JP4826455B2 - Ear speaker device and glasses-type image display device - Google Patents

Description

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

Conventionally, a head-mounted display has a structure that is worn like glasses, and displays a video of content on a glasses-type video display unit so that a user can visually check the content, and the content of the content via a headphone. What made a user listen to an audio | voice is prevailing widely (for example, refer patent document 1).
Japanese Patent No. 3163701 (FIG. 1)

  By the way, in the head-mounted display having such a configuration, the image projected on the glasses-type image display unit is in front of the user's eyes, whereas the sound image reaching the user's ear from the headphones is the user's head. Therefore, there is a problem in that the image and the sound image do not match, giving an unnatural impression to the user.

  The present invention has been made in consideration of the above points, and intends to propose an ear speaker device and a glasses-type video display device that allow a user to listen to high-quality reproduced sound while giving natural sound image localization. .

In order to solve such a problem, in the present invention, a nose pad portion that is held by the user's nose, and a substantially rod-shaped handle that is connected to the nose pad portion, the ear hook portion that is held by being hooked on the left and right ears of the user. And a housing part provided in the middle of the handle and a housing part so that a predetermined distance is provided between the user's ear canal entrance and the nose pad part and the ear hook part. Provided is a speaker unit mounted on one surface and a tubular duct extended so that the sound generated by the housing part reaches the vicinity of the user's ear canal entrance, and the tubular duct is provided near the user's ear canal entrance from the housing part. In addition, it is formed in a substantially U shape that returns to the housing and is provided with a sound emitting hole in the vicinity of the user's ear canal entrance.

  As a result, a natural sound image is produced by the sound output from the speaker unit of the housing unit provided at a predetermined distance from the user's ear canal entrance while stabilizing the wearing state by three-point support by the nose pad and the ear hook. While providing localization, the sound generated by the casing can be directly reached from the vicinity of the user's ear canal through the tubular duct to the eardrum in the ear canal, so that a sufficiently high level and high quality reproduced sound can be obtained. The user can listen.

Further, in the present invention, the glasses-type video display unit provided with a nose pad portion to be held by the user's nose, and a substantially rod-shaped handle extending from both ends of the glasses-type video display unit, Predetermined between the ear hook that is held by being hooked on the ear, the housing provided in the middle of the handle, and the user's ear canal entrance when worn by the user via the nose pad and the ear hook. A speaker unit attached to one surface of the housing unit so that a distance is provided, and a tubular duct extended so as to reach the vicinity of the user's ear canal entrance sound generated by the housing unit , It is formed in a substantially U-shape that extends from the housing part to the vicinity of the user's ear canal entrance and returns to the housing part, and a sound emitting hole is provided in the vicinity of the user's ear canal entrance.

  As a result, output from the speaker unit of the housing unit provided at a predetermined distance from the user's ear canal entrance while stabilizing the wearing state of the glasses-type image display unit by three-point support by the nose pad and the ear hook. The sound produced by the housing part reaches the eardrum in the ear canal directly from the vicinity of the user's ear canal entrance through the tubular duct while giving a natural sound image localization that matches the image displayed on the glasses-type image display part by the sound to be heard Therefore, it is possible to allow the user to listen to a reproduction sound having a sufficient level and high quality.

  According to the present invention, the sound is output from the speaker unit of the housing unit provided at a predetermined distance ahead of the user's ear canal entrance while stabilizing the wearing state by the three-point support by the nose pad and the ear hook. While providing natural sound image localization, the sound generated by the housing can be directly reached from the vicinity of the user's ear canal through the tubular duct to the eardrum in the ear canal, so that the reproduction is of sufficient level and high quality. Thus, it is possible to realize an ear speaker device that allows the user to listen to sound and thus allows the user to listen to high-quality reproduced sound while providing natural sound image localization.

  In addition, according to the present invention, the mounting state with respect to the glasses-type image display unit is stabilized by the three-point support by the nose pad and the ear hook, and the housing unit provided in front of the user's ear canal entrance by a predetermined distance is provided. While giving a natural sound image localization that matches the image displayed on the glasses-type image display unit by the sound output from the speaker unit, the sound generated by the housing unit is passed through the tubular duct from the vicinity of the user's ear canal entrance to the inside of the ear canal. Glasses that can reach the eardrum directly, allow the user to listen to a sufficient level of high-quality playback sound, and thus allow the user to listen to high-quality playback sound while giving a natural sound image localization Type image display device can be realized.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

(1) Overall Configuration of Head Mounted Display with Ear Speakers In FIGS. 1 and 2, 1 indicates a head mounted display with ear speakers as a spectacles-type image display device as a whole, and left and right electroacoustics for configuring the ear speakers. The conversion units 2L and 2R have a structure in which they are integrally attached to the handles 7 and 8 of the head mounted display 3.

  The head mounted display 3 of the head mounted display 1 with the ear speaker includes a glasses-type main body 4 positioned in front of the eyes when the user is worn, and hinges 5 and 6 provided at the left and right ends of the main body 4. And a pair of handles 7 and 8 attached to be bent inward.

  Therefore, the head mounted display 1 with the ear speaker has a structure in which the electroacoustic transducers 2L and 2R are integrally attached to the middle portions of the handles 7 and 8 in such a head mounted display 3, respectively. On the other hand, when mounted, the electroacoustic transducers 2L and 2R are positioned a predetermined distance ahead of the user's ear canal entrance (not shown).

  The electroacoustic transducers 2L and 2R do not necessarily have to be integrally attached to the handles 7 and 8, and may be detachably attached. Further, the distance from the ear canal entrance to each user may be increased. It may be slidably attached along the longitudinal direction of the handles 7 and 8 to be adjusted.

  The main body 4 has a front surface 11 made of a half mirror (or colored glass) as a translucent member, and an upper surface 12, a back surface 13 and a bottom surface (not shown) made of opaque members, and has a hollow housing structure as a whole. have.

  A pair of eyepiece windows 14A and 14B are formed on the back surface 13 of the main body 4 so as to face the pair of left and right eyeballs of the user. A nose pad portion 15 having a letter shape is formed.

  In the head mounted display 1 with the ear speaker, the user can visually confirm the external state through the eyepiece windows 14A and 14B formed on the back surface 13 of the main body 4 and the front surface 11 having the half mirror structure. It is made like that.

  Further, the head mounted display 1 with the ear speaker has a vine-like ear hooking portion 9 at the tip of a pair of handles 7 and 8 which are foldably attached inwardly via hinge portions 5 and 6 at both left and right ends of the main body portion 4. And a connection cord 18 for transmitting a video signal to the main body portion 4 through the inside of the ear hook portion 9 and the handle 7 is attached.

  Incidentally, the attachment location of the connection cord 18 is not limited to this, and may be directly attached to the electroacoustic transducer 2L or 2R, or directly attached to the main body 4. May be.

  Therefore, in the head mounted display 1 with the ear speaker, the reproduced video based on the video signal of the content supplied from an external electronic device such as a DVD (Digital Versatile Disc) player via the connection cord 18 is displayed on the eyepiece windows 14A and 14B. It is displayed on a liquid crystal panel (not shown) provided at the back, and this can be visually confirmed by the user via the eyepieces 14AL and 14BL of the eyepiece windows 14A and 14B.

  The head mounted display 1 with the ear speaker receives an audio signal corresponding to the reproduced video of the content displayed on the liquid crystal panel from an external electronic device, converts the audio signal into a reproduced sound, and converts the audio signal into an electroacoustic conversion unit. The user can listen through 2L and 2R.

  The electroacoustic transducers 2L and 2R have casing parts 21L and 21R each having a shape in which a sphere is divided into four equal parts in the vertical direction. The casing parts 21L and 21R are arranged in the direction of the user's external auditory canal when worn. A flat portion is formed in the rearward direction toward the front, and a flat portion is also formed on the inner side in the left-right direction.

  Speaker units 22L and 22R that convert audio signals of content into reproduced sounds are attached to baffle plates 21AL and 21AR, which are flat portions formed in the rearward direction of the housing portions 21L and 21R. The speaker units 22L and 22R are configured to emit sound by vibrating the diaphragm according to the audio signal of the content supplied from the electronic device via the connection cord 18.

  Further, tubular ducts 23L and 23R made of metal and having a hollow member having a predetermined thickness bent in a substantially U-shape are attached to the baffle plates 21AL and 21AR of the housing portions 21L and 21R. The tubular ducts 23L and 23R have their distal ends bent inwardly in the left-right direction toward the user's ear canal entrance, and are further provided with holes 23AL and 23AR, respectively, in the approximate center of the distal end.

  In the head mounted display 1 with the ear speaker, since the electroacoustic transducers 2L and 2R are substantially symmetrical as shown in FIGS. 1 and 2, the electroacoustic transducer 2L on the left side is mainly described below. Will be described as an example.

  In practice, as shown in the left side view of FIG. 3, the head mounted display 1 with the ear speaker is configured such that the ear hooks 9 and 10 of the handles 7 and 8 are hooked on the user's ear and the nose pad part of the main body 4. 15 is mounted by being pressed against the user's nose, and the main body 4 is positioned in front of the user's eyes, and the electroacoustic conversion unit 2L is positioned slightly forward of the user's auricle 101L. Yes.

  As a result, the electroacoustic conversion unit 2L of the head mounted display 1 with the ear speaker directly causes the mid-high sound radiated from the speaker unit 22L to reach the user's external auditory canal entrance 102L, and is reflected by the user's cheek, auricle 101L, and the like. Since the reflected sound can also reach the external ear canal entrance 102L, it is possible to provide a natural sound image localization similar to the case of listening through a general stationary speaker.

  At this time, when the head mounted display 1 with the ear speaker is normally attached to the user, the speaker unit 22L is positioned slightly in front of the auricle 101L and the ear canal entrance 102L, and the hole 23AL of the tubular duct 23L is the entrance to the ear canal. It is made to be located in the vicinity of 102L.

  Incidentally, the tubular duct 23L has a substantially U-shaped tip, so that it does not enter the user's external auditory canal. Thereby, the head mounted display 1 with the ear speaker can prevent the user from accidentally damaging the external auditory canal by the tubular duct 23L when the head mounted display 1 with the ear speaker is mounted. ing.

  Here, as shown in FIG. 4 in the Q1-Q2 cross section in FIG. 3, the housing portion 21L forms a sealed space except for the tubular duct 23L with the speaker unit 22L attached thereto. On the other hand, a resonance circuit is formed by the housing portion 21L and the tubular duct 23L.

  Further, the tubular duct 23L penetrates the baffle plate 21AL of the casing portion 21L from the inside of the casing portion 21L and reaches the vicinity of the user's ear canal entrance 102L. In practice, the electroacoustic transducer 2L operates as a bass reflex type speaker as a whole by causing the tubular duct 23L to act as a bass reflex duct.

  By the way, in a general bass reflex type speaker, the duct is provided only inside the casing and does not extend to the outside. Therefore, for comparison with the electroacoustic conversion unit 2L, an electroacoustic conversion unit 32L as illustrated in FIG. 5 in which the same reference numerals are assigned to the corresponding portions in FIG. 4 is assumed.

  This electroacoustic conversion part 32L (FIG. 5) is configured in the same manner as a general bass reflex type speaker. Instead of the tubular duct 23L (FIG. 4) of the electroacoustic conversion part 2L, only the inside of the housing part 21L is provided. Have two tubular ducts 38L and 39L.

  In the case of the electroacoustic conversion unit 32L, medium and high sounds radiated from the speaker unit 22L when the position of the speaker unit 22L is regarded as a virtual sound source position (hereinafter referred to as a virtual sound source position) PM. Path length EM until the user reaches the eardrum 103L, and the holes 38AL and 39AL are emitted from the holes 38AL and 39AL through the tubular ducts 38L and 39L when the holes 38AL and 39AL are regarded as the virtual sound source position PL2. In comparison with the path length EL2 until the bass reaches the eardrum 103L of the user, the path length EM≈path length EL2.

  Here, the frequency characteristics of the sound that reaches the eardrum 103L by the electroacoustic transducer 32L are shown in FIG. As shown in FIG. 6, the general bass-reflex type electroacoustic transducer 32L includes medium and high sounds radiated from the speaker unit 22L and having a frequency characteristic as indicated by the characteristic curve SM, the inside of the tubular duct 38L and 39L. A bass sound having a frequency characteristic as shown in the characteristic curve SL2 radiated from the hole portions 38AL and 39AL through the inside is made to reach the eardrum 103L of the user.

  As a result, the electroacoustic conversion unit 32L allows the user to listen to the reproduced sound in which the sound pressure level in the low frequency range of the characteristic curve SM is increased to some extent, as indicated by the characteristic curve SG2 obtained by synthesizing the characteristic curve SM and the characteristic curve SL2. be able to.

  On the other hand, in the electroacoustic transducer 2L (FIG. 4) of the head mounted display 1 with the ear speaker according to the present invention, when the speaker unit 22L is regarded as the virtual sound source position PM, the medium and high sounds emitted from the speaker unit 22L are the user. The path length EM to reach the eardrum 103L and the bass emitted from the hole 23AL through the tubular duct 23L when the hole 23AL is regarded as the virtual sound source position PL1 reach the eardrum 103L of the user Comparing with the path length EL1 up to, the path length EM> the path length EL1.

  Here, the frequency characteristics of the sound that reaches the eardrum 103L by the electroacoustic transducer 2L are shown in FIG. Since the electroacoustic conversion unit 2L is a kind of bass reflex type speaker as described above, the medium and high sound having the frequency characteristics shown in the characteristic curve SM radiated from the speaker unit 22L is the same as the case shown in FIG. Then, the bass sound having the frequency characteristic as shown by the characteristic curve SL1 that is transmitted through the tubular duct 23L and radiated from the hole 23AL is combined to reach the user's eardrum 103L.

  By the way, in general, the distance from the sound source and the sound pressure level are in an inversely proportional relationship. Here, when the path lengths of the electroacoustic transducer 2L (FIG. 4) and the electroacoustic transducer 32L (FIG. 5) are compared, the path length EL1 <the path length EL2.

  That is, in the electroacoustic transducer 2L (FIG. 4), the virtual sound source position PL1 is located closer to the user's ear canal entrance 102L than the virtual sound source position PL2 of the electroacoustic transducer 32L (FIG. 5). The bass sound radiated from the hole 23AL (virtual sound source position PL1) can reach the eardrum 103L at a higher sound pressure level than in the electroacoustic transducer 32L.

  That is, as shown in FIG. 8 in which the two characteristic curves SL1 and SL2 are overlapped, the bass characteristic curve SL1 due to the tubular duct 23L has a bass characteristic due to the tubular ducts 38L and 39L due to the relationship of path length EL1 <path length EL2. The overall sound pressure level is higher than that of the curve SL2.

  As a result, the electroacoustic conversion unit 2L in the head mounted display 1 with the ear speaker has a low sound pressure level in the characteristic curve SM as shown in the characteristic curve SG1 obtained by synthesizing the characteristic curve SM and the characteristic curve SL1. The user can listen to a reproduced sound having a sufficient sound pressure level up to a relatively low frequency band, which is higher than that in the case of the conversion unit 32L (characteristic curve SG2).

  Here, when the characteristic curve SG1 is compared with the characteristic curve SG2, the sound pressure level in the characteristic curve SG2 decreases relatively steeply as it goes to the low frequency range, whereas in the characteristic curve SG1, the low frequency range side. It can be seen that the degree of decrease in the sound pressure level becomes milder as the operation proceeds.

  That is, the electroacoustic conversion unit 2L of the head mounted display 1 with the ear speaker has a high sound pressure level over a wide frequency band as compared with the electroacoustic conversion unit 32L, that is, good reproduction including a sufficient low frequency range. The sound can be transmitted to the eardrum 103 of the user for listening.

  In this case, as shown in FIGS. 3 and 4, the electroacoustic conversion unit 2L of the head mounted display 1 with the ear speaker positions the distal end portion of the tubular duct 23L in the vicinity of the user's ear canal entrance 102L. The inlet 102L is not completely closed.

  For this reason, the electroacoustic conversion unit 2L of the head mounted display 1 with the ear speaker is in the vicinity of the user in addition to the reproduction sound in which the medium and high sounds radiated from the speaker unit 22L and the low sound radiated from the hole 23AL of the tubular duct 23L are combined. The generated sound (hereinafter referred to as ambient sound) can be reached and heard by the user's eardrum 103L without being blocked.

  Incidentally, the electroacoustic transducer 2L of the head mounted display 1 with the ear speaker is effective in the diaphragm of the speaker unit 22L, with the inner volume of the casing 21L being 10 [ml], the outer diameter of the speaker unit 22L being 21 [mm]. The vibration radius is 8.5 [mm], the equivalent mass of the vibration system is 0.2 [g], the lowest resonance frequency f0 is 360 [Hz], and the resonance Q0 is 1.0.

  The tubular duct 23L (FIG. 4) has an inner diameter of 1.8 [mm], an effective length of 50 [mm] from the inner end 23BL located in the housing portion 21L of the tubular duct 23L to the hole 23AL, and a baffle. The distance from the surface of the plate 21AL to the hole 23AL is about 35 [mm].

  Here, since the tubular duct 23L has a U-shaped side surface and a hole 23AL is provided at the center of the outer end, it substantially constitutes two bass reflex 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 8L is converted into one tubular duct, the inner diameter and the effective The length has been determined.

  That is, the tubular duct 23L 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.

  For the electroacoustic transducer 2L (FIG. 4) of the head-mounted display 1 with the ear speaker and the electroacoustic transducer 32L (FIG. 5) of a general bass reflex type speaker, a measurement jig simulating a human auricle and ear canal is provided. When the actual frequency characteristics were measured using the characteristic curve SG11 (in the case of the electroacoustic transducer 2L) and the characteristic curve SG12 (in the case of the electroacoustic transducer 32L) as shown in FIG. 9 were obtained.

  In FIG. 9, the characteristic curve SG11 of the electroacoustic conversion unit 2L is more than the characteristic curve SG12 of the electroacoustic conversion unit 32L in the low frequency range of about 500 [Hz] or less, similarly to the theoretical frequency characteristic shown in FIG. The sound pressure level is high. That is, it is shown that the electroacoustic conversion unit 2L of the head mounted display 1 with the ear speaker can actually listen to a good reproduced sound including a sufficient low sound.

  As described above, when the head mounted display 1 with the ear speaker is mounted on the user's head 100, the speaker unit 22L is positioned slightly away from the user's ear canal entrance 102L, and the reproduced sound from the speaker unit 22L While radiating treble and radiating bass sound of the reproduced sound from the hole 23AL of the tubular duct 23L that extends from the housing portion 21L to the vicinity of the external ear canal entrance 102L and acts as a bass reflex duct, giving natural sound localization The user can listen to high-quality reproduced sound including sufficient bass.

  Note that, in the tubular ducts 23L and 23R (FIG. 1) of the head mounted display 1 with the ear speaker described above, the holes 23AL and 23AR are located in the vicinity of the user's ear canal entrance 102L and in the opposite direction to the ear canal entrance 102L. It is provided in the state. In practice, the holes 23AL and 23AR are provided inside the distal end portions of the tubular ducts 23L and 23R formed in the side U shape.

  In this case, in the head mounted display 1 with the ear speaker, the holes 23AL and 23AR of the tubular ducts 23L and 23R are radiated from the holes 23AL and 23AR of the tubular ducts 23L and 23R even if the holes 23AL and 23AR face the opposite direction with respect to the ear canal entrance. Since the bass sound has no directivity, the bass sound can surely reach the user's ear canal entrance 102L, while the medium duct sound emitted from the holes 23AL and 23AR is slightly leaked. Since the holes 23AL and 23AR of the 23R face in the opposite direction with respect to the ear canal entrance 102L and the middle and high sounds have directivity, the user hardly reaches the ear canal.

  Therefore, in the head mounted display 1 with the ear speaker, middle and high tone of the reproduced sound is output from the speaker units 22L and 22R to reach the user's ear canal entrance 102L, and the reproduced sound is transmitted from the holes 23AL and 23AR of the tubular ducts 23L and 23R. While only the low sound reaches the user's ear canal entrance, the middle and high sound leaking slightly is output in a state having directivity from the holes 23AL and 23AR facing away from the user's ear canal entrance 102L. The leaked middle / high sound does not reach the user's external auditory canal entrance 102L, so that the sound image localization of the user to which the middle / high sound mainly acts is not adversely affected.

  As a result, in the head mounted display 1 with the ear speaker, a sufficient level of bass is provided through the holes 23AL and 23AR of the tubular ducts 23L and 23R while giving a natural sound image localization by the medium and high sounds output from the speaker units 22L and 22R. Can be listened to by the user.

  Incidentally, the positions of the holes 23AL and 23AR are not limited to this location, and any location on the tubular ducts 23L and 23R as long as the direction is opposite to the user's ear canal entrance 102L. Good.

(2) Operation and effect In the above configuration, the head mounted display 1 with the ear speaker is held on the head 100 by the three points of the nose pad 15 of the main body 4 and the ear hooks 9 and 10 of the handles 7 and 8. Therefore, the wearing state can be further stabilized while the structure has the main body 4 that is heavier than general headphones.

  When the head mounted display 1 with the ear speaker in such an excellent wearing state is attached to the user's head 100, the speaker unit 22L provided in the housing portion 21L of the electroacoustic transducer 2L is connected to the user's ear canal. In a state where the distal end portion of the tubular duct 23L that functions as a bass reflex duct is positioned in the vicinity of the ear canal entrance 102L and is positioned slightly in front of the entrance 102L and extending rearward from the housing portion 21L. A reproduction sound based on the audio signal of the supplied content is output.

  At this time, in the electroacoustic conversion unit 2L (FIG. 4) of the head mounted display 1 with the ear speaker, the tubular duct 23L is more than the path length EM until the medium and high sounds radiated from the speaker unit 22L reach the eardrum 103L of the user. Since the path length EL1 until the bass radiated from the hole 23AL reaches the eardrum 103L is shortened, as shown in the characteristic curve SL1 with respect to the medium and high sounds as shown in the characteristic curve SM (FIG. 8). In addition, a bass having a relatively high sound pressure level can reach the eardrum 103L.

  Accordingly, the electroacoustic conversion unit 2L of the head mounted display 1 with the ear speaker reflects the medium and high sounds radiated from the speaker unit 22L on the cheek, the auricle 101L and the like of the user to reach the eardrum 103L, so that The user can listen to the reproduced sound having characteristics similar to those of listening to the reproduced sound through the speaker, and can give a natural feeling of localization such that the sound image is located outside the head. The reproduced video of the content displayed on the liquid crystal panel is associated with the sound image localization of the reproduced sound, so that the user does not feel uncomfortable.

  Further, the electroacoustic transducer 2L of the head mounted display 1 with the ear speaker has a characteristic curve SG1 (FIG. 8) and a characteristic curve SG11 (FIG. 9) because the tubular duct 23L extends to the vicinity of the user's ear canal entrance 102L. As shown, it is possible to allow the user to listen to a high-quality reproduced sound having a relatively sufficient sound pressure level up to the low sound range.

  In this case, the electroacoustic transducer 2L of the head mounted display 1 with the ear speaker has a general bass reflex electroacoustic transducer 32L (FIG. 5) because the tubular duct 23L extends to the vicinity of the user's ear canal entrance 102L. , The bass having a large sound pressure level such as the characteristic curve SL1 (FIG. 8) reaches the eardrum 103L of the user as compared to the bass such as the characteristic curve SL2 (FIG. 6) output from the tubular ducts 38L and 39L. As a result, it is possible to allow the user to listen to a bass sound that tends to be insufficient due to the relatively small diameter of the speaker unit 22L and slightly away from the ear canal entrance 102L at a sufficient sound pressure level.

  Furthermore, the head mounted display 1 with the ear speaker does not increase the reproduction volume of the bass sound, but is sufficient for the user's eardrum 103L (FIG. 4) by bringing the hole 23AL of the tubular duct 23L, which is a low-frequency emission port, close to the eardrum 103L. Therefore, compared with the case where a bass is reproduced using, for example, a large-diameter speaker or a subwoofer, the bass and vibration leaking to the surroundings can be substantially eliminated.

  Therefore, for example, when the user listens to the playback sound through the head mounted display 1 with the ear speaker at midnight, a good playback sound including a sufficiently low sound without causing much trouble to the neighborhood or the surroundings. You can enjoy.

  Further, since the tubular duct 23L does not block the user's ear canal entrance 102L, it is possible to reach the eardrum 103L and listen to the reproduced sound and the surrounding sound generated around the user without being blocked.

  Thereby, in the head mounted display 1 with the ear speaker, when the user needs to listen to the ambient sound such as when the user walks or plays sports, the ambient sound is surely heard in addition to the good reproduction sound. Can be made.

  In addition, the head mounted display 1 with the ear speaker does not cover the user's auricle 101L or the like with the electroacoustic conversion unit 2L unlike the conventional sealed headphones, so that the user wearing the sealed headphones feels. No discomfort such as a feeling of blockage or stuffiness. Further, since the head mounted display 1 with the ear speaker 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 user does not feel uncomfortable.

  In addition, since the head mounted display 1 with the ear speaker allows the user to listen to a bass having a sufficient volume level by bringing the hole 23AL of the tubular duct 23L, which is a low-frequency radiation port, close to the eardrum 103L, the diameter of the speaker unit 22L can be reduced. There is no need to unnecessarily increase the size, and the size of the housing portion 21L can be minimized.

  As a result, since the overall size and weight of the head mounted display 1 with the ear speaker can be suppressed to the minimum necessary, the troublesomeness caused by the size and weight when the user wears the head mounted display 1 with the ear speaker is minimized. Can be suppressed.

  According to the above configuration, the head mounted display 1 with the ear speaker can be mounted on the user's head 100 in a stable state by supporting three points, and in addition, the speaker unit 22L of the electroacoustic transducer 2L can be mounted. Tubular duct 23L acting as a bass reflex duct is positioned by being slightly forward of the user's ear canal entrance 102L and outputting reproduced sound in a state where the hole 23AL of the tubular duct 23L is located in the vicinity of the ear canal entrance 102L. Since the bass radiated from the hole 23AL can reach the eardrum 103 with a sufficient sound pressure level, the user can obtain a good reproduced sound with a sufficient sound pressure level up to a relatively low sound range while giving a natural sound image localization. Can be heard.

(3) Other Embodiments In the above-described embodiment, the case where the tubular duct 23L is formed in a substantially U-shaped side surface and functions as two bass reflex ducts with the hole 23AL as a boundary is described. However, the present invention is not limited to this, and the tubular duct 23L may be configured by one or three or more tubular ducts.

  For example, as shown in FIG. 10, in the electroacoustic transducer 2L of the head mounted display 1 with the ear speaker, one tubular duct 98L functioning as a bass reflex duct may be extended rearward from the housing 21L. Moreover, a protective part 99L may be attached to the distal end of the tubular duct 98L so as not to damage the user's ear canal entrance 102L. In this case, the protection unit 99L is configured by a sponge-like member or the like through which sound can easily pass, so that the user can listen to the sound without blocking ambient sounds.

  In the above-described embodiment, the case where the tubular duct 23L formed of a hard material such as metal is used has been described. However, the present invention is not limited to this, and a soft material such as a flexible resin is used. The tubular duct 23L formed by the above may be used.

  Furthermore, in the above-described embodiment, the case where the tubular duct 23L is provided so as to penetrate the baffle plate 21AL of the housing portion 21L has been described. However, the present invention is not limited to this, and the tubular duct 23L is disposed in the housing. You may provide so that the other side in 21 L of body parts may be penetrated.

  Further, in the embodiment described above, when the head mounted display 1 with the ear speaker is mounted on the user's head 100 (FIG. 3), the sound emitting surface of the speaker unit 22L is directed substantially rearward. As described above, the present invention is not limited to this. For example, the sound emitting surface of the speaker unit 22L may be slightly inward. In short, the sound emitting surface of the speaker unit 22L is generally directed toward the ear canal entrance 102L. It is only necessary that the radiating medium and high sounds reach the eardrum 103L efficiently.

  Further, in the above-described embodiment, the case where the head mounted display 1 with the ear speaker has the left and right electroacoustic converters 2L and 2R and outputs two-channel reproduced sound has been described. For example, only the left electroacoustic converter 2L may be provided to output one channel of reproduced sound.

  Further, in the above-described embodiment, the case where the speaker unit 22L for middle and high sounds is provided in the housing portion 21L has been described. However, the present invention is not limited to this. A plurality of speaker units may be provided in the housing part 21L, such as providing a speaker unit in the single housing part 21L to form a 2-way speaker.

  Furthermore, in the above-described embodiment, the case where the casing portion 21L having a shape obtained by dividing the sphere into four equal parts in the vertical direction has been described. However, the present invention is not limited to this, and for example, a cubic shape or Various shapes such as a cylindrical shape may be used, and in short, it is only necessary to have a substantially sealed space inside that can function as an enclosure for a bass reflex type speaker.

  Further, in the above-described embodiment, the case where the casing portion 21L in which the edge is left at the end portion of the inner end portion 23BL of the tubular duct 23L (FIG. 4) is used is described. However, the present invention is not limited to this, and a housing portion 21L in which an R-shape is formed on the end portion of the inner end portion 23BL of the tubular duct 23L may be used. In this case, in the casing portion 21L, the air pushed out from the back side of the speaker unit 22L does not hit the edge to generate a wind noise, and only the low sound without noise is radiated from the hole portion 23AL of the tubular duct 23L. can do.

  Further, in the above-described embodiment, the case where the tubular ducts 23L and 23R are integrally attached to the housing portions 21L and 21R has been described. However, the present invention is not limited thereto, and attachment and removal are possible. A possible configuration is also possible.

  For example, as shown in FIG. 11 in which the same reference numerals are given to corresponding parts to FIG. 4, the housing portion 21L1 has a concave duct holding portion 21L2 formed on the baffle plate 21AL of the housing portion 21L1. The tubular duct 23L1 can be removed by fitting by fitting the duct fitting portion 23L2 of the tubular duct 23L1 and eliminating the fitting state between the duct holding portion 21L2 and the duct fitting portion 23L2.

  Furthermore, in the above-described embodiment, the case where the tubular duct 23L in which the duct length from the hole 23AL to the inner end 23BL is set to the same length is used is described, but the present invention is not limited to this. Instead, tubular ducts having different lengths may be used.

  For example, as shown in FIG. 12 where parts corresponding to those in FIG. 3 are given the same reference numerals, a length L1 from the hole 23AL to the inner end 23BL1, and a length L2 from the hole 23AL to the inner end 23BL2 In the casing portion 21L3 provided with the tubular ducts 23L3 having different lengths, a phase shift of the resonance characteristics occurs between the duct portion having the length L1 and the duct portion having the length L2, and as a result, the output is slightly output from the hole portion 23AL. The frequency components in the middle and high range are canceled out, and only the low tone in which the middle and high tone is canceled can be radiated from the hole 23AL of the tubular duct 23L3.

  Furthermore, in the above-described embodiment, the case where the electric acoustic conversion unit 2L that outputs the low-frequency sound generated in the rear of the speaker unit 22L, that is, in the internal space of the housing unit 21L, is output by the tubular duct 23L is described. The present invention is not limited to this, and a cover portion that is formed in a hemispherical shape, such as the electroacoustic conversion portion 202L shown in FIG. The eardrum 103L may be reached through the hole 208AL of the tubular duct 208L provided in 204LB.

  The casing 204L of the electroacoustic conversion unit 202L is hermetically sealed with the front space of the speaker unit 207L except for the hole 208AL of the tubular duct 208L. The cover unit 204LB and the tubular duct 208L resonate with the speaker unit 207L. A circuit is formed.

  The tubular duct 208L reaches the vicinity of the user's ear canal entrance 102L from the inside of the housing portion 204L via the cover portion 204LB of the housing portion 204L. In practice, the electroacoustic conversion unit 202L collects mainly middle and high sounds radiated from the front surface of the speaker unit 207L via the cover unit 204LB and the tubular duct 208L, and the user's eardrum 103 from the hole 208AL of the tubular duct 208L. By allowing the sound to reach directly, it is possible to allow the user to listen to medium and high sounds with a sufficient sound level with little sound leakage.

  The hemispherical cover portion 204LB may have a shape such as a quadrangular pyramid or a triangular pyramid. In short, a structure that collects medium and high sounds output from the speaker unit 207L and does not leak to the outside. If it is good.

  Further, as shown in FIG. 14, the through hole 305 is provided at the rear of the speaker unit 207 </ b> L, as well as the housing 204 </ b> L (FIG. 13) having a structure in which the hemispherical portion 204 </ b> LA having a structure in which the rear of the speaker unit 207 </ b> L is closed. 308 are formed, and a housing 304L having a hemispherical portion 304LA to which an acoustic resistor 309 made of sponge or the like that closes the through holes 305 to 308 from the inside is attached may be used.

  In the case 304L (FIG. 14) in this case, the rear side of the speaker unit 207L is opened by the through holes 305 to 308 so that the diaphragm of the speaker unit 207L can easily follow the audio signal and pass through. Since the acoustic resistor 309 can prevent deterioration in sound quality due to the formation of the holes 305 to 308, medium sound with high sound quality can be radiated from the hole 208AL of the tubular duct 208L.

  Incidentally, in the case 304L (FIG. 14), the acoustic resistor 309 is not necessarily provided, and the acoustic resistor 309 is attached if necessary, and the length and thickness thereof are changed. It is possible to adjust the sound quality.

  Furthermore, not only the housing portion 204L (FIG. 13) provided with the hemispherical portion 204LA having a structure in which the rear of the speaker unit 207L is closed, but as shown in FIG. 15, through holes 405 to 408 are provided in front of the speaker unit 207L. And a housing portion 404L having a cover portion 404LB to which acoustic resistors 409 and 410 made of sponge or the like that close the through holes 405 to 408 from the inside are attached may be used.

  In the housing portion 404L (FIG. 15) in this case, the front side of the speaker unit 207L is opened by the through holes 405 to 408, so that the diaphragm of the speaker unit 207L can easily follow the audio signal and pass through. The sound resistance due to the formation of the holes 405 to 408 can be prevented by the acoustic resistors 409 and 410, so that high-quality medium and high sounds can be emitted from the hole 208AL of the tubular duct 208L.

  Incidentally, in the housing 404L (FIG. 15), the acoustic resistors 409 and 410 are not necessarily provided, and the acoustic resistors 409 and 410 are attached and the length and thickness thereof are changed as necessary. It is possible to adjust the sound quality by attaching the selected one.

  Furthermore, not only the casing 204L (FIG. 13) in which the tubular duct 208L is provided on the surface of the cover part 204LB, but a housing in which the tubular duct 508L is integrally provided on the surface of the hemispherical part 504LA as shown in FIG. The body part 504L may be used.

  In this case, the housing portion 504L (FIG. 16) has a structure similar to that of a so-called kelton type speaker device, and confines middle and high sounds in a space in front of the speaker unit 207L, while a predetermined amount from the rear of the speaker unit 207L. Only the low frequency band can be radiated through the hole 508AL of the tubular duct 508L.

  Incidentally, the structure of the housing portion 504L (FIG. 16) is not limited to this, and the rear portion of the speaker unit 207L is closed by a hemispherical portion, and a tubular duct is provided on any surface of the cover portion 204LB. A kelton type is also conceivable.

  Furthermore, not only the housing part 204L (FIG. 13) formed in a state where the tubular duct 208L is integrated with the surface of the cover part 204LB, but a fitting part 604LBS formed on the cover part 604LB as shown in FIG. By engaging the holding portion 608LS formed on one side of the tubular duct 608L with each other, the casing portion 604L having a configuration in which the tubular duct 608L is detachably provided to the cover portion 604LB may be used. good.

  Thus, the casing 604L (FIG. 17) is used with the tubular duct 608L attached only when necessary for the user, and is used with the tubular duct 608L removed when unnecessary for the user. Therefore, user convenience can be greatly improved.

  Furthermore, not only in the housing part 204L (FIG. 13) inside the cover part 204LB but with an edge remaining at the base part of the tubular duct 208L, it is inside the cover part 704LB as shown in FIG. Alternatively, a housing portion 704L in which an R-shaped round portion 711 is formed at the base portion of the tubular duct 708L integrated with the cover portion 704LB may be used.

  In the housing portion 704L (FIG. 18), the air pushed out from the front side of the speaker unit 207L does not hit the edge to generate a wind noise, and only the high-quality medium / high sound is passed through the hole of the tubular duct 708L. It can be emitted from 708AL.

  Furthermore, not only the housing part 204L (FIG. 13) formed in a state where the tubular duct 208L is integrated with the surface of the cover part 204LB, but without distinguishing between the cover part 204LB and the tubular duct 208L, A casing having a structure in which a tubular duct formed in a thin tubular shape as it goes to the tip in a shape that wraps around the front side may be attached to the baffle plate 204AL.

  Furthermore, the duct lengths to the surface of the cover part 204LB with the hole 208AL as the center are not limited to the tubular ducts 208L each having the same length, but tubular ducts having different lengths are used. Anyway.

  For example, as shown in FIG. 19 in which parts corresponding to those in FIG. 12 are denoted by the same reference numerals, a length L3 from the hole 808AL to the inner end 808BL1, and a length L4 from the hole 808AL to the inner end 808BL2 In the casing portion 804L provided with the tubular duct 808L having different lengths, a phase shift of the resonance characteristics occurs between the duct portion having the length L3 and the duct portion having the length L4, and as a result, a slight output is generated from the hole portion 808AL. The frequency component in the middle / high range is canceled out, and only the low tone in which the middle / high tone is canceled can be radiated from the hole 808AL of the tubular duct 208L2.

  Further, in the above-described embodiment, the case where the head mounted display 3 with the ear speaker having the structure in which the electroacoustic transducers 2L and 2R are integrally attached in the middle of the handles 7 and 8 of the head mounted display 3 is described. However, the present invention is not limited to this, and the electroacoustic transducers 2L and 2R are integrally attached in the middle of the spectacles or sunglasses pattern, or the electroacoustics in the middle of the spectacles pattern of the frame without the lens. A structure in which the conversion units 2L and 2R are integrally attached may be applied.

  Further, in the above-described embodiment, the nose pad portion 15 as the nose pad portion, the ear hook portions 9 and 10 as the ear hook portion, the electroacoustic conversion portions 2L and 2R as the housing portion, and the speaker unit In the above description, the speaker unit 22L and 22R and the tubular ducts 23L and 23R as tubular ducts constitute the ear speaker device and the eyeglass-type video display device. The ear speaker device and the eyeglass-type video display device may be configured by the nose pad portion, the ear hook portion, the housing portion, the speaker unit, and the tubular duct that are configured as described above.

  The present invention can be used not only for a head mounted display but also for a glasses-type video display device for viewing a stereoscopic video.

It is a rough-line perspective view which shows the whole structure (1) of the head mounted display with an ear speaker. It is a rough-line perspective view which shows the whole structure (2) of the head mounted display with an ear speaker. It is a rough-line side view which shows the mounting state (1) of the head mounted display with an ear speaker. It is a rough-line upper cross section which shows the mounting state (2) of the head mounted display with an ear speaker. It is an approximate line top sectional view showing a general bass reflex type ear speaker. It is a basic diagram which shows the frequency characteristic in the conventional bass-reflex type ear speaker. It is a basic diagram which shows the frequency characteristic of the electroacoustic conversion part in the head mounted display with an ear speaker. It is a basic diagram which shows a theoretical frequency characteristic. It is a basic diagram which shows the frequency characteristic by measurement. It is a rough-line perspective view which shows the structural example (1) of the tubular duct in other embodiment. It is a rough-line perspective view which shows the structural example (2) of the tubular duct by other embodiment. It is a rough-line perspective view which shows the structural example (3) of the tubular duct by other embodiment. It is a rough-line upper sectional view which shows the structure of the electroacoustic conversion part in other embodiment. It is a rough-line sectional drawing which shows the structural example (1) of the housing | casing part by other embodiment. It is a rough-line sectional view which shows the structural example (2) of the housing | casing part by other embodiment. It is a rough-line sectional drawing which shows the structural example (3) of the housing | casing part by other embodiment. It is a rough-line perspective view which shows the structure (5) of the tubular duct by other embodiment. It is a rough-line perspective view which shows the structure (6) of the tubular duct by other embodiment. It is a rough-line perspective view which shows the structure (7) of the tubular duct by other embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Head mounted display with ear speaker, 2L, 2R ... Electroacoustic conversion part, 3 ... Head mounted display, 4 ... Body part, 5, 6 ... Hinge part, 7, 8 ... Pattern, 9, 10: Ear hooking part, 11: Front face 11, 12 ... Upper face, 13 ... Back face, 15 ... Nose rest part, 21L, 21R ... Housing part, 22L, 22R ... Speaker unit, 23L, 23R …… Tubular duct, 23AL, 23AR …… Hole, 100 …… Head, 101L …… Auricle, 102L …… Ear canal entrance, 103L …… Tympanic membrane.

Claims (6)

A nose pad portion held by the user's nose;
An ear hook that is connected to the nose pad and is held by being hooked to the left and right ears of the user;
A casing provided in the middle of the handle;
A speaker unit attached to one surface of the housing so that a predetermined distance is provided between the user's ear canal entrance and the user's ear canal entrance when mounted on the user via the nose pad and the ear hook;
A tubular duct extended to allow the sound generated by the casing to reach the vicinity of the user's ear canal entrance ;
The tubular duct is
An ear that extends from the housing to the vicinity of the user's ear canal entrance and returns to the housing again in a substantially U shape, and is provided with a sound emitting hole in the vicinity of the user's ear canal entrance. Speaker device. The housing part is
When mounted on the user's head, the sound emitting surface of the speaker unit is oriented approximately in the direction of the user's ear canal entrance.
Ear speaker device according to 請 Motomeko 1. The tubular duct allows sound generated in the internal space of the housing to reach the vicinity of the user's ear canal entrance.
Ear speaker device according to 請 Motomeko 1. A glasses-type image display unit provided with a nose pad portion held by the user's nose;
An ear hook part that is formed by a substantially rod-like handle extending from both ends of the eyeglass-type image display part, and is held by being hooked on the left and right ears of the user;
A casing provided in the middle of the handle;
A speaker unit attached to one surface of the housing so that a predetermined distance is provided between the user's ear canal entrance and the user's ear canal entrance when mounted on the user via the nose pad and the ear hook;
A tubular duct extended to allow the sound generated by the casing to reach the vicinity of the user's ear canal entrance ;
The tubular duct is
Extending from the housing to the vicinity of the user's ear canal entrance and returning to the housing again, it is formed in a substantially U shape, and a sound emitting hole is provided in the vicinity of the user's ear canal entrance.
Eye mirror type image display device. The housing part is
When mounted on the user's head, the sound emitting surface of the speaker unit is oriented approximately in the direction of the user's ear canal entrance.
Glasses-type video display according to 請 Motomeko 4. The tubular duct allows sound generated in the internal space of the housing to reach the vicinity of the user's ear canal entrance.
Glasses-type video display according to 請 Motomeko 4.

Images