JPH0594893U - Electronic musical instrument - Google Patents

Abstract

(57) [Abstract] [Purpose] When a packing member for sealing is arranged between the upper partition plate and the lower partition plate, the packing member for sealing should be separated from the upper partition plate and the lower partition plate. Provided is an electronic musical instrument capable of easily and promptly performing an arranging operation for arranging it between them, and having sufficient mechanical strength between the upper partition plate and the lower partition plate. The purpose is to do. A packing member for sealing is provided between an upper partition plate 8 formed on the upper case side and a lower partition plate 9 formed at a position of the lower case 2 facing the upper partition plate 8. Arrange 10
Since upper reinforcing ribs 15 and lower reinforcing ribs 16 for reinforcement are formed on both side surfaces of both the upper partition plate 8 and the lower partition plate 9, the upper reinforcing ribs 15 and the lower reinforcing ribs 16 are formed. By the positioning action, the outer periphery of the packing member 10 can be positioned, and the mechanical strengths of both the upper partition plate 8 and the lower partition plate 9 can be reinforced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to electronic musical instruments such as small electronic organs and electronic pianos.

[0002]

[Prior Art]

 Conventionally, ribs for partitioning the inside of each case are integrally formed on the upper case and the lower case constituting the main body case, and the upper case and the lower case are formed. A partition plate member that acoustically separates the upper case and the lower case is disposed between the upper case and the lower case, and the ribs and the partition plate member are attached to the upper case. There is known an electronic musical instrument having a structure in which a speaker accommodating portion for accommodating a speaker is formed.

[0003]

[Problems to be solved by the device]

 By the way, in the case of the above-mentioned conventional electronic musical instrument, a partition plate member for acoustically separating the upper case and the lower case is provided between the upper case and the lower case. Since it is possible to prevent sound leakage to the keyboard side attached to a part of the upper case and to prevent resonance of the main case due to sound leakage, the partition plate member is thus Since this is installed between the upper case and the lower case, not only the weight of the entire electronic musical instrument increases, but also a partition plate member must be separately manufactured and assembled. Therefore, the cost is increased and the assembly work is complicated. Therefore, recently, not only the weight of the entire electronic musical instrument has been reduced, but also a partition plate member has not been separately manufactured. Therefore, the cost is not increased and the assembly work is not complicated. We have proposed an electronic musical instrument that can prevent sound leakage to the keyboard attached to the keyboard and resonance of the body case due to sound leakage. The electronic musical instrument according to this proposal has a main body case formed by combining an upper case with an open lower part and a lower case with an open upper part, and one of the upper case and the upper case. And a speaker attached to a speaker mounting portion formed on a portion of the upper case other than the portion where the keyboard is attached, and a speaker attached to the keyboard. An upper partition plate integrally formed on the speaker mounting portion so as to surround a side portion of the speaker, and a side of the speaker at a position of the lower case facing the upper partition plate. A lower partition plate integrally formed so as to surround the portion, and a sealing packing member disposed between the upper partition plate and the lower partition plate. However, when disposing the sealing packing member between the upper partition plate and the lower partition plate, while positioning the sealing packing member between the upper partition plate and the lower partition plate, However, there is a problem in that the arrangement work is complicated and the mechanical strength between the upper partition plate and the lower partition plate is not yet sufficient. The present invention has been made in view of such conventional problems, and when the sealing packing member is disposed between the upper partition plate and the lower partition plate, the sealing packing member is , Which can be easily and quickly arranged between the upper partition plate and the lower partition plate, and has sufficient mechanical strength between the upper partition plate and the lower partition plate. It aims at providing the electronic musical instrument which can be.

[0004]

[Means for Solving the Problems]

 In order to solve these problems, the present invention relates to a main body case formed by combining an upper case with an open lower part and a lower case with an open upper part, and the upper case. Keyboard mounted on a part of the upper case and a speaker mounted on a speaker mounting portion formed on a part of the upper case other than the part where the keyboard is mounted. And an upper partition plate integrally formed on the speaker mounting portion so as to surround a side portion of the speaker, and the speaker at the position of the lower case facing the upper partition plate. It comprises a lower partition plate integrally formed so as to surround the side of the mosquito, and a sealing packing member arranged between the upper partition plate and the lower partition plate. The outer periphery of the packing member is positioned on both side surfaces of at least one of the upper partition plate and the lower partition plate, and the mechanical strength of at least one of the upper partition plate and the lower partition plate is reinforced. To form a reinforcing projection for

[0005]

According to the present invention, the speaker mounting portion formed on the upper case other than the keyboard mounting portion surrounds the side portion of the speaker. The partition plate is integrally formed, and at the position of the lower case facing the upper partition plate, the lower partition plate is integrally formed so as to surround the side portion of the speaker, and further, the upper partition plate is formed. Since the packing member for sealing is disposed between the plate and the lower partition plate, the inside of the speaker accommodating portion formed by the upper partition plate and the lower partition plate is formed by the packing member for sealing. Is completely sealed, and therefore, without specially placing a partition plate member that acoustically separates the upper partition plate and the lower partition plate from each other, to the keyboard side attached to a part of the upper case. Sound leakage and the resonance of the body case caused by sound leakage. It can be stopped. Also, since reinforcing protrusions are formed on both side surfaces of at least one of the upper partition plate and the lower partition plate, the outer periphery of the packing member can be positioned and the upper partition plate can be positioned. The mechanical strength of at least one of the partition plate and the lower partition plate can be reinforced.

[0006]

【Example】

 Hereinafter, the present invention will be described based on illustrated embodiments. 1 is an exploded perspective view showing an electronic musical instrument according to an embodiment of the present invention, FIG. 2 is a sectional view taken along a speaker when the electronic musical instrument shown in FIG. 1 is assembled, and FIG. 3 is a lower partition plate 9. FIG. 4 is a perspective view of an essential part showing an enlarged periphery, and FIG.

As shown in FIGS. 1 to 4, in the electronic musical instrument according to this embodiment, an upper case 1 whose lower part is open and a lower case 2 whose upper part is open are combined. A main body case 3 configured as described above, a keyboard 4 attached to a part of the upper case 1, and a keyboard attaching portion 5 of the upper case 1 to which the keyboard 4 is attached. Other than the speaker mounting portions 6 and 6 formed on the other portions, and the speaker mounting portions 6 and 6 on the speaker 7 and 7 side, respectively. The upper partition plates 8 and 8 integrally formed so as to surround the portion and the lower case 2 facing the upper partition plates 8 and 8 surround the side portions of the loudspeakers 7 and 7. Lower partition plates 9 and 9 formed integrally with the upper partition plate and the lower partition plates 9 and 9 and the upper partition plates 8 and 8 for sealing. And a bass reflex port 11, 11 attached to each of the speaker attachment portions 6, 6.

As shown in FIG. 3 and FIG. 7, the packing member 10 for sealing having a U-shaped cross section disposed between the upper partition plates 8 and 8 and the lower partition plates 9 and 9 is made of rubber material. The entire packing is formed of a ring or non-woven fabric into a ring shape, and the sealing action of the packing member 10 causes the upper partition plate 8 and the lower partition plate 9 to completely seal the interior of the speaker accommodating portion 12. I am trying to do it.

The outer peripheries of the packing members 10 are positioned on both side surfaces of the upper partition plates 8 and 8 and the lower partition plates 9 and 9, and the upper partition plates 8 and 8 and the lower partition plate 9, In order to reinforce the mechanical strength of both 9, the upper reinforcing ribs 15 and the lower reinforcing ribs 16 which are a plurality of reinforcing protrusions are integrally formed at predetermined intervals. Of the upper reinforcing ribs 15 and the lower reinforcing ribs 16, one end (lower end) of the upper reinforcing rib 15 formed on the upper partition plate 8 side projects more than one end (lower end) of the upper partition plate 8. The positioning portion 15a is formed. On the other hand, conversely, a position fixing portion that protrudes only to a position lower than one end (upper end) of the lower partition plate 9 at one end (upper end) of the lower reinforcing rib 16 formed on the lower partition plate 9 side. 16a is formed. With the upper reinforcing ribs 15 and the lower reinforcing ribs 16 formed in this way, the packing member 10 arranged between the upper partition plate 8 and the lower partition plate 9 is sandwiched from the vertical direction. It has become. Further, on the inner surface of the lower case 2, a large number of reinforcing ribs 13 for increasing the mechanical strength of the entire lower case 2 are integrally formed in a lattice shape.

The upper case 1 and the lower case 2 are made of a plastic material, and the upper fitting portion 1 a is formed on the outer peripheral edge of the upper case 1 and the lower case 2. , The lower fitting portion 2a is formed. A packing member 10A similar to the packing member 10 is disposed between the upper fitting portion 1a and the lower fitting portion 2a, and the upper fitting portion is sealed by the packing member 10A. The inside of the upper cases 1 and 2 is completely sealed by 1a and the lower fitting portion 2a. In addition, the bass reflex ports 11 and 11 are open at one end into a speaker accommodating portion 12 formed by the upper partition plates 8 and 8 and the lower partition plates 9 and 9, and the other end is the upper part. It is open to the outside of Case 1.

Of the upper case 1 and the lower case 2, on the front side of the upper case 1, the keyboard mounting portion 5 is provided over the entire area in the left-right direction, and on the rear surface thereof. Is an operation panel section 1a equipped with various operation switches, and further, on the left and right sides on the rear side, a bass reflex port attaching section 1c for attaching the above-mentioned speakers 7, 7 and the bass reflex port 11 to each other. Are formed respectively. A sound hole net body 14 in which a net-like net is stretched is fixed to the upper portions of the speaker mounting portions 6 and 6 and the bass reflex porter mounting portion 1c.

Next, a procedure for assembling the above-described upper case 1, lower case 2, keyboard 4, speaker 7 and the like will be described. First, the speakers 7 and 7 are attached to the insides of the speaker attachment portions 6 and 6 of the upper case 1 by screwing, respectively, and the keyboard is formed in front of the upper case 1. With the base ends of the keyboard 4 and the keyboard chassis 40 inserted inside the portion 5, the base ends of the keyboard 4 and the keyboard chassis 40 are screwed with screws 41, 41.

Next, the packing members 10 and 10 for sealing are arranged between the upper partition plates 8 and 8 and the lower partition plates 9 and 9. First, as shown in FIG. Then, the band-shaped packing member 10 is attached to the upper side of one side of the lower partition plate 9 formed on the lower case 2 side, and the lower half of the packing member 10 is pasted to the center of the packing member 10. Bend from the part. Then, as shown in FIG. 6, the packing member 10 is covered on the entire upper portion of the lower partition plate 9. Thereafter, as shown in FIG. 7, the lower end of the upper partition plate 8 formed on the upper case 1 side is placed. Then, since a plurality of positioning portions 15a are formed at predetermined intervals on both side surfaces of the upper partition plate 8, as shown in the figure, the packing portions are formed by the inner portions of the respective positioning portions 15a. The upper outer peripheral surface of the member 10 is pressed. Therefore, the packing member 10 can be firmly sandwiched between the upper partition plate 8 and the lower partition plate 9 by the positioning action of each positioning portion 15a without using a special positioning means.

Similarly, an upper fitting portion 1a and a lower fitting portion 2a are formed on the outer peripheral portions of the upper case 1 and the lower case 2 described above, as shown in FIG. Therefore, as in the case described above, the lower half of the packing member 10A is pasted on the outer side surface upper part of the upper fitting portion 1a formed on the lower case 2 side with the band-shaped packing member 10A. Then, the packing member 10A is bent inward from the center thereof. Then, as shown in FIG. 9, the packing member 10A covers the entire upper portion of the lower fitting portion 2a.

After that, as shown in FIG. 10, the upper fitting portion 1a formed on the upper case 1 side is placed. Then, since the positioning portion 15a is formed on the outer surface of the upper fitting portion 1a, as shown in FIG. 10, the inner portion of the positioning portion 15a causes the upper portion and the outer peripheral surface of the packing member 10A to contact with each other. Will be held at the same time. Therefore, without using any special positioning means, the holding action between the upper fitting portions 1a and the lower fitting portions 2a allows the 1100 to be firmly fixed between the upper fitting portions 1a and the lower fitting portions 2a. Can be sandwiched between.

After the upper case 1 is placed on the lower case 2 in this manner, the upper case 1 and the lower case 2 are integrated by using a screw (not shown). To do. Then, due to the sealing action of each packing member 10, each of the upper partition plates 8 and 9 and each of the lower partition plates 9 and 9 form each of the speaker storage portions 12 and 12 in a completely sealed state. At the same time, the respective loudspeakers 7, 7 attached to the loudspeakers 7, 7 of the upper case 1 are accommodated inside the loudspeaker accommodating portions 12, 12. ..

According to the electronic musical instrument assembled in this way, the packing member 10 closes the upper case 1 so that the upper case 1 and the lower case 2 are integrally formed. Since the interior of each of the loudspeaker accommodating portions 12, 12 is completely sealed by the respective lower partition plates 9, 9, the respective loudspeakers accommodated in the respective loudspeaker accommodating portions 12, 12 are sealed. The sound generated from the rear of 7, 7 does not leak to the keyboard 4 side.

A large number of reinforcing ribs 13 are integrally formed on the inner surface of the lower case 2 in a grid pattern. Similarly, the upper partition plates 8 and 8 and the lower partition plate 9 are similarly formed. Since a large number of upper reinforcing ribs 15 and 15 are integrally formed on the side wall surfaces of the lower casings 9 at predetermined intervals in the height direction, the overall mechanical strength of the lower case 2 and the upper partition plates. It is possible to increase the mechanical strength of the whole of 8, 8 and the lower partition plates 9, 9. Therefore, it is possible to prevent the upper case 1 and the lower case 2 from resonating due to the sound pressure of the sounds generated from the respective speakers 7.

Further, each of the loudspeaker mounting portions 6 and 6 has an opening inside a loudspeaker accommodating portion 12 whose one end is formed by the upper partition plates 8 and 8 and the lower partition plates 9 and 9. However, since the bass reflex ports 11 and 11 having the other ends open to the outside of the upper case 1 are attached, the sounds generated from the rear portions of the respective loudspeakers 7 and 7 are transmitted to this bass reflex port. The sound of a frequency lower than the resonance frequency f in 11, 11 is phase-inverted in the bass reflex port 11, 11, and becomes in phase with the sound emitted from the surface side of each speaker 7, 7. Since the sound is emitted from the speakers 7, 7, the bass feeling can be increased. On the other hand, the sound having a frequency higher than the resonance frequency f is not inverted in phase in the bass reflex ports 11 and 11, and is thus emitted from the speakers 7 and 7 in the opposite phase. It will be canceled by the sound emitted from the front side of the mosquitoes 7.

In this embodiment, in addition to the shapes of the upper fitting portion 1a and the lower fitting portion 2a in the above-described embodiment, as shown in FIGS. 11 and 12, the upper fitting portion 1a and the lower fitting portion are The upper protrusion 1a and the lower protrusion 2b may be formed on both of the portions 2a. When formed in this way, there is no gap between the upper fitting portion 1a and the lower fitting portion 2a, so it is possible to prevent the occurrence of so-called flicker sounds when musical tones are generated. In addition to the above, since the upper protrusion 1a and the lower protrusion 2b are formed on both sides of the upper fitting portion 1a and the lower fitting portion 2a, the positioning action of the upper protrusion 1a and the lower protrusion 2b causes The packing member 10 arranged between the upper fitting portion 1a and the lower fitting portion 2a can be firmly fixed. The shapes of the upper reinforcing ribs 15 and the lower reinforcing ribs 16 formed on the upper partition plates 8 and 8 and the lower partition plates 9 and 9 are not limited to those of this embodiment.

[0021]

[Effect of the device]

 As is clear from the above description, according to the present invention, the upper partition plate is integrally formed on the upper case side, and the lower partition plate is provided at the position of the lower case facing the upper partition plate. A sealing packing member is disposed between the upper partition plate and the lower partition plate, and a reinforcing protrusion is provided on at least one side surface of at least one of the upper partition plate and the lower partition plate. Since it is formed, the reinforcing projection allows the outer periphery of the packing member to be positioned. Therefore, the packing member for sealing is arranged between the upper partition plate and the lower partition plate. In this case, the work of disposing the sealing packing member between the upper partition plate and the lower partition plate can be performed easily and quickly, and the upper partition plate and the lower partition plate can be easily installed. Can have sufficient mechanical strength with

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an electronic musical instrument according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along a speaker when the electronic musical instrument shown in FIG. 1 is assembled.

FIG. 3 is a perspective view of an essential part showing an enlarged periphery of a lower partition plate 9.

FIG. 4 is a perspective view of relevant parts showing a state in which a packing member 10 is arranged on an upper part of a lower partition plate 9.

FIG. 5 is a cross-sectional view of essential parts showing a state in which the packing member 10 is bent at the upper part of the lower partition plate 9.

FIG. 6 is a packing member 1 arranged on an upper part of a lower partition plate 9.
It is a principal part sectional view which shows the state before putting the upper partition plate 8 on 0.

FIG. 7 is a packing member 1 arranged on an upper part of a lower partition plate 9.
It is a principal part sectional view which shows the state after putting the upper partition plate 8 on 0.

FIG. 8 is a cross-sectional view of relevant parts showing a state in which the packing member 10A is bent at the upper portion of the lower fitting portion 2a.

FIG. 9 is a cross-sectional view of essential parts showing a state before the upper fitting portion 1a is placed on the packing member 10A arranged above the lower fitting portion 2a.

FIG. 10 is a cross-sectional view of essential parts showing a state after the upper fitting portion 1a is placed on the packing member 10A arranged above the lower fitting portion 2a.

FIG. 11 is an enlarged cross-sectional view of a lower fitting part 2a and another embodiment of the lower fitting part 2a.

12 is a cross-sectional view showing a state in which the lower fitting portion 2a and the lower fitting portion 2a shown in FIG. 11 are combined.

[Explanation of symbols]

 1 Upper case 2 Lower case 3 Main body case 4 Keyboard 5 Keyboard mounting part 6 Speaker mounting part 7 Speaker 8 Upper partition plate 9 Lower partition plate 10, 10A Packing member 15 Upper reinforcing rib 16 Lower part Reinforcing rib

Claims (1)

[Scope of utility model registration request] 1. A main body case constituted by combining an upper case having an open lower portion and a lower case having an open upper portion, and attached to a part of the upper case. And a speaker attached to a speaker attachment portion formed on a portion of the upper case other than the portion to which the keyboard is attached, and the speaker attachment portion. And an upper partition plate integrally formed so as to surround the side portion of the speaker, and an integrally formed so as to surround the side portion of the speaker at a position of the lower case facing the upper partition plate. A formed lower partition plate and a sealing packing member arranged between the upper partition plate and the lower partition plate, wherein both side surfaces of at least one of the upper partition plate and the lower partition plate In addition to positioning the outer periphery of the packing member,
An electronic musical instrument characterized in that a plurality of protrusions for reinforcement are formed at predetermined intervals to reinforce the mechanical strength of at least one of the upper partition plate and the lower partition plate.