JP6344133B2 - Electronics - Google Patents

Description

  The present application relates to an electronic device incorporating a speaker.

  2. Description of the Related Art Conventionally, an electronic device that displays an image with sound, such as a television, a personal computer, or an optical disk playback device, is equipped with a speaker that outputs sound to the outside. When the sound generated by the speaker is output from the front surface or the upper surface of the housing of the electronic device, there is room in the housing, and therefore the speaker may be attached to the back side of the housing with a vibration isolating material interposed therebetween (Patent Document 1). reference). In addition, a duct-shaped rib is provided inside the housing of the electronic device, and a speaker is attached to the housing with a cushion material interposed therebetween so that sound does not leak from the rib (see, for example, Patent Document 2). .

  On the other hand, when the electronic device is a notebook personal computer, the display unit and the main unit are separated, and the main unit is also downsized. A speaker is mounted in the housing for output. When mounting a speaker on a laptop personal computer, attach the speaker to the duct with a cushioning material for preventing sound leakage so that sound leakage from the speaker mounted in the narrow housing does not spread inside the housing. It was done.

Registered Utility Model No. 3048394 JP 2011-182050 A

  However, when a speaker is mounted on a notebook personal computer, a cushioning material for preventing sound leakage from the duct is necessary, which increases the number of parts. In addition, since sound is emitted only from the speaker in the lateral direction of the housing, the opening of the speaker is reduced, resulting in poor sound quality.

  In one aspect, an object of the present application is to provide an electronic device capable of reducing the number of components when a speaker is attached to a narrow housing and improving the sound quality of the speaker output from the housing. And

  According to one embodiment, the electronic device includes a speaker in the housing, and the sound emitting unit that emits sound waves output from the speaker of the housing to the outside prevents sound waves from leaking into the housing. The speaker is attached to a plate member that fits the shape of the upper end of the duct, and there are at least two protruding pieces that fix the plate member to the housing on the outer periphery of the plate member. Protrusions provided on the top surface with mounting portions corresponding to the projecting pieces are provided inside the housing, and the plate member aligns the positions of the projecting pieces and the projecting portions, and the duct The projecting piece and the projecting part are formed so that a gap is opened between the projecting piece and the top surface of the projecting part while being placed on the upper end part. If it is eliminated, an electronic device in which the plate member is pressed against the upper end of the duct is provided.

  According to the disclosed electronic apparatus, it is possible to reduce the number of components when the speaker is attached to the housing, and it is possible to improve the sound quality of the speaker output from the housing.

(A) is a perspective view which shows the position of the sound emission part from the speaker in one Embodiment of the electronic device of this application which incorporates a speaker, (b) is a left view of the electronic device shown to (a), (c) ) Is a right side view of the electronic apparatus shown in FIG. (A) is a plan view showing the lower housing of the electronic device shown in FIG. 1 separately from the upper housing, (b) is a cross-sectional view taken along the line AA of (a), and (c) is (a) It is sectional drawing in the BB line of FIG. FIG. 3 is a perspective view of a single lower casing obtained by removing a mounting component from the lower casing of the electronic device illustrated in FIG. (A) is an exploded perspective view of the speaker assembly mounted on the lower housing of the electronic device shown in FIG. 2 (a), and (b) shows only the speaker taken out from the speaker assembly shown in (a). The side view, (c) is the perspective view which looked at the state after the assembly of the speaker assembly shown in (a) from the back side of the speaker assembly, (d) is the speaker assembly shown in (c) from the sound emission side. FIG. FIG. 4 is an assembled perspective view showing a state in which the speaker assembly shown in FIG. 4C is assembled to the lower housing shown in FIG. 3. FIG. 6 is a side sectional view showing a state in which the speaker assembly shown in FIG. 5 is placed in a duct of the lower housing and fastened with screws. (A) is a perspective view which shows the position of the sound emission part from the speaker in the electronic device of other embodiment of this application which incorporates a speaker, (b) closed the indicator of the electronic device shown to (a). It is the perspective view which looked at the state from the bottom side. (A) shows the state in which the speaker assembly of the first embodiment is placed on the sound emitting portion of the lower housing in the electronic apparatus of the other embodiment shown in FIGS. 7 (a) and 7 (b). FIG. 4B is an assembled perspective view, and FIG. 4B is a side view showing a state where the speaker assembly shown in FIG. 4A is placed on the duct of the lower housing and fastened with screws. FIGS. 7A and 7B are assembled perspective views illustrating a state in which the speaker assembly of the second example is placed on the sound emitting portion of the lower housing in the electronic device of the other embodiment illustrated in FIGS. is there. FIG. 8A is a perspective view showing a modified example of a plate member for mounting a speaker forming the speaker assembly of the first embodiment shown in FIG. 8A, and FIG. 9B is a second embodiment shown in FIG. The perspective view which shows the modification of the plate member for speaker attachment which forms the speaker assembly of an example, (c) is the speaker assembly using the plate member shown in (a) is mounted in the duct of the lower case, The side view which shows the state fastened with a screw | thread, (d) is a side view which shows the state in which the speaker assembly shown to (c) was fastened by the boss | hub of the lower housing | casing with a screw | thread.

  Hereinafter, embodiments of the present application will be described in detail based on specific examples with reference to the accompanying drawings. Note that members having the same function are described with the same reference numerals even if they have different shapes.

  FIG. 1A shows the appearance of an electronic device 10 according to an embodiment incorporating a speaker. FIG. 1B shows the electronic device 10 as viewed from the left side, and FIG. Is the electronic device 10 viewed from the right side. In the electronic device 10, the display 3 is attached to the upper housing 1 by the link mechanism 9, and the state shown in FIGS. 1 (a) to 1 (c) is that the display 3 uses the link mechanism 9. This is a state caused by 1. A lower housing 2 is provided below the upper housing 1. The lower housing 2 has a sound emission part 4 that emits sound on the left side and the right side, and a slit 5 is formed in the sound emission part 4.

  FIG. 2A shows a right side portion of the electronic device 10 shown in FIGS. 1A to 1C in a state where the lower housing 2 is separated from the upper housing 1, and FIG. The cross section in the AA line of Fig.2 (a) is shown, and FIG.2 (c) has shown the cross section in the BB line of Fig.2 (a). A circuit board 11 and a reinforcing sheet metal 13 are attached to the lower housing 2. The sound emitting part 4 of the lower housing 2 has a reinforcing frame 12, and the speaker assembly 20 is attached to the reinforcing frame 12 and the reinforcing sheet metal 13 with three screws 26.

  In the speaker assembly 20, a speaker unit 21 is attached to a sheet metal plate member 30 with a rubber bush 24, a washer 25, and a screw 26. The plate member 30 is provided with a first projecting piece 31 and a second projecting piece 32 on the outer periphery thereof, and the first projecting piece 31 is attached to the reinforcing sheet metal 13 with a screw 26, and the second projecting piece 32 is attached to the boss 7 with a screw 26 via the reinforcing frame 12. The reinforcing frame 12 is provided with a positioning projection 15, and the second projecting piece 32 is positioned with respect to the reinforcing frame 12 by inserting a positioning hole 35 provided at the tip portion into the positioning projection 15.

  FIG. 3 shows only the lower housing 2 by removing all the mounted components from the lower housing 2 of the electronic device shown in FIG. In the lower housing 2 of the present embodiment, the side surface 2S is formed obliquely with respect to the bottom surface 2B, and the sound emitting portion 4 is provided at a portion where the bottom surface 2B and the side surface 2S intersect. A plurality of slits 5 are provided on the bottom surface 2B and the side surface 2S of the sound emitting unit 4 to communicate the inside and outside of the lower housing 2 respectively. A duct 6 that surrounds the slit 5 protrudes from the sound emitting portion 4 of the lower housing 2. In the present embodiment, the upper end portion 6T of the duct 6 is inclined obliquely because the side surface 2S is inclined. The upper end portion 6T of the duct 6 is on one plane, and the speaker assembly 20 is attached thereto. A boss 7 and a rib 8 project from the bottom surface 2 </ b> B outside the duct 6. There is a screw hole 17 on the top surface of the boss 7.

  FIG. 4A shows an exploded view of the structure of the speaker assembly 20 shown in FIG. The speaker assembly 20 includes a flat plate member 30 made of sheet metal, a speaker unit 21, a rubber bush 24, a washer 25, and a screw 26. The speaker unit 21 is a unit in which a speaker (not shown) is housed in a box body 28 having an opening 27, and mounting legs 22 project from the opposite side surfaces. The mounting leg 22 has a recess 29 into which the groove 24M of the rubber bush 24 is inserted. Further, as shown in FIG. 4B, a rib 27 </ b> R is provided around the opening 27, and the rib 27 </ b> R is inserted into the hole 37 of the plate member 30.

  The plate member 30 has a hole 37 for receiving a rib 27R formed around the opening 27 of the speaker unit 21 at the center, and rubber bush mounting columns 34 for attaching the rubber bush 24 to both ends in the longitudinal direction. Has been. A screw hole 38 is provided in the top surface of the rubber bush mounting column 34. A first projecting piece 31 and a second projecting piece 32 are provided on the outer peripheral portion of the plate member 30. The first projecting piece 31 has a mounting hole 39 at the tip. When the plate member 30 is attached to the oblique upper end 6T of the duct 6 shown in FIG. 3, the first protruding piece 31 is bent twice so that the attachment hole 39 is parallel to the bottom surface 2B. The second projecting piece 32 includes a base portion 32B on the same surface as the plate member 30, and a tongue piece portion 32T projecting in a tongue-like shape from the base portion 32B. The tongue piece portion 32T is bent obliquely upward with respect to the base portion 32B, and the bending angle is parallel to the bottom surface 2B when the plate member 30 is attached to the oblique upper end portion 6T of the duct 6 shown in FIG. Is an angle.

  The rubber bush 24 inserted into the mounting leg 22 of the speaker unit 21 has a through hole 24H. The rubber bush mounting column 34 of the plate member 30 is inserted into the through hole 24H so that the speaker unit 21 is mounted on the plate member 30. Placed on. At this time, the rib 27 </ b> R shown in FIG. 4B is inserted into the hole 37 of the plate member 30. In the speaker unit 21 placed on the plate member 30, a screw 26 is inserted into a washer 25 placed on the top surface of the rubber bush 24, and the screw 26 is screwed into a screw hole 38 on the top surface of the rubber bush mounting column 34. By being screwed into the plate member 30, the plate member 30 is fixed. A speaker assembly 20 having a speaker unit 21 fixed on a plate member 30 is a speaker assembly 20, and the speaker assembly 20 viewed from the speaker unit 21 side is shown in FIG. FIG. 4D shows the speaker assembly 20 shown in FIG. 4C viewed from the sound output side.

  FIG. 5 shows a process of assembling the speaker assembly 20 shown in FIG. 4 (c) to the lower housing 2 shown in FIG. 3, and the lower housing 2 is shown in FIG. 2 (a). As described above, the circuit board 11, the reinforcing frame 12, and the reinforcing sheet metal 13 are attached. The speaker assembly 20 is placed on the upper end portion 6T of the duct 6 in a state in which the positioning hole 35 provided in the second projecting piece 32 is fitted into the positioning projection 15 provided in the reinforcing frame 12 and positioned. Is done. In this state, the first projecting piece 31 is fastened to the screw hole 19 provided in the reinforcing sheet metal 13 with the screw 26, and the second projecting piece 32 is fastened to the boss 7 with the screw 26 via the reinforcing frame 12. .

  FIG. 6 illustrates a state in which the speaker assembly 20 shown in FIG. 5 is placed on the upper end portion 6T of the duct 6 of the lower housing 2 and fastened to the boss 7 with screws 26. In a state where the positioning hole 35 of the second projecting piece 32 is fitted into the positioning projection 15 in the reinforcing frame 12 and the plate member 30 is placed on the upper end portion 6T of the duct 6, the second projecting piece 32 and A gap S is formed between the top surface of the boss 7 (in this embodiment, the reinforcing frame 12).

  That is, in the present embodiment, the second member is formed so that the gap S is opened between the second projecting piece 32 and the reinforcing frame 12 in a state where the plate member 30 is placed on the upper end portion 6T of the duct 6. The protruding piece 32 is provided with respect to the plate member 30. The second projecting piece 32 is formed of an elastic member having a spring property. The second projecting piece 32 can be formed as a separate member having a spring property with respect to the plate member 30 and fixed to the outer peripheral portion of the plate member 30. On the other hand, in the present embodiment, the second projecting piece 32 is formed integrally with the plate member 30 with a sheet metal. In the case where the second projecting piece 32 is integrally formed with the plate member 30 with a sheet metal, the plate member 30 may be formed with the same elastic member.

  Then, when the second projecting piece 32 is fastened to the top surface of the boss 7 (in this embodiment, the top surface of the boss 7 via the reinforcing frame 12) with the screw 26 to eliminate the gap S, the second projecting piece 32 The plate member 30 is pressed against the upper end portion 6T of the duct 6 by the spring force of 32. The actual size of the gap S is about 0.1 mm to 0.2 mm. As a result, the plate member 30 is pressed and firmly adhered to the upper end portion 6T of the duct 6, and the sound output from the speaker unit 21 does not leak from the upper end portion 6T of the duct 6 into the lower housing 2. . Therefore, in the electronic apparatus according to the present embodiment, a cushion material for preventing sound leakage is not required between the plate member 30 and the upper end portion 6T of the duct 6, and the cost can be reduced.

  FIG. 7A shows the appearance of an electronic apparatus 10A according to another embodiment incorporating the speaker of the present application. The electronic apparatus 10A of the present embodiment is a notebook personal computer, and the display 3 can be opened and closed by a hinge mechanism with respect to a main body 14 provided with an upper housing 1 and a lower housing 2. A keyboard 1 </ b> K is provided on the upper surface of the upper housing 1, and sound emitting units 4 that output sound of a built-in speaker are provided on both side surfaces of the main body unit 14. The sound emitting unit 4 is provided with a slit 5, and this slit 5 is also provided on the bottom surface side of the lower housing 2 as shown in FIG.

  FIG. 8A shows the speaker assembly 20A of the first example mounted on the sound emitting section 4 of the lower housing 2 in the electronic apparatus 10A of the other embodiment shown in FIGS. 7A and 7B. It shows the state to be placed. In the lower housing 2 of the first embodiment, the side surface 2S is formed perpendicular to the bottom surface 2B, and the sound emitting section 4 is provided at the portion where the bottom surface 2B and the side surface 2S intersect. The bottom surface 2B and the side surface 2S of the sound emitting unit 4 are provided with a plurality of slits 5 that communicate the inside and outside of the lower housing 2 continuously from the bottom surface 2B toward the side surface 2S. Further, a duct 6 surrounding the slit 5 protrudes from the sound emitting part 4 of the lower housing 2. In the present embodiment, the duct 6 has a rectangular shape, and the upper end portion 6T of the duct 6 is parallel to the bottom surface 2B. A boss 7 projects from the bottom surface 2 </ b> B outside the duct 6.

  The speaker assembly 20 </ b> A includes a flat plate member 30 made of sheet metal, a speaker unit 21, and screws 26. In the speaker assembly 20A according to the present embodiment, the structure of the speaker unit 21 attached to the plate member 30 made of sheet metal may be the same as that of the above-described embodiment. Therefore, in this embodiment, the speaker unit 21 includes a rubber bush, a washer, and a screw. The illustration is omitted. Similarly, illustration of a rubber bush mounting column for attaching a rubber bush to the plate member 30 is omitted. The speaker unit 21 is attached to the position indicated by the two-dot chain line of the plate member 30.

  The plate member 30 has a hole 37 in the central portion, and only a protruding piece 32 (the second protruding piece 32 in the previous embodiment, hereinafter simply referred to as the protruding piece 32) on the opposite side of the outer peripheral portion. Is provided. The protruding piece 32 includes a base portion 32B on the same surface as the plate member 30, and a tongue piece portion 32T protruding in a tongue-like shape from the base portion 32B. The tongue piece 32T is bent obliquely upward from the base 32B and then bent parallel to the base 32B. A mounting hole 33 is provided in a portion parallel to the base portion 32B of the tongue piece portion 32T.

  The speaker assembly 20 </ b> A is placed on the upper end 6 </ b> T of the duct 6 with the mounting hole 33 provided in the protruding piece 32 aligned with the screw hole 17 on the top surface of the boss 7. In this state, the protruding piece 32 is fastened to the boss 7 with the screw 26 inserted through the mounting hole 33.

  FIG. 8B illustrates a state in which the speaker assembly 20 </ b> A shown in FIG. 8A is placed on the upper end portion 6 </ b> T of the duct 6 of the lower housing 2 and fastened with screws 26. In a state where the plate member 30 is placed on the upper end portion 6T of the duct 6, there is a gap S between the tongue piece portion 32T of the protruding piece 32 and the top surface of the boss 7. Also in the present embodiment, a gap S is formed between the tongue piece portion 32T of the protruding piece 32 and the top surface of the boss 7 in a state where the plate member 30 is placed on the upper end portion 6T of the duct 6. Further, the protruding piece 32 is provided for the plate member 30. Further, the protruding piece 32 is formed of an elastic member having a spring property, and can be formed on a separate member having a spring property with respect to the plate member 30 and fixed to the outer peripheral portion of the plate member 30. is there. On the other hand, in the present embodiment, the protruding piece 32 is formed by integrally molding the plate member 30 with a sheet metal. When the projecting piece 32 is formed by integrally molding the plate member 30 with the sheet metal, the plate member 30 may be formed of the same elastic member.

  When the protruding piece 32 is fastened to the top surface of the boss 7 with the screw 26 and the gap S is eliminated, the plate member 30 is pressed against the upper end portion 6T of the duct 6 by the spring force of the protruding piece 32. As a result, the plate member 30 is firmly adhered to the upper end portion 6T of the duct 6, and the sound output from the speaker unit 21 does not leak from the upper end portion 6T of the duct 6 into the lower housing 2. Therefore, even in the electronic apparatus of the present embodiment, a cushion material for preventing sound leakage is not required between the plate member 30 and the upper end portion 6T of the duct 6, and the cost can be reduced.

  In FIG. 9, the speaker assembly 20 </ b> B of the second example is placed on the sound emitting unit 4 of the lower housing 2 in the electronic device 10 </ b> A of the other embodiment shown in FIGS. 7A and 7B. This indicates the state. The difference of the speaker assembly 20B of the second embodiment from the speaker assembly 20A of the first embodiment is the number of protruding pieces 32 provided on the plate member 30. In the speaker assembly 20A of the first embodiment, the protruding pieces 32 are provided at two opposite sides of the outer peripheral portion of the plate member 30. However, in the speaker assembly 20B of the second embodiment, the protruding pieces 32 are the plate. It is provided on three sides of the outer peripheral portion of the member 30. The structure of the protruding piece 32 is the same.

  Accordingly, the lower housing 2 to which the speaker assembly 20B of the second embodiment is attached has three protruding pieces on the bottom surface 2B outside the duct 6 surrounding the slit 5 in the sound emitting portion 4 of the lower housing 2. Three bosses 7 corresponding to 32 are projected. Thus, the speaker assembly 20B of the second embodiment is different from the speaker assembly 20A of the first embodiment only in the number of protruding pieces 32 provided on the plate member 30, and the other structures and effects are the same. Therefore, further explanation is omitted.

  FIG. 10A shows a modification of the plate member 30 shown in FIG. In the plate member 30 shown in FIG. 8A, the two protruding pieces 32 are bent in parallel to the base portion 32B after being bent obliquely upward from the base portion 32B and the base portion 32B on the same surface as the plate member 30. The tongue portion 32T was provided. On the other hand, in the modification shown in FIG. 10A, two protruding pieces 32 have a base portion 32 </ b> B on the same surface as the plate member 30 and a tongue piece protruding from the base portion 32 </ b> B but formed on the same surface as the plate member 30. A portion 32T is provided.

  FIG. 10B shows a modification of the plate member 30 shown in FIG. In the plate member 30 shown in FIG. 9, the three protruding pieces 32 are a base portion 32B on the same surface as the plate member 30, and a tongue that is bent obliquely upward from the base portion 32B and then bent parallel to the base portion 32B. One piece 32T was provided. On the other hand, in the modification shown in FIG. 10B, the three protruding pieces 32 have a base portion 32 </ b> B that is on the same surface as the plate member 30 and a tongue piece that protrudes from the base portion 32 </ b> B but is formed on the same surface as the plate member 30. A portion 32T is provided.

  When the base 32B and the tongue piece 32T of the protruding piece 32 are on the same surface as the plate member 30 as in the modification of the plate member 30 shown in FIGS. The height from the bottom surface 2B of the top surface of the boss 7 protruding from the body 2 is made lower than the height from the bottom surface 2B of the upper end portion 6T of the duct 6. This will be described with reference to FIGS. 10C and 10B for the case of the plate member 30 in the speaker assembly 20A of the second embodiment. FIG. 10C shows a case where the base portion 32 </ b> B and the tongue piece portion 32 </ b> T of the protruding piece 32 are formed on the same surface as the plate member 30. In this case, in a state where the speaker assembly 20 </ b> A is placed on the upper end portion 6 </ b> T of the duct 6 of the lower housing 2, the boss 7 is formed so that a gap S is formed between the protruding piece 32 and the top surface of the boss 7. The height of the top surface from the bottom surface 2B is made lower than the height from the bottom surface 2B of the upper end portion 6T of the duct 6.

  In the above configuration, when the protruding piece 32 is fastened to the top surface of the boss 7 with the screw 26 to eliminate the gap S, the tongue piece portion 32T of the protruding piece 32 bends downward as shown in FIG. The plate member 30 is pressed against the upper end 6T of the duct 6 by the spring force. As a result, the plate member 30 is firmly adhered to the upper end portion 6T of the duct 6, and the sound output from the speaker unit 21 does not leak from the upper end portion 6T of the duct 6 into the lower housing 2. Therefore, even in the electronic apparatus of the present embodiment, a cushion material for preventing sound leakage is not required between the plate member 30 and the upper end portion 6T of the duct 6, and the cost can be reduced. The projecting piece 32 or the plate member 30 including the projecting piece 32 is formed of an elastic member having a spring property as in the above-described embodiment.

  The present application has been described in detail with particular reference to preferred embodiments thereof. For easy understanding of the present application, specific forms of the present application are appended below.

(Appendix 1) An electronic device including a speaker in a housing,
A duct that prevents the sound waves from leaking into the housing is formed in the sound emitting unit that emits sound waves output from the speaker of the housing to the outside.
The speaker is attached to a plate member that matches the shape of the upper end of the duct,
Protruding pieces for fixing the plate member to the housing are provided in at least two places on the outer periphery of the plate member,
Inside the housing, a protrusion having a mounting portion corresponding to the protruding piece on the top surface is provided,
In a state where the plate member is placed on the upper end portion of the duct with the protruding piece and the protruding portion aligned, a gap is opened between the protruding piece and the top surface of the protruding portion. The protruding piece and the protruding portion are formed, and the plate member is pressed against the upper end portion of the duct when the protruding piece is fixed to the protruding portion to eliminate the gap.
(Additional remark 2) The said protrusion piece is an electronic device of Additional remark 1 currently formed with the elastic member provided with the spring property.
(Additional remark 3) The said board member in which the said protrusion piece was provided is an electronic device of Additional remark 1 or 2 currently integrally formed with the sheet metal.
(Supplementary Note 4) An attachment hole is provided in the protruding piece, and an attachment hole corresponding to the attachment hole is provided on the top surface of the attaching part of the protruding portion, and the protruding piece and the protruding portion are provided with screws. 4. The electronic device according to any one of appendices 1 to 3, which is fixed.
(Supplementary note 5) The electronic device according to supplementary note 4, wherein the portion having the mounting hole of the protruding piece and the plate member are formed on different planes.

(Additional remark 6) The part with the said attachment hole of the said protrusion piece, and the said board member are the electronic devices of Additional remark 4 currently formed on the same plane.
(Supplementary note 7) The sound emitting part of the casing surrounded by the duct includes a side wall and a bottom surface of the casing, and a plurality of slits for emitting sound are formed on the side wall and the bottom surface. 7. The electronic device according to any one of appendices 1 to 6.
(Additional remark 8) The said speaker is an electronic device in any one of Additional remark 1 to 7 accommodated in the box provided with the opening part in the output part side of a sound wave.
(Additional remark 9) The said box is an electronic device of Additional remark 8 attached to the said board member via a buffer member.

2 Lower housing 3 Display 4 Sound emitting part 5 Slit 6 Duct 6T Upper end 7 Boss 10, 10A Electronic device 20, 20A, 20B Speaker assembly 21 Speaker unit 22 Mounting leg 24 Rubber bush 30 Plate member (sheet metal)
31, 32 Projection piece 32B Base part 32T Tongue piece part 33, 39 Mounting hole

Claims (5)

An electronic device including a speaker in a housing,
A duct that prevents the sound waves from leaking into the housing is formed in the sound emitting unit that emits sound waves output from the speaker of the housing to the outside.
The speaker is attached to a plate member that matches the shape of the upper end of the duct,
Protruding pieces for fixing the plate member to the housing are provided in at least two places on the outer periphery of the plate member,
Inside the housing, a protrusion having a mounting portion corresponding to the protruding piece on the top surface is provided,
In a state where the plate member is placed on the upper end portion of the duct with the protruding piece and the protruding portion aligned, a gap is opened between the protruding piece and the top surface of the protruding portion. The protruding piece and the protruding portion are formed, and the plate member is pressed against the upper end portion of the duct when the protruding piece is fixed to the protruding portion to eliminate the gap.   The electronic device according to claim 1, wherein the protruding piece is formed of an elastic member having a spring property.   The electronic device according to claim 1, wherein the plate member provided with the protruding piece is integrally formed of a sheet metal.   The sound emission part of the housing surrounded by the duct includes a side wall and a bottom surface of the housing, and a plurality of slits for emitting sound are formed on the side wall and the bottom surface. Item 4. The electronic device according to any one of Items 1 to 3.   The electronic device according to any one of claims 1 to 4, wherein the speaker is housed in a box having an opening on a sound wave output portion side.

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