JP2019121865A - Acoustic apparatus and electronic music instrument - Google Patents

Abstract

To provide an acoustic apparatus and an electronic music instrument that can satisfactorily keep a sealed state of an acoustic space within the apparatus.SOLUTION: In a musical instrument case having a constitution in which a speaker panel 140 is built and fixed to a substrate case 120, the speaker panel 140 has a corner rib 14 having an outer surface corresponding to a shape of an inner surface side of a substrate side sealing frame-like part 24 of the substrate case 120 provided in a corner. Other than the corner of the speaker panel 140, the inner surface side of a panel side sealing frame-like part 42 within the speaker panel 140 adheres tightly to an outer surface side of the substrate side sealing frame-like part 24 within the substrate case 120 through a packing 12, and at the corner of the speaker panel 140, the outer surface side of the corner rib 14 within the speaker panel 140 adheres tightly to the inner surface side of the substrate side sealing frame-like part 24 within the substrate case 120 through the packing 12.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an acoustic device and an electronic musical instrument.

  Conventionally, in an audio instrument such as an electronic musical instrument or a speaker adopting a bass reflex structure or a sealed structure, as described in Patent Document 1 etc., a speaker provided with an upper case and a lower case and attached in the upper case A frame-shaped upper partition plate surrounding the side portion of the speaker is provided, and a frame-shaped lower partition plate surrounding the side portion of the speaker is provided in the lower case facing the upper partition plate, and these upper partition plate and lower partition plate There is known a device configured to form a speaker housing portion which is an acoustic space sealed by the.

JP 05-241574 A

  In an acoustic device having a structure provided with a closed-type acoustic space (speaker accommodating portion) as described in Patent Document 1, for example, in the design of a product, the layout of members provided in the inside, restrictions on manufacturing technology, etc. As a result, the shapes of the upper case and the lower case are different, and there may be a case where it is not possible to arrange the partition plates of each other facing each other. ing.

  Then, in view of the above-mentioned subject, this invention aims at providing an audio instrument and an electronic musical instrument which can secure the sealed state of acoustic space inside an apparatus favorably.

The acoustic device according to the present invention is
A first housing having an inner frame,
A second casing having an outer frame at a corner and a corner rib member disposed inside the outer frame;
Equipped with
By bringing the inner frame into close contact between the outer frame and the corner rib member, an acoustic space provided inside the inner frame and the outer frame, and an outer side of the inner frame and the inner side of the outer frame It is characterized in that it is separated from the provided corner space.

  According to the present invention, the sealed state of the acoustic space inside the device can be favorably maintained.

BRIEF DESCRIPTION OF THE DRAWINGS It is a general view which shows the electronic keyboard musical instrument which is one Embodiment of the audio equipment and electronic musical instrument which concern on this invention. FIG. 6 is a schematic view showing an example of a base case applied to an electronic keyboard instrument according to an embodiment. FIG. 6 is a schematic view showing an example of a speaker panel applied to an electronic keyboard instrument according to an embodiment. FIG. 7 is a detail view showing the main parts of the speaker panel applied to the electronic keyboard instrument according to the embodiment; It is a schematic diagram (the 1) showing an example of the assembling method of the electronic keyboard instrument concerning one embodiment. It is the schematic (the 2) which shows an example of the assembling method of the electronic keyboard instrument which concerns on one Embodiment. It is the schematic (the 3) which shows an example of the assembling method of the electronic keyboard instrument which concerns on one Embodiment. FIG. 6 is a schematic view showing an example of a packing applied to a base case of the electronic keyboard instrument according to the embodiment. It is a schematic diagram (the 1) showing the closed structure in the attachment state of the electronic keyboard instrument concerning one embodiment. It is the schematic (the 2) which shows the airtight structure in the assembly | attachment state of the electronic keyboard instrument which concerns on one Embodiment. It is the schematic (the 3) which shows the airtight structure in the assembly | attachment state of the electronic keyboard instrument which concerns on one Embodiment. FIG. 5 is a schematic view showing an acoustic space defined in the electronic keyboard instrument according to one embodiment.

  DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will now be described in detail with reference to the drawings. In the present embodiment, an electronic keyboard instrument (electronic keyboard) will be described as an example of the acoustic device and the electronic musical instrument according to the present invention.

<Electronic keyboard instrument>
FIG. 1 is an overall view showing an electronic keyboard instrument which is an embodiment of an audio instrument and an electronic instrument according to the present invention. FIG. 2 is a schematic view showing an example of a base case applied to the electronic keyboard instrument according to the present embodiment, and FIG. 3 is an outline showing an example of a speaker panel applied to the electronic keyboard instrument according to the present embodiment. FIG. 4 is a view, and FIG. 4 is a detailed view showing the main parts of a speaker panel applied to the electronic keyboard instrument according to the present embodiment.

  As shown in FIG. 1, the electronic keyboard instrument 100 according to this embodiment is roughly divided into a base case 120 in which the keyboard unit 110 is incorporated, a speaker 130 and a speaker panel 140 in which the speaker grill 150 is incorporated. , And a center panel 160 provided with the display unit 170 and the operation switches 180, and the like.

  As shown in FIG. 2, the base case 120 has a box shape elongated in the lateral direction of the drawing and has a structure in which the upper side of the drawing is open. In the region along the drawing lower side (hereinafter referred to as the “front side”) in the base case 120, as shown in FIG. A keyboard mounting portion 22 is provided on which a known keyboard unit 110 arranged in the above is mounted.

  In addition, as shown in FIG. 2, base-side closed frame-like portions defining an acoustic space 10 described later on the left and right end portions of the side surface (hereinafter referred to as “rear side”) on the drawing upper side in the base case 120. 24 are provided respectively. Further, a battery storage portion 26 is provided in a region between the left and right base-side closed frame-shaped portions 24 in the rear side portion in the base case 120.

  Here, as shown in FIG. 2, the base-side hermetic frame-shaped portion 24 is an outer peripheral side frame portion 24 a continuously extending along the outer edge portions of the rear side portion and the left and right end portions of the base case 120; An inner side frame portion 24 b continuously extends along the boundary portion of the keyboard mounting portion 22 in the base case 120 and the boundary portion of the battery storage portion 26. The entire circumference of the acoustic space 10 in the base case 120 is surrounded by the outer peripheral side frame portion 24a and the inner side frame portion 24b.

  Also, packing (not shown in the drawings; details will be described later) on the upper end portions of the outer peripheral side frame portion 24a and the inner side frame portion 24b of the base side sealing frame 24 (open end side of the base case 120; boundary of acoustic space). Is provided over the entire circumference, and the left and right speaker panels 140 are attached closely to the base side sealing frame 24 through packings. Here, a plurality of panel assembly bosses 28 having screw insertion holes for assembling and fixing the speaker panel 140 are provided in the vicinity of the left and right base-side closed frame-shaped portions 24 in the base case 120. .

  As shown in FIGS. 3A and 3B, the speaker panel 140 is internally provided with a speaker 130, a tweeter 32, and a bass reflex port 34, and is disposed at the left and right ends of the rear side of the base case 120. . The speaker panel 140 is attached on the base case 120 so as to have a shape corresponding to both sides of the base-side closed frame 24 of the base case 120 and the keyboard unit 110. Further, as shown in FIG. 3B, the panel side sealing frame 42 which defines the acoustic space 10 in the speaker panel 140 is a base side sealing frame 24 of the base case 120 inside the speaker panel 140. It has a shape corresponding to.

  Here, as shown in FIG. 3B, the panel side sealing frame portion 42 is continuous along the outer side of the side surface (rear side) and the right side (or left side) of the upper side of the drawing of the speaker panel 140. And an inner side frame portion 42b extending continuously along the boundary portion of the keyboard mounting portion 22 in the speaker panel 140 and the boundary portion of the battery storage portion 26. ing.

  In the speaker panel 140, the panel-side sealing frame portion 42 has a base-side sealing frame shape of the base case 120 due to, for example, the design of the product, the layout of members provided inside, and restrictions on molding technology. In addition to the above-described panel-side sealing frame portion 42, a separate sealing member is provided at a portion (for example, a corner portion) which does not correspond to the shape of the portion 24.

  Specifically, as shown in, for example, the upper right of FIG. 4 (a) or FIG. 4 (b), the outer peripheral side frame 42a of the panel side sealing frame 42 of the speaker panel 140 is steep in a substantially right-angled shape. As shown in the upper left of FIG. 8 which will be described later, for example, as shown in the upper left of FIG. It is assumed to be gently bent with arc-shaped or curvilinear corners of a predetermined radius. In this case, in the present embodiment, a corner rib 14 as a sealing member is provided inside the outer peripheral side frame portion 42 a of the corner portion of the speaker panel 140.

  The corner rib 14 shown in FIGS. 4A and 4B extends from the inner bottom surface of the speaker panel 140 (corresponding to the mounting surface of the speaker 130) toward the open end direction in the upper side of the drawing to the outer peripheral side frame portion 42a. The shape of the outer side (the surface on the outer peripheral side frame portion 42a side of the corner portion) of the base side sealing frame portion 24 of the base case 120, which extends independently and substantially parallelly, is planarly viewed from the open end side. It has a gentle arc shape or a curved shape corresponding to the shape (first shape) inside the corner.

  Further, as shown in FIG. 4B, the corner ribs 14 are provided at both ends in the extending direction of the shape having a circular arc shape in plan view (or the extending direction of the packing), and the outer peripheral side frame portion The reinforcing ribs 16a and 16b are connected substantially at right angles to the inner surface side of 42a. In these reinforcing ribs 16a and 16b, as shown in FIG. 4 (b) and FIG. 9 (b), which will be described later, the speaker panel 140 is formed between the corner rib 14 and the outer peripheral side frame 42a. The packing provided at the upper end of the base-side sealing frame 24 of the base case 120 is a plane perpendicular to the extending direction of the corner rib 14 (or the extending direction of the packing). A notch-like close contact portion 18 is provided so as to be in close contact with the outer periphery of the packing so as to press and dig in along the outer periphery of the packing. In particular, a part of the adhesion part 18 has the projecting part 18a which protrudes in the direction of the outer peripheral side frame part 42a from the outer surface of the corner rib 14, whereby the base side sealing frame part is assembled when assembled to the base case 120. The packing of 24 is pressed and fixed in close contact along the outer surface of the corner rib 14 having an arc shape.

  Thus, the corner ribs 14 and the reinforcing ribs 16 a and 16 b enhance the structural strength of the corner ribs 14 independently extending to the inside of the speaker panel 140, and at the same time, the musical instrument case in which the speaker panel 140 is assembled to the base case 120. At the corner, the acoustic space 10 inside the corner rib 14 and the corner space 20 outside the corner rib 14 that is connected to the space outside the instrument case are divided into an acoustic space inside the instrument case It has a role of defining 10 (see FIGS. 10 (a), (b), FIG. 11, FIG. 12, etc. described later). The sealing structure when the speaker panel 140 is assembled to the base case 120 will be described in detail later.

  Here, when resin molding the speaker panel 140, the corner ribs 14 and the reinforcing ribs 16a and 16b are integrally molded with other members such as the outer peripheral side frame portion 42a and the bottom surface. In addition, the corner rib 14 and the reinforcing ribs 16a and 16b are designed not to have a through hole or a groove accompanied by the passage of air in order to separate the acoustic space 10 and the corner space 20 connected to the outside of the instrument case. There is.

  As described above, in the present embodiment, the speaker panel 140 includes the outer peripheral side frame portion 42 a and the inner side frame portion 42 b of the panel side sealing frame shaped portion 42, and the corner rib 14 and the reinforcing ribs 16 a and 16 b provided at the corner. And the entire circumference of the acoustic space 10 in the speaker panel 140 is surrounded.

  That is, the outer peripheral side frame portion 42 a and the inner side frame portion 42 b of the panel side sealing frame portion 42 and the corner rib 14 provided at the corner correspond to the shape of the upper end portion of the base side sealing frame portion 24 of the base case 120. The base case 120 and the speaker panel 140 are assembled in close contact with each other through the packing.

  Here, a panel provided with screw holes in the vicinity of the panel-side closed frame-shaped portion 42 in the left and right speaker panels 140 so as to correspond to the positions of the plurality of panel assembly bosses 28 provided on the base case 120. A plurality of assembly bosses 38 are provided. Further, as shown in FIGS. 3 (b), 4 (a) and 4 (b), a pair of reinforcing ribs 40 for enhancing the housing strength of the speaker panel 140 is provided in the vicinity of each panel mounting boss 38. For example, it has the shape connected to the outer peripheral side frame part 42a and the inner side frame part 42b of the panel side sealing frame-like part 42, and is provided integrally. The panel mounting boss 38 and the reinforcing rib 40 are provided in the vicinity of the corner rib 14 in order to enhance the housing strength at the corner portion of the speaker panel 140 including the corner rib 14 when the speaker panel 140 is assembled to the base case 120. Provided. Alternatively, as shown in FIGS. 4 (a) and 4 (b), a pair of reinforcing ribs 16b provided on one end side of the corner rib 14 is provided in proximity to the panel assembling boss 38 provided in the vicinity of the corner. Are shared with one of the reinforcing ribs 40 of FIG.

  As shown in FIG. 1, the speaker grill 150 is provided on the upper surface side of the speaker panel 140 and protects the sound emitting surface of the speaker 130 and the tweeter 32 exposed from the speaker panel 140. As shown in FIG. 6, which will be described later, the speaker grill 150 generally has, for example, a plurality of protrusions projecting in the vertical direction with respect to the grill main body 52 at the outer peripheral portion 54 of the grill main body 52 provided with mesh sound holes. It has 56.

<How to assemble an electronic keyboard instrument>
Next, a method of assembling the electronic keyboard instrument having the above-described configuration will be described. Here, in addition to the assembling method of the electronic keyboard instrument described above, the sealing structure of the acoustic space unique to the present embodiment will be described.

  5 to 7 are schematic views showing an example of the method of assembling the electronic keyboard instrument according to the present embodiment. Here, FIG. 5 is a schematic view showing a method of assembling the speaker to the speaker panel, FIG. 6 is a schematic view showing a method of assembling the speaker cover and the speaker grille to the speaker panel, and FIG. FIG. 6 is a schematic view showing a specific example of a method of assembling a speaker grille. FIG. 8 is a schematic view showing an example of a packing applied to the base case of the electronic keyboard instrument according to the present embodiment, and FIGS. 9 to 11 are assembled states of the electronic keyboard instrument according to the present embodiment. It is the schematic which shows the sealed structure in. Here, FIG. 9 is a schematic view showing an example of the tightness of packing in the speaker panel, FIG. 10 is a schematic diagram showing another example of the tightness of packing in the speaker panel, and FIG. It is the figure which looked at the close_contact | adherence state of the packing in a panel from the base case side. FIG. 12 is a schematic view showing an acoustic space defined in the electronic keyboard instrument according to the present embodiment.

  In the method of assembling the electronic keyboard instrument according to the present embodiment, first, as shown in FIGS. 5A and 5B, the speaker 130 is mounted on the speaker mounting portion in the speaker panel 140 and screwed. Next, as shown in FIG. 6, after the speaker cover 50 is screwed on the upper surface side (sound output surface side) of the speaker panel 140 to which the speaker 130 is attached, the speaker grill 150 is attached.

  Specifically, as shown in FIGS. 3 (b), 5 (b), and 6, the speaker panel 140 corresponds to the members of the speaker panel 140 so as to correspond to the positions of the protrusions 56 of the speaker grill 150. It has a plurality of mounting holes 44, 46 provided through it. Then, each protrusion 56 of the speaker grill 150 is inserted into the mounting holes 44 and 46, and the tip end of each protrusion 56 exposed inside the speaker panel 140 is twisted and deformed (hereinafter referred to as "twist deformation") Thus, the speaker grill 150 is attached and fixed to the speaker panel 140.

  Here, in the case where the mounting hole 44 provided in the speaker panel 140 has a through hole connected to the acoustic space provided in the inside, as shown in FIGS. 7A to 7C, the speaker panel 140 is provided. The elastic member 58 is interposed between the mounting hole 44 and the projection 56 by attaching the elastic member 58 made of a resin material such as silicon to the projection 56 exposed inside. Then, as shown in FIG. 7D, the elastic member 58 is deformed inside the mounting hole 44 by twisting the tip end side of the projection 56, and the surface of the projection 56 and the inner surface of the mounting hole 44 are deformed. The mounting hole 44 which is in close contact with the through hole is closed, and the speaker grill 150 is locked and fixed to the speaker panel 140.

  7 (a) to 7 (d), the insertion direction of the protrusion 56 (upward in FIG. 7 (a), as shown in FIGS. 7 (a) to 7 (d)). In b), by providing a hole rib 48 consisting of a thick portion projecting downward, the housing strength can be enhanced, and the elastic member 58 is in close contact in a wide range between the mounting hole 44 and the projection 56 And the mounting hole 44 can be almost completely closed.

  Further, the elastic member 58 is attached to the projection 56 of the speaker grill 150 and fixed to the speaker panel 140, so that the acoustic space is sealed even when the mounting hole 44 is disposed at a position penetrating the acoustic space. Since it is possible to secure the flexibility, the mounting position of the speaker grill 150 and the design freedom of the mounting structure can be improved to contribute to the downsizing of the musical instrument case of the electronic keyboard instrument.

  Then, the speaker panel 140 to which the speaker 130 and the speaker grill 150 are assembled is attached to the left and right ends of the rear side of the base case 120. Specifically, as shown in FIG. 8, first, the packing 12 is continuously provided on the upper end portion of the base-side closed frame-shaped portion 24 in the base case 120. After that, as shown in FIGS. 9 and 10, the panel side sealing frame 42 (the outer peripheral side frame 42a, the inner side frame 42b) and the corner rib 14 in the speaker panel 140 intervene through the packing 12 as shown in FIGS. It assemble | attaches so that it may closely_contact | adhere to the base | substrate side sealing frame-like part 24 (The outer peripheral side frame 24a, the inner side frame 24b). Thereby, as shown in FIG. 12, a space (within thick lines in the drawing) surrounded by the base-side sealing frame 24 of the base case 120 and the panel-side sealing frame 42 and the corner rib 14 of the speaker panel 140 It is enclosed and defined as an acoustic space 10.

  Here, in the state where the speaker panel 140 is assembled to the base case 120, the plurality of panel assembling bosses 28 provided in the base case 120 and the plurality of panel assembling bosses 38 provided in the speaker panel 140. Respectively correspond to each other in a one-to-one relationship, and the speaker panel 140 is assembled and fixed to the base case 120 by screwing the set of the respective panel assembling bosses 28 and 38.

  More specifically, the sealing structure in the state where the speaker panel 140 is assembled to the base case 120 is the base-side closed frame-shaped portion 24 in the base case 120 other than the corner of the speaker panel 140 provided with the corner rib 14. As shown in FIGS. 9 (a) and 9 (b), in the region where the panel-side sealing frame 42 is in close contact with the speaker panel 140, the base-side sealing frame 24 in the base case 120 is The lower end portion of the panel-side closed frame-like portion 42 of the speaker panel 140 is pressed against the upper end portion so as to face the packing 12 and is in close contact therewith. Alternatively, as shown in FIG. 10C and FIG. 11, the inner surface side of the panel side sealing frame 42 in the speaker panel 140 is packed against the outer surface of the base side sealing frame 24 in the base case 120. It is pressed to be in close contact with each other via 12 and is in close contact.

  Here, as described above, a pair of reinforcing ribs 40 are provided in the vicinity of the panel assembly boss 38 screwed and fixed when the speaker panel 140 is assembled to the base case 120, and integrally formed on the corner rib 14. Similar to the reinforcing ribs 16a and 16b to be provided, a notch-like adhesion portion 41 is provided which closely contacts the outer periphery of the packing 12 so as to press and crawl along the plane orthogonal to the extending direction of the packing 12. . Thereby, when the speaker panel 140 is assembled to the base case 120, the packing 12 of the base side sealing frame portion 24 is pressed by the contact portion 41 of the reinforcing rib 40, and along the inner surface of the panel side sealing frame portion 42. It is fixed in the state where it was in close contact.

  On the other hand, at the corner of the speaker panel 140 provided with the corner rib 14, as shown in FIGS. 10 (a), (b) and FIG. 11, the inner surface side of the base side sealing frame 24 inside the base case 120. On the other hand, the outer surface of the corner rib 14 in the speaker panel 140 is pressed against and closely attached via the packing 12. In addition, the reinforcing ribs 16a and 16b provided at both end portions in the extending direction of the corner rib 14 are provided with a notch-like adhesion portion 41 including a projecting portion 18a protruding from the outer surface of the corner rib 14 . As a result, when the speaker panel 140 is assembled to the base case 120, the packing 12 of the base side sealing frame 24 is pressed by the contact portions 18 and the projection 18a of the reinforcing ribs 16a and 16b, and the outside of the corner rib 14 It is fixed in close contact with the surface of the

  Here, since the corner rib 14 and the reinforcing ribs 16a and 16b are designed so as not to have a through hole or a groove accompanied by the passage of air, the base side sealing frame 24 of the base case 120 and the speaker panel 140 The space inside the panel side sealing frame 42 is defined as the acoustic space 10, and the corner of the speaker panel 140 is the outside of the corner rib 14 and the panel side sealing frame 42 of the speaker panel 140 The corner space 20 defined inside and the above-mentioned acoustic space 10 are divided and a sealed state is secured. That is, as shown in FIG. 11, the corner space 20 at the corner of the speaker panel 140 is a space surrounded by the corner rib 14, the reinforcing ribs 16a and 16b, and the panel side sealing frame 42 of the speaker panel 140. It is connected to the space outside the instrument case.

  As described above, in the present embodiment, when the speaker panel 140 is assembled to the base case 120, the packing 12 continuously provided on the upper end portion of the base-side hermetic frame portion 24 in the base case 120 is used as a speaker In the case where the shape of the case to be assembled is different by being pressed and in close contact with the inner surface side of the panel side sealing frame-like portion 42 in the panel 140 and the outer surface of the corner rib 14 Without being affected, the sound tightness of the acoustic space inside the musical instrument case can be satisfactorily secured, and the occurrence of sound, air leakage and vibration noise can be well prevented. Further, in this case, the corner rib 14 and the reinforcing ribs 16a and 16b can be integrally formed with the speaker panel 140, and there is no need to prepare a separate component and attach it to the case. The sealing property of the acoustic space can be favorably secured with a simple configuration without increasing the product cost.

  Further, by providing the reinforcing ribs 16a and 16b integrally with the corner rib 14, the housing strength of the corner portion of the speaker panel 140 can be enhanced, and the sealing property of the acoustic space can be favorably maintained. Further, by providing a panel assembling boss 38 and a reinforcing rib 40 for assembling and fixing the base case 120 and the speaker panel 140 in the vicinity of the corner rib 14, or a panel assembling boss in the vicinity of the corner rib 14 By sharing the 38 reinforcing ribs 40 as the reinforcing ribs 16a and 16b of the corner rib 14, when the base case 120 and the speaker panel 140 are assembled, the housing strength of the corner can be further enhanced. Good sealing of the acoustic space can be ensured.

  In the embodiment described above, an electronic keyboard instrument (electronic keyboard) has been shown and described as an example of the audio device provided with the device case according to the present invention, but the present invention is not limited to this. In addition, the present invention may be applied to a single speaker or an audio device.

Although some embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, but includes the invention described in the claims and the scope of equivalents thereof.
In the following, the invention described in the original claims of the present application is appended.

(Supplementary note)
[1]
A first housing having an inner frame,
A second casing having an outer frame at a corner and a corner rib member disposed inside the outer frame;
Equipped with
By bringing the inner frame into close contact between the outer frame and the corner rib member, an acoustic space provided inside the inner frame and the outer frame, and an outer side of the inner frame and the inner side of the outer frame An audio device characterized in that the provided corner space is partitioned.

[2]
It has a projection which protrudes in the direction of the outer frame from the corner rib member,
The acoustic device according to claim 1, wherein the inner frame is pressed by the projecting portion, and the corner rib member and the inner frame are in close contact and fixed.

[3]
The acoustic device according to [1] or [2], wherein the inner frame includes an elastic member continuously provided along the boundary of the acoustic space.

[4]
The acoustic device according to any one of [1] to [3], wherein an outer shape of the corner rib member includes a shape according to a first shape on an inner side of a corner of the inner frame.

[5]
The corner rib member is provided with a reinforcing member for reinforcing the strength of the corner rib member when the second casing and the first casing are assembled [1] to [1]. 4] The acoustic equipment as described in any of.

[6]
The acoustic device according to [5], wherein the reinforcing members are respectively provided on both end sides in the extending direction of the corner rib member.

[7]
The reinforcing member includes an intimate portion including the protrusion and pressing the outer periphery of the inner frame along a plane orthogonal to the extending direction of the corner rib member.
The acoustic device according to [5] or [6], wherein the inner frame is pressed by the close contact portion and is in close contact with and fixed to the outer frame and the corner rib member.

[8]
The second housing includes a plurality of assembling portions for assembling the first housing and the second housing in close contact with each other through the elastic member in the acoustic space, and the plurality of assembling And supporting members respectively disposed on both sides of the part;
The acoustic device according to any one of [5] to [7], wherein the reinforcing member is shared as a support member on one side of any one of the plurality of assembling parts. .

[9]
A sound generator is assembled to the first housing,
The acoustic device according to any one of [1] to [8], wherein the acoustic space is a space where a sound wave emitted from the sound generator resonates.

[10]
An operator for specifying the pitch,
A first housing having an inner frame,
A second casing having an outer frame at a corner and a corner rib member disposed inside the outer frame;
Equipped with
By bringing the inner frame into close contact between the outer frame and the corner rib member, an acoustic space provided inside the inner frame and the outer frame, and an outer side of the inner frame and the inner side of the outer frame An electronic musical instrument characterized in that it is separated from a corner space provided.

10 sound space 12 packing (elastic member)
14 Corner rib (corner rib member)
16a, 16b Reinforcement rib (reinforcement member)
18 adhesion portion 18a protrusion portion 20 corner portion space 24 base side sealing frame portion 24a outer peripheral side frame portion 24b inner side frame portion 28, 38 panel assembling boss 40 reinforcing rib (supporting member)
41 close contact portion 42 panel side sealing frame portion 42a outer peripheral side frame portion 42b inner side frame portion 100 electronic keyboard instrument 120 base case (first housing)
130 Speaker (sound generator)
140 Speaker panel (2nd case)

Claims (10)

A first housing having an inner frame,
A second casing having an outer frame at a corner and a corner rib member disposed inside the outer frame;
Equipped with
By bringing the inner frame into close contact between the outer frame and the corner rib member, an acoustic space provided inside the inner frame and the outer frame, and an outer side of the inner frame and the inner side of the outer frame An audio device characterized in that the provided corner space is partitioned. It has a projection which protrudes in the direction of the outer frame from the corner rib member,
The acoustic device according to claim 1, wherein the inner frame is pressed by the projecting portion, and the corner rib member and the inner frame are in close contact and fixed.   The acoustic device according to claim 1, wherein the inner frame includes an elastic member continuously provided along the boundary of the acoustic space.   The acoustic device according to any one of claims 1 to 3, wherein an outer shape of the corner rib member includes a shape according to a first shape on an inner side of a corner of the inner frame.   The corner rib member is provided with a reinforcing member for reinforcing the strength of the corner rib member when the second housing and the first housing are assembled. Audio equipment according to any of the above.   The said reinforcement member is each provided in the both end side of the extension direction of the said corner rib member, The audio equipment of Claim 5 characterized by the above-mentioned. The reinforcing member includes an intimate portion including the protrusion and pressing the outer periphery of the inner frame along a plane orthogonal to the extending direction of the corner rib member.
The acoustic device according to claim 5 or 6, wherein the inner frame is pressed by the close contact portion and is in close contact with and fixed to the outer frame and the corner rib member. The second housing includes a plurality of assembling portions for assembling the first housing and the second housing in close contact with each other through the elastic member in the acoustic space, and the plurality of assembling And supporting members respectively disposed on both sides of the part;
The acoustic device according to any one of claims 5 to 7, wherein the reinforcing member is shared as a support member on one side of any one of the plurality of assembly parts. A sound generator is assembled to the first housing,
The acoustic device according to any one of claims 1 to 8, wherein the acoustic space is a space where a sound wave emitted from the sound generator echoes. An operator for specifying the pitch,
A first housing having an inner frame,
A second casing having an outer frame at a corner and a corner rib member disposed inside the outer frame;
Equipped with
By bringing the inner frame into close contact between the outer frame and the corner rib member, an acoustic space provided inside the inner frame and the outer frame, and an outer side of the inner frame and the inner side of the outer frame An electronic musical instrument characterized in that it is separated from a corner space provided.