, there is provided a preferable front-to-back arrangement position of the speaker for ensuring the transmission path of the sound radiated from the speaker in the above (2).

(4) On the premise of claim 1 and the above (1) to (3), the keyboard cover is displaced slightly forward from the fully open position within a range that does not hinder key operation, and the intermediate open position is stabilized. The radiating sound from the speaker passing through the upper gap is set different between the fully open position and the intermediate open position of the keyboard cover. can do. In this case, the sound quality heard by the player can be adjusted by changing the state of reflection of the sound emitted from the speaker on the upper surface of the keyboard by a simple method of changing the position of the keyboard.

(5) On the premise of the above (4), the following can be performed between the fully open position and the intermediate open position. That is, as the inclination angle of the keyboard lid is different,
Or, as the area of the portion where the radiated sound from the speaker is reflected on the upper surface of the keyboard lid is different, or the vertical dimension of the upper gap is different,
can do. In this case, any one of the above-described different aspects or a combination of any two or more of the different aspects can be used, and all the different aspects can be satisfied.

(6) On the premise of the above (5), the keyboard cover may be provided with holding means for stably holding the keyboard cover at the intermediate open position. in this case,
This is preferable in that the keyboard cover is stably held at the intermediate open position by using a separately provided holding means.

(7) On the premise of the above (6), the front end portion of the keyboard cover extends over substantially the entire length in the left-right direction of the keyboard cover and extends downward to cover the front surface of the key. And the holding means is formed on the inner surface of the left and right side walls of the keyboard table, and is formed as a concave portion with which the downwardly extending portion is engaged. In this case, the keyboard cover can be stably held at the intermediate open position by effectively utilizing the downwardly extending portion formed at the front end of the conventional keyboard cover.

(8) On the premise of the above (6), the keyboard key
On the inner surfaces of the left and right side walls of the bull, when opening and closing the keyboard cover, a clasp is disposed which restricts the keyboard cover from displacing downward by a predetermined amount or more and prevents the keyboard cover from abutting on a key,
The holding means may be formed on an upper surface of the clap, and may be a locking portion for locking the left and right front ends of the keyboard cover at the intermediate open position. In this case, the holding means can be configured by effectively using the beat tree.

(9) On the premise of the above (8), a front end of the keyboard cover extends over substantially the entire length in the left-right direction of the keyboard cover and extends downward to cover the front surface of the key. The locking portion formed on the upper surface of the beater tree is set as a concave portion, and the concave portion is formed so as to gradually and smoothly increase from the very short bottom in the front-rear direction in both the front and rear directions. In the intermediate opening position, the downwardly extending portion may be located at the bottom. In this case, it is possible to smoothly perform the displacement of the keyboard cover from the intermediate open position in the opening direction or the closing direction while effectively using the lower extension portion and the clasp that are formed at the front end of the conventional keyboard cover. it can. In addition, the keyboard cover can be easily and reliably set to the middle open position.

(10) On the premise of the above (4) to (9), an operation panel is provided at a position just above the rear end of the key and below the upper front plate. A vertical gap between the rear panel and the operation panel is set as the passage gap, and the intermediate open position is a position where the keyboard is almost entirely covered by the keyboard cover. be able to. In this case, a specific state of the intermediate open position is provided.

(11) On the premise of claim 1 and (1) to (10), a rack for guiding the opening and closing of the keyboard cover is disposed in the main body so as to extend in the front-rear direction, and the keyboard cover is provided. A pinion that meshes with the rack is rotatably held at the rear end of the rack. In this case, using the appropriate rotation resistance using the rack and the pinion, in order to smoothly open and close the keyboard lid, that is, to prevent rattling or to open and close the keyboard lid unexpectedly vigorously. This is preferable for preventing such a situation.

(12) On the premise of the above (11), the rack is fixedly installed on the inner surfaces of the left and right side walls of the main body with the tooth surface thereof facing upward, and is respectively provided on the left and right rear ends of the keyboard cover. , The pinion is held. In this case, it is preferable to obtain more effectively using a pair of left and right racks and a pinion. It is also preferable for firmly supporting the rear end of the keyboard lid by using a rack.

[0025]

According to the present invention, it is possible to improve the sound quality heard by a player, and to provide a sound apparatus which has no problem in terms of cost and appearance. Further, since the player hears the reflected sound, it is preferable in that the presence of the speaker is not felt.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIGS. 1 to 4, reference numeral 1 denotes a main body, which has a small width in the front-rear direction (the direction perpendicular to the plane of FIG. 1 and the left-right direction in FIGS. It has a long box shape.

A keyboard table 2 protrudes forward from a front surface of the main body 1 (on the front side in FIG. 1, on the left side in FIGS. 2 to 4) at a substantially intermediate height position. A keyboard 3 is formed on the keyboard table 2. That is, a keyboard chassis 4 is fixed on the keyboard table 2, and a large number of white keys 5 and black keys 6 are arranged on the keyboard chassis 4 in parallel in the left-right direction.

Reference numeral 7 denotes an operation panel, on which various switches such as a tone quality adjustment switch (dial) unique to the electronic musical instrument are provided. The operation panel 7 has a keyboard 3, that is, a key 5,
It is located directly above the rear end of the key 6 and also serves as a decorative plate that covers the rear end of the keys 5 and 6. The rear end portion of the operation panel 7 is an upwardly extending portion 7a bent upward, and the upwardly extending portion 7a also serves as a part of the front plate of the main body 1.

Reference numeral 8 denotes a top plate of the main body 1, and an upper front plate 9 extends downward from a lower surface of a front end portion of the top plate 8. The position in the front-rear direction of the upper front plate 9 substantially matches the position in the front-rear direction of the upwardly extending portion 7a of the operation panel 7. The lower end of the upper front plate 9 is connected to the upper extending portion 7a of the operation panel 7.
The gap between the upper front plate 9 and the upper extending portion 7a is a passage gap 10 through which a keyboard cover described later passes.

Reference numeral 11 denotes a keyboard cover for opening and closing the keyboard 3. That is, the keyboard cover 11 passes through the passage gap 10, and when the keyboard cover 11 is located at the frontmost position as shown in FIG.
6) It is in a completely closed position covering the whole, and
When the key 1 is located at the rearmost position as shown in FIG. 4, that is, when the key 1 is stored in the main body 1 over substantially the entire length in the front-rear direction, the keyboard 3 and the operation panel 7 are completely opened. Become.

The intermediate open position slightly displaced in the closing direction from the fully open position shown in FIG. 4 is in the state shown in FIG. At the intermediate open position shown in FIG.
Almost the entire operation panel 7 is covered.
It is assumed that there is no support for the operation of No. 6.

The front edge of the keyboard cover 11 is fixed to (the body of) the keyboard cover 11 over the entire length in the left-right direction.
2 substantially. This leading edge member 12
The mounting portion 12a is fixed to the lower surface of the front end portion of the keyboard lid 11 with a screw, an adhesive, or the like, the front edge component portion 12b is located at the front end of the keyboard lid 11, and the rear edge portion is slightly behind the front edge of the front edge component portion 12a. And a downwardly extending portion 12c extending downward.

When the keyboard cover 11 is in the completely closed position, the downwardly extending portion 12c covers the front surface of the keyboard 3 (keys 5, 6). An elastic member 13 such as rubber is fixed to the distal end of the downwardly extending portion 12c. When the elastic member 13 is in the fully closed position, the elastic member 13 contacts the upper surface of the front end of the keyboard table 3. The leading edge member 12 is formed by, for example, bending a metal plate or by using a synthetic resin.

A guide mechanism 21 is provided on the main body 1 for opening and closing the keyboard cover 11. This guide mechanism 21
Racks (rack bars) 22 are fixed to the inner surfaces of the left and right side walls 1a of the main body 1, respectively. The rack 22 extends over substantially the entire length of the main body 1 in the front-rear direction, and its tooth surface 22a faces upward. On the other hand, on the lower surface of the rear end of the keyboard cover 11, a pinion 24 is held via a bracket 23 so as to be rotatable around an axis extending in a substantially horizontal direction. The pinion 24 is always meshed with the rack 22. The front end and the rear end of the rack 22 have a pinion 2
A stopper is formed which abuts on the rotation shaft 24a of the fourth and restricts further forward or backward movement.

With such a guide mechanism 21, the keyboard cover 11 can swing about the rotation shaft 24a of the pinion 24, and can be displaced in the front-rear direction while rotating with the pinion 24 meshing with the rack 22. Is done. In other words, the keyboard cover 11 is displaced in the front-back direction with its front end raised to an appropriate height during the opening / closing operation.
By swinging about the center 4a, the front end of the keyboard lid 11 can be set to an appropriate height.

On the inner surface of the left and right side walls 2a of the keyboard table 2,
Each of the beat trees 31 is fixed. This beat tree 31
Extends in the front-rear direction over substantially the entire length of the left and right side walls 2a,
The upper surface 31a is near the front end of the operation panel 7,
It has a concave portion 32 as a locking portion. The recess 32 has an extremely short bottom 32a in the front-rear direction, and is gradually and smoothly raised from the bottom 32a toward the front, and gradually and smoothly raised from the bottom 32a toward the rear. .

When the upper surface 31a of the clapper 31 is viewed as a whole, it is located higher than the keys 5 and 6. The lower end (the elastic member 13) of the front edge member 12c of the keyboard lid 11 is supported on the upper surface 31a, and even when the keyboard lid 11 is separated from the keyboard lid 11 at the time of opening / closing operation, the keyboard lid 11 (the front end portion) has the key 5, 6 is not abutted. The upper surface 31a gradually and smoothly rises from the front end toward the rear,
It is gradually and smoothly lowered toward the bottom 32a. Then, from the bottom portion 32a, the height is gradually and smoothly increased as described above toward the rear, and then gradually and smoothly lowered toward the rear end.

When the cover 11 is in the completely closed position, the lower cover 11 is entirely covered by the cover 11 with the lower extension 12c of the cover 11 positioned immediately before the clasp 31. ing. That is, the front surface of the clap 31 is covered by the lower extending portion 12 c of the keyboard cover 11.

At the above-described intermediate open position in FIG. 3, the lower extending portion 12c of the keyboard cover 11 (the elastic member 13 attached to the lower portion 12c)
Is fitted and locked in the concave portion 32 (bottom portion 32a), and the keyboard cover 11 is stably held at the intermediate open position.
That is, (the bottom 32a of) the concave portion 32 constitutes a stabilizing means. In addition, the vicinity of the bottom part 32a is the bottom part 32a.
, The sliding guide of the gradually smooth height change portion even if the lower cover 11 is lowered at a position where the downwardly extending portion 12c is slightly away from the bottom portion 32a. The lower extension portion 12c can be reliably positioned on the bottom portion 32a by using the above, and the intermediate opening position can be easily and reliably set. The length of the bottom portion 32a in the front-rear direction is slightly larger than the width in the front-rear direction of (the elastic member 13 attached to the lower end of) the downwardly extending portion 12c.

In the main body 1, a large main speaker 41 is disposed below the keyboard table 2 (two in the embodiment, left and right). The vibration surface 41a of the main speaker 41 is exposed to the outside from the front surface of the lower front plate 42 toward the front as shown in FIG.

In the main body 1, a position higher than the keyboard table 2, more specifically, above the keyboard cover 11 in the fully open position, below the top plate 8, and above the front. Behind the plate 9, a sub-speaker 43 is provided. The sub-speaker 43 is fixed to the inner surface of the left and right side walls 1a of the main body 1 via a bracket 44, and a pair of left and right
Are provided. The vibration surface 43 of the sub speaker 43 (
In a), the sound is arranged so as to face downward and forward so that the radiated sound is directed to the vicinity of the above-described passage gap 10 as much as possible. More specifically, when the keyboard cover 11 is at the fully open position shown in FIG. 4, the sound radiated from the sub-speaker 43 is reflected by the upper surface of the front end portion of the keyboard cover 11, and Upper gap 10 between front plate 9 and keyboard cover 11
a is directed forward.

The center of the sub-speaker 43 (the radiating sound surface thereof) is so arranged that the sound emitted from the sub-speaker 43 is sufficiently directed to the upper gap 10a passing through the reflection on the upper surface of the keyboard cover 11. 43a) is preferably set so as to be located behind the middle position of the main body 1 in the front-rear direction. In other words, if the position of the sub speaker 43 is too far ahead, even if the inclination angle of the sub speaker 43 is changed or adjusted,
The radiated sound reflected on the upper surface of the keyboard cover 11 will be directed too upward, and the level of the radiated sound passing through the upper gap 10a will be low.

FIG. 3 shows the manner in which the sound emitted from the sub-speaker 43 is transmitted when the keyboard cover 11 is at the intermediate open position. As is apparent from FIG. 3, at the intermediate open position, the manner in which the radiated sound from the sub-speaker 43 passes through the upper gap 10a is considerably different from the fully open position.
The sound emitted from the sub-speaker 43 is effectively removed from the upper gap 10.
a can be passed.

The difference in the characteristics of the radiated sound passing through the upper gap 10a depending on the position of the keyboard cover 11 is firstly the difference in the inclination angle of the keyboard cover 11, and secondly, the difference in the inclination angle of the upper surface of the keyboard cover 11. Thirdly, there is a difference in a vertical dimension of the upper gap 10a. That is, the keyboard cover 1
Reference numeral 1 denotes a state of slightly lowering in the fully open position, while a state of slightly lowering in the intermediate open position. Also,
The reflection of the radiated sound on the upper surface of the keyboard cover 11 can be used only in a relatively narrow range behind the upper gap 10a in the fully open position, but in the middle open position, the keyboard cover 11 located forward of the upper gap 10a can be used. The upper surface can also be used as a reflection surface. Furthermore, the vertical dimension of the upper gap 10a at the intermediate open position is larger than that at the fully open position. As described above, by adjusting the difference in sound quality between the middle open position and the fully open position, an effect like a large roof of a grand piano can be obtained.

It should be noted that whether to set the fully open position or the intermediate open position is an option of the player. Also, the upper front plate 9
Does not require a separate radiated sound passage function,
There are no slits or meshes for passing the radiated sound. Further, the speaker 43 is assembled into the main body 1 before the top plate 8 is attached. However, when the top plate 8 is assembled thereafter, the vibration surface 43a may be damaged because the speaker 43 faces downward. It will be difficult.

Although the embodiment has been described above, the present invention is not limited to this, and includes, for example, the following case. The number of the sub-speakers 43 and the selection of the arrangement positions before and after the left, right, front and rear are arbitrary. It can also be made into individual pieces. When the speaker 43 is to be mounted at the left and right intermediate position, the speaker 43 may be fixed to the lower surface of the top plate 8 via a bracket or the like.

The speaker 43 can be appropriately selected for exclusive use in the middle and high frequency ranges, exclusively for the high frequency range, and for the entire frequency range. In particular, when the speaker 43 is used for the whole range,
The main speaker 41 may not be provided.

The intermediate opening position can take not only one position but also two or more positions in the range between FIG. 3 and FIG. It is also possible to take any intermediate open position by a continuously variable type.

The object of the present invention is not limited to what is explicitly specified, but also implicitly includes providing what substantially corresponds to the contents described as preferable or advantageous.

[0050]

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and is a partial cross-sectional front view.

FIG. 2 is a cross-sectional view taken along the line XX of FIG. 1, showing a state in which a keyboard cover is in a completely closed position.

FIG. 3 shows a state in which the keyboard cover is in an intermediate open position,
The figure corresponding to FIG.

FIG. 4 shows a state in which the keyboard cover is in a fully open position,
The figure corresponding to FIG.

FIG. 5 is a main part view corresponding to FIG. 2 showing an example of mounting a conventional sub-speaker.

FIG. 6 is a main part view corresponding to FIG. 2 showing an example of mounting a conventional sub-speaker.

FIG. 7 is a main part view corresponding to FIG. 2 showing an example of mounting a conventional sub-speaker.

FIG. 8 is a main part view corresponding to FIG. 2 showing an example of mounting a conventional sub-speaker.

[Description of sign]

 1: Main body 1a: Side wall 2: Keyboard table 2a: Side wall 3: Keyboard 5: White key 6: Black key 7: Operation panel 8: Top plate 9: Upper front plate 10: Passage gap 10a: Upper gap 11: Keyboard cover 12: Front edge member 12c: Lower extension 22: Rack 24: Pinion 31: Beater 31a: Upper surface 32: Recess 32a: Bottom 43: Sub speaker 43a: Vibration surface

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G10H 1/32 H04R 1/02

Claims (1)

(57) [Claims] 1. An electronic musical instrument having a passage gap through which a keyboard cover displaced toward an open position passes below an upper front plate extending downward from a front end of a top plate of the main body. A speaker mounting structure for an electronic musical instrument, wherein a speaker is provided downward between the keyboard cover at the open position and the top plate.