JP5070184B2 - Loudspeaker - Google Patents

Description

  The present invention relates to a loudspeaker. More specifically, the present invention relates to a loudspeaker comprising an amplifier having an operation unit, a speaker connected to the amplifier, and a case for housing them, the case being made of first and second divided bodies that can be opened and closed.

As a loudspeaker as described above, for example, the one described in Patent Document 1 is known. The telephone loudspeaker described in this document is provided with a built-in speaker and an operation panel facing each other inside a case as shown in FIG. Therefore, the device cannot be operated unless the lid is completely opened during use, and it is difficult to emit sound from the speaker to the outside.
JP-A-10-336298

  In view of such a conventional situation, an object of the present invention is to provide a loudspeaker that can be operated even when used in a state in which a main part of a case is closed, and that can amplify sound to the outside. .

  In order to achieve the above object, the loudspeaker according to the present invention is characterized by an amplifier having an operation unit, a speaker connected to the amplifier, and a case for housing them, the case being openable and closable first, In the configuration including the second divided body, the first divided body includes a lower main body portion and an upper lid portion. The main body portion is connected to the second divided body during use, and the lid portion is used. The amplifier is attached to the main body, the operation unit is disposed on the lid side and can be operated by opening the lid, and the speaker is attached to the second divided body. A through hole is provided in the upper part of the case, and sound generated inside the case is released to the outside of the case through the through hole.

  According to the above configuration, since the lid portion on the upper side of the first divided body of the case can be released, the user can operate it without opening the case body. Therefore, for example, it can operate in the state which stood without mounting a loudspeaker. Moreover, since the speaker is provided in the second divided body, it is possible to effectively utilize the internal space where the amplifier does not exist. And since the operation part is arrange | positioned at the cover part side, it can be used, for example with a speaker facing outside and a cover part on the user side, and operativity is very favorable. Furthermore, since the through hole is provided in the upper part of the case, the sound inside the case is released to the outside through the through hole even when the lid is closed as well as when the lid is released. Moreover, since the through hole communicates with the space of the speaker, the acoustic efficiency is also improved. Therefore, it can be operated even when the case main body is closed, and the voice can be clearly amplified outside.

  The through hole may be provided in the lid. By providing the through hole in the lid portion facing the speaker, the sound inside the case can be released to the outside. Further, by providing a pair of the speakers at an appropriate interval, the loudspeaker can be amplified with a larger output.

  It is desirable to further include a display unit for displaying information externally between the pair of speakers. By providing the display unit between the speakers, information can be displayed using the display unit at the same time in the sound emission direction, and appeal to the audience using not only sound but also vision. In this case, the display unit may include a holding plate that holds a sheet-like medium describing information on the outer surface of the case. The structure of the display unit is simple and the medium can be handled easily.

  The second divided body may further include a storage unit that stores at least a microphone and a charger therein. By storing the equipment used for the loudspeaker, it becomes easy to carry. In the configuration described in any of the above, the case may be an attache case.

  According to the characteristics of the portable loudspeaker according to the present invention, the operation can be performed even when the main part of the case is closed, and the voice can be loudened to the outside.

  Other objects, configurations, and effects of the present invention will become apparent from the following embodiments of the present invention.

Next, the present invention will be described in more detail with reference to the accompanying drawings as appropriate.
As shown in FIGS. 1 to 5, the loudspeaker 1 according to the present invention generally includes a case 2, an amplifier 3, and a speaker 4, and the amplifier 3 and the speaker 4 are housed inside the case 2. The case 2 is generally composed of first and second divided bodies 20 and 30 and is connected to a pair of hinges 11 and 11 so as to be freely opened and closed. A display unit 40 is provided on the outer surface of the second divided body 30.

  As shown in FIGS. 1, 2, and 5, the case 2 is provided with protrusions 12 serving as legs that allow the case 2 to stand upright in the vicinity of each corner of the bottom surface. A handle 13 is provided on the upper surface of the case 2, and attachment portions 15 for attaching shoulder straps 14 are provided on both side surfaces of the case 2. The handle 2 or the shoulder strap 14 makes the case 2 an attachable case that is easy to carry.

  As shown in FIGS. 2 to 4, the first divided body 20 generally includes a lower main body portion 21 and an upper lid portion 22. As shown in FIG. 2, the main body portion 21 and the lid portion 22 are connected to each other via a pair of hinges 23 and 23 so as to be freely opened and closed. As shown in FIGS. 3 and 4, an amplifier 3 is attached inside the main body 21, and an operation unit 60 for operating the amplifier 3 such as a power switch and a knob for adjusting the volume is provided on the upper surface of the amplifier 3. is there.

  As shown in FIGS. 2 to 4, in the vicinity of the left and right end portions of the lid portion 22, a pair of through holes 24 and 24 penetrating the lid portion 22 are provided. A net-like cover 25 is attached to each of the through holes 24 to prevent foreign matters such as dust from entering the case 2. As shown in FIG. 3, a space 26 communicating with the through holes 24, 24 is formed in the lid portion 22 above the amplifier 3. As shown in FIG. 4, by opening the lid portion 22 via a pair of hinges 23, an operation portion 60 described later can be operated.

  As shown in FIG. 3, the second divided body 30 has a storage portion 31 formed therein, and a pair of speakers 4 and 4 are attached to the storage portion 31 symmetrically. Since the amplifier 3 is arranged in the first divided body 20, the storage portion 31 can be formed in a space having a large capacity. As shown in FIG. 1, the pair of speakers 4, 4 are attached outward in attachment holes 32, 32 penetrating the second divided body 30. Thereby, the speakers 4 and 4 can amplify the sound toward the outside of the case 2. Further, a cover 33 made of a punching metal or the like that allows sound to pass through is attached to the outer surface of the attachment hole 32. The storage portion 31 communicates with the space 26 inside the lid portion 22 described above. A battery 5 is fixed between the speakers 4 and 4.

  As shown in FIG. 3, for example, the wireless microphone 6 a and the charger 7 stored in a bag are stored in the storage unit 31. The wireless microphone 6a and the charger 7 are protected by a buffer member 34 made of sponge or the like. In addition, as shown in FIG. 5, an antenna 35 that receives an audio signal of the wireless microphone 6 a, an input terminal 36 of the wired microphone 6 b, and an input terminal 37 of the charger 7 are provided at the lower right side of the second divided body 20. The antenna 35 and the input terminals 36 and 37 are connected to the amplifier 3, respectively. As shown in FIGS. 1 and 5, the antenna 35 is provided so as to be rotatable via an attachment portion 35 a.

  As shown in FIG. 1, the display unit 40 is provided between a pair of speakers 4 and 4 on the outer surface of the second divided body 30. As shown in FIG. 6, the display unit 40 includes a sheet-like medium 41 on which information to be displayed on the outside is described, a holding plate 42 that holds the medium 41, and a holding plate 42 that is divided into the second divided body 30. It consists of the fixture 43 attached to an outer surface. The holding plate 42 is formed of, for example, a transparent acrylic plate in a substantially square shape, and holds the medium 41 by pressing the medium 41 into the mounting holes 44 of the second divided body 30 via the four-side mounting tools 43. Thus, by providing the display unit 40 between the speakers 4 and 4, information can be displayed simultaneously using the display unit in the sound emission direction, and not only the sound but also the vision can be used. Can appeal to the audience.

  Here, examples of information to be displayed to the outside include characters, figures, photographs, and the like of face images, slogans, and pledges of election candidates, and explanations and illustrations of products. The sheet-like medium 41 is made of paper, synthetic resin, or metal.

  As shown in FIGS. 1 to 5, the first and second divided bodies 20 and 30 described above are formed by a pair of engaging members 51 and 51 on the upper surface of the case 2 and a pair of engaging members 52 and 52 on both side surfaces of the case 2. It is detachably engaged. As shown in FIG. 4, the engaging member 51 is generally composed of an engaged portion 51a, an engaging piece 51b, and a lever 51c. The engaged portion 51a is provided on the upper surface of the lid portion 22 of the first divided body 20, and the engagement piece 51b and the lever 51c are provided on the upper surface of the second divided body 30 so as to face the engaged portion 51a. . The lid portion 22 is fixed to the second divided body 30 by operating the lever 51c to detachably engage the engaging piece 51b with the engaged portion 51a. By the pair of engaging members 51, 51, the lid portion 22 of the first divided body 20 is configured to be openable and closable with respect to the second divided body 30.

  Further, the engaging member 52 has the same configuration as the above-described engaging member 51. As shown in FIG. 5, the engaged portion 52 a is provided on the side surface of the main body portion 21 of the first divided body 20, and the engaging piece 52 b and the lever 52 c are provided on the side surface of the second divided body 30. By the pair of engaging members 52, 52, the main body portion 21 of the first divided body 20 can be opened and closed with respect to the second divided body 30. The first divided body 20 and the second divided body 30 are configured to be openable and closable together with the engagement member 51 described above.

Next, the internal structure of the loudspeaker 1 will be described with reference to FIGS.
As shown in FIG. 4, the operation unit 60 generally includes a power switch 61, a knob 62 that adjusts outputs of the amplifier 3, the speaker 4, and the microphone 7, a card insertion slot 63 into which the IC card 8 is inserted, and a later-described operation. Switch group 64 for operating the digital recording / playback circuit 80 and LEDs 65a and 65b for displaying the recording / playback state.

  As shown in FIG. 7, the audio signal input to the wireless microphone 6 a is received by the antenna 35 and output to the microphone amplifier 72 via the receiver 71. The audio signal input to the wired microphone 6 b is output to the microphone amplifier 72 via the input terminal 36. The microphone amplifier 72 amplifies the input audio signal and outputs the signal to the mixer amplifier 73. The output audio signal is output from the speakers 4 and 4 via the digital power amplifier 74. In the present embodiment, the wireless microphone 6a and the wired microphone 6b can be used simultaneously.

  A digital recording / playback circuit (hereinafter referred to as “digital recording / playback circuit”) 80 includes an IC card insertion slot 63 and is connected to a mixer amplifier 73. The audio signal stored in the IC card 8 is reproduced by the digital recording / reproducing circuit 80, outputted to the digital power amplifier 74 via the mixer amplifier 73, and the audio is outputted from the speakers 4 and 4. The audio signals from the wireless microphone 6 a and the wired microphone 6 b can be input to the digital recording / playback circuit 80 via the mixer amplifier 73, and the input audio signal can be recorded on the IC card 8. The charger 7 charges the battery 5 via the input terminal 37.

  As shown in FIG. 8, the digital recording / playback circuit 80 generally includes a card connector 81 of the IC card insertion slot 63, a control unit 82, an A / D converter 83, a D / A converter 84, and a mixing unit 85. , Consisting of a volume 86. The audio signal from the microphone input 91 is input to the mixing unit 85 after the volume 86a is adjusted via the microphone amplifier 87a. In addition, an external line input 92 is also possible, and the audio signal input through the line is adjusted by the volume 86 b via the amplifier 87 b and input to the mixing unit 85. The mixed audio signal is digitally converted by the A / D converter 83 and input to the control unit 82.

  The control unit 82 can record the input audio signal on the IC card 8 or reproduce the already recorded audio signal by operating the switch group 64 of the operation unit 60. In recording, the control unit 82 is turned on by operating the switch 64a, and recording is started by operating the recording switch 64b. The control unit 82 receives an input of the mixed audio signal, records the audio signal on the IC card 8, and turns on the LED 65a during recording. Then, by operating the recording switch 64b, recording is ended and the LED 65a is turned off. During recording, the audio signal from the microphone is output from the speaker 4.

  Further, the control unit 82 reproduces the audio signal stored in the IC card 8 by operating the switch 64a and lights the LED 65b during reproduction. Then, by operating the switch 64a, the reproduction is finished and the LED 65b is turned off. Further, the control unit 82 pauses recording or reproduction by operating the stop switch 64c. During the pause, the LEDs 65a and 65b are turned off.

  The audio signal output from the control unit 82 is converted into an analog signal by the D / A converter 84, adjusted by the volume 86c, and output from the speaker 4 via the speaker amplifier 87d. In addition to the speaker output 94, a line output 93 to the outside is also possible via the volume 86c and the amplifier 87c. In addition, the control unit 82 outputs the audio signal from the microphone together with the reproduced sound from the speaker 4 while reproducing the sound of the IC card 8.

Next, how to use the loudspeaker 1 will be described.
First, the user opens the cover 22 of the first divided body 20 and operates the operation unit 60 to set the output of the amplifier 3 and the like as appropriate. Further, the medium 41 is attached to the outer surface of the case 2 by the holding plate 42 in the display unit 40. And the cover part 22 is closed and used. The sound input from the microphone 6 is amplified by the speakers 4 and 4 through the amplifier 3. Here, the amplifier 3 is arranged in the first divided body 20, and the speaker 4 is arranged in the second divided body 30. Therefore, the cover part 22 with the operation part 60 disposed can be directed toward the user side with the speaker 4 facing the outside of the user, and the operation is easy.

  As shown in FIG. 9, the speakers 4 and 4 not only amplify the sound P from the front of the speaker to the outside of the case 2 through the mounting holes 32 but also generate the sound P ′ inside the case 2 on the back side. . As described above, the storage portion 31 inside the case 2 and the space 26 inside the lid portion 22 communicate with each other, and the through-hole 24 is provided in the lid portion 22. Therefore, the sound P ′ inside the case 2 is emitted from the through hole 24 to the outside of the case 2. As a result, no sound is trapped inside the case 2 and the sound output from the speakers 4 and 4 becomes clear. Accordingly, the main body 21 can be used in a closed state.

  Further, when recording an audio signal input from the microphone 6 to the IC card 8 or recording and reproducing an already recorded audio signal, the lid 22 is opened and the switch group 64 of the operation unit 60 is operated. Record or play as appropriate. As described above, since the lid portion 22 is formed so as to be openable in use, the operation portion 60 can be appropriately operated while being used.

Finally, reference is made to the possibilities of other embodiments of the invention. In addition, the same code | symbol is attached | subjected to the member similar to the above-mentioned embodiment.
In the above embodiment, the through hole 24 is provided in the lid portion 22 of the first divided body 20. However, this through-hole may be provided on the second divided body 30 side as indicated by reference numeral 24 ′, for example, as long as sound generated inside the case 2 can be emitted to the outside. Moreover, you may provide in both the 1st, 2nd division bodies 20 and 30. FIG.

  In the above embodiment, the display unit 40 is provided between the speakers 4 and 4 on the outer surface of the second divided body 30. However, the display unit 40 may be provided at an appropriate location on the outer surface of the case 2. For example, it may be provided only on the outer surface of the first divided body 20 or may be provided on both outer surfaces of the first and second divided bodies 20 and 30. However, the above embodiment is excellent in that information can be appealed to the audience using not only sound but also vision.

  In addition, the display unit 40 includes the medium 41 and the holding plate 42 on the outer surface of the second divided body 30. However, the display part 40 will not be specifically limited if it is an aspect which can attach the sheet-like medium 41 to the outer surface of the case 2 so that identification is possible. Further, the display unit may be constituted by an electric bulletin board, a monitor or the like, and the advertisement information may be displayed electronically.

  In the above embodiment, an IC card is used as a storage medium for recording and reproducing sound. However, the recording medium is not limited to an IC card, and may be any storage medium capable of storing audio information, and may be, for example, a CD-R, DVD-R, HDD, or the like.

  The present invention can be used, for example, as a loudspeaker used for street speeches and gatherings in election campaigns. Moreover, it can be used not only for election campaigns but also for advertisements and events on the street. Of course, the loudspeaker according to the present invention can be used not only outdoors but also indoors such as lectures and conferences.

1 is a front view of a loudspeaker according to the present invention. It is a rear view of a loudspeaker. It is a perspective view of the loudspeaker which shows the state which open | released the 1st division body. It is a top view of a loudspeaker which shows the state which open | released the cover part. It is a right view of a loudspeaker. It is a schematic side view which shows a display part. It is a wiring block diagram of a loudspeaker. It is a wiring block diagram of a digital recording / reproducing circuit. It is the sectional view on the AA line of FIG. 2 which shows the flow of an audio | voice schematically.

Explanation of symbols

1: loudspeaker, 2: case, 3: amplifier, 4: speaker, 5: battery, 6: microphone, 6a: wireless microphone, 6b: wired microphone, 7: charger, 8: IC card (recording medium), 11 : Hinge, 12: leg (projection), 13: handle, 14: shoulder strap, 15: attachment, 20: first divided body, 21: main body, 22: lid, 23: hinge, 24: through hole 25: cover, 26: space, 30: second divided body, 31: storage section, 32: mounting hole, 33: cover, 34: buffer member, 35: antenna, 36: input terminal for wired microphone, 37: charging Input terminal for devices, 40: display unit, 41: medium, 42: holding plate, 43: fixture, 44: hole, 51, 52: engagement member, 51a, 52a: engaged portion, 51b, 52b: engagement Piece 51c, 52c: lever, 60: operation unit, 61: switch, 2: Pick, 63: IC card insertion slot, 64: Switch, 65: LED, 71: Receiver, 72: Microphone amplifier, 73: Mixer amplifier, 74: Digital power amplifier, 80: Digital recording / playback circuit, 81: Card Connector, 82: Control unit, 83: A / D converter, 84: D / A converter, 85: Mixing unit, 86a to d: Volume, 87a to d: Amplifier, 91: Microphone input, 92: Line input, 93: Line output, 94: Speaker output, P, P ': Audio

Claims (7)

An amplifier having an operation unit, a speaker connected to the amplifier, and a case for storing these, the case is a loudspeaker comprising a first and a second divided body that can be opened and closed,
The first divided body includes a lower main body portion and an upper lid portion, the main body portion is connected to the second divided body when in use, and the lid portion is openable and closable during use. Is attached to the main body part, the operation part is arranged on the lid part side and can be operated by opening the lid part, the speaker is attached to the second divided body, and is attached to the upper part of the case. A loudspeaker provided with a through hole and emitting sound generated inside the case to the outside of the case through the through hole. The loudspeaker according to claim 1, wherein the through hole is provided in the lid. The loudspeaker according to claim 1 or 2, wherein a pair of the speakers are provided at an appropriate interval. The loudspeaker according to claim 3, further comprising a display unit that displays information between the pair of speakers. The loudspeaker according to claim 4, wherein the display unit includes a holding plate that holds a sheet-like medium on which information is written on the outer surface of the case. The loudspeaker according to any one of claims 1 to 5, wherein the second divided body further includes a storage portion for storing at least a microphone and a charger therein. The loudspeaker according to claim 1, wherein the case is an attache case.

Images