JP4271216B2 - Portable speaker system - Google Patents

Description

  The present invention relates to a portable speaker system that is carried and carried by a user and connected to a personal computer, a disk player, or the like.

  Conventionally, when reproducing sound using a portable personal computer, a disk player, or the like, a portable speaker system that is connected to these and converts an audio signal into sound may be used. In the portable speaker system, a device for improving the handleability of carrying around is required as compared with a speaker system that does not require normal portability.

  In a portable speaker system, the front panel or net provided on the front of the speaker is made of a resin or metal member to prevent the speaker's diaphragm from colliding with a foreign object and being destroyed when carrying the speaker. Composed. In addition, for example, there is a conventional portable speaker system that improves the handleability of carrying around by combining left and right speaker boxes (Patent Document 1).

  On the other hand, since a portable speaker system has a small cabinet for ensuring portability, a sufficient sound capacity may not be obtained and a low-frequency reproduction capability may be insufficient. Conventionally, there has been a technique for improving the low frequency reproduction characteristic of a bass reflex type speaker system with a limited capacity by providing means for increasing the capacity and the opening area of the duct when necessary. (Patent Document 2).

Japanese Utility Model Publication No. 7-2992 Japanese Utility Model Publication No. 1-57877

  However, even in the case of a portable speaker system, it is necessary to ensure good low frequency reproduction characteristics with a small cabinet that is easy to carry for good sound reproduction. At the same time, the portable speaker system must protect the diaphragm of the speaker that is easily destroyed when being carried, while it is preferable to improve the handleability of carrying.

  The present invention has been made in order to solve the above-described problems of the prior art, and an object of the present invention is a portable speaker system, which has excellent handling characteristics when being carried and is easy to carry. An object of the present invention is to provide a portable speaker system that can ensure good low-frequency reproduction characteristics even in a small cabinet.

  A portable speaker system according to the present invention is a speaker system including a speaker, a cabinet to which the speaker is attached, and a lid member that protects the speaker, wherein the cabinet has a first baffle to which the speaker is attached, and a first baffle. A second baffle provided separately from the baffle, and at least a first cavity defined by the first baffle and the second baffle, wherein the first baffle has a first connecting portion that removably connects the lid member. The second baffle includes a second connecting portion that connects the lid member removed from the first baffle and a first duct that communicates with the first cavity, and is connected to the second connecting portion during operation. The lid member defines a second cavity that communicates with the first duct together with the second baffle, and includes a second duct that communicates with the second cavity.

  Preferably, the speaker system according to the present invention further includes a first half pipe portion that constitutes the second duct together with the second baffle when the lid member is connected to the second connecting portion.

  Preferably, in the speaker system of the present invention, the second baffle of the cabinet further includes a second half pipe portion that constitutes a second duct corresponding to the first half pipe portion of the lid member.

  Further preferably, in the speaker system of the present invention, the lid member further includes an accommodation wall portion that defines an accommodation space that is blocked from the second cavity, and an accommodation lid that defines the accommodation space together with the accommodation wall portion.

  Preferably, in the speaker system of the present invention, the lid member further includes a connection cord that is accommodated in the accommodation space, the cabinet is provided with a connector that is connected to the speaker by an internal wiring, and the lid member is second-linked. At the time of operation connected to the unit, the connection cord taken out from the accommodation space is connected to the connector.

  Preferably, in the speaker system of the present invention, the speaker includes at least a left speaker to which a left stereo signal is input and a right speaker to which a right stereo signal is input, and the left speaker diaphragm and the right speaker diaphragm Separates the front side space of the first baffle and the first cavity of the cabinet.

  The operation of the present invention will be described below.

  The portable speaker system of the present invention includes a speaker, a cabinet to which the speaker is attached, and a lid member that protects the speaker when being carried. The cabinet includes a first baffle to which a speaker is attached, a second baffle provided separately from the first baffle, and a first cavity defined by the first baffle and the second baffle. The first baffle includes a first connecting portion that removably connects the lid member, and the second baffle is connected to the first cavity and the second connecting portion that connects the lid member removed from the first baffle. A first duct communicating with the first duct.

  In other words, in the speaker system of the present invention, the lid member is connected to the first connecting portion provided on the first baffle of the cabinet when carrying, and protects the diaphragm of the speaker that is easily destroyed when carrying. And a lid member connects with the 2nd connection part provided in the 2nd baffle of the cabinet at the time of operation, and constitutes a double bass reflex type cabinet. That is, the first cavity of the cabinet, the first duct included in the second baffle, the second cavity defined by the lid member together with the second baffle, and the second duct provided in the lid member communicate with each other, and the cavity The double bass-reflex cabinet in which the acoustic capacity in and the acoustic mass in the duct resonate is configured.

  As a result, the portable speaker system of the present invention ensures good low-frequency reproduction characteristics by the double bass reflex cabinet formed by the lid member during the operation of reproducing sound even in a small cabinet with excellent portability. can do. And when carrying without sound reproduction, the diaphragm of the speaker where the lid member is easily destroyed is surely protected. Therefore, a portable speaker system having excellent handling characteristics when being carried and having good low frequency reproduction characteristics is realized. In addition, it may include only a speaker corresponding to one audio channel signal, and is a stereo integrated portable speaker system including a left speaker and a right speaker to which left and right audio signals are respectively input. Also good.

  This portable speaker system includes a lid member having the second duct as described above, and the first baffle and the second baffle have a first coupling part and a second coupling part, respectively, to which the lid member is coupled. is doing. Specifically, the 2nd duct of a lid member may be provided with the 1st half pipe part which constitutes the 2nd duct with the 2nd baffle of a cabinet at the time of operation in which a lid member is connected with the 2nd connection part. . Moreover, the 2nd baffle of the cabinet may be provided with the 2nd half pipe part which comprises a 2nd duct corresponding to the 1st half pipe part of a cover member. In the case where the cabinet and the lid member are molded from resin, the second duct can be configured by connecting the cabinet and the lid member, so that the parts and the like constituting the duct can be reduced.

  Further, in the case where the lid member further includes an accommodation wall portion that defines the accommodation space blocked from the second cavity, and an accommodation lid that defines the accommodation space together with the accommodation wall portion, the interior of the accommodation space In addition, a connection cord used to connect an audio signal to be supplied to the portable speaker system can be accommodated. The cabinet has a connector for connecting to the speaker by internal wiring, and the connection cord is taken out of the housing space and connected to the connector when the lid member is connected to the second connecting portion, and the speaker is connected to the audio. Played. This portable speaker system can store the connection cord in the storage space provided inside the lid member, ensuring good low-frequency reproduction characteristics and excellent handling characteristics when carrying. Less likely to lose the code.

  The speaker system of the present invention can ensure good low-frequency reproduction characteristics even in a small cabinet that is excellent in portability when carried and is easy to carry. In addition, it is possible to reduce the parts constituting the double bass reflex cabinet. Further, the connection cord can be accommodated in the lid member, and the connection cord is not lost.

  The speaker system of the present invention has an excellent handling property when being carried, and is intended to ensure good low frequency reproduction characteristics even in a small cabinet that is easy to carry. 1 baffle, a second baffle provided separately from the first baffle, and a first cavity defined by at least the first baffle and the second baffle, wherein the first baffle removably connects the lid member. The first baffle has a first baffle, and the second baffle has a second baffle for connecting the lid member removed from the first baffle, and a first duct communicating with the first cavity. The lid member connected to the connecting portion defines a second cavity communicating with the first duct together with the second baffle, and includes a second duct communicating with the second cavity. More, was realized.

  Hereinafter, although the speaker system by preferable embodiment of this invention is demonstrated, this invention is not limited to these embodiment.

  1 and 2 are diagrams illustrating a portable speaker system 1 according to a preferred embodiment of the present invention. FIG. 1 shows a mode when carrying the portable speaker system 1 while carrying, while FIG. 2 shows a mode when the portable speaker system 1 reproduces sound. FIG. 1A is a perspective view illustrating a portable speaker system 1 when being carried, and FIG. 1B is a side cross-sectional view illustrating an internal structure thereof. 2A is a perspective view illustrating the portable speaker system 1 during operation, and FIG. 2B is a side cross-sectional view illustrating the internal structure thereof. Other internal structures that are not necessary for the description are omitted.

  In the portable speaker system 1 of the present embodiment, a speaker 2 that converts an audio signal into audio is attached to a cabinet 3. The cabinet 3 defines the first cavity 30 by separating the front and rear spaces of the diaphragm 21 of the speaker 2 so that sound waves radiated in opposite phases before and after the diaphragm of the speaker 2 do not interfere with each other. Ensure reproduction characteristics. In addition, the cabinet 3 includes a duct 4 and constitutes a bass reflex cabinet that improves the reproduction characteristics in the low frequency range by resonating the acoustic capacity of the cavity 30 and the acoustic mass of the duct 4. Specifically, the speaker 2 is attached to the front baffle 31 of the cabinet, the duct 4 is attached to the rear baffle 32, and the front baffle 31 and the rear baffle 32 are a top plate 33, a bottom plate 34, a left side plate 35, and a right side plate. As a result, a substantially rectangular parallelepiped cabinet 3 is configured.

  The cabinet 3 is formed from a resin molded product having no air permeability, a wood plate including a resin plywood, or a metal plate. In addition, an audio signal input to the speaker 2 during the operation of the portable speaker system 1 is supplied via a connection line 22 connected to the speaker 2 and a terminal 23 to which the connection line 22 is connected. The terminal 23 is provided on the left side plate 35. During operation of the portable speaker system 1, an audio signal output from a portable personal computer (not shown), a disc player, or the like is amplified by an amplifier (not shown) and input to the terminal 23. Of course, the portable speaker system 1 may have an amplifier.

  The portable speaker system 1 of this embodiment includes a lid member 5 that protects the diaphragm 21 of the speaker 2 attached to the front baffle 31 of the cabinet 3 when being carried. The lid member 5 includes a substantially rectangular front protection plate 51, a top surface protection plate 53, a bottom surface protection plate 54, a left side protection plate 55, and a right side protection plate 56 that are provided substantially in parallel with the front baffle 31 of the cabinet 3. And a substantially rectangular parallelepiped member in which one surface to be opposed to the front baffle 31 of the cabinet 3 is omitted, and an internal space 50 is defined therein. That is, when the lid member 5 is attached to the front baffle 31 of the cabinet 3 to which the speaker 2 is attached, the lid member 5 accommodates the speaker 2 in the internal space 50 thereof. Further, a duct 6 described later is attached to the top surface protection plate 53 of the lid member 5.

  Specifically, the front baffle 31 of the cabinet 3 is formed with a concave portion 31a having a step that is lowered by a certain width over the entire circumference, while the lid member 5 has its top surface protection plate 53. And the convex part 52 which fits into the recessed part 31a is formed over the perimeter of the opening comprised from the bottom face protective plate 54, the left side face protective plate 55, and the right side face protective plate 56. Therefore, when the user of the portable speaker system 1 attaches the lid member 5 to the front baffle 31 of the cabinet 3 by fitting the concave portion 31a and the convex portion 52 during carrying as described above, the diaphragm 21 of the speaker 2 becomes a foreign object. It is possible to protect the speaker 2 by preventing it from colliding with and breaking. Similarly to the cabinet 3, the lid member 5 is also formed from a resin molded product having no air permeability, a wood plate including a resin plywood, or a metal plate.

  On the other hand, in the portable speaker system 1 of the present embodiment, the lid member 5 that protects the speaker 2 is attached to the rear baffle 32 of the cabinet 3 during the operation of reproducing sound. Specifically, the rear baffle 32 of the cabinet 3 is formed with a concave portion 32a having a step that is lowered by a certain width over the entire circumference, similarly to the front baffle 31. Therefore, the recess 32a is formed over the entire circumference of the opening formed by the top surface protection plate 53, the bottom surface protection plate 54, the left side surface protection plate 55, and the right side surface protection plate 56 of the lid member 5. The protrusion 52 is fitted. When the concave portion 32 a of the cabinet 3 and the convex portion 52 of the lid member 5 are fitted, the lid member 5 forms a second cavity 50 together with the rear baffle 32 of the cabinet 3.

  Here, the duct 4 is attached to the rear baffle 32 of the cabinet 3, and the duct 6 is attached to the top surface protection plate 53 of the lid member 5. The duct 4 is a cylindrical body having an opening 41 disposed in the first cavity 30 and an opening 42 disposed in the rear baffle 32, and the duct 6 is an opening disposed in the second cavity 50. 61 and a cylindrical body having an opening 62 disposed in the top surface protection plate 53. Therefore, the first cavity 30 of the cabinet 3, the duct 4 included in the rear baffle 32, the second cavity 50 defined by the lid member 5 together with the rear baffle 32, and the duct 6 included in the lid member 5 communicate with each other. To construct a double bass reflex cabinet. As a result, in the portable speaker system 1 of the present embodiment, the user connects the lid member 5 to the connecting portion provided on the rear baffle 32 of the cabinet 3 during the sound reproduction operation, so that the acoustic capacity in each cavity and each By configuring a double bass reflex cabinet in which the acoustic mass in the duct resonates, good low-frequency reproduction characteristics can be ensured.

  The volume of the first cavity 30 and the second cavity 50 and the opening area and the length of the duct 4 and the duct 6 have good low frequency reproduction characteristics during sound reproduction operation from parameters such as the lowest resonance frequency f0 of the speaker 2. Each is properly designed to ensure. In this case, since the volume of the second cavity 50 is not significantly smaller than the volume of the first cavity 30, the depth of the lid member 5 attached to the front baffle 31 of the cabinet 3 when carrying is determined by the speaker. The depth is sufficient to protect the second diaphragm 21. Therefore, in the portable speaker system 1, it is possible to achieve both handling characteristics when carrying and good low frequency reproduction characteristics.

  In this embodiment, when attaching the lid member 5 to the cabinet 3, the concave portion 31a of the front baffle 31 and the convex portion 52 of the lid member 5 are fitted together, and when the second cavity 50 is formed, Although the recessed part 32a of the rear surface baffle 32 and the convex part 52 of the cover member 5 were fitted, the structure of each connection part is not restricted to a present Example. A structure that fits with the opening of the lid member 5 may be provided in common for the front baffle 31 and the rear baffle 32 of the cabinet 3. For example, in this embodiment, the lid member 5 is fitted to the front baffle 31 and the rear baffle 32. Of the baffles constituting the first cavity, the lid member 5 is attached to the baffle to which a speaker is attached. And, on the other hand, another baffle that also forms the first cavity and has a duct attached thereto may have a fitting structure with the lid member 5. . Further, the fitting structure between the cabinet and the lid member may be a structure in which an elastic body such as rubber or elastomer resin or a sponge-like sealing seal material is sandwiched in order to keep the fitting portion sealed. Good.

  3 and 4 are diagrams illustrating a portable speaker system 10 according to another preferred embodiment of the present invention. FIG. 3 shows a mode when the portable speaker system 10 is carried, and FIG. 4 shows a mode when the portable speaker system 10 reproduces sound. 3A is a front view for explaining the portable speaker system 10 when carried, FIG. 3B is a top sectional view for explaining the internal structure, and FIG. 3C is a side view. FIG. 4A is a front view for explaining the portable speaker system 10 during operation, FIG. 3B is a top sectional view for explaining the internal structure, and FIG. FIG. Other internal structures that are not necessary for the description are omitted, and connection lines, terminals, and the like in the portable speaker system 10 are also omitted. Also, common numbers are assigned to parts common to the portable speaker system 1 of the first embodiment, and description and illustration are omitted.

  A portable speaker system 10 of this embodiment is a small stereo speaker system that reproduces stereo sound, with a speaker 2L corresponding to a left stereo signal and a speaker 2R corresponding to a right stereo signal attached to a cabinet 3. . The speakers 2L and 2R are attached to concave horns provided on the front baffle 31 of the cabinet 3, respectively. The cabinet 3 defines the first cavity 30 by separating the front and rear spaces of the diaphragms of the speakers 2L and 2R so that sound waves radiated in opposite phases before and after the diaphragm of the speakers 2 do not interfere with each other. To ensure the reproduction characteristics. That is, in the portable speaker system 10, the speakers 2L and 2R are attached to the single cabinet 3 so that stereo sound can be reproduced. Therefore, compared with a case where a cabinet corresponding to each of the left and right stereo signals is provided. Excellent handling for carrying around.

  The cabinet 3 includes a duct 4 and constitutes a bass reflex cabinet that improves the reproduction characteristics in the low frequency range by resonating the acoustic capacity of the cavity 30 and the acoustic mass of the duct 4. Specifically, the speakers 2L and 2R are attached to the front baffle 31 of the cabinet, the duct 4 is attached to the rear baffle 32, and the front baffle 31 and the rear baffle 32 are formed by a top plate, a bottom plate, a left side plate, and a right side plate. As a result, the cabinet 3 having a substantially rectangular parallelepiped shape is configured.

  The portable speaker system 10 of this embodiment includes a lid member 5 that protects the diaphragms of the speakers 2L and 2R attached to the front baffle 31 of the cabinet 3 when being carried. The lid member 5 includes a substantially rectangular front protective plate 51 provided substantially in parallel with the front baffle 31 of the cabinet 3, a top protective plate, a bottom protective plate, a left side protective plate 55 and a right side protective plate 56. It is a substantially rectangular parallelepiped member that is configured and has one surface that should face the front baffle 31 of the cabinet 3 omitted. The front baffle 31 of the cabinet 3 is formed with a recessed portion 31a that is lowered by one step over its entire circumference, while the lid member 5 has its top surface protection plate, bottom surface protection plate, and left side surface protection plate 55. And the convex part 52 fitted to the recessed part 31a is formed over the perimeter of the opening comprised from the right side surface protection board 56. FIG. As a result, when the user attaches the lid member 5 to the front baffle 31 of the cabinet 3 to which the speakers 2L and 2R are attached, the lid member 5 protects the front surfaces of the speakers 2L and 2R. Half pipes 63 </ b> L and 63 </ b> R are formed on the left side protection plate 55 and the right side protection plate 56, respectively, and communicate with the internal space 50 of the lid member 5.

  On the other hand, in the portable speaker system 10, the lid member 5 is attached to the rear baffle 32 of the cabinet 3 during an operation of reproducing sound. Specifically, the rear baffle 32 of the cabinet 3 is formed with a recessed portion 32a that is lowered by one step over the entire circumference thereof, similarly to the front baffle 31. Accordingly, the concave portion 32a is a convex portion formed over the entire circumference of the opening formed by the top surface protection plate, the bottom surface protection plate, the left side surface protection plate 55, and the right side surface protection plate 56 of the lid member 5. 52. When the concave portion 32 a of the cabinet 3 and the convex portion 52 of the lid member 5 are fitted, the lid member 5 forms a second cavity 50 together with the rear baffle 32 of the cabinet 3.

  Further, the rear baffle 32 of the cabinet 3 is a half that forms a substantially cylindrical duct corresponding to the half pipes 63L and 63R formed on the left side protection plate 55 and the right side protection plate 56 of the lid member 5. The pipes 64L and 64R are formed by providing recesses in the rear baffle 32. That is, when the lid member 5 is attached to the rear baffle 32 of the cabinet 3, the second cavity 50 can be formed, and at the same time, the ducts 6L and 6R communicating from the second cavity 50 to the outside of the cabinet can be formed. Accordingly, the first cavity 30 of the cabinet 3, the duct 4 included in the rear surface baffle 32, the second cavity 50 defined by the lid member 5 together with the rear surface baffle 32, and the duct formed by the half pipes of the lid member 5 and the rear surface baffle 32. 6L and 6R communicate with each other to form a double bass reflex cabinet. As a result, the portable speaker system 10 can ensure good low-frequency reproduction characteristics by configuring a double bass reflex cabinet during operation.

  5 and 6 are diagrams illustrating a portable speaker system 11 according to another preferred embodiment of the present invention. FIG. 5 shows a mode when the portable speaker system 11 is carried, while FIG. 6 shows a mode when the portable speaker system 11 reproduces sound. Fig.5 (a) is a perspective view explaining the portable speaker system 1 at the time of carrying, FIG.5 (b) is side sectional drawing explaining the internal structure. FIG. 6 is a perspective view for explaining the portable speaker system 11 during operation, and FIG. 7 is a perspective view for explaining the lid member 5 constituting the portable speaker system 11. In addition, other internal structures that are not necessary for the description are omitted, and connection lines in the portable speaker system 11 are also omitted. In addition, portions common to the portable speaker system 1 or 10 of the above embodiment are denoted by common numbers, and description and illustration are omitted.

  The portable speaker system 11 of the present embodiment is a small stereo speaker system that reproduces stereo sound, with a speaker 2L corresponding to the left stereo signal and a speaker 2R corresponding to the right stereo signal attached to the cabinet 3. . The basic configuration of the portable speaker system 11 is common to the portable speaker system 10 of the second embodiment, and includes a lid member 5 that protects the speakers 2L and 2R attached to the cabinet 3 when being carried. On the other hand, during the operation of reproducing sound, the lid member 5 is attached to the rear baffle 32 of the cabinet 3 to constitute a double bass reflex cabinet. The duct 4 is attached to the rear surface baffle 32 of the cabinet 3, and the lid member 5 and the half pipe of the rear surface baffle 32 form ducts 6L and 6R.

  In this portable speaker system 11, the speakers 2 </ b> L and 2 </ b> R are respectively attached to a concave horn provided on the front baffle 31 of the cabinet 3. When the portable speaker system 11 is installed on a parallel surface such as a desk with the rear baffle 32 on the bottom side, the front baffle 31 is formed so that the radiation direction of the reproduced sound wave is obliquely upward. It is attached to the cabinet cylinder 37. Note that the cabinet 3 and the lid member 5 are formed by assembling molded parts formed of a resin having no air permeability.

  Since the portable speaker system 11 has the speakers 2L and 2R attached to the cabinet 3 having such a shape, the portable speaker system 11 has excellent handling characteristics when being carried, has a good low-frequency reproduction characteristic, and is user-friendly. Since the reproduction sound wave is emitted in the direction of the head, it is particularly suitable when used by connecting to a personal computer. The portable speaker system 11 has an amplifier (not shown) inside, and a stereo audio signal is supplied from the connection cord 7 to the stereo input terminal 24 arranged on the side surface of the cabinet cylinder 37. That is, the connection cord 7 connects the stereo audio output terminal of the personal computer (not shown) and the stereo input terminal 24. Power for the amplifier is supplied by connecting an AC adapter (not shown) to the connector 25. Further, the volume of the amplifier is adjusted by the user using the volume 26 that also serves as a power switch.

  The lid member 5 of the portable speaker system 11 includes a front protective member 57 in which a convex portion 52 that fits into the cabinet 3 is integrally formed, and an accommodating lid 58 that is attached to the front protective member 57. The front surface protection member 57 of the lid member 5 forms an internal space 50 when mated with the front surface baffle 31 of the cabinet 3, and forms a second cavity 50 when mated with the rear surface baffle 32 of the cabinet 3. On the other hand, the cover member 5 has a storage wall portion that defines a storage space 59 cut off from the internal space 50 or the second cavity 50 together with the storage lid 58. That is, the lid member 5 protects the speaker when carrying by the partition called the housing wall portion of the front protection member 57 and is necessary for using the space 50 that forms a double bass reflex cabinet during operation and the portable speaker system 11. It is partitioned into an accommodation space 59 for accommodating the connection cord 7. In the side cross-sectional view of FIG. 5 (b) showing the mode when carrying the portable speaker system 11 and the perspective view of FIG. 7, the connection cord 7 is accommodated in the accommodation space 59 of the lid member 5. The state of being is shown.

  The connection cord 7 accommodated in the lid member 5 when being carried is used by a user who wants to operate the portable speaker system 11 to remove the lid member 5 from the front baffle 31 of the cabinet 3 and to the rear baffle 32 of the cabinet 3. At the time of attachment, it is possible to connect to the stereo input terminal 24 provided on the side surface of the cabinet 3 by removing the storage lid 58 and taking it out from the storage space 59. Further, when the portable speaker system 11 is further carried after being operated, the connection cord 7 is similarly accommodated in the accommodation space 59 of the lid member 5. Therefore, the portable speaker system 11 is excellent in handling characteristics when being carried, and the connection cord 7 is less likely to be lost.

  FIG. 8 is a graph comparing the sound pressure frequency characteristics in the low frequency range of the portable speaker system 11 of the present embodiment with other comparative examples. Since the portable speaker system 11 is a speaker system including a small cabinet suitable for carrying, for example, the speakers 2L and 2R each have a diameter of 3 cm, and the entire volume is limited to a very small volume of about 320 cc. Here, the cabinet of the portable speaker system 11 is (A) the double bass reflex of this embodiment (first cavity: about 200 cc, duct 4: port diameter 17 mm, length 55 mm, second cavity: about 100 cc, duct 6L and 6R: port diameter 10 mm, length 20 mm), (B) conventional bass reflex (cavity: about 320 cc, duct: port diameter 20 mm, length 49 mm), and (C) conventional sealing (cavity) : About 320 cc).

  Comparing the frequency characteristics shown in FIG. 8, the speaker system 11 of this embodiment shown in FIG. 8A is a double bass reflex, so that the reproducible bandwidth in a lower frequency range is expanded compared to (B) a conventional bass reflex or (C) sealed. It has the highest low-frequency reproduction capability. Therefore, in the portable speaker system 10, it is possible to achieve both carryability when carrying and good low frequency reproduction characteristics.

  In the portable speaker system 11, when the accommodation space 59 for accommodating the connection cord 7 is provided in the lid member 5, the volume that can be used as the entire acoustic capacity may be reduced. (A) In the portable bass speaker system 11 of double bass reflex, the volume that can be used as the entire acoustic capacity by providing the accommodation space 59 in the lid member 5 is larger than in the case of (B) and (C) of the comparative example. Despite the decrease, good low frequency reproduction capability can be secured. Of course, if the same accommodating space 59 is provided in the case of the comparative example (B) bass reflex and in the case of (C) sealed, the reproducible low frequency limit frequency increases, so the double bass reflex of (A) In some cases, the difference will open further.

  Thus, the portable speaker system 11 of the present embodiment has excellent handling characteristics when being carried, and can ensure good low frequency reproduction characteristics even in a small cabinet that is easy to carry, And the connection cord 7 can be accommodated in the lid member 5, and the connection cord 7 is not lost, thereby improving the portability.

  In the portable speaker system 11 according to the second and third embodiments, the speaker 2L corresponding to the left stereo signal and the speaker 2R corresponding to the right stereo signal share the first cabinet 30 and the duct 4 of the cabinet 3. In this case, a partition wall for separating the left and right channels and a duct are provided in the cabinet 3 and in the lid member 5 so as to form a double bass reflex cabinet in each of the speakers 2L and 2R. May be.

  The portable speaker system of the present invention can be applied not only to the speaker system but also to headphones that are carried around and reproduce sound.

It is a figure explaining portable speaker system 1 at the time of carrying by a desirable embodiment of the present invention. Example 1 It is a figure explaining the portable speaker system 1 at the time of operation | movement by preferable embodiment of this invention. Example 1 It is a figure explaining portable speaker system 10 at the time of carrying by a desirable embodiment of the present invention. (Example 2) It is a figure explaining the portable speaker system 10 at the time of operation | movement by preferable embodiment of this invention. (Example 2) It is a figure explaining portable speaker system 11 at the time of carrying by a desirable embodiment of the present invention. (Example 3) It is a figure explaining the portable speaker system 11 at the time of operation | movement by preferable embodiment of this invention. (Example 3) It is a figure explaining the cover member 5 which comprises the portable speaker system 11 by preferable embodiment of this invention. (Example 3) It is a graph which compares the sound pressure frequency characteristic in the low range of the portable speaker system 11 of a present Example with another comparative example. (Example 3)

Explanation of symbols

1, 10, 11 Portable speaker system 2, 2L, 2R Speaker 3 Cabinet 30 First cavity 31 Front baffle 32 Rear baffle 4 Duct 5 Lid member 50 Internal space, 2nd cavity 6, 6L, 6R Duct 7 Connection cord

Claims (6)

A speaker system comprising a speaker, a cabinet to which the speaker is attached, and a lid member that protects the speaker,
The cabinet includes a first baffle to which the speaker is attached, a second baffle provided separately from the first baffle, and at least a first cavity defined by the first baffle and the second baffle;
The first baffle has a first connecting portion that removably connects the lid member;
The second baffle has a second connecting part for connecting the lid member removed from the first baffle; and a first duct communicating with the first cavity;
The lid member coupled to the second coupling part during operation defines a second cavity communicating with the first duct together with the second baffle, and includes a second duct communicating with the second cavity.
Speaker system. A first half pipe part that constitutes the second duct together with the second baffle when the lid member is connected to the second connection part;
The speaker system according to claim 1. The second baffle of the cabinet further includes a second half pipe portion constituting the second duct corresponding to the first half pipe portion of the lid member;
The speaker system according to claim 2. The lid member further includes an accommodation wall portion that defines an accommodation space blocked from the second cavity, and an accommodation lid that defines an accommodation space together with the accommodation wall portion,
The speaker system according to any one of claims 1 to 3. The lid member further includes a connection cord that is housed in the housing space;
The cabinet includes a connector connected to the speaker by internal wiring;
When the lid member is coupled to the second coupling portion, the connection cord taken out from the accommodation space is connected to the connector.
The speaker system according to claim 4. The speaker includes at least a left speaker to which a left stereo signal is input and a right speaker to which a right stereo signal is input,
The left speaker diaphragm and the right speaker diaphragm separate the front side space of the first baffle and the first cavity of the cabinet;
The speaker system according to claim 1.