JPH0626386U - Electronic musical instrument having a speaker - Google Patents

Abstract

(57) [Abstract] [Purpose] In an electronic keyboard musical instrument having a speaker provided in the case, the sound quality is not deteriorated, the number of parts is small, the structure is simple and the assembly is easy, and the case is small. Upper case 1 ₁ of the structural Case 1 has a sound output hole 5,5 at the rear of the left and right, the case rear side plate in a position lower case 1 ₂ facing the sound outlet 5,5 of the bottom plate 6 A circular cylindrical body 1 that has concave portions 7 and 7 that open to
0 and a speaker mounting leg 11 are formed, and a sound output hole 9 is formed inside the cylindrical body 10 of the bottom plate 8. The speaker 3 is fixed to the leg 11 with a screw 13, and the back surface of the speaker 3 fitted into the tubular body 10 is in close contact with the upper edge of the tubular body 10 via a sealing member 12.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electronic musical instrument such as a keyboard in which a speaker is housed in a case composed of an upper case and a lower case.

[0002]

[Prior art]

 As the above-mentioned conventional electronic keyboard musical instrument, one having a structure in which a speaker is directly attached to an upper case, or one having a speaker box having a sealed structure or a bass reflex structure attached to a lower case is known.

[0003]

[Problems to be solved by the device]

 In the case where the speaker is directly attached to the upper case, the sound from the back of the speaker leaks to the performer from the keyboard housing part of the case and the fitting part of the upper case and the lower case, and the sound from the front of the speaker is heard. They interfered with each other, resulting in poor sound quality. In addition, the speaker case attached to the lower case is disadvantageous in that it is not large and compact especially with a single keyboard, and the component cost and assembly cost increase. SUMMARY OF THE INVENTION It is an object of the present invention to provide an electronic keyboard musical instrument that solves the above-mentioned drawbacks of the related art, has a small case, has a simple structure, and has improved sound quality.

[0004]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides an electronic musical instrument in which a speaker is housed in a case composed of an upper case and a lower case, and a sound output hole is provided in the upper case, and the bottom plate of the lower case is A recess is formed at a position facing the sound output hole and projects inward and is opened in the rear side plate of the case. The sound output hole is formed in the bottom plate of the recess, and the cylinder surrounding the sound output hole and the speaker are mounted. A leg is integrally provided, the speaker is housed in the cylindrical body and is attached to the speaker mounting leg, and a back surface portion of the speaker is closely attached to an upper end portion of the cylindrical body.

[0005]

[Action]

 Since the rear part of the speaker is sealed in the cylinder, the sound emitted from the rear part of the speaker does not leak from the fitting part of the upper case and the lower case and the keyboard accommodating part. Sound quality is not impaired because it does not interfere with the sound emitted from the sound output hole of the. The sound emitted from the back of the speaker is emitted to the rear of the case through the recess through the sound emission hole formed in the bottom plate of the recess of the lower case, but it may interfere with the sound from the front of the speaker toward the player. In addition, even if the volume inside the cylinder is small, the sound emitted from the back surface of the speaker is emitted from the sound output hole, so the cone paper of the speaker can freely vibrate and the sound quality is not deteriorated.

[0006]

【Example】

An embodiment of the present invention will be described below with reference to the drawings. In the drawings, 1 is a case of an electronic keyboard musical instrument, 2 is a keyboard, and 3 is a speaker. The case 1 is composed of an upper case 1 ₁ and a lower case 1 ₂ having an opening 4 exposing the keyboard 2. The upper case ₁ has a left and right in the rear two sound emission holes 5,5. Lower case 1 ₂ at a position opposed to said sound output hole 5,5 rear left and right of the bottom plate 6, recesses 7 and 7 open to projecting and rearwardly plate inward are formed. A sound emission hole 9 is formed in a bottom plate 8 of the recess 7, and a circular cylindrical body 10 and four speaker mounting legs 11 near the outer periphery thereof are integrally formed with the bottom plate 8 at the upper part of the bottom plate 8. Has been formed. The loudspeaker 3 is fitted into the tubular body 10, is placed on the upper end edge of the loudspeaker body 10 through a sealing member 12 such as felt, if necessary, and is attached to the speaker mounting leg 11 by a screw 13 at the peripheral edge portion. As a result, the rear part of the speaker 3 is hermetically sealed in the cylindrical body 10, and the sound emitted from the rear part does not leak to the inside of the case 1 but passes through the sound emission hole 9 and the recess 7 to the rear of the case 1. Is released to. Sound outlet 9 of the lower case 1 ₂ can give an optimum damper effect on the properties of the speaker 3 by setting the area to the optimum value.

[0007]

As described above, according to the present invention, the rear portion of the speaker attached to the speaker mounting leg of the lower case is housed in the lower case cylinder and closely adheres to the upper edge of the cylinder. However, since the sound emitted from the back of the speaker is emitted from the sound output hole of the lower case through the recess to the rear of the case, the sound quality of the speaker does not deteriorate and the speaker mounting Since the leg and the cylinder are formed integrally with the lower case, the number of parts is small, the structure is simple and the assembly is easy, and the case is small.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention viewed from the rear side.

FIG. 2 is a sectional view of the embodiment shown in FIG.

FIG. 3 is a perspective view of the lower case of the embodiment shown in FIG.

[Explanation of symbols]

1 Electronic Keyboard Instrument Case 1 ₁ Upper Case 1 ₂ Lower Case 2 Keyboard 3 Speaker 4 Opening 5 Sound Output Hole 6 Bottom Plate 7 Recess 8 Recess 7 Bottom Plate 9 Sound Release Hole 10 Cylindrical Body 11 Speaker Mounting Leg 12 Sealing Member 13 Screw

Claims (1)

[Scope of utility model registration request] 1. An electronic musical instrument in which a speaker is housed in a case consisting of an upper case and a lower case, wherein a sound output hole is provided in the upper case, and the bottom plate of the lower case is inwardly located at a position facing the sound output hole. A speaker and a speaker mounting leg are integrally provided with a cylindrical body surrounding the sound emitting hole and a sound emitting hole formed on the bottom plate of the recess. An electronic musical instrument having a speaker, characterized in that the speaker is housed in the tubular body and attached to the speaker mounting leg, and a back surface portion of the speaker is closely attached to an upper end portion of the tubular body.