JP2019121898A - Speaker device - Google Patents

Abstract

To provide a speaker device containing an amplification circuit performing a pulse modulation and amplifying a power, in which a whole small and light-weight are achieved at low cost, so as to be adopted to, for example, a neck type speaker device attaching a speaker to a housing curved-formed in an almost inverse U-shaped so as to allow a neck part and a shoulder part of a user to be engaged.SOLUTION: A speaker device comprises: an electrodynamic speaker having a voice coil and a diaphragm that coupled to the voice coil; a cabinet to which the electrodynamic speaker is attached, and which has a sound signal input terminal provided so as to be connected to the voice coil; and a circuit board module which is attached to the cabinet and in which a circuit element forming an amplification circuit amplifying a power of a sound signal is arranged. A sound signal output terminal from the amplification circuit provided to the circuit board module and the sound signal input terminal of the cabinet are directly connected without interposing a coil element and a connection wire therein.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a speaker device suitable for realizing a neck-type speaker device by being attached to a housing that is curved in a substantially reverse U shape so as to be able to be locked to the neck and shoulder of a user.

  A necked speaker device, which is an electronic device worn on the neck of a user, has a shape and configuration similar to overhead type headphones mounted on the head of the user having a headband. The headphones have a housing with a speaker unit attached to the user's ear for audio reproduction, while the necked speaker device has a substantially inverted U shape so that it can be locked to the user's neck and shoulders A speaker that emits sound waves may be attached to a curved case.

  In the neck-type speaker device, the speaker is fixed at a position away from the user's ear, so that the ear is not blocked like headphones. In this respect, the neck speaker device is more advantageous than the headphone when the user needs to pay attention to the external sound other than the sound reproduced from the speaker. That is, the neck speaker device is an advantage over headphones or earphones that external sounds other than the sound reproduced from the speaker also come into the user's ear.

  In addition, not only the stereo type thing by which a pair of left and right housings are connected by a headband etc. but also the monaural type thing which mounts a housing only on one ear of a user, and a housing It includes a so-called headset provided with a microphone device. The neck speaker device may include not only a speaker but also an amplifier for amplifying an audio signal, a circuit such as a transceiver for wirelessly transmitting and receiving an audio signal, a connection terminal for further connecting an earphone or a headphone, and the like. .

  For example, a headband may be provided at both ends of a headband in which a pair of speakers and an ear pad are curved in a substantially inverted U shape so that it can be used as a simple installation type speaker or as a headphone on a neck There is a headphone provided with a speaker rotation mechanism that can rotate in the outward direction of the head, and the speaker is rotationally fixed to the inside of the headband (Patent Document 1).

  In addition, the neck type speaker device may be, for example, a neck type speaker capable of hanging in a non-contact state with a listener's ear, and has a base portion having a curved portion in contact with the back of the listener's neck. A speaker unit provided with a speaker unit having a fixed or variable speaker angle at one or both ends of the base so that the front surface of the speaker serving as a sound source is directed toward the inner vicinity of the curved portion There is a speaker (patent document 2).

  In the neck speaker device, the acoustic device is mounted on the user's torso side of the user's torso and on the torso side of the central axis of the torso with the acoustic device attached to the user, A parametric speaker in which a plurality of ultrasonic transducers are juxtaposed, emitting an ultrasonic wave modulated to generate an audible sound, and an ultrasonic wave emitted from the parametric speaker when the acoustic device is attached to a user There is a portable type audio device provided with an adjustment unit configured to be adjustable toward the pinnacle (Patent Document 3).

  However, since the neck-type speaker device is an electronic device whose part worn on the user's body is different from headphones, the structure that the housing should have and the structure and characteristics that the speaker should have are those of normal headphones. It may be different from. For example, the parametric speaker in which a plurality of ultrasonic transducers described in Patent Document 3 are juxtaposed is excellent in that the directivity can be extremely narrowed for emitting a sound wave toward the user's ear, but the reproduction sound quality Has the disadvantage of being inferior to electrodynamic speakers.

  In addition, parametric speakers are not practical because they are extremely expensive compared to general electrodynamic speakers. A necked speaker system using electrodynamic speakers is advantageous in terms of cost and weight. However, as in Patent Document 1 or 2, in the case of simply emitting the acoustic wave by directing the diaphragm of the electrodynamic speaker toward the user's ear, it has a diaphragm with a small diameter compared to the wavelength of the acoustic wave to be reproduced. Since the directivity of the electrodynamic speaker becomes wide, there is a problem that the prior art is not sufficient, for example, it tends to be a neck speaker device in which sound leakage tends to be large around the user.

  A small dynamic electrodynamic speaker is, for example, a speaker system including a speaker including a diaphragm and a cabinet to which the speaker is attached, and the cabinet is radiated to the front side of the diaphragm of the speaker A front sound conductor for leading sound waves to free space, the front sound conductor being emitted from the sound source space and a front cavity for defining a sound source space corresponding to a frame peripheral portion supporting the diaphragm of the speaker; Vibration is attached to the side wall of the front cavity so that at least a part of the peripheral part is formed so that one side is formed from a sheet member of resin and one side faces the diaphragm of the speaker A flat member disposed in the sound source space so as to vibrate in accordance with the sound wave radiation from the plate, and the other not facing the diaphragm of the flat member speaker Has a sound absorbing member attached to the surface, and there is a speaker system (Patent Document 4).

Unexamined-Japanese-Patent No. 2000-316198 JP, 2009-201088, A JP, 2013-191996, A Patent No. 5987820 gazette

  The present invention has been made to solve the above-mentioned problems of the prior art, and the object thereof relates to a speaker device including an amplifier circuit for pulse modulation and power amplification, for example, in the neck and shoulder of a user. Lower cost for a compact, lightweight speaker system suitable for neck-type speaker systems where the speaker is mounted at a position corresponding to the user's ear of the housing that is curved in a substantially inverted U-shape to allow locking. To provide.

  A speaker device according to the present invention includes: an electrodynamic speaker including a voice coil and a diaphragm coupled thereto, and a cabinet having an audio signal input terminal provided so as to be attached to the electrodynamic speaker and connected to the voice coil. An audio signal output terminal from the amplifier circuit provided in the circuit board module, and an audio signal of the cabinet, the circuit board module including the circuit board module mounted on the cabinet and forming the circuit element forming the amplifier circuit for amplifying the power of the audio signal; The input terminals are directly connected without interposing a coil element and a connecting wire between them.

  Preferably, in the speaker device of the present invention, the circuit board module includes an amplification circuit that pulse-modulates and amplifies the input audio signal, and a power supply circuit that supplies a power supply potential to the amplification circuit. At least a control signal input terminal to which a control signal for controlling the power supply circuit is input, an audio input terminal to which an audio signal is input, and a power supply terminal to which a power supply potential supplied to the power supply circuit is input.

  Preferably, in the speaker device according to the present invention, the cabinet includes a sound path portion defining a sound path for deriving a sound wave radiated from the front side of the diaphragm of the electrodynamic speaker, an acoustic capacity on the back side of the diaphragm The sound guiding portion is set such that the area of the cross section substantially orthogonal to the direction of the sound wave in the sound path is smaller than the area of the diaphragm.

  Preferably, in the speaker device according to the present invention, the electrodynamic speaker is attached to the cabinet such that the direction of the sound wave in the sound path of the sound guiding portion is substantially orthogonal to the direction in which the diaphragm of the electrodynamic speaker vibrates. ing.

  Preferably, in the speaker device according to the present invention, the circuit board module is a sound path portion of a cabinet, or an outer shell surface provided with an audio signal input terminal for defining a rear cabinet portion, and the vibration of the electrodynamic speaker The plate is attached to a fixed plane extending in a direction substantially orthogonal to the direction in which the plate vibrates.

  Hereinafter, the operation of the present invention will be described.

  A speaker device according to the present invention includes: an electrodynamic speaker including a voice coil and a diaphragm coupled thereto, and a cabinet having an audio signal input terminal provided so as to be attached to the electrodynamic speaker and connected to the voice coil. And a circuit board module in which circuit elements are mounted on the cabinet to form an amplifier circuit for power amplifying the audio signal.

  Here, the audio signal output terminal from the amplification circuit provided in the circuit board module and the audio signal input terminal of the cabinet are directly connected without interposing the coil element and the connection line between them. The speaker device includes a circuit board module including an amplification circuit that pulse-modulates an input audio signal for power amplification, and a power supply circuit that supplies a power supply potential to the amplification circuit, and controls the amplification circuit and the power supply circuit. It is preferable to include at least a control signal input terminal to which a signal is input, an audio input terminal to which an audio signal is input, and a power supply terminal to which a power supply potential supplied to a power supply circuit is input.

  Therefore, the speaker device has the circuit board module attached to the cabinet, and the output of the amplifier circuit that performs pulse modulation and power amplification does not require a coil and a connecting line, so the whole becomes compact and lightweight, and the cost becomes low. In the speaker device, the electrodynamic speaker may be attached to the cabinet such that the direction of the sound wave in the sound path of the sound guiding portion is substantially orthogonal to the direction in which the diaphragm of the electrodynamic speaker vibrates. As a result, for example, a speaker suitable for a neck-type speaker device that mounts a speaker at a position corresponding to the user's ear of a housing that is curved in a substantially inverted U shape so as to be lockable on the user's neck and shoulders An apparatus is realized.

  The speaker device according to the present invention includes a speaker device including an amplifier circuit that performs pulse modulation and power amplification, for example, in a substantially inverted U-shaped case so as to be able to be locked to the user's neck and shoulder. The whole can be realized at a low cost and at a small size so as to be suitable for a neck type speaker device in which the speaker is mounted at a position corresponding to the user's ear.

It is a figure explaining the neck type speaker apparatus using the electronic device housing | casing by preferable embodiment of this invention. Example 1 It is a figure explaining the mounting state of the neck-speaker type | mold speaker apparatus by preferable embodiment of this invention. Example 1 It is a figure explaining the composition of the neck type speaker device by a desirable embodiment of the present invention. Example 1 It is a figure explaining the structure of the speaker apparatus by preferable embodiment of this invention. Example 1 It is a figure explaining the structure of the speaker apparatus by preferable embodiment of this invention. Example 1

  Hereinafter, although the neck-type speaker device according to the preferred embodiments of the present invention and the speaker device will be described, the present invention is not limited to these embodiments.

  FIGS. 1-5 is a figure explaining the neck type speaker apparatus 1 using the speaker 3 (or the left speaker 3L and the right speaker 3R) by preferable embodiment of this invention. Specifically, FIG. 1 is a perspective view of the neck-type speaker device 1, and FIG. 2 is a view for explaining a mounted state of the neck-type speaker device 1. Moreover, FIG. 3 is a perspective view explaining the structure of the housing | casing 2 of the neck-hanging speaker apparatus 1. As shown in FIG. 4 is an enlarged view of the speaker 3 viewed from the top side, and FIG. 5 is a cross-sectional view taken along the line A-A in FIG.

  The left speaker 3L and the right speaker 3R in the neck speaker device 1 of this embodiment use the same speaker 3 having a common configuration. The speaker 3 is configured as a speaker device including an electrodynamic speaker 30, a cabinet 31, and a circuit board module 40 as described later. Further, in the following, the structure of a part of the neck speaker device 1 or the speaker 3 (or the left speaker 3L and the right speaker 3R) unnecessary for the description of the present invention, the internal structure, etc. I omit it. Further, in FIG. 3, a part of the housing 2 is removed or shown as transparent.

  As shown in FIGS. 1 and 2, the neck-type speaker device 1 is an electronic device attached to the neck 5a and the shoulder 5c of the body of the user 4, and the speaker 3 for emitting sound waves is attached to the housing 2 The sound reproduction device is disposed at a position distant from the user's ear 5f. In the neck speaker device 1, the speaker 3 is attached to a housing 2 which is curved in a substantially reverse U shape so as to be able to be locked to the neck 5 a and the shoulder 5 c of the user 4. When the user mounts the neck-type speaker device 1, the vicinity of the central portion of the substantially inverted U-shaped curved case 2 is located near the back neck 5b of the user 4, and the substantially inverted U-shaped case is Both ends of 2 are positioned from the shoulder 5c of the user 4 to the chest 5d beyond the clavicle 5e. In the case of the present embodiment, the left and right speakers (3L, 3R) corresponding to the stereo signals including the left channel audio signal and the right channel audio signal in the neck speaker device 1 are substantially each of the ear 5f of the user 4. It is disposed at a position immediately below or immediately below and in the vicinity of the clavicle 5e.

  In the neck-type speaker device 1, since the speaker 3 is fixed at a position separated from the ear 5f of the user 4, it is like a headphone worn on the head to reproduce voice or an earphone worn on the ear Your ears will not be blocked. In this respect, when it is necessary for the user 4 to pay attention also to external sounds other than the sound reproduced from the speaker 3, the neck-type speaker device 1 is advantageous over the headphones.

  Since the neck speaker device 1 is an electronic device attached to the neck 5 a and the shoulder 5 c of the user 4, it is preferable that the necked speaker device 1 be flexibly deformed when attached so as not to damage the user 4 's body. With respect to the coordinate axes shown in FIG. 1, when the necked speaker device 1 is displaced so that both ends of the substantially inverted U-shaped casing 2 are displaced in the X direction and the space between them is largely opened, the rear neck of the user 4 The work of mounting on the neck 5a and the shoulder 5c can be facilitated by moving in the Y direction from the part 5b side. The neck-type speaker device 1 of the present embodiment includes the rear side connecting portion 25 formed of an elastomeric material having thermoplastic or thermosetting elasticity, as described later, so the housing 2 The two end portions of X can be deformed so as to be displaced in the X direction and the Z direction.

  The housing 2 in which the whole of the neck-type speaker device 1 of this embodiment is curved in a substantially inverted U shape is the right housing portion 21 on the right ear side of the user 4 and the left side on the left ear side of the user 4 It is comprised from the housing | casing part 23 and the rear side connection part 25 which connects the right side housing | casing part 21 and the left side housing | casing part 23. FIG. The right housing portion 21 and the left housing portion 23 are components such as a speaker 3 or an electronic component attached to the substrate 11 or 13 inside a housing formed of a resin having a curved cylindrical outer shell. Attach or store. Therefore, although the right side housing part 21 and the left side housing part 23 do not have flexibility, since the rear side connecting part 25 is formed of an elastically deformable material like an arc like a part of a thin ring, It is possible to construct the casing 2 which can be flexibly deformed to such an extent that the substantially inverted U-shaped both end portions can be opened and closed.

  As shown in FIG. 1, the left casing 23 of the neck speaker device 1 can be provided with an operation unit for performing necessary operations such as power on / off, volume control, and the like. In addition, if the left housing unit 23 further includes a circuit such as a microphone 8 that converts sound waves into audio signals and collects the sound, or a transceiver (not illustrated) that transmits the collected audio signals, etc. The neck speaker device 1 can be used as a headset device capable of telephone communication. Of course, these circuits may be provided in the right housing unit 21.

  Further, the neck-type speaker device 1 may further be provided with a connection terminal 6 for wire connection of the earphone 7 (only a part of which is illustrated), as in the case of the above-mentioned operation unit. The earphone 7 is an electro-acoustic transducer that is inserted into the ear hole of the user's ear 5 f to reproduce sound, and can reproduce sound instead of reproducing sound from the speaker 3. In that case, there is an advantage that the sound reproduced around the user 4 does not leak at all. Further, the neck speaker device 1 may be connected to a connection line for inputting an audio signal from another audio device.

  As illustrated in FIGS. 1 to 3, the right speaker 3 R is attached to the substrate 11 of the right housing unit 21 of the housing 2, so the upper surface side (Z-axis direction) of the right housing unit 21 is At the corresponding position, a sound emission hole 22 for emitting the sound wave emitted from the right speaker 3R toward the right ear of the user 4 is provided. Similarly, since the left speaker 3L is attached to the substrate 13 of the left casing 23 of the casing 2, the left speaker 3L is placed at the corresponding position on the upper surface side (in the Z-axis direction) of the left casing 23 A sound emission hole 24 is provided to radiate the sound wave emitted from the user 4 toward the left ear of the user 4.

  Although the sound output holes 22 or 24 of the present embodiment are configured by providing a large number of small holes, they have a substantially rectangular shape so as to increase the opening efficiency corresponding to the outlet of the sound path 36 of the speaker 3 described later. It may be a sound release hole which is an opening of The appearance of the diaphragm 3 of the speaker 3 can be stored in the inside of the housing 2 so that the appearance of the speaker 3 can not be seen, and the aesthetic appearance of the neck speaker device 1 can be improved. That is, the sound release holes 22 or 24 may be not only an opening provided with a large number of small holes but also a slit-like opening, an opening protected by a breathable net, or the like.

  The speaker 3 illustrated in FIGS. 4 and 5 has an asymmetrical shape and structure with respect to the X-axis direction illustrated, but the speaker 3 illustrated in FIGS. 4 and 5 is commonly used as the left speaker 3L and the right speaker 3R of the necked speaker device 1 It is used. The speaker 3 is configured as an electrodynamic speaker 30, a cabinet 31 in which the electrodynamic speaker 30 is housed, and a circuit board module 40 attached to the cabinet 31.

  The electrodynamic speaker 30 includes a dome-shaped diaphragm 30a, a voice coil 30b connected to the diaphragm 30a, a magnetic circuit 30c having a magnetic gap in which a coil of the voice coil 30b is disposed, a diaphragm 31 and a voice coil. And an edge for vibratably supporting the frame 30b and a frame 30d to which the magnetic circuit is connected. Therefore, when the voice signal current is supplied to the coil of the voice coil 30b, the driving force acts on the diaphragm 30a and the voice coil 30b to vibrate, and the sound waves are radiated from the diaphragm 30a in the back and forth direction with an antiphase relationship. Ru.

  The cabinet 31 includes a sound path portion 32 defining a sound path 36 for deriving a sound wave emitted from the front side of the diaphragm 30 a of the electrodynamic speaker 30, and an internal space 37 serving as an acoustic capacity on the back side of the diaphragm 30 a. And a rear cabinet portion 33 defining In this electrodynamic speaker 30, the direction of the sound wave in the sound path 36 of the sound conducting portion 32 (Z-axis direction) is substantially orthogonal to the direction in which the diaphragm 30a of the electrodynamic speaker 30 vibrates (X axis) , Is attached to the cabinet 31.

  In the speaker 3, the cabinet 31 has mounting portions 35 in which holes (not shown) through which screws can pass in the Z-axis direction are formed. Therefore, the speaker 3 is configured to be attachable to be mounted from above with respect to the substrate 11 or 13 extending along a plane including the X axis. Further, in the speaker 3, the outlet of the sound path 36 of the sound conducting portion 32 corresponds to the sound emitting hole 22 or 24 provided on the upper surface side of the housing 2, and the front surface of the diaphragm 30 a vibrates in the X axis direction. Sound waves emitted from the side pass through the sound path 36 and are emitted to the upper side in the Z-axis direction.

  The area of the cross section of the sound guiding portion 32 substantially orthogonal to the direction of the sound wave in the sound path 36 is set to be smaller than the area of the diaphragm 30 a. Furthermore, the area of the sound output hole 22 or 24 of the housing 2 is provided to be approximately the same as the area of the diaphragm 30 a of the dynamic speaker 30. As a result, since the sound wave emitted as if compressed in the sound path 36 of the sound guiding part 32 is emitted to the upper surface side in the Z-axis direction where the ear 5f of the user 4 is located, the directivity is narrowed and The sound leakage is reduced, and the sound wave reproduced by the speaker 3 of the neck-type speaker device 1 can be easily distinguished from other external sounds even under noise.

  In addition, even if it uses the same electrodynamic-type speaker 30, in the case of the cabinet which is not provided with such a sound path 36, the problem to which the way of a sound goes wrong may arise. The derivation direction of the sound wave in the sound path 36 of the sound guiding part 32 is not limited to the case where it is substantially orthogonal to the direction in which the diaphragm 30a of the electrodynamic speaker 30 vibrates. If the area of the cross section is set to be smaller than the area of the diaphragm 30, the same effect can be expected. The area of the cross section of the sound path 36 may increase as it approaches the exit of the sound path, but the length of a portion where the area of the cross section substantially orthogonal to the sound wave extraction direction is uniform and hardly changes is half of the whole It is preferable to set it as above.

  If the directivity of the speaker 3 can be narrowed in the necked speaker device 1, for example, the microphone 8 provided at a position separated from the sound output hole 24 in the left housing portion 23 of the housing 2 in the present embodiment. Since it can be made to act so that the reproduction | regeneration sound from the left speaker 3L may not mix, it is advantageous when utilizing the neck-hanging speaker apparatus 1 as a headset apparatus in which telephone communication is possible.

  Further, the cabinet 31 has a back cabinet 33 on the back side of the diaphragm 30a, which defines an internal space 37 serving as an acoustic capacity as a closed cabinet. Of course, the cabinet 31 further includes a duct which communicates with the internal space 37 and guides the sound waves radiated from the back side of the diaphragm 30a of the electrodynamic speaker 30 to the free space, thereby the internal space 37 on the back side. May be defined as a bass reflex type cabinet. It is possible to realize the speaker 3 excellent in the reproduction capability in the low frequency range.

  The circuit board module 40 of the speaker 3 includes a substrate 41 on which circuit elements 42 forming an amplification circuit for power amplifying an audio signal are disposed. In the circuit board module 40 according to the present embodiment, the circuit element 42 is disposed on one side or both sides of the substrate 41, and an amplification circuit for pulse-modulating an audio signal to amplify power is formed. Further, in the circuit board module 40, the switching power supply element 43 is disposed on one side of the substrate 41, and a power supply circuit for supplying a power supply potential to the amplifier circuit is formed.

  A control signal for controlling the amplification circuit and the power supply circuit is input to the circuit board module 40 from the board 11 (or 13) to which the speaker 3 is attached via the FPC (flexible printed board) 12 (or 14). That is, the circuit board module 40 includes a control signal input terminal (not shown), an audio input terminal (not shown) to which an audio signal is input, and a power supply terminal (not shown) to which a power supply potential to be supplied to the power supply circuit is input. And at least. Further, in the present embodiment, the audio signal output terminal 44 for outputting the audio signal whose power is amplified from the amplifier circuit is a surface on which the circuit element 42 is disposed, which is opposite to the surface on which the switching power supply element 43 is provided. It is provided on the side.

  The circuit board module 40 of the present embodiment is attached to the outer shell surface on which the audio signal input terminal 34 is provided by defining the rear cabinet portion 33 of the cabinet 31 via the connecting member 45. Since this outer shell surface is a fixed plane extending in a direction substantially orthogonal to the direction in which the diaphragm 30a of the electrodynamic speaker 30 vibrates, a relatively large area can be secured. From the audio signal input terminal 34, a lead wire (not shown) is connected to the voice coil 30 b of the electrodynamic speaker 30 through the rear cabinet unit 33. In the circuit board module 40, when the circuit element 42 is disposed only on one side of the substrate 41 to form an amplifier circuit and a power supply circuit, the outer shell of the cabinet 31 is formed without sandwiching the connecting member 45. You may attach so that the surface and the other surface of the board | substrate 41 may be stuck.

  Therefore, in the speaker 3, the audio signal output terminal 44 from the amplification circuit provided in the circuit board module 40 and the audio signal input terminal 34 of the cabinet 31 do not interpose the coil element and the connection line therebetween. It can be connected directly. Since the output of the pulse modulation amplification circuit and the input terminal 34 connected to the electrodynamic speaker 30 can be connected at the shortest, filterless (without filter) can be realized. It is general to provide a coil as a low-pass filter at the output of an amplifier circuit for pulse modulation and power amplification in order to suppress unnecessary radiation due to pulse modulation from a speaker connection line. However, in the speaker 3, since the coil and the connecting line are not required for the output of the amplifier circuit that performs pulse modulation and power amplification, the whole becomes compact and lightweight, and the cost can be reduced.

  In addition, since the substrate 11 (or 13) and the substrate 41 have a positional relationship substantially orthogonal to each other, they are connected via the flexible printed circuit (FPC) 12 (or 14) which can be bent as in this embodiment. preferable. The connecting member 45 may be a screw, a spacer, or the like that determines the positional relationship between the cabinet 31 and the circuit board module 40. Moreover, the cabinet 31 and the circuit board module 40 may be attached by a fixing means by means such as adhesion, fusion, or welding. Further, the audio signal input terminal 34 of the cabinet 31 may be provided on the outer shell surface of the sound path portion 32 of the cabinet 31. In this case, the circuit board module 40 may be attached to the sound path portion 32 side.

  As described above, the speaker 3 is commonly used as the left speaker 3L and the right speaker 3R of the neck-type speaker device 1. Although the speaker 3 has the same structure, although it has an asymmetrical shape and structure with respect to the X-axis direction shown in the figure, a dedicated mold for each of the symmetrical speakers is eliminated, There is an advantage that the cabinet 31 can be formed by a street mold. That is, even in the neck-type speaker device 1 whose shape of the left and right symmetrical casing 2 is desirable, it is not necessary to create a dedicated left and right symmetrical left speaker and right speaker, so the manufacturing cost can be significantly reduced. There is an advantage.

  As a result, in the necked speaker device 1 of the present embodiment, for example, the front side of the diaphragm 30a of the electrodynamic speaker 30 of the right speaker 3R corresponds to the housing 2 which is curved in a substantially reverse U shape. The right speaker 3R is attached to face the outside diameter of the housing 2 (Outside). The left speaker 3L is attached so that the front side of the diaphragm 30a of the dynamic speaker 30 of the other left speaker 3L faces the inside diameter (Inside) of the housing 2. Further, in the left speaker 3L and the right speaker 3R, since an audio signal is input to the circuit board module 40 via the FPC 12 (or 14), the FPCs connected to the circuit board module 40 having the same structure are both substantially reversed. It will be disposed on the rear neck side of the U-shaped housing 2.

  That is, when the left and right speakers 3 are attached so that the front side of the diaphragm 30a of any one of the electrodynamic speakers 30 faces the outer diameter side of the substantially inverted U-shaped casing 2, the other electrodynamic It suffices that the diaphragm 30a of the speaker 30 be attached so that the front side faces the inside diameter side of the substantially inverted U-shaped casing 2. Since the same speaker 3 is used in the adjustment of the sound quality of the neck-type speaker device 1, errors on the left and right are reduced, and there is an advantage that adjustment of unbalance between the left and right is unnecessary. Of course, even if the left and right speakers 3 are attached to the housing 2 so that the input terminals of the audio signal to the circuit board module 40 are disposed on the front end side of the substantially inverted U-shaped housing 2 on both left and right. Good.

  Further, in the neck-type speaker device 1 of the present embodiment, since the right speaker 3R and the left speaker 3L are the common speaker 3, one of the electrodynamic signals can be input when audio signals of the same phase are input together. The diaphragm 30a of the speaker 30 is displaced toward the outside diameter side (Outside) of the substantially inverted U-shaped housing 2, and the diaphragm 30a of the other electrodynamic speaker 30 is substantially inverted U-shaped. It is in a relation of being attached to the housing 2 so as to be displaced toward the inner side (Inside) of the housing 2. The vibration mode generated in the substantially inverted U-shaped casing 2 of the neck-type speaker device 1 can be changed as compared to the case of creating a dedicated left speaker and a dedicated right speaker.

  It is preferable that the speaker 3 is attached to the right side case 21 and the left side case 23 of the case 2 curved in a substantially inverted U shape of the case 2, but the neck speaker device 1 supports left and right stereo audio signals. It is not necessary to be a stereo type, and it may be a monaural neck type speaker device 1 provided with a speaker on only one of the left and right.

  Further, the housing 2 of the neck speaker device 1 is not limited to one that is curved in a substantially reverse U shape as long as it can be locked to the neck 5 a and the shoulder 5 c of the user 4. The shape of the housing 2 is not limited to a substantially symmetrical one, and may be an asymmetrical shape in which one side is short and the other side is long. Further, the shape of the housing 2 may be short so that both ends of the substantially inverted U-shaped housing 2 do not reach the clavicle 5 e of the user 4. Further, the shape of the housing 2 may be an annular shape by connecting both ends of the substantially inverted U-shaped housing 2.

  Further, the necked speaker device 1 of the above embodiment is an example of an electronic device to be attached to the user's body, and an electronic device using the speaker 3 which is such a speaker device is limited to the necked speaker device. It is not something that can be done. Even if the electronic device is not worn on the user's body, such electronic device can be adopted as long as the electronic device reproduces voice when the user operates it.

  The neck-type speaker device or the speaker device of the present invention is not limited to home stereo reproduction or telephone communication, and can be applied to vehicle-mounted audio devices and sound reproduction equipment such as movie theaters.

DESCRIPTION OF SYMBOLS 1 neck type speaker apparatus 2 housing | casing 3, 3 L, 3R speaker 4 user 6 earphone terminal 7 earphone 8 microphone 11, 12 board 13, 14 FPC
21 right side case part 23 left side case part 22 and 24 sound emission hole 25 back side connection part 30 electrodynamic speaker 31 cabinet 32 sound path part 33 back cabinet part 36 sound path

Claims (5)

An electrodynamic speaker including a voice coil and a diaphragm coupled thereto, a cabinet having an audio signal input terminal to which the electrodynamic speaker is attached and connected to the voice coil, and attached to the cabinet A circuit board module in which circuit elements forming an amplification circuit for power amplification of an audio signal are disposed;
An audio signal output terminal from the amplification circuit provided in the circuit board module and the audio signal input terminal of the cabinet are directly connected without interposing a coil element and a connection line between them.
Speaker device. The circuit board module includes the amplifier circuit that pulse-modulates and amplifies the input audio signal, and a power supply circuit that supplies a power supply potential to the amplifier circuit, and controls the amplifier circuit and the power circuit. At least a control signal input terminal to which a control signal is input, an audio input terminal to which the audio signal is input, and a power supply terminal to which a power supply potential supplied to the power supply circuit is input.
The speaker device according to claim 1. The cabinet defines a sound path portion that defines a sound path for deriving a sound wave emitted from the front side of the diaphragm of the electrodynamic speaker, and an internal space that becomes an acoustic capacity on the back side of the diaphragm. And a rear cabinet portion,
The sound guiding portion is set such that the area of a cross section substantially orthogonal to the direction of the sound wave in the sound path is smaller than the area of the diaphragm.
The speaker device according to claim 1. The electrodynamic speaker is attached to the cabinet such that the derivation direction of the sound wave in the sound path of the sound conducting portion is substantially orthogonal to the direction in which the diaphragm of the electrodynamic speaker vibrates. ,
The speaker apparatus of Claim 3. The circuit board module is an outer shell surface on which the sound path portion of the cabinet or the rear cabinet portion is defined and the audio signal input terminal is provided, and the diaphragm of the electrodynamic speaker vibrates Attached to a fixed plane extending in a direction substantially orthogonal to the
The speaker device according to claim 3 or 4.