JP5531605B2 - Bone conduction speaker and bone conduction headphone device - Google Patents

Description

  The present invention relates to a bone conduction speaker incorporating a bone conduction driver and a bone conduction headphone device in which the bone conduction speaker is provided at an end of a headband.

  In recent years, a bone conduction headphone device has been provided with a bone conduction speaker at the end of a headband, and the speaker is pressed against the side of the head in front of the ear of the temple, and mechanical vibrations converted from an acoustoelectric signal are heard through the skull What is transmitted to the nerve is provided, and is used as headphones for audio equipment, hands-free speakers for mobile phones, and the like. Such a conventional bone conduction headphone device presses a bone conduction speaker against the temple part, and since the ear is not blocked at all, it is possible to enjoy music from the headphone device while listening to surrounding sounds and conversations. It can be done. However, for purely enjoying music, although it depends on the performance of the bone conduction driver, further improvement in sound clearness, sound thickness, sound quality in the low frequency range, etc. has been demanded.

  On the other hand, according to the situation, the present applicant has first stated that the bone conduction speaker can be used to enjoy music, etc. while listening to surrounding sounds and conversations, and to listen to clearer and more realistic sounds. A bone conduction headphone device is provided in which the unit is attached so as to be pivotable back and forth between at least a front position facing the temple portion of the user and a rear position covering the ear (see Patent Document 2). According to this headphone device, by setting the bone conduction speaker unit at the front position, it is possible to listen to music, telephone voice, etc. through the skull while listening to surrounding sounds and speech from the ear, By setting the position, the unit blocks the ears and you can enjoy a clearer and more realistic sound. However, although this headphone device can obtain a clear and thick sound quality by setting the speaker unit at the rear position, it cannot hear surrounding sounds and speech because the ear is closed at that time. Further, a mechanism for rotating the bone conduction speaker unit is necessary, which causes an increase in cost.

JP 2007-158924 A

  Therefore, in view of the above situation, the present invention is to solve the problem that a complicated structure such as a rotation mechanism is unnecessary, and a clear and thick sound can be obtained in the low frequency range without closing the ear. A bone conduction speaker and a bone conduction headphone device are provided.

  As a result of diligent study to solve the above-mentioned problems, the present inventor can transmit vibration from the side of the head to the skull and simultaneously transmit the vibration from the tragus to the internal cartilage to close the ear. In addition, the present inventors have found that a clearer and thicker sound can be obtained in the low frequency range, and the present invention has been completed.

  That is, the present invention is a bone conduction speaker incorporating a bone conduction driver for converting an acoustoelectric signal into mechanical vibration, which is pressed against the side of the head in front of the user's ear and mechanical vibration of the bone conduction driver. A main vibration output unit for transmitting the sound from the side surface position to the skull, and the main vibration output unit or its peripheral part projecting from the rear side, which is the ear side, to the user's tragus or the vicinity thereof A bone conduction speaker comprising an auxiliary vibration output unit for contacting and transmitting mechanical vibration to the cartilage of the tragus was constructed. An “a tragus” is a small projection called a small ear just in front of a hole in a person's ear.

  Here, it is preferable that the auxiliary vibration output portion is formed by projecting a bent metal thin wire from the main vibration output portion or a peripheral portion thereof to the rear side.

  Furthermore, it is preferable that the auxiliary vibration output unit is provided in an arch shape or a hook shape.

  Moreover, what provided the insertion member inserted in an ear hole in the said auxiliary | assistant vibration output part is also preferable.

  The present invention also provides a bone conduction headphone device in which the bone conduction speaker described above is provided at the end of the headband.

  The bone conduction speaker according to the present invention having the above-described configuration protrudes from the main vibration output unit or its peripheral portion to the rear side, which is the ear side, separately from the main vibration output unit pressed against the head side surface. Since the auxiliary vibration output part is provided to contact the user's tragus or its vicinity and transmit mechanical vibration to the tragus cartilage, the bass is clearer and thicker without blocking the ear. A pitch can be obtained, and a complicated structure such as a rotation mechanism is not required, and an excellent pitch can be obtained when listening to music or the like while suppressing an increase in cost.

  Further, since the auxiliary vibration output portion is formed by projecting a bent metal thin wire from the main vibration output portion or a casing around the main vibration output portion to the rear side, the mechanical vibration of the main vibration output portion is reduced to the metal thin wire. Can be efficiently transmitted from the tragus to the internal cartilage.

  In addition, since the auxiliary vibration output portion protrudes in an arch shape or a hook shape, it can be brought into contact with the user's tragus, as well as the tragus protruding from the side of the head. The auxiliary vibration output unit can be locked, so that the effect of improving the sound feeling can be ensured and the wearing feeling can be enhanced.

  In addition, since the auxiliary vibration output portion is provided with an insertion member to be inserted into the ear hole, the contact state with the tragus can be stably maintained and the ear is blocked, but more excellent. Can be obtained.

1 is a perspective view showing a bone conduction headphone device according to a representative embodiment of the present invention. (A)-(c) is explanatory drawing which shows the principal part of the bone conduction speaker part of a bone conduction headphones apparatus similarly. Explanatory drawing which similarly shows the use condition of a bone conduction headphones apparatus. Explanatory drawing which shows the modification of a bone-conduction speaker part. (A)-(c) is explanatory drawing which shows the other modification of a bone-conduction speaker part. Explanatory drawing which shows the further another modification of a bone-conduction speaker part similarly. Explanatory drawing which similarly shows another modification. An explanatory view showing other modifications.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a perspective view showing the overall configuration of a bone conduction headphone device according to the present invention, and FIGS. 1 to 3 show typical embodiments, in which the symbol H is a bone conduction headphone device, 1 is a bone conduction speaker, Reference numeral 2 denotes a main vibration output unit, and 3 denotes an auxiliary vibration output unit.

  As shown in FIG. 1, the bone conduction headphone device H of the present invention is provided with a bone conduction speaker 1 having a built-in bone conduction driver for converting an acoustoelectric signal into mechanical vibration at the end of a headband 6. As shown in FIG. 3, the bone conduction speaker 1 is pressed against the head side surface 5 in front of the user's ear 4, and the main vibration output for transmitting the mechanical vibration of the bone conduction driver from the side surface position to the skull. Part 2 and the main vibration output part 2 or its peripheral part projecting from the rear side, which is the ear side, abuts against the user's tragus 40 or the vicinity thereof, and mechanical vibration is applied to the cartilage of the tragus And an auxiliary vibration output unit 3 for transmitting to the device.

  The headband 6 is formed in a substantially U shape with a material having moderate elasticity, such as a synthetic resin such as polypropylene, or a metal such as aluminum or stainless steel, which is wound around a portion extending from the back of the head to the neck. In this example, the bone conduction speaker 1 is provided at both ends of the headband 6, but may be provided only at one end. When it is provided only at one end, a pad that contacts the upper part of the ear may be provided on the other end side. Moreover, it is also possible to comprise as a type which wraps a headband through a user's top part. Furthermore, the present invention includes a configuration in which such a headband is omitted and an ear hook type or the like is configured.

  The bone conduction speaker 1 includes a speaker main body 10 provided continuously at the end of the headband 6 and a driver unit 11 protruding from the speaker main body 10 toward the inside where the user's head exists. The speaker main body 10 includes circuit components and the like, and the driver unit 11 includes a bone conduction driver. The driver unit 11 is supported so that the head side surface 5 of the user can be slightly changed with respect to the speaker main body 10 so that the vibration surface 12 of the unit is in close contact with the head surface 5 of the user. Has been. Specifically, a concave spherical portion 10b is provided on the speaker main body 10 side, and a convex spherical portion 11a that is partially inserted into the driver unit 11 side is provided, and the bottom of the concave spherical portion 10b. In this structure, the tip of the convex spherical portion 11a is supported.

  The driver unit 11 includes the convex spherical portion 11a, a cylindrical portion 13 extending inwardly where the user's head is present, and a substantially flat vibrating surface 12 that contacts the user's head. The housing 11c is provided, and in particular, the vibration surface 12 functions as the main vibration output unit 2 that transmits the mechanical vibration of the built-in bone conduction driver to the skull of the user. As the bone conduction driver, various types such as conventionally known electromagnetic type, electrodynamic type, electrostatic type and piezoelectric type can be used. The source of the transmitted acoustoelectric signal can correspond to various devices such as communication devices such as mobile phone terminals and audio devices.

  The auxiliary vibration output unit 3 is configured by projecting a bent metal thin wire 30 rearward from the main vibration output unit 2 or its surrounding housing. In this example, the housing 11c of the driver unit 11 is mounted on the auxiliary vibration output unit 3. The annular thin metal wire 30 is fixed with an adhesive or the like so as to be partially wound around the above-described convex spherical surface portion 11a, and the remaining portion protrudes in an arch shape. As a result, the mechanical vibration of the bone conduction driver generated in the case 11c in which the bone conduction driver is built is transmitted to the cartilage of the user's tragus through the thin metal wire 30, and it is clear and thick without blocking the ear. The function of obtaining a certain sound feeling is achieved.

  In this example, the auxiliary vibration output unit 3 protrudes from the housing 11 c of the driver unit 11, but may be protruded from the speaker body 10. For example, what is shown in FIG. 4 is one in which both ends of a thin metal wire 30 bent in a substantially C shape are supported by the casing 10c of the speaker main body 10 and protruded in an arch shape, as shown in FIG. A case in which the casing 10c of the speaker main body 10 and the synthetic resin are integrally formed as shown in FIGS. Further, it may be one that protrudes like a bowl as shown in FIG. 5 (a), or one that protrudes like a bar as shown in FIG. 5 (c). However, it is a preferred embodiment that the auxiliary vibration output unit 3 is projected in an arch shape or a hook shape because it can be locked to the user's tragus 40 depending on the size.

  Furthermore, as shown in FIG. 7, the auxiliary vibration output unit 3 may be provided with an insertion member 7 to be inserted into the ear hole. As a result, the ear is blocked by the insertion member 7, while the middle portion 30 d of the thin metal wire 30 is surely brought into contact with the tragus so that an excellent sound feeling can be obtained more stably. In addition, it can be transmitted to the periphery of the ear hole through the insertion member 7, and a clearer sound feeling can be obtained. As such an insertion member 7, a synthetic rubber or elastomer material such as urethane or silicone rubber used as a pad material of a canal type earphone can be suitably used. Further, as shown in FIG. 8, the contact member 8 that similarly extends the thin metal wire 30 to the position of the ear hole and contacts the commercially available earplug such as sponge or rubber separately attached to the ear hole so as to be pressed from the outer surface. 7, and the contact member 8 is in contact with the earplug, so that, as with the mounting member 7 shown in FIG. It is possible to obtain a large and clear sound.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and can of course be implemented in various forms without departing from the gist of the present invention.

  Next, the results of a use evaluation test using bone conduction speaker samples (Examples and Comparative Examples) will be described.

(sample)
As an example, an annular wire (fine metal wire) is attached to the driver unit housing portion of the bone conduction stereo headphones (waterproof specification) “AUDIO BONE AQUA” manufactured by Golden Dance Co., Ltd. 1 and provided with an auxiliary vibration output unit (shown in FIGS. 1 to 3).
As a comparative example, “AUDIO BONE AQUA” was used as it was without providing an auxiliary vibration output unit.

(Use test)
A use test was performed on each sample.
The test was conducted by 6 panel (inspectors). Evaluation was performed on the following items.

Clear feeling: The clear feeling of the sound to be felt sounds very clear: From 5 points, the sound is cloudy: From 1 point to 1 point, it was evaluated by scoring in 5 stages.
Thickness: The thickness of the sound to be felt was very high: from 5 points to no feeling: 1 point was evaluated by scoring in 5 steps.
Brightness: The brightness of the sound to be felt was evaluated by scoring in five steps from bright: 5 points to not bright: 1 point.
Open feeling: About the open feeling of the sound, there was a feeling of opening: from 5 points to no: 1 point was evaluated by scoring in 5 stages.
Stability: The stability of the sound was evaluated by scoring in five steps from 5 points to unstable: 1 point.
High sound range: The sound quality of the high sound range was evaluated by scoring in five stages from good: 5 points to bad: 1 point.
Low sound range: The sound quality in the low sound range was evaluated by scoring in five stages from good: 5 points to bad: 1 point.

  As a result of the evaluation, an average value of the scores of the six persons was calculated for each of the above items. The evaluation results are shown in Table 1.

(General comments)
From Table 1, in all items of sound clearness, sound thickness, sound brightness, sound openness, sound stability, high-range sound quality, low-range sound quality, there are examples compared to comparative examples. Good results were obtained. In particular, the thickness of the sound and the sound quality in the low frequency range are increased by 50% or more, and it can be seen that the transmission on the low sound side is remarkably improved.

DESCRIPTION OF SYMBOLS 1 Bone conduction speaker 2 Main vibration output part 3 Auxiliary vibration output part 4 Ear 5 Head side surface 6 Headband 7 Insertion member 8 Contact member 10 Speaker main-body part 10b Concave spherical surface part 10c Case 11 Driver unit 11a Convex spherical shape Part 11c Case 12 Vibration surface 13 Tubular part 30 Metal thin wire 30d Middle part 40 Tragus H Bone conduction headphone device

Claims (4)

A bone conduction speaker incorporating a bone conduction driver for converting an acoustoelectric signal into mechanical vibration,
A main vibration output unit that is pressed against the side of the head in front of the user's ear and transmits the mechanical vibration of the bone conduction driver from the side position to the skull;
Auxiliary vibration that protrudes from the main vibration output section or its peripheral casing to the rear side, which is the ear side, and contacts the user's tragus or its vicinity to transmit mechanical vibration to the tragus cartilage. Ri Na and an output portion,
The auxiliary vibration output unit, the bone conduction speaker of the bent metal thin wire from the main vibration output unit or housing of the periphery thereof, wherein Rukoto such by projecting the rear side. Wherein an auxiliary vibration output section, arcuate or projecting in a hook shape formed by claim 1 Symbol mounting the bone conduction speaker. The bone conduction speaker according to claim 1 or 2 , wherein the auxiliary vibration output unit is provided with an insertion member to be inserted into the ear hole. A bone conduction headphone device comprising the bone conduction speaker according to any one of claims 1 to 3 provided at an end of a headband.

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