JP2012217080A - Loudspeaker mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a loudspeaker mounting structure capable of sufficiently securing a sound effect by securing strength of an apparatus body at a portion, at which plural loudspeakers adjacent to each other are mounted.SOLUTION: The mounting structure comprises a reinforcement plate 14 for reinforcing an upper case 2 of an apparatus body 1 at a portion, at which plural loudspeakers 8a-8c are mounted. The reinforcement plate 14 is provided with: plural speaker insertion holes 16a-16c, in which the plural loudspeakers 8a-8c are inserted; and a reinforcement part 18 positioned between the plural speaker insertion holes 16a-16c and reinforcing the reinforcement plate 14. Accordingly, even when the reinforcement plate 14 is provided with the plural speaker insertion holes 16a-16c, in which the plural loudspeakers 8a-8c are inserted, strength of the reinforcement plate 14 can be secured by the reinforcement part 18. Also, the strength of the upper case 2 at a portion, at which the plural loudspeakers 8a-8c are mounted, can be sufficiently secured by the reinforcement plate 14, to reliably prevent vibrations of the upper case 2 during sound production from the plural loudspeakers.

Description

  The present invention relates to a speaker mounting structure used in an electronic device such as an electronic musical instrument or an acoustic device.

  For example, in a speaker mounting structure in an audio device, as described in Patent Document 1, the device main body is composed of a first case on the front surface side and a second case on the rear surface side. A reinforcing plate is fixed between the two cases, a speaker is mounted on a speaker mounting portion provided on the reinforcing plate, and an edge on the baffle surface side of the speaker is between the reinforcing plate and the first case on the front side. There is known a structure configured to secure the sound effect by securing the strength of the device main body at the location where the speaker is attached by being sandwiched between the two.

Japanese Patent Application Laid-Open No. 07-7781

  However, in such a speaker mounting structure, when a plurality of speakers are mounted adjacent to each other in the device body, if the plurality of speaker mounting portions are provided adjacent to the reinforcing plate, the strength of the reinforcing plate is reduced. As a result, the strength of the device main body at the location where the speaker is attached also decreases. For this reason, when a plurality of speakers are sounded at the same time, the apparatus main body vibrates due to the vibrations of the plurality of speakers, and a sufficient acoustic effect cannot be obtained.

  The problem to be solved by the present invention is to provide a speaker mounting structure capable of ensuring the strength of the device main body at a location where a plurality of speakers adjacent to each other are mounted and sufficiently ensuring the acoustic effect. .

  The present invention provides a device main body, a plurality of speakers attached to the device main body adjacent to each other, and a reinforcement for reinforcing the device main body at a location where the plurality of speakers are attached to the device main body. The reinforcing plate is provided with a plurality of speaker insertion holes into which the plurality of speakers are respectively inserted, and the reinforcing plate is located at least between the plurality of speaker insertion holes. The speaker mounting structure further includes a reinforcing portion for reinforcing the reinforcing plate.

  According to the present invention, when the plurality of speakers are assembled to the apparatus main body adjacent to each other, even if the plurality of speaker insertion holes into which the plurality of speakers are inserted are provided in the reinforcing plate, the strength of the reinforcing plate is sufficiently increased by the reinforcing portion. It is possible to ensure sufficient strength of the device main body at a location where a plurality of speakers are attached. For this reason, since a plurality of speakers adjacent to each other can be securely and firmly assembled to the device body, it is possible to reliably prevent the device body from vibrating when sounding from the plurality of speakers. Can be secured sufficiently.

It is the front view which showed Embodiment 1 which applied this invention to the electronic keyboard musical instrument. It is an expanded sectional view in the AA arrow of the electronic keyboard musical instrument shown by FIG. It is an expanded sectional view in the BB arrow of the electronic keyboard musical instrument shown by FIG. It is an expanded sectional view in CC arrow of the electronic keyboard musical instrument shown by FIG. FIG. 2 is a back view showing an inner surface of an upper case in the electronic keyboard instrument shown in FIG. 1. It is an expanded sectional view in the DD arrow of the upper case shown by FIG. It is sectional drawing of the principal part which expanded and showed the A section in the attaching part of the speaker of the upper case shown by FIG. FIG. 7 is an enlarged perspective view showing a reinforcing plate shown in FIG. 6. It is the expansion perspective view which showed the modification of the reinforcement board shown by FIG. In Embodiment 2 which applied this invention to the electronic keyboard musical instrument, it is the reverse view which showed the inner surface of the upper case. It is sectional drawing in the EE arrow of the upper case shown by FIG. It is the side view which decomposed | disassembled and showed the two reinforcement members shown by FIG.

(Embodiment 1)
A first embodiment in which the present invention is applied to an electronic keyboard instrument will be described below with reference to FIGS.
As shown in FIGS. 1 and 2, the electronic keyboard instrument includes a musical instrument main body 1. The instrument main body 1 includes an upper case 2 and a lower case 3. In this case, the lower case 3 is composed of a synthetic resin keyboard chassis 4 which also serves as a front lower case and a synthetic resin rear lower case 5.

  As shown in FIGS. 1 and 2, a keyboard portion 6 is incorporated in the instrument body 1. The keyboard unit 6 has a configuration in which a plurality of keys 7 are provided on a keyboard chassis 4 so as to be rotatable in the vertical direction in a state of being arranged in parallel. In this case, the plurality of keys 7 include a plurality of white keys 7a and a plurality of black keys 7b.

  The upper case 2 of the musical instrument main body 1 is made of synthetic resin, and as shown in FIGS. 1 and 2, the rear lower case 5 in the lower case 3 from above the rear end (right end in FIG. 1) of the keyboard portion 6. It is arranged over the rear end (left end in FIG. 1) and also on both sides of the keyboard chassis 4 located on both sides of the keyboard 6 in the key arrangement direction (left and right in FIG. 1). It is configured as follows. Thus, the keyboard unit 6 is configured to be incorporated into the musical instrument main body 1 with the plurality of keys 7 exposed above the musical instrument main body 1.

  Further, as shown in FIGS. 1 and 5, speaker portions 8 are provided on both sides of the upper case 2, respectively. The speaker unit 8 includes a plurality of speakers 8a to 8c. The plurality of speakers 8a to 8c are a main speaker 8a and two sub-speakers 8b and 8c such as a tweeter. In this case, the main speaker 8a is formed about twice as large as one sub-speaker 8b, and this one sub-speaker 8b is formed about twice as large as the other sub-speaker 8c. Has been.

  Moreover, as shown in FIG. 1, the display part 10 and the some switch part 11 are provided in the location located between the speaker parts 8 of the both sides in the upper case 2. As shown in FIG. The display unit 10 includes a flat display panel 10 a such as a liquid crystal display panel or an EL (electroluminescence) display panel, and is configured to display information such as musical tone information electro-optically.

  In this case, as shown in FIGS. 1 and 5, the display panel 10a of the display unit 10 is electrically connected to the display substrate 10b provided on the inner surface (the surface in FIG. 5) of the upper case 2, The upper case 2 is exposed and arranged. As shown in FIG. 1, the plurality of switch portions 11 include various switches necessary for an instrument such as a power switch, a volume switch, and a tone color selection switch, and are provided on the inner surface of the upper case 2 as shown in FIG. 5. In addition, it is configured to protrude from the upper surface of the upper case 2 while being electrically connected to the plurality of switch boards 11a to 11c.

  By the way, among the plurality of speakers 8a to 8c in the speaker units 8 on both sides, the main speaker 8a and one sub-speaker 8b are respectively a mortar-shaped baffle unit 9a and this baffle, as shown in FIGS. And a magnet portion 9b provided at the lower portion of the portion 9a. The magnet portion 9b is attached to the upper case 2 of the musical instrument main body 1 via a speaker net 9d. Further, as shown in FIG. 4, the other sub-speaker 8c includes a cylindrical cone portion 9c, and is attached to the upper case 2 of the musical instrument main body 1 via a speaker net 9d.

  In this case, as shown in FIGS. 2 to 4, the upper case 2 is provided with a plurality of speaker mounting holes 12 a to 12 c into which the plurality of speakers 8 a to 8 c are inserted from above. The plurality of speaker mounting holes 12a to 12c are a large-diameter hole portion (see FIG. 2) to which the main speaker 8a is attached, a medium-diameter hole portion to which one sub speaker 8b is attached (see FIG. 3), and another one. It is formed in a smaller small-diameter hole (see FIG. 4) to which the two sub-speakers 8c are attached.

  As shown in FIGS. 2 to 4, baffle portions 9 a and cone portions 9 c on the upper surface side of the speakers 8 a to 8 c are arranged on the peripheral portions of the plurality of speaker mounting holes 12 a to 12 c, respectively. Each step recess 12d is provided. Thereby, as shown in FIGS. 2 to 4, the speakers 8 a to 8 c are inserted into the speaker mounting holes 12 a to 12 c of the upper case 2 from above the upper case 2, and the baffle portions 9 a and the cone portions of the speakers 8 a to 8 c. Each peripheral portion on the upper surface side in 9c is configured to be disposed in each stepped recess 12d in the peripheral portion of the speaker mounting holes 12a to 12c.

  Further, as shown in FIGS. 2 to 4 and 6, the speakers 8 a to 8 c are arranged so that the peripheral portions on the upper surface side of the baffle portion 9 a and the cone portion 9 c of the speakers 8 a to 8 c are the speaker mounting holes 12 a to 12 c. Each baffle portion 9a of the speakers 8a to 8c and each of the peripheral portions on the upper surface side of the cone portion 9c are respectively arranged in the step recesses 12d of the speaker mounting holes 12a to 12c in a state of being arranged in the respective step recesses 12d of the peripheral portion. It is configured to be attached together with the speaker net 9d by screws.

  In this case, the upper case 2 is made of synthetic resin, and the inner surface (lower surface in FIG. 4) of the upper case 2 in the vicinity of the peripheral edge portions of the speaker mounting holes 12a to 12c is as shown in FIGS. A plurality of mounting bosses 13 are provided. As shown in FIG. 6, the plurality of mounting bosses 13 are formed such that the height in the vertical direction is shorter than the height of the plurality of speakers 8a to 8c. For example, among the plurality of speakers 8a to 8c, the plurality of mounting bosses 13 are formed to be approximately half the height of the main speaker 8a and slightly shorter than the height of one sub speaker 8b.

  Further, as shown in FIGS. 2 to 7, a reinforcing plate 14 is attached to the plurality of mounting bosses 13 with screws 15. The reinforcing plate 14 is used to reinforce the upper case 2 of the musical instrument main body 1 where the plurality of speakers 8a to 8c of the speaker unit 8 are attached, and is formed in a substantially flat plate shape as shown in FIG. ing.

This reinforcing plate 14 is a kind of a molded plate made of wood fiber, and is a medium density with high strength obtained by adding a synthetic resin serving as an adhesive to a steamed and defibrated wood chip, and then hot pressing into a plate shape. Fiberboard (MDF: medium density
In order to reinforce the upper case 2 where the plurality of speakers 8a to 8c are attached, it is attached to the upper case 2 in a state of approaching the inner surface of the upper case 2 as shown in FIG. Yes.

  Further, as shown in FIG. 8, the reinforcing plate 14 includes a plurality of speakers 8 a to 8 c that are partly positioned on the magnet portion 9 b side and the cone portion 9 c on the lower side. Speaker insertion holes 16a to 16c are provided adjacent to each other. In this case, as shown in FIG. 8, the plurality of speaker insertion holes 16a to 16c are a large-diameter hole part into which a part of the main speaker 8a is inserted and a medium-diameter hole part into which a part of one sub-speaker 8b is inserted. And a small-diameter hole into which a part of the other sub-speaker 8c is inserted, and each of these holes is slightly smaller than each of the holes corresponding to the speaker mounting holes 12a to 12c of the upper case 2. Is formed.

  Further, as shown in FIG. 8, a plurality of mounting holes 17 are provided in the peripheral portion of the reinforcing plate 14 so as to correspond to the mounting bosses 13 of the upper case 2. Thereby, as shown in FIGS. 2 to 7, the reinforcing plate 14 causes the plurality of speaker insertion holes 16 a to 16 c to correspond to the plurality of speaker mounting holes 12 a to 12 c of the upper case 2, respectively, and the plurality of mounting holes 17. Corresponding to each mounting boss 13 of the upper case 2, and in this state, screws 15 are inserted into the plurality of mounting holes 17 from below and screwed to the mounting bosses 13. 6 is configured to be attached to the upper case 2 in a state of approaching the lower surface.

  The reinforcing plate 14 is provided with a reinforcing portion 18 as shown in FIG. The reinforcing portion 18 is formed by a plurality of ribs 18 a provided in a lattice shape along the vertical and horizontal directions (left and right directions and front and rear directions in FIG. 8) over almost the entire upper surface of the reinforcing plate 14. As shown in FIGS. 6 and 7, the plurality of ribs 18 a are formed so as to have substantially the same height as the mounting boss 13 provided on the inner surface of the upper case 2, and the upper surface of the reinforcing plate 14 and the upper case It is comprised so that it may arrange | position between 2 inner surfaces (lower surface in FIG. 6).

  Thereby, as shown in FIGS. 6 and 7, the reinforcing plate 14 is attached to the plurality of mounting bosses 13 provided on the inner surface of the upper case 2 with the plurality of speakers 8 a to 8 c being attached to the upper case 2. When attached with the screws 15, the upper end surfaces of the plurality of ribs 18a of the reinforcing portion 18 abut against the inner surface (the lower surface in FIG. 6) of the upper case 2 and approach the inner surface of the upper case 2 in this state. Are configured to be attached.

Next, a case where a plurality of speakers 8a to 8c are assembled to such an electronic keyboard instrument will be described.
In this case, first, the reinforcing plate 14 is attached to the upper case 2 of the musical instrument main body 1. At this time, the plurality of speaker insertion holes 16a to 16c correspond to the plurality of speaker mounting holes 12a to 12c of the upper case 2, respectively, and the plurality of mounting holes 17 correspond to the mounting bosses 13 of the upper case 2, respectively. In this state, the screws 15 are inserted into the plurality of mounting holes 17 from below and screwed into the mounting bosses 13, and the screwed screws 15 are tightened.

  Accordingly, the reinforcing plate 14 is attached to the plurality of mounting bosses 13 of the upper case 2 and the upper end surfaces of the plurality of ribs 18a of the reinforcing portion 18 are pressed against the inner surface of the upper case 2 in this state. And attached to the upper case 2 in a state of approaching the inner surface thereof. For this reason, even if the plurality of speaker insertion holes 16a to 16c are provided close to each other, the reinforcing plate 14 is reinforced with sufficient strength by being reinforced by the reinforcing portion 18 including the plurality of ribs 18a. Thus, the reinforced reinforcing plate 14 reinforces the strength of the portion of the upper case 2 where the plurality of speakers 8a to 8c are attached with high rigidity.

  In this state, the plurality of speakers 8a to 8c are inserted into the speaker mounting holes 12a to 12c from above the upper case 2, and the magnet 9b side and the lower side of the cone portion 9c, which are a part of the plurality of speakers 8a to 8c. Are inserted into the respective speaker insertion holes 16a to 16c of the reinforcing plate 14, and the baffles 9a and the cones 9c of the speakers 8a to 8c are connected to the peripheral portions on the upper surface side of the respective steps of the speaker mounting holes 12a to 12c. It arrange | positions to the recessed part 12d, respectively. In this state, the peripheral portions of the upper surfaces of the speakers 8a to 8c are screwed together with the speaker nets 9d to the stepped recesses 12d of the speaker mounting holes 12a to 12c.

  Thereafter, the display unit 10 and the plurality of switch units 11 are attached to the upper case 2, and the upper case 2 is attached to the lower case 3. In this case, the lower case 3 is configured in advance by connecting the rear lower case 5 to the rear part of the keyboard chassis 4 that also serves as the front lower case, and a plurality of keys 7 are arranged in parallel on the keyboard chassis 4 in this state. The keyboard portion 6 is configured by being arranged so as to be rotatable in the vertical direction. The upper case 2 is attached on the lower case 3 provided with the keyboard portion 6. Thereby, an electronic keyboard instrument is assembled.

  As described above, according to the mounting structure of the speakers 8a to 8c in the electronic keyboard instrument, the upper case 2 of the device main body 1, the plurality of speakers 8a to 8c attached to the upper case 2 and adjacent to each other, And a reinforcing plate 14 for reinforcing the upper case 2 where the plurality of speakers 8a to 8c are attached. The plurality of speakers 8a to 8c are inserted into the reinforcing plate 14, respectively. The plurality of speaker insertion holes 16a to 16c are provided, and the reinforcing plate 14 is provided with a reinforcing portion 18 for reinforcing the reinforcing plate 14 at a position located between the plurality of speaker insertion holes 16a to 16c. Therefore, the strength of the upper case 2 can be ensured at a location where a plurality of speakers 8a to 8c adjacent to each other are attached. It is possible to secure the sound effects.

  That is, in the mounting structure of the speakers 8a to 8c, when the plurality of speakers 8a to 8c are adjacent to each other and assembled to the upper case 2 of the device main body 1, the plurality of speakers 8a to 8c are inserted into the reinforcing plate 14, respectively. Even if the speaker insertion holes 16a to 16c are provided, the strength of the reinforcing plate 14 can be sufficiently secured by the reinforcing portion 18, and the reinforcing plate 14 can be used to attach the plurality of speakers 8a to 8c. The strength of the upper case 2 can be ensured.

  For this reason, since the plurality of speakers 8a to 8c adjacent to each other can be securely and firmly assembled to the upper case 2 of the device body 1, when the plurality of speakers 8a to 8c generate a sound, The vibration of the accompanying plural speakers 8a to 8c can surely prevent the upper case 2 of the device main body 1 from vibrating, thereby ensuring a sufficient acoustic effect.

  In this case, the reinforcing portion 18 is composed of a plurality of ribs 18a provided in a lattice shape along the vertical and horizontal directions on at least the upper surface of the reinforcing plate 14 that approaches the inner surface of the upper case 2 of the device main body 1. As a result, a plurality of speaker insertion holes 16a to 16c into which a part of the plurality of speakers 8a to 8c, that is, the portions on the magnet portion 9b side and the lower side of the cone portion 9c are respectively inserted, are adjacent to the reinforcing plate 14. Even if it is provided, the strength of the reinforcing plate 14 can be sufficiently increased by the plurality of lattice-shaped ribs 18a, thereby reliably preventing deformation of the reinforcing plate 14 such as warping and twisting, and the plurality of speakers 8a to 8a. It is possible to reliably prevent the upper case 2 of the device main body 1 from vibrating when sounding 8c.

  Further, the plurality of ribs 18 a are formed so that the height thereof is substantially the same as the height of the mounting boss 13 provided on the inner surface of the upper case 2. When the mounting boss 13 is mounted with screws 15, the upper end surfaces of the plurality of ribs 18a are pressed against the inner surface of the upper case 2 so that the plurality of speakers 8a to 8c can be mounted. The strength of the upper case 2 can be sufficiently secured, and the upper case 2 of the device main body 1 can be reliably and satisfactorily prevented from vibrating during the sound generation of the plurality of speakers 8a to 8c. The acoustic effect can be enhanced.

  In the above-described first embodiment, the case where the plurality of ribs 18a of the reinforcing portion 18 are formed in a lattice shape has been described. However, the present invention is not limited thereto, and for example, a polygon such as a triangle, a pentagon, a hexagon, or a circle Alternatively, a honeycomb shape formed by arranging a large number of cylindrical portions of various shapes such as an ellipse in close contact with each other may be used.

  In the above-described first embodiment, the case where the plurality of ribs 18a of the reinforcing portion 18 are provided in almost the entire area of the upper surface of the reinforcing plate 14 is described. However, it is not always necessary to provide the entire area of the upper surface. As in the modification, the configuration may be such that the reinforcing plate 14 is provided only between the plurality of speaker insertion holes 16a to 16c into which the plurality of speakers 8a to 8c are inserted.

  Furthermore, in Embodiment 1 described above, the case where the plurality of ribs 18a of the reinforcing portion 18 are provided only on the upper surface of the reinforcing plate 14 has been described. Alternatively, the reinforcing plate 14 may be provided on both upper and lower surfaces.

(Embodiment 2)
Next, a second embodiment in which the present invention is applied to an electronic keyboard instrument will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected and demonstrated to the same part as Embodiment 1 shown by FIGS.
As shown in FIGS. 10 and 11, this electronic keyboard instrument has a plurality of reinforcing plates 14 provided with a plurality of reinforcing plates 14 provided on both sides in the longitudinal direction (left-right direction in FIG. 10) in the upper case 2 of the device body 1. It is the structure connected by the members 20 and 21, and it has the structure substantially the same as Embodiment 1 except this.

  As shown in FIGS. 10 to 12, the plurality of reinforcing members 20 and 21 are elongated angle members each having a cross-section formed in an L shape, and each intermediate portion overlaps and intersects with each other. One end 20a, 21a (left end in FIG. 10) is attached to the lower surface of one (left side in FIG. 10) reinforcing plate 14 by a screw member 22, and the other end 20b, 21b (right end in FIG. 109) is the other. The screw plate 22 is attached to the lower surface of the reinforcing plate 14 (right side in FIG. 10).

  In this case, since the plurality of reinforcing members 20 and 21 are formed in an L-shaped cross section each having a flat portion and a rising portion, both end portions 20a and 20b of one reinforcing member 20 are formed as shown in FIG. Is extended in the same plane as the plane portion of the reinforcing member 20, and both end portions 21a, 21b of the other reinforcing member 21 are bent below the plane portion of the reinforcing member 21 and extended in the horizontal direction. It is configured.

  That is, as shown in FIGS. 10 and 11, the other reinforcing member 21 has an intermediate portion that overlaps and intersects with one reinforcing member 20, so that it passes below the one reinforcing member 20. Further, both end portions 21a and 21b of the other reinforcing member 21 are bent vertically by the height of the reinforcing member 20 from the flat portion of the reinforcing member 21 downward as shown in FIG. The structure is extended in the horizontal direction.

  Further, as shown in FIGS. 10 and 11, the two reinforcing members 20, 21 are connected and fixed by screw members 23 at the intermediate portions where they overlap and intersect each other. The screw member 23 includes a bolt 23a and a nut 23b, and is configured to fasten and fix a portion where the two reinforcing members 20 and 21 intersect.

  In this case, the portion where the two reinforcing members 20, 21 overlap and intersect is the portion where the other reinforcing member 21 is arranged below the one reinforcing member 20, and the bolt 23a of the screw member 23 intersects in this state. It is configured to protrude from the reinforcing member 21 positioned on the lower side to the upper side of the reinforcing member 20 positioned on the upper side, and is fixed by screwing and tightening a nut 23b to the upper end portion of the protruding bolt 23a. ing.

  Accordingly, as shown in FIGS. 10 and 11, the upper case 2 has two reinforcing plates 14 provided on both sides in the longitudinal direction thereof connected and fixed by the two reinforcing members 20 and 21. As a result, the entire upper case 2 is reinforced, thereby preventing deformation of the entire upper case 2 such as warping and twisting.

  According to the mounting structure of the speakers 8 a to 8 c in such an electronic keyboard instrument, the plurality of speakers 8 a to 8 c and the reinforcing plate 14 are provided in a state of being separated on both sides in the longitudinal direction of the upper case 2 of the device body 1. Since the reinforcing plates 14 located on both sides are connected and fixed by the plurality of reinforcing members 20 and 21, the entire upper case 2 can be reinforced, thereby deforming the entire upper case 2 such as warping and twisting. Since it can block | prevent, it can prevent reliably that the whole upper case 2 vibrates at the time of sound-production of the some speakers 8a-8c, and this can also raise an acoustic effect.

  In this case, the plurality of reinforcing members 20 and 21 are attached to the lower surface of one reinforcing plate 14 by a screw member 22 in a state where the reinforcing members 20 and 21 overlap each other at their intermediate portions and intersect with each other. The portions 20b and 21b are attached to the lower surface of the other reinforcing plate 14 by the screw member 22, and the overlapping and intersecting portions are fixed by the screw member 23, so that the reinforcing plates 14 located on both sides of the upper case 2 are Can be more securely and firmly connected and fixed, whereby the entire upper case 2 can be further reinforced.

  In the above-described second embodiment, the case where the intermediate portions of the two reinforcing members 20 and 21 are simply overlapped and intersected is described. However, the present invention is not limited to this. The rising part in the intermediate part of the reinforcing member 20 may be cut out, and the other reinforcing member 21 located on the lower side may be inserted into the notched part so that both planar parts overlap and intersect. .

  If comprised in this way, since it is only necessary to extend the both ends 20a, 20b, 21a, 21b of the two reinforcement members 20, 21 on the same plane as the plane part, the whole of the two reinforcement members 20, 21 The height (thickness) can be reduced (thin), and the reinforcing plates 14 can be connected and fixed together by the two reinforcing members 20 and 21 in a compact manner.

  Moreover, in Embodiment 2 mentioned above, although the case where the reinforcement board 14 located in the both sides of the upper case 2 was connected and fixed by the two reinforcement members 20 and 21 was described, not only this but three or more reinforcement members The reinforcing plates 14 located on both sides of the upper case 2 may be connected and fixed together, and the reinforcing plates 14 located on both sides of the upper case 2 are connected by a single strip-shaped reinforcing member. You may comprise so that it may fix.

  Furthermore, although Embodiment 1 and 2 mentioned above and each modification example described the case where the one speaker part 8 corresponding to one reinforcement board 14 was the structure provided with the three speakers 8a-8c, it was not necessarily 3 The configuration need not be provided with two speakers 8a to 8c, and one speaker portion may be provided with two speakers, or may be provided with four or more speakers.

  In addition, in the above-described first and second embodiments and their modifications, the case where the present invention is applied to an electronic keyboard instrument has been described. However, the present invention is not limited to this, and can be applied to an electronic stringed instrument such as an electronic guitar. However, the present invention is not necessarily an electronic musical instrument, and can be widely applied to an electronic device having a plurality of speakers 8a to 8c, such as a stereo, an audio device, and a radio.

As mentioned above, although several embodiment of this invention was described, this invention is not restricted to these, The invention described in the claim and its equal range are included.
The invention described in the claims of the present application will be appended below.

(Appendix)
The invention according to claim 1 includes a device main body, a plurality of speakers attached to the device main body adjacent to each other, and the device main body at a location where the plurality of speakers are attached to the device main body. A reinforcing plate for reinforcing,
The reinforcement plate is provided with a plurality of speaker insertion holes into which the plurality of speakers are respectively inserted, and the reinforcement plate has at least a portion located between the plurality of speaker insertion holes. The speaker mounting structure is characterized in that a reinforcing portion for reinforcing the speaker is provided.

  According to a second aspect of the present invention, in the speaker mounting structure according to the first aspect, the reinforcing portion is provided on at least one surface of the front and back surfaces of the reinforcing plate that approaches the inner surface of the device main body. Further, the speaker mounting structure is characterized by being a plurality of ribs.

  According to a third aspect of the present invention, in the speaker mounting structure according to the first or second aspect, the plurality of ribs are pressed against an inner surface of the device main body. This is a speaker mounting structure.

  According to a fourth aspect of the present invention, in the speaker mounting structure according to any one of the first to third aspects, the plurality of speakers and the reinforcing plate are separated from each other in the longitudinal direction of the device main body. And the reinforcing plates located on both sides of the reinforcing plate are connected and fixed by a plurality of reinforcing members.

DESCRIPTION OF SYMBOLS 1 Apparatus main body 2 Upper case 3 Lower case 8 Speaker part 8a-8b Speaker 9a Baffle part 9b Magnet part 9c Cone part 9d Speaker net 12a-12c Speaker attachment hole 13 Attachment boss 14 Reinforcement plate 15 Screw 16a-16c Speaker insertion hole 17 Attachment Hole 18 Reinforcing part 18a Rib 20, 21 Reinforcing member 22, 23 Screw member

Claims (4)

A device main body, a plurality of speakers attached to the device main body adjacent to each other, and a reinforcing plate attached to the device main body and for reinforcing the device main body at a location where the plurality of speakers are attached. ,
The reinforcement plate is provided with a plurality of speaker insertion holes into which the plurality of speakers are respectively inserted, and the reinforcement plate has at least a portion located between the plurality of speaker insertion holes. A speaker mounting structure comprising a reinforcing portion for reinforcing the speaker.   2. The speaker mounting structure according to claim 1, wherein the reinforcing portion is a plurality of ribs provided on at least one surface of the reinforcing plate that approaches the inner surface of the device main body. The speaker mounting structure.   3. The speaker mounting structure according to claim 1, wherein the plurality of ribs are pressed against an inner surface of the device main body. 4. The speaker mounting structure according to any one of claims 1 to 3, wherein the plurality of speakers and the reinforcing plate are provided on both sides in the longitudinal direction of the device body, and are provided on both sides of the speaker body. The speaker mounting structure, wherein the positioned reinforcing plate is connected and fixed by a plurality of reinforcing members.

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