JP4952223B2 - Ear speaker device - Google Patents

Description

  The present invention relates to an ear speaker device, and is suitable for application to, for example, a head-mounted wearable speaker device.

  2. Description of the Related Art Conventionally, in a headphone device that is an example of a head-mounted wearable speaker device, an audio signal representing a playback sound of a CD (Compact Disc) or the like is mounted on a listener's head (hereinafter, this is played back). That have been made to be listened to by the listener are widely used.

  In a general headphone device, a speaker unit that generates reproduced sound is positioned near the front of the listener's ear canal entrance, and the sound quality is improved by allowing sound to reach the eardrum directly from the speaker unit. Although improved, the sound image was localized in the listener's head, giving the listener an unnatural impression.

For this reason, in some headphone devices, the speaker unit is slightly separated from the ear canal entrance (ear hole) and positioned on the forehead side, so that the sound image is out of the head as in the case of a general stationary speaker. It has been devised to eliminate the unnatural feeling by localization and to make it possible to hear a sufficient bass by making a sealed type with a sealed space around the listener's ears (for example, patents) Reference 1).
Japanese Patent No. 3054295 (page 3, Fig. 1)

  By the way, in the headphone device having such a configuration, it is difficult to generate a three-dimensional sound field because it has a structure that only outputs reproduced sound from one speaker unit provided on each of the left and right sides. Since it is separated from the auricle, there was a problem that stability at the time of wearing was bad and usability was bad.

  The present invention has been made in consideration of the above points, and provides an ear speaker that gives a natural sound image localization and allows a listener to listen to a high-quality reproduced sound with a three-dimensional effect while maintaining stability when worn. The device is to be proposed.

In order to solve such a problem, in the present invention, a first housing portion mounted at a predetermined position on the listener's head and a first housing portion attached to one surface of the first housing portion, the first housing portion being the listener's head. A speaker unit for middle and high sounds disposed so that a predetermined distance is provided between the listener and the ear canal entrance, a mounting unit for mounting the first housing unit on the head, and a mounting unit A second housing portion that is attached to the listener's head via the first housing portion, and a low-frequency speaker unit that is provided for the second housing portion. The second housing portion further includes the second housing portion. Is extended to the vicinity of the ear canal entrance and is formed in a substantially U-shape so as to return to the second housing portion again, and a sound emitting hole is provided in the vicinity of the ear canal entrance. The generated bass is made to reach the vicinity of the ear canal entrance from the second housing part. It was so that provided Jo duct.

As a result, the first housing part having the middle / high tone speaker unit separated by a predetermined distance from the listener's ear canal entrance, and the bass generated by the bass speaker unit together with the bass speaker unit are transmitted to the ear canal entrance. Since the second casing portion having a substantially U-shaped tubular duct that reaches the vicinity is disposed on the listener's head via the mounting portion, the sound image is localized without being localized in the head. In addition, it is possible to output a high-quality reproduced sound with a three-dimensional effect while improving the balance by weight distribution at the time of mounting by the speaker unit for middle and high sounds divided into two.

According to the present invention, the first housing portion having the middle / high tone speaker unit separated by a predetermined distance from the listener's ear canal entrance, and the bass generated by the bass speaker unit together with the bass speaker unit. Since the second housing part having a substantially U-shaped tubular duct that reaches the vicinity of the entrance to the ear canal is disposed on the head of the listener via the mounting part, the sound image is natural without being localized in the head. An ear speaker device capable of giving a localization and outputting a high-quality reproduced sound with a three-dimensional effect while improving the balance by weight distribution at the time of mounting by the speaker unit for middle and high sounds divided into two Can be realized.

  Hereinafter, an embodiment of the present invention will be described in detail by dividing it into a first embodiment and a second embodiment.

(1) First Embodiment (1-1) Configuration of Ear Speaker Device in First Embodiment In FIG. 1, reference numeral 1 denotes the ear speaker device in the first embodiment as a whole, and a portable CD ( An audio signal generated by a playback process or the like of a compact disc (DMP) player or DMP (digital music player) is converted into a playback sound, which is listened to by a listener.

  Incidentally, in the ear speaker device 1 (FIG. 1), only the part visible from the left side of the listener is displayed and the part visible from the right side of the listener is not displayed, but both have the same left-right symmetric structure.

  The ear speaker device 1 is different from a general box speaker device in that it is assumed to be mounted on the listener's head 100 in the same manner as the headphone device. The ear speaker device 1 converts an audio signal into reproduced sound and reproduces it. Middle / high sound electroacoustic conversion unit 2L that mainly outputs middle / high sound among sounds, low-frequency electroacoustic conversion unit 3L that mainly outputs low sound among reproduced sounds, middle / high sound electroacoustic conversion unit 2L and bass The electroacoustic conversion unit 3L for use is composed of a band unit 4 for fixing the electroacoustic conversion unit 3L on the listener's head.

  In other words, the ear speaker device 1 has the middle / high tone electroacoustic transducer 2L and the bass electroacoustic transducer 3L arranged on the left side of the listener via the band unit 4, and the middle / high tone unit is located on the right side of the listener via the band unit 4. Since the electroacoustic transducer 2R (not shown) and the bass electroacoustic transducer 3R (not shown) are arranged, 2.2ch headphones are configured on the left and right.

  The band portion 4 is formed in an approximately arch shape that is convex upward in accordance with the shape of a general human head 100 around the central portion 4A, and slides freely with respect to the central portion 4A. The length of the entire band portion 4 can be adjusted by the adjustable portion 4BL.

  The band portion 4 has a middle / high-frequency electroacoustic transducer 2L attached to the tip of an approximately L-shaped arm 4C extending from the middle of the adjuster 4BL, and a bass tone at the tip of the adjuster 4BL. An electroacoustic conversion unit 3L is attached.

  The band portion 4 is formed in an arch shape having a diameter smaller than the shape of a general human head 100 and has an elastic force, and the listener's head is expanded while spreading the bass electroacoustic conversion portion 3L. When attached to the part 100, the elastic part of the band part 4 tries to return to its original shape, so the middle / high-frequency electroacoustic conversion part 2L and the low-frequency electroacoustic conversion part 3L are attached to the listener's head 100. It is made to hold | maintain in the state contact | abutted with respect.

  As a result, in the ear speaker device 1, the electroacoustic transducer 2L for middle and high sounds is positioned at a position away from the listener's pinna 101L forward by a predetermined distance, and the electroacoustic transducer 3L for bass is placed in the listener's pinna 101L. It is made to be located in the upper front side.

  The electroacoustic transducer 2L for middle / high sounds is a middle / high tone casing 5L shaped like a sphere divided into two halves in the vertical direction, and the baffle plate 2AL which is a plane portion of the middle / high pitch casing 5L. Are attached to a rear listener's ear canal entrance 102L, which is a middle / high tone speaker unit 7L for converting an audio signal into reproduced sound.

  The middle / high tone speaker unit 7L emits sound by vibrating the diaphragm in accordance with an audio signal supplied from a portable CD player, DMP or the like via a connection cable (not shown). .

  As a result, the middle / high tone electroacoustic conversion unit 2L of the ear speaker device 1 directly causes the middle / high tone radiated from the middle / high tone speaker unit 7L to reach the listener's external auditory canal entrance 102L, and the listener's cheeks, auricles 101L, and the like. Since the reflected sound reflected by the sound can reach the external ear canal entrance 102L, it is possible to provide a natural and three-dimensional sound image localization similar to the case of listening through a general stationary speaker. Yes.

  The bass electroacoustic conversion unit 3L is a bass unit 6L having a substantially spherical shape as a whole, and a bass speaker unit 8L is provided inside the bass unit 6L. The bass housing portion 6L is divided into an upper hemispherical portion 11L and a lower cover portion 12L with the bass speaker unit 8L as a boundary, and is arranged on the baffle plate 13L of the hemispherical portion 11L. On the other hand, a low-pitched speaker unit 8L for converting an audio signal into reproduced sound is attached.

  The low-frequency speaker unit 8L mainly emits low-frequency sounds by vibrating the diaphragm in response to an audio signal supplied from a portable CD player, DMP, or the like via a connection cable (not shown). Has been made.

  The cover portion 12L is attached to the hemispherical portion 11L, has a hemispherical shape having a space inside, and covers the front space of the bass speaker unit 8L. Further, the cover portion 12L is attached to the end portion of the surface thereof in a state of being penetrated by a tubular duct 9L made of metal and having a hollow member having a predetermined thickness bent in a substantially U-shaped side surface. .

  The tubular duct 9L has a U-shaped portion at the tip thereof bent toward the ear canal entrance 102L of the listener, and a hole 9AL is provided at substantially the center of the U-shaped portion.

  Therefore, in the ear speaker device 1, when the ear speaker device 1 is normally attached to the listener, the bass speaker unit 8L of the bass electroacoustic transducer 3L is positioned slightly above the front side of the ear canal entrance 102L, and the hole 9AL of the tubular duct 9L. Is positioned very close to the ear canal entrance 102L.

  In the tubular duct 9L, the hole 9AL is formed in the direction opposite to the ear canal entrance 102L. However, since the bass emitted from the hole 9AL is not directional, the bass sound is input to the listener's ear canal entrance 102L. On the other hand, the medium and high sounds radiated slightly from the hole 9AL can be reliably reached, because the hole 9AL faces in the opposite direction with respect to the ear canal entrance and the medium and high sounds have directivity. The listener can hardly reach the ear canal entrance 102L.

  Therefore, the ear speaker device 1 outputs the middle and high tone of the reproduced sound from the middle and high tone speaker unit 7L to reach the listener's ear canal entrance 102L, and only the reproduced sound's low sound from the hole 9AL of the tubular duct 9L. The medium and high sounds that slightly leak from the hole 9AL while reaching the inlet 102L are output in a state having directivity from the hole 9AL facing in the opposite direction to the listener's ear canal entrance 102L. The middle / high sound does not reach the listener's external auditory canal entrance 102L, and the sound image localization of the listener on which the middle / high sound mainly acts is not adversely affected.

  As a result, the ear speaker device 1 allows the listener to listen to a sufficient level of bass through the hole 9AL of the tubular duct 9L while giving a natural sound image localization to the middle / high tone output from the middle / high tone speaker unit 7L. Has been made to get.

  Incidentally, the position of the hole 9AL is not limited to this location, and may be any location on the tubular duct 9L as long as it faces in the opposite direction with respect to the listener's ear canal entrance.

  Further, the tubular duct 9L has a substantially U-shaped tip, so that it does not enter the listener's ear canal. As a result, the ear speaker device 1 can prevent the listener from accidentally damaging the ear canal by the tubular duct 9L when the ear speaker device 1 is mounted.

  Here, as shown in FIG. 2, the bass housing portion 6L of the bass electroacoustic conversion portion 3L is in a state where the bass speaker unit 8L is attached to the hemispherical portion 11L, and is covered by the cover portion 12L except for the tubular duct 9L. A sealed space is formed, and a resonance circuit is formed by the bass housing unit 6L and the tubular duct 9L with respect to the bass speaker unit 8L, and operates as a Kelton type speaker.

  In this low-tone electroacoustic conversion unit 3L, the listener's pinna 101 is not blocked, so the eardrum 103L of the listener is cut off without blocking the sound generated around the listener (hereinafter referred to as ambient sound). It is possible to allow the listener to listen to a sufficient level of bass by allowing the low tone of the reproduced sound to reach the ear canal entrance 102L directly from the hole 9AL of the tubular duct 9L.

  Incidentally, the tubular duct 9L has an inner diameter of, for example, 1.8 [mm], and the distance from the surface of the baffle plate 4AL to the hole 8AL of the tubular duct 9L is, for example, about 35 [mm]. Absent.

  Here, the tubular duct 9L has a substantially U-shaped side surface, and a hole 9AL is provided in the center of the U-shaped portion, so that it substantially constitutes two ducts having an upper half and a lower half. In consideration of the inner diameter (corresponding to about 2.5 [mm] in this case) when the tubular duct 9L is converted into one tubular duct, the inner diameter and The effective length has been determined.

  That is, the tubular duct 9L is formed in a U-shape on the side surface, so that the effective length can be set shorter than in the case of a single tubular duct, and the design and safety can be greatly improved. Has been made.

  As described above, in the ear speaker device 1, when attached to the listener's head 100, the middle / high tone speaker unit 7 </ b> L is positioned slightly away from the listener's external auditory canal entrance 102 </ b> L, The medium / high sound speaker unit 7L emits medium / high sound, and the sound is reproduced from the hole 9AL of the tubular duct 9L extended from the cover portion 12L of the bass electroacoustic conversion unit 3L to the vicinity of the external ear canal entrance 102L. By radiating the low-frequency sound, it is possible to make the listener listen to a good reproduction sound including a sufficient level of low-frequency sound while giving a natural sound image localization.

(1-2) Configuration Example of Other Ear Speaker Device in First Embodiment By the way, as shown in FIGS. 1 and 2, the ear speaker device 1 in the first embodiment is a mounting unit. The band portion 4 is adapted to attach the electroacoustic transducer 2L for middle and high sounds and the electroacoustic transducer 3L for bass to the listener's head 100. However, various other attachment portions can be used instead of the band portion 4. By using it, the electroacoustic transducer 2L for middle and high sounds and the electroacoustic transducer 3L for bass may be mounted on the listener's head 100.

  In the following, as in the case of the ear speaker device 1 described above, the left middle electroacoustic transducer 2L and the bass electroacoustic transducer 3L will be mainly described as an example.

  For example, the ear speaker device 20 shown in FIG. 3 is configured as a so-called under-chin type, and holds a bass electroacoustic conversion unit 3L instead of the band unit 4 in the ear speaker device 1 (FIGS. 1 and 2). At the same time, a band portion 24 for hooking on the listener's pinna 101L is used.

  This band portion 24 is formed in a substantially convex arch shape downward and is assumed to be passed to the left and right under the listener's jaw, and is substantially L-shaped extending from the middle of the band portion 24. The middle / high-tone electroacoustic transducer 2L is attached to the tip of the arm 24C.

  The ear speaker device 20 (FIG. 3) is configured such that the mid-high sound electroacoustic conversion unit 2L and the bass electroacoustic conversion unit 3L are connected to the listener's head by hooking the ear hooking portion 24BL of the band portion 24 onto the listener's pinna 101L. Similar to the ear speaker device 1, the listener can listen to a good reproduction sound including a sufficient level of low sound while providing a natural sound image localization.

  Further, the ear speaker device 30 shown in FIG. 4 is configured as a so-called shoulder hold type, and instead of the band portion 4 in the ear speaker device 1 (FIGS. 1 and 2), an electroacoustic transducer 2L for middle and high sounds and a bass sound are provided. A shoulder arm 34 is used that holds the electroacoustic transducer 3L and supports it from the shoulder of the listener.

  This shoulder arm 34 has a low-frequency electroacoustic conversion portion 3L attached to the tip thereof, and is an approximately L-shaped arm extending from the middle of a rod-like holding portion 34L suspended from the shoulder opening of the listener. The electroacoustic transducer 2L for middle and high tones is attached to the tip of 34C. Further, it is assumed that the central portion 34A of the shoulder arm 34 is formed in a substantially convex arch shape at the back, and is hooked on the upper part of the shoulder from the back of the listener's neck and passed to the left and right.

  The ear speaker device 30 (FIG. 4) can be attached to the listener's head 100 with the middle / high sound electroacoustic transducer 2L and the bass electroacoustic transducer 3L by being hooked over both shoulders of the listener. As with the ear speaker device 1, the listener can listen to good reproduction sounds including a sufficient level of bass while providing a natural sound image localization.

  Further, the ear speaker device 40 shown in FIG. 5 is configured as a so-called neckband type, and instead of the band portion 4 in the ear speaker device 1 (FIGS. 1 and 2), an electroacoustic transducer 2L for middle and high sounds and a bass sound are provided. A band 44 is used to hold the electroacoustic transducer 3L for use and to be hung on the listener's pinna 101L.

  The central portion 44A of the band portion 44 is formed in a substantially convex arch shape on the back and is assumed to be passed on the rear side of the listener's rear head 100, and the bass electroacoustic conversion portion 3L is provided at the tip of the band portion 44. Is attached, and the electroacoustic transducer 2L for middle and high sounds is attached to the tip end of an approximately L-shaped arm 44C extending from the middle of the band portion 44.

  The ear speaker device 40 (FIG. 5) is configured such that the mid-high sound electroacoustic transducer 2L and the bass electroacoustic transducer 3L are connected to the listener's head by hooking the ear hook portion 44BL of the band portion 44 to the listener's pinna 101L. Similar to the ear speaker device 1, the listener can listen to a good reproduction sound including a sufficient level of low sound while providing a natural sound image localization.

  As described above, according to the present invention, in addition to the band portion 4 (FIGS. 1 and 2) of the ear speaker device 1, the mounting portions having various methods such as the ear speaker devices 20 to 40 (FIGS. 3 to 5) are used. Alternatively, the middle / high-frequency electroacoustic transducer 2L and the bass electroacoustic transducer 3L may be attached to the listener's head 100.

(1-3) Operation and Effect in the First Embodiment In the above configuration, the ear speaker device 1 (FIGS. 1 and 2) is mounted on the listener's head 100, so that the middle / high-frequency electroacoustic is provided. The middle / high tone speaker unit 7L provided in the middle / high tone casing 5L of the conversion unit 2L is positioned at a predetermined distance from the listener's external auditory canal entrance 102L, and slightly above the front side of the listener's external auditory canal entrance 102L. In the state where the hole 9AL of the tubular duct 9L of the low-frequency electroacoustic transducer 3L located in the vicinity is positioned near the ear canal entrance 102L, the reproduced sound based on the audio signal supplied from a predetermined amplifier is output.

  As a result, the ear speaker device 1 reflects the middle / high tone output from the middle / high tone speaker unit 7L in front of the listener's external auditory canal entrance 102L by the listener's cheeks or auricle 101L. Since it can reach the eardrum 103L, the listener listens to the middle and high sounds similar in characteristics to listening to the reproduced sound through a general speaker, and the sound image is natural as if the sound image is located outside the head. A sense of orientation can be given.

  On the other hand, in the ear speaker device 1, the low sound output from the low sound speaker unit 8L of the low sound housing 6L can be directly reached to the ear canal entrance 102L through the tubular duct 9L. A sufficient level of bass can be heard in an open state without sealing.

  Further, the ear speaker device 1 does not increase the reproduction volume of the bass sound, but is sufficient for the eardrum 103L (FIG. 2) of the listener by bringing the hole 9AL of the tubular duct 9L, which is a bass emission port, close to the ear canal entrance 102L. Since the low sound is made to reach, for example, low sound and vibration leaking to the surroundings can be substantially eliminated as compared with a case where the low sound is reproduced using, for example, a large-diameter speaker or a subwoofer.

  Therefore, for example, when a listener listens to a reproduced sound through the ear speaker device 1 at midnight, a good reproduced sound including a sufficient level of low sound can be obtained without worrying about inconvenience to the vicinity and surroundings. You can enjoy it.

  The tubular duct 9L has a U-shaped tip and does not block the listener's ear canal entrance 102L. Therefore, the tubular duct 9L blocks the reproduced sound and the ambient sound generated around the listener. The eardrum 103L can be reached without being heard.

  Thereby, in the ear speaker device 1, when the listener needs to listen to the ambient sound, such as when the listener walks or plays sports, it is possible to reliably hear the ambient sound in addition to the good reproduction sound. it can.

  In addition, the ear speaker device 1 does not cover the listener's pinna 101L or the like with the middle / high sound housing portion 5L for the middle / high sound electroacoustic conversion unit 2L, unlike the conventional sealed headphones. There is no discomfort such as obstruction or stuffiness that listeners wearing headphones feel. Furthermore, since the ear speaker device 1 does not form a sealed space, the resonance frequency in the ear canal, which may occur when sealed headphones are used, does not occur, and the listener does not feel uncomfortable.

  In addition, since the ear speaker device 1 allows the listener to listen to a low sound of a sufficient volume level by bringing the hole 9AL of the tubular duct 9L, which is a low-frequency radiating port, close to the eardrum 103L, the diameter of the low-frequency speaker unit 8L can be reduced. There is no need to make it as large as necessary, and the size of the bass housing portion 6L can be minimized. As a result, in the ear speaker device 1, the overall size and weight can be minimized, so that troublesomeness due to the size and weight when the listener wears the ear speaker device 1 can be minimized.

  Further, the ear speaker device 1 has the central portion 4A of the band portion 4 in the vicinity of the top of the head 100, and the middle / high tone electroacoustic transducer 2L and the bass electroacoustic transducer 3L are arranged at separate positions. In addition, it is possible to balance the weight balance between the middle and high tone electroacoustic transducer 2L and the bass electroacoustic transducer 3L, thus improving the stability when the head 100 is worn and improving the feeling of wearing. .

  According to the above configuration, when the ear speaker device 1 is attached to the listener's head 100, the middle / high tone speaker unit 7L is slightly forward of the middle ear / high tone speaker unit 7L from the listener's ear canal entrance 102L. And a reproduced sound in a state where the hole 9AL of the tubular duct 9L of the electroacoustic transducer 3L for bass is positioned in the vicinity of the external ear canal entrance 102L. While providing stability, it is possible to provide a natural and three-dimensional sound image localization, and to allow the listener to listen to high-quality reproduced sound.

(2) Second Embodiment (2-1) Configuration of Ear Speaker Device in Second Embodiment In FIG. 6, in which parts corresponding to those in FIG. The ear speaker device in the above embodiment is configured to convert an audio signal generated by a portable CD player, a DMP playback process, or the like into a playback sound and listen to it by a listener.

  Incidentally, even in the ear speaker device 200 (FIG. 6) in this case, only the part visible from the left side of the listener is displayed and the part visible from the right side of the listener is not displayed, but both are the same left and right sides. Symmetric structure.

  The ear speaker device 200 is different from a general box-shaped speaker device, and is presumed to be mounted on the listener's head 100 in the same manner as the headphone device. The ear speaker device 200 converts an audio signal into a reproduced sound and reproduces it. Electroacoustic converter 2L for middle and high sounds that mainly outputs middle and high sounds among the sounds, electroacoustic converter 50L for rear middle and high sounds, electroacoustic converter 3L for low sounds that mainly outputs low sounds among the reproduced sounds, and It comprises a band part 204 for mounting and fixing the electroacoustic conversion part 2L for middle and high sounds, the electroacoustic conversion part 50L for rear middle and high sounds and the electroacoustic conversion part 3L for low sounds to the head of the listener.

  That is, in the ear speaker device 200, the electroacoustic transducer 2L for middle and high sounds, the electroacoustic transducer 50L for rear middle and treble and the electroacoustic transducer 3L for bass are arranged on the left side of the listener via the band 204, and the band 4 An electroacoustic transducer 2R for middle and high sounds (not shown), an electroacoustic transducer 50R for rear middle and high tones (not shown), and an electroacoustic transducer 3R for bass (not shown) are arranged on the right side of the listener. Therefore, 4.2ch headphones are configured on the left and right.

  The band portion 204 is formed in an approximately arch shape that is convex upward in accordance with the shape of a general human head 100 around the central portion 4A, and slides freely with respect to the central portion 4A. The length of the entire band portion 204 can be adjusted by the adjustable portion 4BL.

  The band portion 204 has a middle / high-frequency electroacoustic transducer 2L attached to the tip of an approximately L-shaped arm 4C extending forward from the middle of the adjusting portion 4BL, and from the middle of the adjusting portion 4BL to the rear. A rear middle / high / high-frequency electroacoustic transducer 50L is attached to the distal end of the substantially L-shaped arm 204D, and a low-frequency electroacoustic transducer 3L is attached to the distal end of the adjuster 4BL. ing.

  The band portion 204 is formed in an arch shape having a diameter smaller than the shape of the general human head 100 and has an elastic force, and the listener's head is expanded while expanding the electroacoustic conversion portion 3L for bass. When attached to the part 100, the band part 4 tries to return to its original shape by the action of the elastic force, so that the middle / high sound electroacoustic converter 2L, the rear middle / high sound electroacoustic converter 50L and the bass electroacoustic converter The portion 3L is held in contact with the listener's head 100.

  As a result, in the ear speaker device 200, the middle / high-tone electroacoustic transducer 2L is positioned at a predetermined distance away from the listener's ear, and the rear middle / high-pitched electroacoustic transducer 50L is rearward from the listener's ear. The bass electroacoustic converter 3L is positioned slightly above the front side of the listener's auricle 101L.

  The electroacoustic transducer 2L for middle / high sounds is a middle / high tone casing 5L shaped like a sphere divided into two halves in the vertical direction, and the baffle plate 2AL which is a plane portion of the middle / high pitch casing 5L. Are attached to the rear external auditory canal entrance 102L, which is a speaker unit 7L for middle and high sounds for converting an audio signal into reproduced sound.

  The middle / high tone speaker unit 7L emits sound by vibrating the diaphragm in accordance with an audio signal supplied from a portable CD player, DMP or the like via a connection cable (not shown). .

  The rear middle / high-pitched electroacoustic conversion unit 50L is formed of a rear middle / high-pitched sound casing 51L having a shape in which a sphere is divided into two equal parts in the vertical direction, like the middle / high-pitched electroacoustic conversion unit 2L. On the baffle plate 50AL, which is a flat surface portion of the middle / high tone casing 51L, a rear middle / high tone speaker unit 53L that converts an audio signal into reproduced sound is attached toward the front pinna 101L.

  The rear middle / high tone speaker unit 53L emits sound by vibrating the diaphragm in accordance with an audio signal supplied from a portable CD player, DMP or the like via a connection cable (not shown). Yes.

  As a result, the mid-high sound electroacoustic conversion unit 2L and the rear middle / high sound electroacoustic conversion unit 50L of the ear speaker device 200 listen to the middle / high sounds radiated from the middle / high sound speaker unit 7L and the rear middle / high sound speaker unit 53L, respectively. And the reflected sound reflected by the listener's cheek, pinna 101L, etc. can reach the ear canal entrance 102L, so that it can be heard through a general stationary speaker. The same natural and more three-dimensional sound image localization can be provided.

  On the other hand, the bass electroacoustic conversion unit 3L is a bass housing unit 6L having a substantially spherical shape as a whole, and a bass speaker unit 8L is provided inside the bass housing unit 6L. The bass housing portion 6L is divided into an upper hemispherical portion 11L and a lower cover portion 12L with the bass speaker unit 8L as a boundary, and is arranged on the baffle plate 13L of the hemispherical portion 11L. On the other hand, a low-pitched speaker unit 8L for converting an audio signal into reproduced sound is attached.

  The low-frequency speaker unit 8L mainly emits low-frequency sounds by vibrating the diaphragm in response to an audio signal supplied from a portable CD player, DMP, or the like via a connection cable (not shown). Has been made.

  The cover portion 12L is attached to the hemispherical portion 11L, has a hemispherical shape having a space inside thereof, and covers the front space of the bass speaker unit 8L. The cover portion 12L is made of metal, and is attached in a state where a tubular duct 9L obtained by bending a hollow member having a predetermined thickness into a substantially U-shaped side surface penetrates the end portion of the surface of the cover portion 12L. It has been.

  The tubular duct 9L has a U-shaped portion at the tip thereof bent toward the ear canal entrance 102L of the listener, and a hole 9AL is provided at substantially the center of the U-shaped portion.

  Therefore, in the ear speaker device 200, when normally attached to the listener, the bass speaker unit 8L of the bass electroacoustic converter 3L is positioned slightly above the front side of the ear canal entrance 102L, and the hole 9AL of the tubular duct 9L. Is positioned very close to the ear canal entrance 102L.

  In the tubular duct 9L, the hole 9AL is formed in the direction opposite to the ear canal entrance 102L. However, since the bass emitted from the hole 9AL is not directional, the bass sound is input to the listener's ear canal entrance 102L. On the other hand, the medium and high sounds radiated slightly from the hole 9AL can be reliably reached, because the hole 9AL faces in the opposite direction with respect to the ear canal entrance and the medium and high sounds have directivity. The listener can hardly reach the ear canal entrance 102L.

  Therefore, in the ear speaker device 200, the medium / high sound of the reproduced sound is output from the middle / high sound speaker unit 7L and the rear middle / high sound speaker unit 53L to reach the listener's external auditory canal entrance 102L and reproduced from the hole 9AL of the tubular duct 9L. While only the low sound of the sound reaches the listener's ear canal entrance 102L, the middle and high sounds that leak slightly from the hole 9AL have directivity from the hole 9AL facing in the opposite direction to the listener's ear canal entrance 102L. Therefore, the leaked medium / high sound does not reach the listener's ear canal entrance 102L, and the medium / high sound slightly leaking from the hole 9AL does not adversely affect the three-dimensional sound image localization of the listener. Has been made.

  As a result, the ear speaker device 200 provides a sufficient level of sound through the hole 9AL of the tubular duct 9L while giving a natural sound image localization to the medium and high sounds output from the middle and high sound speaker unit 7L and the rear middle and high sound speaker unit 53L. The bass can be heard by the listener.

  Incidentally, the position of the hole 9AL is not limited to this location, and may be any location on the tubular duct 9L as long as it faces in the opposite direction with respect to the listener's ear canal entrance.

  Since the tubular duct 9L has a substantially U-shaped tip, the tubular duct 9L is prevented from entering the ear canal of the listener. Accordingly, the ear speaker device 200 can prevent the listener from accidentally damaging the ear canal by the tubular duct 9L when the ear speaker device 200 is mounted.

  Further, the bass housing portion 6L of the bass electroacoustic conversion portion 3L forms a space sealed by the cover portion 12L except for the tubular duct 9L in a state where the bass speaker unit 8L is attached to the hemispherical portion 11L. In addition, a resonance circuit is formed by the bass housing unit 6L and the tubular duct 9L with respect to the bass speaker unit 8L, and operates as a kelton speaker.

  In this low-tone electroacoustic conversion unit 3L, the listener's pinna 101 is not blocked, so the eardrum 103L of the listener is cut off without blocking the sound generated around the listener (hereinafter referred to as ambient sound). It is possible to allow the listener to listen to a sufficient level of bass by allowing the low tone of the reproduced sound to reach the ear canal entrance 102L directly from the hole 9AL of the tubular duct 9L.

  Incidentally, the tubular duct 9L has an inner diameter of, for example, 1.8 [mm], and the distance from the surface of the baffle plate 4AL to the hole 8AL of the tubular duct 9L is, for example, about 35 [mm]. Absent.

  Here, since the tubular duct 9L is provided with a hole 9AL at the center of the U-shaped portion, it is substantially the same as the two ducts formed by the upper half and the lower half. The inner diameter and the effective length are determined after taking into consideration the inner diameter (corresponding to about 2.5 [mm] in this case) when the duct 9L is converted into one tubular duct.

  That is, the tubular duct 9L is formed in a U-shape on the side surface, so that the effective length can be set shorter than in the case of a single tubular duct, and the design and safety can be greatly improved. Has been made.

  As described above, in the ear speaker device 200, when the earphone device 100 is attached to the listener's head 100, the middle / high tone speaker unit 7L is positioned at a position slightly away from the ear canal entrance 102L of the listener. The middle / high tone speaker unit 7L radiates the reproduced middle / high pitch sound, and the rear middle / high tone speaker unit 53L of the rear middle / high tone electroacoustic converter 50L is located slightly away from the listener's ear canal entrance 102L. The hole of the tubular duct 9L that is positioned at the rear, radiates the mid-high sound of the reproduced sound from the rear middle-high sound speaker unit 53L, and extends from the cover part 12L of the bass electroacoustic conversion part 3L to the vicinity of the external auditory canal entrance 102L. By radiating the low tone of the playback sound from 9AL, it is possible to achieve a sufficient level while giving a natural and more three-dimensional sound image localization. Good reproduced sound and a sound have been made so as to listen to the listener.

(2-2) Configuration Example of Other Ear Speaker Device in Second Embodiment As shown in FIG. 6, the ear speaker device 200 in the second embodiment includes a band unit 204 as a mounting unit. Thus, the middle / high-tone electroacoustic transducer 2L, the rear middle / high-pitched electroacoustic transducer 50L, and the low-pitched electroacoustic transducer 3L are attached to the listener's head 100. By using other various mounting parts, the middle / high-tone electroacoustic conversion unit 2L, the rear middle / high-pitched electroacoustic conversion unit 50L, and the low-pitched electroacoustic conversion unit 3L may be mounted on the listener's head 100. .

  In the following description, as in the case of the ear speaker device 200 described above, the left middle / high tone electroacoustic transducer 2L, the rear middle / high tone electroacoustic transducer 50L, and the bass electroacoustic transducer 3L are mainly described as examples. However, the right middle / high tone electroacoustic transducer 2R (not shown), the rear middle / high tone electroacoustic transducer 50R (not shown) and the bass electroacoustic transducer 3R (not shown) It is assumed that the left middle / high pitch electroacoustic transducer 2L, the rear middle / high pitch electroacoustic transducer 50L, and the bass electroacoustic transducer 3L are configured symmetrically.

  For example, as shown in FIG. 7 in which parts corresponding to those in FIG. 3 are denoted by the same reference numerals, the ear speaker device 220 (FIG. 7) in the second embodiment is configured as a so-called under-chin type. Instead of the band unit 204 in the device 200 (FIG. 6), the middle / high tone electroacoustic transducer 2L, the rear middle / high tone electroacoustic transducer 50L, and the bass electroacoustic transducer 3L are held, and the listener's auricle 101L is provided. A band part 224 for hooking is used.

  This band portion 224 is formed in a substantially convex arch shape that is downwardly convex, and is assumed to be passed to the left and right under the listener's jaw, and is substantially L-shaped extending forward from the middle of the band portion 224. An electroacoustic transducer 2L for middle and high sounds is attached to the tip of the arm 24C having a shape, and a rear middle and treble electroacoustic is attached to the tip of the substantially L-shaped arm 224D extending from the middle of the band portion 224 to the rear. The low-frequency electroacoustic conversion unit 3L is attached to the band unit 224 so that the conversion unit 50L is attached and the listener's pinna 101L is positioned slightly above the front side.

  This ear speaker device 220 (FIG. 7) is configured such that the ear-hanging portion 24BL of the band portion 224 is hooked on the listener's pinna 101L, so that the middle-high sound electroacoustic conversion portion 2L, the rear middle-high-tone electroacoustic conversion portion 50L, The electroacoustic conversion unit 3L can be mounted on the listener's head 100, and as with the ear speaker device 200, a good reproduced sound including a low level of sufficient sound is provided while providing a natural and more three-dimensional sound image localization. The listener can be listened to.

  Also in the ear speaker device 220 (FIG. 7) in this case, mainly the low sound radiated from the low-frequency speaker unit 8L can be directly reached to the listener's ear canal entrance 102L via the cover portion 12L and the tubular duct 9L. For this reason, it is possible to reduce the sound leakage of a bass sound as compared with the case of listening through a general stationary speaker.

  Further, as shown in FIG. 8 in which the same reference numerals are given to corresponding parts to FIG. 4, the ear speaker device 230 is configured as a so-called shoulder hold type, and the band portion 204 in the ear speaker device 200 (FIG. 6) Instead, a shoulder arm 234 that holds the middle / high-tone electroacoustic transducer 2L, the rear middle / high-pitched electroacoustic transducer 50L, and the low-pitched electroacoustic transducer 3L and supports it from the shoulder of the listener is used.

  The shoulder arm 234 has a low-frequency electroacoustic conversion portion 3L attached to the tip thereof, and has a substantially L-shape extending forward from the middle of a rod-shaped holding portion 34L suspended from the shoulder opening of the listener. The middle / high pitch electroacoustic transducer 2L is attached to the tip of the arm 34C, and the rear middle / high pitch electroacoustic transducer 50L is attached to the tip of the substantially L-shaped arm 234D that extends backward from the middle of the holding portion 34L. Is attached. Further, it is assumed that the central portion 34A of the shoulder arm 234 is formed in a substantially convex arch shape at the back, and is hooked on the upper part of the shoulder from the back of the listener's neck and passed to the left and right.

  The ear speaker device 230 (FIG. 8) is hooked over both shoulders of the listener, whereby the middle / high sound electroacoustic conversion unit 2L, the rear middle / high sound electroacoustic conversion unit 50L, and the bass electroacoustic conversion unit 3L are connected to the listener. In the same manner as the ear speaker device 200, the listener can listen to good reproduction sound including a sufficient level of bass while providing a natural and more three-dimensional sound image localization. Has been made.

  Further, as shown in FIG. 9 in which the same reference numerals are given to corresponding parts to FIG. 5, the ear speaker device 240 is configured as a so-called neckband type, and the band portion 204 in the ear speaker device 200 (FIG. 6) Instead, a band unit 244 is used to hold the middle / high pitch electroacoustic transducer 2L, the rear middle / high pitch electroacoustic transducer 50L, and the bass bass electroacoustic transducer 3L and hang it on the listener's auricle 101L. .

  The central portion 44A of the band portion 244 is formed in a substantially convex arch shape on the back, and is assumed to be passed on the rear side of the rear head 100 of the listener, and is substantially extended from the middle of the band portion 244 to the front. The middle / high-frequency electroacoustic transducer 2L is attached to the tip of the L-shaped arm 44C, and the rear middle / high-pitched sound is attached to the tip of the substantially L-shaped arm 244D that extends backward from the middle of the band 244. The electroacoustic transducer 50L is attached.

  The ear speaker device 240 (FIG. 9) is configured such that the ear-hanging portion 44BL of the band portion 244 is hooked on the listener's pinna 101L, whereby the middle / high-tone electroacoustic conversion portion 2L, the rear middle-high-pitched electroacoustic conversion portion 50L, and the bass. The electroacoustic conversion unit 3L can be mounted on the listener's head 100, and as with the ear speaker device 200, a good reproduced sound including a low level of sufficient sound is provided while providing a natural and more three-dimensional sound image localization. The listener can be listened to.

  As described above, according to the present invention, in addition to the band portion 204 (FIG. 6) of the ear speaker device 200, the mounting portions of various methods used in the ear speaker devices 220 to 240 (FIG. 7 to FIG. 9) The electroacoustic transducer 2L for middle and high sounds, the electroacoustic transducer 50L for rear middle and high tones, and the electroacoustic transducer 3L for bass may be attached to the listener's head 100.

(2-3) Operation and Effect in Second Embodiment In the above configuration, the ear speaker device 200 is mounted on the listener's head 100, so that the medium / high sound electroacoustic conversion unit 2L is used for medium / high sound. The middle / high tone speaker unit 7L provided in the casing 5L is positioned at a predetermined distance forward from the external ear canal entrance 102L of the listener, and the rear middle / high tone electroacoustic conversion unit 50L is rearward. The speaker unit 53L for rear middle and high sounds provided on the body 51L is positioned at a position away from the outer ear canal entrance 102L of the listener by a predetermined distance and is located slightly above the listener's ear canal entrance 102L. Supplied from a predetermined amplifier with the hole 9AL of the tubular duct 9L of the electroacoustic transducer 3L positioned near the ear canal entrance 102L The playback sound based on the audio signal is output.

  As a result, the ear speaker device 200 reflects the middle / high tone output from the middle / high tone speaker unit 7L in front of the listener's external auditory canal entrance 102L by the listener's cheek, auricle 101L, and the like. The eardrum 103L is caused to reach the eardrum 103L, and the middle and high tones output from the rear middle / highsound speaker unit 53L of the rear middle / highsound casing 51L behind the listener's ear canal entrance 102L are reflected by the listener's ears 101L and the like. 103L can be reached, so that the listener listens to the middle and high sounds similar to those when listening to the playback sound through a general speaker, and the sound image is natural and the sound image is located outside the head. A more three-dimensional orientation can be given.

  On the other hand, in the ear speaker device 200, the low sound output from the low sound speaker unit 8L of the low sound housing 6L can be directly reached to the ear canal entrance 102L through the tubular duct 9L. A sufficient level of bass can be heard in an open state without being sealed.

  In addition, the ear speaker device 200 does not increase the volume of low-pitched sound reproduction, but by approaching the hole 9AL of the tubular duct 9L, which is a low-frequency emission port, close to the external ear canal entrance 102L, sufficient low sound can be reached at the listener's external ear canal entrance 102L. Therefore, compared to the case where bass is reproduced using, for example, a large-diameter speaker or a subwoofer, bass and vibration leaking to the surroundings can be substantially eliminated.

  Therefore, for example, when the listener listens to the reproduced sound through the ear speaker device 200 at midnight, the user can enjoy a satisfactory reproduced sound including a sufficient bass without almost bothering neighbors and surroundings. be able to.

  The tubular duct 9L has a U-shaped tip and does not block the listener's ear canal entrance 102L. Therefore, the eardrum is not cut off from the reproduced sound and the ambient sound generated around the listener. 103L can be reached for listening.

  Thereby, in the ear speaker device 200, when the listener needs to listen to the ambient sound, such as when the listener walks or performs sports, it is possible to reliably hear the ambient sound in addition to the good reproduction sound. it can.

  In addition, the ear speaker device 200 includes a listener's pinna 101L and the like, as in a conventional sealed type headphone, and the middle / high sound electroacoustic conversion unit 2L, the middle / high sound case 5L, and the rear middle / high sound electroacoustic conversion unit 50L. Since it is not covered by the rear middle and high tone casing 51L, there is no discomfort such as a feeling of obstruction or stuffiness that a listener wearing a sealed headphone feels. Furthermore, since the ear speaker device 200 does not form a sealed space, the resonance frequency in the ear canal, which may occur when using sealed headphones, does not occur, and the listener does not feel uncomfortable.

  In addition, since the ear speaker device 200 allows the listener to listen to a low sound of a sufficient volume level by bringing the hole 9AL of the tubular duct 9L, which is a low-frequency radiating port, close to the eardrum 103L, the diameter of the low-frequency speaker unit 8L can be reduced. There is no need to make it as large as necessary, and the size of the bass housing portion 6L can be minimized. As a result, the size and weight of the entire ear speaker device 200 can be minimized, so that troublesomeness caused by the size and weight of the listener when the ear speaker device 200 is mounted can be minimized.

  Further, the ear speaker device 200 has the central portion 4A of the band portion 204 disposed near the top of the head 100, and the electroacoustic transducer 2L for middle and high sounds, the electroacoustic transducer 50L for rear middle and high tones, and the electroacoustic transducer for bass. By arranging 3L in three directions, it is possible to optimally balance the weight balance between the electroacoustic transducer 2L for middle and high sounds, the electroacoustic transducer 50L for rear middle and high tones, and the electroacoustic transducer 3L for bass. Thus, the stability at the time of wearing the head 100 can be further improved, and the wearing feeling can be further improved.

  According to the above configuration, when the ear speaker device 200 is attached to the listener's head 100, the middle / high tone speaker unit 7L for the middle / high tone electroacoustic transducer 2L is slightly forward of the listener's ear canal entrance 102L. And the rear middle / high tone speaker unit 53L of the rear middle / high pitch electroacoustic converter 50L is located at a location a predetermined distance behind the listener's ear canal entrance 102L, and The reproduced sound is output in a state where the hole 9AL of the tubular duct 9L of the electroacoustic transducer 3L for bass is positioned in the vicinity of the ear canal entrance 102L. It is possible to give a realistic sound image localization and to allow the listener to listen to high-quality reproduced sound.

(3) Other Embodiments In the first and second embodiments described above, the tubular duct 9L of the bass electroacoustic transducer 3L is formed as a two-sided structure having a substantially U-shaped side surface. However, the present invention is not limited to this, and the tubular duct 9L may be configured by one or three or more tubular ducts.

  For example, as shown in FIG. 10, in the bass electroacoustic transducer 3L, one tubular duct 58L may be extended downward from the bass casing 6L, and the tip of the tubular duct 58L is further extended. The protective part 59L for not damaging the listener's ear canal entrance 102L may be attached to the part. In this case, the protector 59L is made of a sponge-like member or the like that allows sound to pass through, so that the listener can listen to the sound without blocking the ambient sound.

  In the first and second embodiments, the case where the tubular duct 9L formed of a hard material such as metal is used has been described. However, the present invention is not limited to this, and a flexible resin is used. A tubular duct 9L formed of a soft material such as may be used.

  Further, in the first and second embodiments, the case where the tubular duct 9L is provided so as to penetrate the end portion of the surface of the cover portion 12L of the bass housing portion 6L has been described. Not limited to this, the tubular duct 9L may be provided so as to penetrate other portions of the surface of the cover portion 12L.

  Further, in the first and second embodiments, when the ear speaker device 1 and the ear speaker device 200 are attached to the head 100 (FIGS. 1 and 6) of the listener, Although the case where the sound emitting surface of the high-pitched speaker unit 7L is directed substantially rearward has been described, the present invention is not limited to this. For example, the sound emitting surface of the medium-high sound speaker unit 7L is slightly directed inward. In short, the sound emitting surface of the middle / high tone speaker unit 7L may be oriented in the direction of the external auditory canal entrance 102L so that the radiating middle / high sounds can efficiently reach the external auditory canal entrance 102L.

  Furthermore, in the second embodiment, when the ear speaker device 200 is mounted on the listener's head 100 (FIG. 6), the sound emitting surface of the rear middle / high sound speaker unit 53L of the rear middle / high sound housing portion 51L. However, the present invention is not limited to this, and for example, the sound emitting surface of the rear middle / high sound speaker unit 51L may be directed slightly inward. It is only necessary that the sound emitting surface of the middle / high tone speaker unit 51L is directed in the direction of the external auditory canal entrance 102L of the ear floor 101 so that the radiating middle / high sounds can efficiently reach the ear canal entrance 102L.

  Further, in the first embodiment, the ear speaker device 1 includes the middle / high tone electroacoustic conversion unit 2L and the low tone electroacoustic conversion unit 3L only on the left side of the listener. Although a case has been described in which the reproduction sound of 2.2 channels is output on the left and right sides by having the conversion unit 2R (not shown) and the bass electroacoustic conversion unit 3R (not shown), the present invention is not limited to this. For example, only the left middle electro-acoustic transducer 2L and the bass electro-acoustic transducer 3L may be provided, and 1.1 channel reproduced sound may be output.

  Further, in the second embodiment, the ear speaker device 200 includes the middle / high-tone electroacoustic conversion unit 2L, the rear middle / high-tone electroacoustic conversion unit 50L, and the low-pitched electroacoustic conversion unit 3L only on the left side of the listener, The right and left sides of the listener also have a middle / high pitch electroacoustic transducer 2R (not shown), a rear middle / high pitch electroacoustic transducer 50R (not shown) and a bass bass electroacoustic transducer 3R (not shown). Although the case where 4.2 channel reproduced sound is output on the left and right sides has been described, the present invention is not limited to this. For example, the left middle / high tone electroacoustic transducer 2L, the rear middle / high tone electroacoustic transducer 50L, for example. In addition, only the bass electroacoustic conversion unit 3L may be provided, and 2.1 channel reproduced sound may be output.

  Further, in the first and second embodiments, the middle / high tone speaker unit 7L is provided in the middle / high tone casing portion 5L, and the rear middle / high tone speaker unit 53L is provided in the rear middle / high tone casing portion 51L. Although the present invention is not limited to this, the present invention is not limited to this. For example, two speaker units for medium sound and high sound are provided in one middle / high sound housing part 5L and rear middle / high sound housing part 51L to provide two ways. A plurality of speaker units, such as speakers, may be provided in the middle / high sound housing portion 5L and the rear middle / high sound housing portion 51L.

  Further, in the first and second embodiments, the case where the middle and high tone casing portion 5L and the rear middle and high tone casing portion 51L having a shape obtained by dividing the sphere into two equal parts in the vertical direction are used. As described above, the present invention is not limited to this, and may have various shapes such as a cubic shape and a cylindrical shape. In short, it has a substantially sealed space that can function as a speaker enclosure. It should be.

  Further, in the first and second embodiments, the case where the cover portion 12L in which the edge is left at the end portions of the inner end portions 9BL1 and 9BL2 of the tubular duct 9L (FIG. 2) is used has been described. However, the present invention is not limited to this, and a cover portion 12L in which R-shaped roundness is formed on the end portions of the inner end portions 9BL1 and 9BL2 of the tubular duct 9L may be used. In this case, in the cover portion 12L, the air pushed out from the front surface of the bass speaker unit 8L does not hit the edge to generate a wind noise, and only low noise without noise is emitted from the hole 9AL of the tubular duct 9L. can do.

  Furthermore, in the first and second embodiments, the duct length from the hole 9AL to the inner end 9BL1 (FIG. 2) and the length from the hole 9AL to the inner end 9BL2 (FIG. 2) are the same. Although the case where the set tubular duct 9L is used has been described, the present invention is not limited to this, and tubular ducts having different lengths may be used.

  For example, in the bass casing 6L provided with a tubular duct having a different length from the hole 9AL to the inner end 9BL1 and a length from the hole 9AL to the inner end 9BL2, two ducts having different lengths are provided. The resonance characteristics are out of phase with each other, and as a result, the frequency components in the middle and high frequencies slightly output from the hole 9AL also cancel each other, and the low and high frequencies are canceled out from the hole 9AL of the tubular duct. It can only radiate.

  Further, in the first and second embodiments, the case where the hemispherical cover portion 12L is used has been described. However, the present invention is not limited to this, and for example, a shape such as a quadrangular pyramid or a triangular pyramid is used. In short, any structure that collects bass sounds output from the bass speaker unit 8L and does not leak outside may be used.

  Furthermore, in the first and second embodiments, the case where the bass housing portion 6L provided with the hemispherical portion 11L having a structure in which the rear portion of the bass speaker unit 8L is closed has been described. The present invention is not limited to this, and as shown in FIG. 11, the through holes 305 to 308 are formed at the rear of the low-frequency speaker unit 8 </ b> L, and the through holes 305 to 308 are made of a sponge or the like that closes from the inside. You may make it use the housing | casing part 303L for low sounds which has the hemispherical part 311L to which the acoustic resistor 309 was attached.

  In the bass housing portion 303L (FIG. 11) in this case, the rear side of the bass speaker unit 8L is opened by the through holes 305 to 308, so that the diaphragm of the bass speaker unit 8L follows the audio signal. In addition, since the acoustic resistor 309 can prevent deterioration in sound quality due to the formation of the through holes 305 to 308, high sound quality bass can be emitted from the hole 9AL of the tubular duct 9L.

  Incidentally, the acoustic resistor 309 is not necessarily required in the bass housing portion 303L (FIG. 11), and the acoustic resistor 309 is attached and the length and thickness thereof are changed as necessary. It is possible to adjust the sound quality by attaching.

  Furthermore, in the first and second embodiments, the case where the bass housing portion 6L provided with the hemispherical portion 11L having a structure in which the rear portion of the bass speaker unit 8L is closed has been described. The present invention is not limited to this, and as shown in FIG. 12, through holes 405 to 407 are formed in the cover portion 410L in front of the bass speaker unit 8L, and the through holes 405 to 407 are closed from the inside. A bass housing portion 411L to which acoustic resistors 408 and 409 made of a sponge or the like are attached may be used.

  In the bass housing portion 411L (FIG. 12) in this case, the diaphragm of the bass speaker unit 8L follows the audio signal when the front side of the bass speaker unit 8L is opened by the through holes 405 to 407. In addition, since the acoustic resistors 408 and 409 can prevent deterioration in sound quality due to the formation of the through holes 405 to 407, it is possible to radiate high-quality low sound from the hole 9AL of the tubular duct 9L. it can.

  Incidentally, the acoustic resistors 408 and 409 are not necessarily required in the bass housing portion 411L (FIG. 12), and the acoustic resistors 408 and 409 are attached as necessary, and the length and thickness thereof. It is possible to adjust the sound quality by attaching a modified version.

  Further, in the first and second embodiments, the case where the bass housing portion 6L in which the tubular duct 9L is provided on the surface of the cover portion 12L is used has been described, but the present invention is not limited thereto. As shown in FIG. 13, a bass housing portion 511L in which a tubular duct 9L is provided on the baffle plate 13L of the hemispherical portion 11L may be used.

  In this case, the bass housing portion 511L (FIG. 13) can radiate only the bass in the predetermined frequency band generated behind the bass speaker unit 8L through the hole 9AL of the tubular duct 9L.

  Further, in the first and second embodiments, the case where the bass housing portion 6L in which the tubular duct 9L is provided on the surface of the cover portion 12L is used has been described, but the present invention is not limited thereto. As shown in FIG. 14, a bass housing portion 521L in which a tubular duct 509L is integrally provided on the surface of the hemispherical portion 522L may be used.

  Also in this case, the bass housing portion 521L (FIG. 14) has the same structure as a so-called kelton type speaker device, and only the bass in the predetermined frequency band from the rear of the bass speaker unit 8L is transferred to the tubular duct. It can be radiated through a hole 509AL of 509L.

  Further, in the first and second embodiments, the case where the tubular duct 9L is integrally attached to the bass housing portion 6L has been described. However, the present invention is not limited to this, and FIG. 15, the fitting portion 525LBS formed on the cover portion 528L and the holding portion 529LS formed on one side of the tubular duct 529L are fitted to each other, so that the tubular duct 529L is attached to the cover portion 528L. You may make it use the housing | casing part 531L for low sounds of the structure provided detachably.

  As a result, the bass casing 531L is used with the tubular duct 529L attached only when necessary for the listener, and is used with the tubular duct 529L removed when unnecessary for the listener. Therefore, the listener usability can be greatly improved.

  Further, in the first and second embodiments, the bass housing portion 6 (FIG. 2) inside the cover portion 12L and having the edges remaining in the inner end portions 9BL1 and 9BL2 of the tubular duct 9L. Although the case where it was made to use was described, this invention is not restricted to this, and as shown in FIG. 16, it is inside the cover part 558L, Comprising: The root part of the tubular duct 569L provided integrally with the said cover part 558L is shown. A bass housing portion 551L in which an R-shaped round portion 570 is formed may be used.

  In the bass housing portion 551L, the air pushed out from the front side of the bass speaker unit 8L does not hit the edge to generate wind noise, and only the high-quality bass sound is passed through the hole 569AL of the tubular duct 569L. Can radiate from.

  Further, in the first and second embodiments, the case where the bass electroacoustic transducer 3L is arranged above the front side of the auricle 101 has been described. However, the present invention is not limited to this, and FIG. As shown, a bass electroacoustic transducer 700 having a hemispherical shape may be attached to the central portion 4A of the band 4.

  In this case, in the ear speaker device 800 (FIG. 17), the bass corresponding to the bass component of the audio signal can be radiated from the bass electroacoustic transducer 700 disposed on the top of the listener's head 100. 4.1ch headphones can be realized by the electroacoustic transducers 2L and 2R for middle and high sounds, the rear middle and treble electroacoustic transducers 50L and 50R, and the electroacoustic transducer 700 for bass.

  Further, in the first and second embodiments, the case where the bass housing portion 6L formed with the tubular duct 9L integrated with the surface of the cover portion 12L is used has been described. However, the tubular duct formed into a thin tubular shape as it goes to the front end in a shape that wraps the front side of the low-frequency speaker unit 8L without distinguishing between the cover portion 12L and the tubular duct 9L. You may make it use the housing | casing part for low sounds of the structure attached to the board 13L.

  Further, in the first and second embodiments, the medium and high tone electroacoustic converters 2L and 50L as the first housing part, the medium and high sound speaker unit 7L as the middle and high sound speaker unit, and the rear middle and high sound The ear speaker device includes the speaker unit 53L, the band portions 4 and 204 as the mounting portions, the bass electroacoustic converter 3L as the second housing portion, and the bass speaker unit 8L as the bass speaker unit. Although the case where the ear speaker devices 1 and 200 are configured has been described, the present invention is not limited to this, and the first casing unit having various other configurations, the speaker unit for middle and high sounds, the mounting unit, You may make it comprise an ear speaker apparatus by the 2nd housing | casing part and the speaker unit for low sounds.

  The present invention can be used for an ear speaker device in which a speaker device having various ducts is mounted on a listener's head in addition to a kelton type speaker.

It is a rough-line side view which shows the structure of the ear speaker apparatus (2.2ch) in 1st Embodiment. It is an approximate line sectional view showing the electroacoustic transduction part for bass in a 1st embodiment. It is a rough-line side view which shows the example of a structure and mounting | wearing of the ear speaker apparatus in 1st Embodiment (1). It is a rough-line side view which shows the example (2) of a structure and mounting | wearing of the ear speaker apparatus in 1st Embodiment. It is a rough-line side view which shows the example (3) of a structure and mounting | wearing of the ear speaker apparatus in 1st Embodiment. It is a rough-line side view which shows the structure of the ear speaker apparatus (4.2ch) in 2nd Embodiment. It is a rough-line side view which shows the example of a structure and mounting | wearing of the ear speaker apparatus in 2nd Embodiment (1). It is a rough-line side view which shows the example of a structure and mounting | wearing of the ear speaker apparatus in 2nd Embodiment (2). It is a rough-line side view which shows the example (3) of a structure and mounting | wearing of the ear speaker apparatus in 2nd Embodiment. It is a basic diagram which shows the structural example of the tubular duct in other embodiment. It is a rough-line sectional drawing which shows the structure (1) of the housing | casing part for low sounds in other embodiment. It is a rough-line sectional drawing which shows the structure (2) of the housing | casing part for low sounds in other embodiment. It is a rough-line sectional drawing which shows the structure (3) of the housing | casing part for low sounds in other embodiment. It is a rough-line sectional view which shows the structure (4) of the housing | casing part for low sounds in other embodiment. It is a rough-line sectional view which shows the structure (5) of the housing | casing part for low sounds in other embodiment. It is a rough-line sectional drawing which shows the structure (6) of the housing | casing part for low sounds in other embodiment. It is a rough-line side view which shows the structure of the ear speaker apparatus (4.1ch) in other embodiment.

Explanation of symbols

  1, 20, 30, 40, 200, 220, 230, 240, 800... Ear speaker device, 2L, 2R .. electroacoustic transducer for middle and high sounds, 3L .. electroacoustic transducer for bass, 50L. Middle / high sound electroacoustic conversion unit 4, 24, 44, 204, 224, 244 ...... band part, 5L ... medium / high sound case part, 6L ... medium / high sound case part, 7L ... medium / high sound use part Speaker unit, 8L ... Low-frequency speaker unit, 9L ... Tubular duct, 9AL ... Hole, 11L ... Hemispherical part, 12L ... Cover part, 13L ... Baffle plate, 51L ... Rear mid-high sound housing Body part, 53L. Rear loudspeaker unit for middle and high sounds, 100 ... Head, 101L ... Pinna, 102L ... Ear canal entrance, 103L ... Tympanic membrane.

Claims (6)

A first housing portion mounted at a predetermined position on the listener's head;
It is attached to one surface of the first housing part, and is arranged so that a predetermined distance is provided between the listener and the ear canal entrance when the first housing part is attached to the head of the listener. A speaker unit for high sounds,
A mounting section for mounting the first housing section on the head;
A second housing part mounted on the listener's head through the mounting part;
A bass speaker unit provided for the second housing part ,
The second housing part is formed in a substantially U shape so as to extend from the second housing part to the vicinity of the ear canal entrance and to return to the second housing part again, and in the vicinity of the ear canal entrance. A tubular duct that is provided with a sound emitting hole and that allows the low-frequency sound generated by the low-frequency speaker unit to reach the vicinity of the ear canal entrance from the second housing part.
Lee Ya speaker device. The hole of the tubular duct, that has been oriented in the opposite direction with respect to the ear canal entrance
Ear speaker device according to 請 Motomeko 1. Said second housing portion, Ru is disposed above the front side of the through ears of the listener through the mounting portion
Ear speaker device according to 請 Motomeko 1. Said second housing portion, Ru is disposed on the head top near the listener through the mounting portion
Ear speaker device according to 請 Motomeko 1. The tubular duct is
A protective portion is provided to prevent an end located near the ear canal entrance from entering the ear canal of the listener .
Ear speaker device according to 請 Motomeko 1. The first housing part is
When attached to the head of the listener through the mounting portion, that allowed approximately toward the direction of the ear canal entrance of the listener a sound emitting surface of the tweeter unit in the
Ear speaker device according to 請 Motomeko 1.

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