JP2008017398A - Bone conduction receiver - Google Patents

Bone conduction receiver Download PDF

Info

Publication number
JP2008017398A
JP2008017398A JP2006189084A JP2006189084A JP2008017398A JP 2008017398 A JP2008017398 A JP 2008017398A JP 2006189084 A JP2006189084 A JP 2006189084A JP 2006189084 A JP2006189084 A JP 2006189084A JP 2008017398 A JP2008017398 A JP 2008017398A
Authority
JP
Japan
Prior art keywords
bone conduction
vibration
receiver
conduction receiver
conduction speaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2006189084A
Other languages
Japanese (ja)
Other versions
JP4861079B2 (en
Inventor
Masahiko Fujita
Takayuki Kanai
Hideyuki Kawase
Yuji Nitobe
Katsuhiro Oi
Takashi Tsuji
勝広 多
英幸 川瀬
祐二 新渡戸
柾彦 藤田
剛史 辻
孝之 金井
Original Assignee
Nec Tokin Corp
Necトーキン株式会社
Ntt Docomo Inc
株式会社エヌ・ティ・ティ・ドコモ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nec Tokin Corp, Necトーキン株式会社, Ntt Docomo Inc, 株式会社エヌ・ティ・ティ・ドコモ filed Critical Nec Tokin Corp
Priority to JP2006189084A priority Critical patent/JP4861079B2/en
Publication of JP2008017398A publication Critical patent/JP2008017398A/en
Application granted granted Critical
Publication of JP4861079B2 publication Critical patent/JP4861079B2/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers; Analogous equipment at exchanges
    • H04M1/02Constructional features of telephone sets
    • H04M1/03Constructional features of telephone transmitters or receivers, e.g. telephone handsets, speakers or microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2460/00Details of hearing devices, i.e. of ear- or headphones covered by H04R1/10 or H04R5/033 but not provided for in any of their subgroups, or of hearing aids covered by H04R25/00 but not provided for in any of its subgroups
    • H04R2460/13Hearing devices using bone conduction transducers

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bone conduction receiver which can conduct the output oscillation of a bone conduction speaker efficiently. <P>SOLUTION: The bone conduction receiver 1 in this invention has a bone conduction speaker 10 which changes sound information to oscillation and a casing 2 which houses the bone conduction speaker 10. The bone conduction speaker 10 has a layered pillar-shaped piezoelectric element 12 which generates oscillation according to the sound information, and a putt 16 which conducts oscillation generated by the layered pillar-shaped piezoelectric element 12 to a human head in the state that it is projected from the casing 2 convexly and contacted with the human head. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bone conduction receiver using a bone conduction speaker.

  Traditionally, bone conduction receivers have been developed as bone conduction hearing aids. In recent years, bone conduction receivers are applied as man-machine interface devices that are connected to information devices such as mobile phone terminals and are used as sound information input / output devices (see, for example, Patent Document 1). Therefore, a bone conduction receiver used as an information device interface is required to accurately transmit sound information from an information device such as a mobile phone to the user. Furthermore, bone conduction receivers are required to reliably transmit user voice and operation information to information devices, and to be portable as devices connected to portable information devices.

In order to satisfy these requirements, a bone conduction receiver using a bone conduction speaker has been proposed. The bone conduction speaker transmits vibration information to the user by applying vibration to the human head and transmitting the vibration to the auditory organ. Such a bone conduction receiver can accurately transmit sound information to a person with a disability in the sound transmission part of the outer ear and the inner ear, compared to an air conduction speaker that transmits sound information by air vibration. Furthermore, since an air-conducting speaker is not used, there is no sound leakage to the surroundings and high confidentiality. Furthermore, since the auricles can be used in an open state and external sounds and alarm sounds can be heard, there is a feature that it is easy to obtain safety when used in crowds and noises.
Because of these features, it is desirable to use a bone conduction speaker for the bone conduction receiver. This bone conduction receiver accurately conveys sound information, has excellent portability, and can be used well by many users such as healthy people and some deaf people. Therefore, a bone conduction receiver using a bone conduction speaker is suitable for an input / output device such as an audio signal and is being used by a normal person and a deaf person.

In recent years, a bone conduction speaker made of a piezoelectric ceramic material has been proposed as a bone conduction speaker for a bone conduction receiver that is capable of accurately listening to sound information of a mobile phone and the like and having excellent portability. A laminated columnar piezoelectric element is used for this bone conduction speaker, and the displacement in the length direction of the laminated columnar piezoelectric element is expanded by a displacement amplification mechanism, and is transmitted from the vibration output unit to the contacting head. In addition, a sufficiently large mass is disposed in the fixed portion of the amplification mechanism, and the displacement of the fixed portion that is the fulcrum of the magnifying mechanism is suppressed as much as possible.
In particular, by adopting this bone conduction speaker as a bone conduction receiver, a large displacement can be secured in the vibration output portion, and at the same time, the vibration of the fixing portion can be kept small. Therefore, the sound leakage of the bone conduction receiver can be further reduced. Furthermore, the bone conduction speaker made of this piezoelectric ceramic material has low power consumption, can be used for a long time with the same battery, and is rich in portability.

When the stacked columnar piezoelectric element is incorporated in a portable device such as a bone conduction receiver or a handset, the appropriate length of the stacked columnar piezoelectric element is about 10 mm or less due to product size restrictions. The standard expansion / contraction amount of such a laminated columnar piezoelectric element of about 10 mm is about 2 μm to 3 μm, and it is difficult to obtain sufficient expansion / contraction for transmitting sound information.
Further, when this laminated columnar piezoelectric element is used as a power source and driven by a displacement amplification structure, a displacement expanded by a predetermined amount can be obtained at its output end. Thereby, sound information sufficient for the user's perception can be transmitted, but the sound information may not be sufficiently transmitted depending on the use posture. In addition, in the case of a structure that amplifies the displacement of the laminated columnar piezoelectric element, the size reduction and the light weight correspondence are not sufficient.

Furthermore, the conventional bone conduction receiver is a system in which the bone conduction speaker output unit is brought into contact with the face of the user. For this reason, in the propagation path of vibration generated by the laminated columnar piezoelectric element of the bone conduction receiver, structural loss of the bone conduction speaker and loss due to contact between the output portion and the face occur. The structural loss of the bone conduction speaker can be reduced by sufficiently increasing the mass of the bone conduction speaker fixing portion. On the other hand, it is difficult to sufficiently reduce the loss associated with contact with the face.
JP 2006-86581 A

As described above, in the conventional bone conduction receiver, since the bone conduction speaker and the face come into contact with each other, loss of the output vibration of the bone conduction speaker occurs, and therefore, there is a problem that the output vibration of the bone conduction speaker cannot be efficiently transmitted. there were.
This invention is made | formed in view of such a subject, and it aims at providing the bone conduction receiver which can transmit the output vibration of a bone conduction speaker efficiently.

  A bone conduction receiver according to the present invention is a bone conduction receiver including a bone conduction speaker that converts sound information into vibration, and a case that houses the bone conduction speaker, wherein the bone conduction speaker includes the sound information. Vibration generating means for generating vibrations in response to the vibration generating means, and a vibration transmitting portion that protrudes in a convex shape from the case and transmits the vibration generated by the vibration generating means to the human head in contact with the human head. Is. In such a configuration, the vibration transmitting portion protruding from the case reliably contacts the face, so that the output vibration of the bone conduction speaker can be transmitted efficiently.

  Further, the vibration transmission unit has a shape that is bent in a substantially U-shape, and the vibration generating means is disposed in the vicinity of a surface different from the two surfaces between two opposed surfaces of the vibration transmission unit, A vibration is generated between the two facing surfaces according to the sound information. Thereby, the part far from the vibration center of the vibration transmission part which a vibration generation means vibrates can be vibrated more.

  Furthermore, the convex peak portion protruding in the vibration transmitting portion is disposed on the side farther from the position of the vibration generating means than the center of the vibration transmitting portion. As a result, the peak portion on the side away from the position of the vibration generating means can be further vibrated, so that the output vibration can be efficiently transmitted through the peak portion.

  Furthermore, the end portion that vibrates in the vibration transmitting portion is disposed closer to the end surface than the center of the bone conduction receiver. Thereby, the vibrating end can be further vibrated, so that the transmission efficiency of the output vibration can be increased.

  Preferably, the vibration transmission unit includes a frame bent in a substantially U-shape, and a pad disposed on one of two opposed surfaces of the frame and abutting on the human body head. Are exposed in a state protruding from the case in a convex shape. Thereby, since the part which contacts a face is comprised with a pad, the contact property with a face can be changed easily.

  Preferably, the vibration generating means is a stacked columnar piezoelectric element.

  On the other hand, a bone conduction receiver according to the present invention is a bone conduction receiver comprising a bone conduction speaker that converts sound information into vibration and a case that houses the bone conduction speaker. A frame that is bent in a letter shape, and a vibration generating means that is arranged between two opposing surfaces of the frame and generates vibration between the two opposing surfaces in accordance with the sound information; And a pad that is disposed on one surface of the surface and is exposed in a state of protruding from the case. In such a configuration, the vibration transmitting portion protruding from the case reliably contacts the face, so that the output vibration of the bone conduction speaker can be transmitted efficiently.

  ADVANTAGE OF THE INVENTION According to this invention, the bone conduction receiver which can transmit the output vibration of a bone conduction speaker efficiently can be provided.

The bone conduction receiver according to the present invention has a structure using a bone conduction speaker that converts sound information such as voice and music into vibration. The bone conduction speaker transmits the vibration obtained by converting the sound information to a part of the human head, and transmits the vibration to the auditory organ, thereby recognizing the sound information.
Specifically, in the bone conduction receiver according to the present invention, the contact state between the bone conduction speaker and the face, the structure of the contact portion of the bone conduction speaker, the mounting method, and the like are devised. By this device, a structure in which the vibration generated in the stacked columnar piezoelectric element is more effectively transmitted to the auditory organ through the user's skin regardless of the contact state.
Embodiments of the present invention will be described below with reference to the drawings.

First, the whole structure of the bone conduction receiver which concerns on this invention is demonstrated using FIG. FIG. 1 is a perspective view showing a configuration of a bone conduction receiver according to the present invention.
As shown in FIG. 1, the bone conduction receiver 1 of the present invention includes a bone conduction speaker 10, a call button 21, a volume switch 22, an LED 23, a microphone 31, a main body case 2, a flip 3, and a connection cable 4.

The bone conduction speaker 10 converts an electrical signal sent from the mobile phone via the connection cable 4 into mechanical vibration. The call button 21 controls the start of the call of the bone conduction receiver 1 and the end of the call. The volume switch 22 adjusts the volume of the bone conduction speaker 10. The LED 23 notifies of an incoming call or the like by turning on or the like. The microphone 31 picks up the user's voice.
The main body case 2 houses the bone conduction speaker 10, the call button 21, the volume changeover switch 22, the LED 23 and the like of the bone conduction receiver 1. Although not shown, a circuit board for processing an electrical signal from a mobile phone (not shown) and an operation signal of the call button 21 is also supported and accommodated inside the main body case 2. The flip 3 houses the microphone 31. The hinge 24 pivotally supports the flip 3 on the main body case 2. The connection cable 4 connects the cellular phone and the bone conduction receiver 1 by connecting the connector 4a to the cellular phone (not shown).

Next, the structure of the bone conduction speaker 10 which is the most basic of the bone conduction receiver 1 of the present invention will be described with reference to FIG. FIG. 2 is a schematic cross-sectional view showing the bone conduction speaker 10.
As shown in FIG. 2, the bone conduction speaker 10 is assembled around a frame 11 having a substantially U-shaped cross section. The frame 11 has a frame structure formed by three parts of a vibration output part 11b, an elastic part 11b, and a frame fixing part 11c. The frame 11 is formed in a substantially U-shaped cross section by pressing a metal plate member.
Specifically, the vibration output unit 11a for outputting vibration is disposed on one side of the U-shaped frame 11, and its mass is reduced as much as possible. Ribs for improving the rigidity of the vibration output portion 11a are provided downward on both side ends of the vibration output portion 11a. The flat elastic portion 11b supports the vibration output portion 11a and the lower portion thereof is supported by the frame fixing portion 11c. The frame fixing part 11c is arranged on the other side of the U-shaped frame 11 facing the vibration output part 11a. Ribs 11 cc for improving the rigidity of the frame fixing part 11 c are provided downward on both side ends of the frame fixing part 11 c.

The stacked columnar piezoelectric element 12 has a characteristic of being displaced in the longitudinal direction, and is disposed between two opposing surfaces of the vibration output portion 11a and the frame fixing portion 11c. The upper end of the laminated columnar piezoelectric element 12 is in contact with the vibration output portion 11a of the frame 11 and is fixed by an adhesive (not shown) so as not to be displaced. This adhesive (not shown) is made of a material having a lower Young's modulus than the frame 11 and the stacked columnar piezoelectric element 12.
The lower end of the stacked columnar piezoelectric element 12 is in contact with the end face of the pressurizing screw 15b, and the pressurizing screw 15b is screwed into a screw hole provided in the frame fixing portion 11c. The four side surfaces at the lower end of the stacked columnar piezoelectric element 12 are regulated by the holes of the positioning plate 18 and fixed together with an adhesive (not shown) after the pressurizing operation. Further, the input line of the laminated columnar piezoelectric element 12 passes through the lower part of the elastic part 11 b and is connected to a drive circuit board (not shown) housed in the body case of the bone conduction receiver 1.

  A base weight 13 is provided in the inner space of the U-shaped frame 11 structure. The base weight 13 is sandwiched between the positioning plate 18 and the frame fixing portion 11c, and in this state, is fixed to the frame fixing portion 11c by screws 15a. The frame fixing portion 11c, the positioning plate 18, the base weight 13, and the screw 15a constitute a fixing portion 14. The total mass of the fixed portion 14 may be set to at least twice as large as the total mass of the vibration output portion 11a and the pad 16, ideally 10 times or more. Further, the base weight 13 and the positioning plate 18 may be an integrated component structure.

  In the basic structure described above, the pad 16 is provided on the vibration output portion 11a. The vibration output unit 11a and the pad 16 constitute a vibration transmission unit 11d that transmits the vibration generated by the stacked columnar piezoelectric element 12. Ideally, the vibration output portion 11a and the pad 16 have a structure having as small a mass as possible and having high rigidity. The vibration output unit 11a and the pad 16 rotate and vibrate on the basis of the rotation center of the vibration output unit 11a generated near the intersection of the vibration output unit 11a and the elastic unit 11b. Therefore, the elastic part 11b has a function of a hinge that rotatably supports the vibration output part 11a. Further, the elastic portion 11b has a function of generating a force for applying a pressure to the stacked columnar piezoelectric element 12, and has a function as a spring of the vibrating body in addition to these functions. Moreover, the frame fixing | fixed part 11c can suppress the vibration of the fixing | fixed part 14 by obtaining larger mass as a whole fixed support part with the base weight 13, the positioning plate 18, etc. FIG.

When the bone conduction receiver 1 is used, the vibration output unit 11a has a function of contacting the face near the auricle and vibrating the contacting face by the vibration operation. Therefore, the vibration output part 11a requires good contact with the face with respect to the features of the elastic part 11b.
Therefore, a pad 16 is provided on the upper surface of the vibration output portion 11a, and the pad 16 is made of a material having low thermal conductivity, low specific gravity, and high rigidity. The pad 16 is fixed in a highly rigid state after positioning by fitting the positioning hole and boss. When the vibration output unit 11a and the pad 16 are weakly fixed, a secondary vibration is generated between them, and harsh sound information having the secondary vibration is transmitted to the user.
Here, the reason why a material having low thermal conductivity is used for the pad 16 is to reduce the “coldness” when the metal part of the vibration output part 11a cools down such as early morning in winter and directly hits the face. The reason why the material is low in specific gravity and high in rigidity is to increase the amplitude by reducing the mass of the vibration part and to prevent the occurrence of secondary vibration in the vibration output part 11a due to the high rigidity.

Then, the attachment state of the bone conduction speaker 10 to the bone conduction receiver 1 is demonstrated using FIG. FIG. 3 is a schematic cross-sectional view showing an attachment state of the bone conduction speaker 10.
As shown in FIG. 3, the bone conduction speaker 10 is held by ribs 2a, 2b, 2c, and 2d of the case 2 via support members 25a and 25b. The support members 25 a and 25 b are made of a viscoelastic material and have a function of absorbing the vibration of the fixed portion 14. Specifically, when vibration is generated by the bone conduction speaker 10, the vibration is transmitted from the vibration output unit 11a to the user's head via the pad 16 and transmitted. The fixing portion 14 vibrates due to a reaction force against the vibration (acting force) transmitted to the head, and the support members 25a and 25b absorb this vibration. Here, the viscoelastic material is a member having both viscosity and elasticity, for example, a silicon rubber member having a hardness of 5 degrees or less, a gel-like material based on silicon, or the like.

  A pad 16 is attached to the vibration output portion 11 a of the bone conduction speaker 10. The pad 16 is very important as an interface for transmitting vibration to the user. In the bone conduction receiver 1, the pad 16 of the bone conduction speaker 10 directly contacts the skin of the user's head, and transmits the vibration of the vibration output unit 11a to the user's auditory organ through the skin of the contact part. The pad 16 is made of a material having a low thermal conductivity, a low specific gravity, and a high rigidity. On the other hand, the head has a structure in which the top of the skull 51 is covered with soft skin 52. As shown in FIG. 4, the contact structure between the pad 16 and the head has a sandwich structure in which the hard pad 16, the soft skin 52, and the hard skull 51 are sandwiched.

In this sandwich structure, the skin 52 shows a soft part existing between the epidermis and the skull 51, and has softness and its mass. The softness of the skin 52 is physically viscoelastic and can be broken down into viscous and elastic. A circuit model equivalent to this sandwich structure is shown in FIG.
As shown in FIG. 5, in the signal (vibration) transmission system from the pad 16 to the skull 51, the contact a corresponds to the pad 16 and is a contact to which a signal is input. The transmission system elements of the skin 52 connected to the contact a are skin viscosity 52a, skin elasticity 52b, and skin mass 52c. The contact b corresponds to the skull 51 and is a contact that serves as a signal output. The contact b is also connected with skin viscosity 52a, skin elasticity 52b, and skin mass 52c. In this equivalent circuit model, in order to transmit the vibration as a signal to a greater extent, that is, to transmit it without being attenuated, it is to reduce the impedance of the transmission system. Specifically, the viscosity 52a and the mass 52c are reduced, and the elasticity 52b is increased.

  The reduction of impedance in the equivalent circuit model will be specifically described with reference to FIG. 4 in the contact state between the bone conduction receiver 1 and the head. As shown in FIG. 4, when the pad 16 comes into contact with the skin 52, a convex surface is formed so as to bite into the skin 52 with which the contact surface 16 a of the pad 16 comes into contact. At the time of use, the user applies the pad 16 of the bone conduction receiver 1 to the facial skin 52 near the pinna. Then, the convex contact surface 16 a formed by the pad 16 is slightly pushed into the skin 52 of the user's face, and the user's skin 52 forms a recess along the surface of the convex pad 16. By this series of operations, the convex contact surface 16a of the pad 16 and the concave portion of the skin 52 are closely fitted.

  FIG. 6 shows the pressure distribution between the pad 16 and the skin 52 to be fitted. In the pad 16, the peak 16 b of the convex contact surface 16 a is most greatly pressed into the skin 52, and the contact pressure becomes the highest (pressure center). In the high pressure portion (pressure center) due to the contact, the soft skin 52 spreads laterally due to the contact pressure, and a part thereof spatially moves to the periphery. At the same time, the peripheral portion having a low contact force causes the skin to move to a non-contact portion having a lower pressure due to the contact force. As a result, the skin 52 receives the highest contact pressure at the portion (center of pressure) where the convex contact surface 16a of the pad 16 is most eroded, and the contact pressure decreases toward the periphery of this most engulfed portion.

The contact portion between the pad 16 and the skin 52 will be described in more detail in the equivalent circuit model shown in FIG.
The skin 52 of the high pressure portion is the portion (center of pressure) corresponding to the peak 16b of the convex contact surface 16a in the pad 16 and compressed most by being pushed in the direction of the skull 51. Along with this compression, the skin tissue at the center of pressure receives a higher pressure than the peripheral portion, and the soft skin tissue spreads laterally. At the same time, the liquid (body fluid) in the skin tissue moves to the periphery. As a result, the constituent volume of the skin tissue is reduced most.
Physically, mass and viscosity are reduced because the ratio of liquid and the like is reduced, and elasticity is increased because skin tissue is hardened. In the equivalent circuit model shown in FIG. 5, the impedance of the transmission system is reduced and the transmission is improved. That is, the vibration is transmitted more effectively at the portion where the contact pressure is increased by the contact between the pad 16 and the skin 52, and the vibration is transmitted most effectively near the pressure center.

  Since the contact pressure is lower in the periphery of the pressure center than in the pressure center, there is little decrease in mass and increase in elasticity. However, in this periphery, there is a sufficiently large change compared to the non-contact portion. Occurs and vibrations are transmitted. In order to effectively transmit vibration to the user's sensory part through contact due to the above-described skin characteristics, it is desirable to employ a contact structure that increases the contact pressure within a range in which the user does not become uncomfortable.

As shown in FIG. 2, the bone conduction speaker 10 of the bone conduction receiver 1 according to the present invention inserts a laminated columnar piezoelectric element 12 into a frame formed in a U-shape, and displaces the laminated columnar piezoelectric element 12. It has a structure that expands by applying the principle of lever. The displacement of the laminated columnar piezoelectric element 12 causes the vibration output unit 11a to rotate and vibrate with the rotation center of the vibration output unit 11a generated near the intersection of the vibration output unit 11a and the elastic portion 11b as a reference (origin).
On the vibration output unit 11a, the degree of amplification of the displacement of the vibration output unit 11a increases as the distance from the rotation reference increases. In contrast, the displacement of the vibration output unit 11a is larger than the displacement of the single layered columnar piezoelectric element 12 at a position away from the layered columnar piezoelectric element 12, and the displacement of the vibration output unit 11a farthest from the rotation center. Maximum at the tip.

Thus, in the bone conduction speaker 10 according to the present invention, the peak 16b of the convex contact surface 16a serving as the pressure center of the pad 16 is closer to the tip 16c side than the central portion in the longitudinal direction of the pad 16 as viewed from the center of rotation. Is arranged. By adopting this structure, a large displacement can be secured at the peak 16b of the convex contact surface 16a of the pad 16. At the same time, the effect that the pad 16 has a convex shape can be used, so that the vibration of the laminated columnar piezoelectric element 12 can be effectively transmitted to the perception unit of the user.
Furthermore, in the bone conduction speaker 10 of the bone conduction receiver 1 according to the present invention, as shown in FIG. 3, the center of rotation of the vibration output portion 11 a is disposed on the center side of the bone conduction receiver 1. At the same time, the distal end of the vibration output unit 11a that is displaced (shakes) more than when the vibration output unit 11a is operated is disposed on the distal end 20 side of the body case 2 of the bone conduction receiver 1. Therefore, the vibration in the bone conduction speaker 10 can be more effectively transmitted to the user's perception unit.

The utilization posture of the bone conduction receiver 1 according to the present invention will be described with reference to FIG.
As shown to Fig.7 (a), the ideal utilization attitude | position of the bone conduction receiver 1 of this invention is a case where it arrange | positions substantially parallel with respect to the face 52a. However, it is assumed that the use posture of the bone conduction receiver 1, particularly the contact angle with the face, varies greatly depending on the user.
Specifically, first, there is an ideal contact state in which the bone conduction receiver 1 and the face 52a illustrated in FIG. From this state, as shown in FIG. 7B, a contact state in which the face 52a and the bone conduction receiver 1 contact with a slight inclination is assumed. Furthermore, as shown in FIG.7 (c), the contact state where the face 52a and the bone conduction receiver 1 contact | abut with a big inclination is assumed.

  Thus, there are various contact states that differ depending on the user. In the bone conduction receiver 1 according to the present invention, the peak 16b of the convex contact surface 16a of the pad 16 is disposed on the distal end 20 side of the bone conduction receiver 1 from the center portion of the pad portion 16. As a result, stable contact between the peak 16b of the convex contact surface 16a of the pad 16 and the user's face can be ensured, and vibration can be reliably transmitted to the user's perception unit.

Finally, the use of the bone conduction receiver 1 according to the present invention will be described with reference to FIG. FIG. 8 is a schematic view showing a utilization state of the bone conduction receiver 1 according to the present invention. Here, description will be made with reference to FIG.
As shown in FIG. 8, when the bone conduction receiver 1 is used, it is convenient to connect the connection cable 4 to a mobile phone (not shown) in advance. In this state, for example, when the mobile phone receives a call from another phone, the user opens the flip 3 and presses the call button 21. Then, an electrical signal of sound information such as a call voice is transmitted from a mobile phone (not shown) connected to the bone conduction receiver 1 to the circuit board in the body case 2 of the bone conduction receiver 1 through the connection cable 4. This electrical signal is applied as an AC signal from the circuit board to the stacked columnar piezoelectric element 12 shown in FIG. 2 via an input line. The laminated columnar piezoelectric element 12 performs expansion / contraction variation (displacement) corresponding to the signal in the longitudinal axis direction by the electric signal.

  The vibration output portion 11a and the frame fixing portion 11c of the frame 11 continue to be displaced from each other with the bending deformation of the elastic portion 11b due to the expansion and contraction of the stacked columnar piezoelectric element 12. As shown in FIG. 2, the bone conduction speaker 10 according to the present invention incorporates a structure utilizing the principle of leverage. Therefore, even when the expansion / contraction amount of the single layered columnar piezoelectric element 12 is about 2 μm to 3 μm, the displacement of the pad 16 attached to the vibration output unit 11a is enlarged by the designed predetermined value. As a result, sufficient vibration is transmitted to the user's perception unit and recognized as sound information.

  Further, at this time, it is assumed that the user brings the bone conduction receiver 1 into contact with the user's head while being largely inclined as shown in FIG. Also in this case, the contact surface 16a of the pad 16 fixed to the vibration output portion 11a of the bone conduction receiver 1 is a convex shape having a peak 16b on the tip end side rotating with respect to the rotation center of the pad 16. Form. Therefore, even if the bone conduction receiver 1 is in contact with the user's head in a greatly inclined state, vibration is effectively transmitted to the user.

  When the bone conduction speaker 10 of the bone conduction receiver 1 according to the present invention operates, the vibration output portion 11a and the frame fixing portion 11c perform a displacement vibration operation in a direction in which the distal end side thereof opens and closes. At this time, the mass of the vibration output portion 11a and the pad 16 is sufficiently smaller than the total mass of the fixing portion 14 in which the positioning plate 18, the base weight 13, the frame fixing portion 11c, the screw 15, and the like are integrated. Therefore, the expansion / contraction displacement generated in the laminated columnar piezoelectric element 12 mainly displaces the vibration output unit 11a. In other words, the vibration generated in the laminated columnar piezoelectric element 12 can intensively drive the vibration output unit 11a and transmit a signal to the user.

  Further, since the mass of the fixed portion 14 on the side supported by the main body case 2 is large, vibration generated in the laminated columnar piezoelectric element 12 is mainly emitted from the vibration output portion 11a. There is little vibration. Further, a support member 25 made of a viscoelastic material is provided between the frame fixing portion 11 c and the case 2. Therefore, the vibration generated in the laminated columnar piezoelectric element 12 and transmitted to the frame fixing portion 11 c is attenuated by the support member 25 and then propagates to the main body case 2. Therefore, the vibration transmitted to the main body case 2 is small, and the volume leaking from the main body case 2 to the outside, particularly the surrounding air, can be reduced to a very low level that does not cause a problem. Thereby, sound leakage can be prevented. Further, this sound leakage reduction effect corresponds to the total mass of the fixed portion 14, and the larger the mass, the greater the effect. However, this effect is set in consideration of the size and weight of the product.

As described above, according to the bone conduction receiver 1 according to the present invention, the generated vibration can be concentrated on the vibration output unit 11a even when the stacked columnar piezoelectric element 12 having a small displacement is used. As a result, vibrations caused by the stacked columnar piezoelectric element 12 can be efficiently transmitted to the user's head, and a necessary sound volume can be sufficiently ensured.
Furthermore, the amount of vibration transmitted to the case, which causes an increase in sound leakage, can be reduced with a relatively simple structure, and a sound leakage reduction effect of the required level can be achieved without using a special leakage sound containment structure. can get. Moreover, it becomes possible to reduce the influence of a user's utilization posture by arrange | positioning the front-end | tip of the vibration output part 11a to the front-end | tip 20 side of the bone conduction receiver 1. FIG.

  Thus, according to the present invention, loss due to contact with the face can be improved, and the output vibration of the bone conduction speaker having the displacement amplification structure can be more rationally transmitted to the user's hearing. . Therefore, in the bone conduction receiver 1 according to the present invention, compared with other bone conduction speakers using the same stacked columnar piezoelectric element, a larger vibration can be transmitted to the user's auditory organ, which is easier to use. A conduction receiver can be realized.

It is a perspective schematic diagram which shows the external appearance of the bone conduction receiver which concerns on this invention. It is a cross-sectional schematic diagram of the bone conduction speaker in the bone conduction receiver according to the present invention. It is a cross-sectional schematic diagram which shows the attachment state of the bone conduction speaker in the bone conduction receiver which concerns on this invention. It is a cross-sectional schematic diagram which shows the contact state of the bone-conduction receiver which concerns on this invention, and a head. It is a schematic diagram which shows the equivalent circuit model of the skin in the contact part of the bone conduction receiver which concerns on this invention, and a head. It is a figure which shows the contact pressure distribution in the contact state of the pad and head of the bone conduction receiver which concerns on this invention. It is a schematic diagram which shows the utilization attitude | position with the bone conduction receiver which concerns on this invention, and a head. It is a schematic diagram which shows the utilization attitude | position of the bone conduction receiver which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Bone conduction receiver, 2 ... Main body case, 2a, 2b, 2c, 2d ... Rib, 3 ... Flip,
4 ... Connection cable, 4a ... Connector, 10 ... Bone conduction speaker, 11 ... Frame,
11a: Vibration output section, 11b: Elastic section, 11c: Frame fixing section, 11d: Vibration transmission section,
12 ... Stacked columnar piezoelectric element, 13 ... Base weight, 14 ... Fixed part, 15a, 15b ... Pressurizing screw,
16 ... Pat, 16a ... Convex contact surface, 16b ... Peak, 18 ... Positioning plate,
21 ... Call button, 22 ... Volume switch, 23 ... LED, 24 ... Hinge,
25a, 25b ... support member, 31 ... microphone 51 ... skull, 52 ... skin, 52a ... skin viscosity, 52b ... skin elasticity,
52c ... mass of skin

Claims (7)

  1. A bone conduction speaker that converts sound information into vibration;
    A bone conduction receiver comprising a case for housing the bone conduction speaker,
    The bone conduction speaker is
    Vibration generating means for generating vibration according to the sound information;
    A bone conduction receiver having a vibration transmitting portion that protrudes from the case in a convex shape and transmits the vibration generated by the vibration generating means to the human head while in contact with the human head.
  2. The vibration transmitting portion has a shape bent in a substantially U shape,
    The vibration generating means is disposed in the vicinity of a surface different from the two surfaces between the two opposing surfaces in the vibration transmitting unit, and generates vibration between the two opposing surfaces according to the sound information. The bone conduction receiver according to claim 1, wherein
  3.   The bone according to claim 1 or 2, wherein the convex peak portion protruding in the vibration transmitting portion is disposed on a side farther from the position of the vibration generating means than the center of the vibration transmitting portion. Conductive receiver.
  4.   The bone conduction receiver according to any one of claims 1 to 3, wherein the vibration generating means is disposed closer to the end surface than the center of the bone conduction receiver.
  5. The vibration transmission unit is
    A frame bent in a substantially U shape,
    A pad disposed on one of the two opposing surfaces of the frame and contacting the human head;
    The bone conduction receiver according to any one of claims 1 to 4, wherein the pad is exposed in a state of protruding from the case in a convex shape.
  6.   The bone conduction receiver according to any one of claims 1 to 5, wherein an end portion that vibrates in the vibration transmitting portion is a stacked columnar piezoelectric element.
  7. A bone conduction speaker that converts sound information into vibration;
    A bone conduction receiver comprising a case for housing the bone conduction speaker,
    The bone conduction speaker is
    A frame bent in a substantially U shape,
    A vibration generating means disposed between two opposing surfaces in the frame, and generating vibration between the two opposing surfaces according to the sound information;
    A bone conduction receiver having a pad that is disposed on one of two opposing surfaces of the frame and is exposed in a state of protruding from the case.
JP2006189084A 2006-07-10 2006-07-10 Bone conduction receiver Expired - Fee Related JP4861079B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006189084A JP4861079B2 (en) 2006-07-10 2006-07-10 Bone conduction receiver

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006189084A JP4861079B2 (en) 2006-07-10 2006-07-10 Bone conduction receiver
PCT/JP2007/063730 WO2008007666A1 (en) 2006-07-10 2007-07-10 Bone conduction receiver

Publications (2)

Publication Number Publication Date
JP2008017398A true JP2008017398A (en) 2008-01-24
JP4861079B2 JP4861079B2 (en) 2012-01-25

Family

ID=38923225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006189084A Expired - Fee Related JP4861079B2 (en) 2006-07-10 2006-07-10 Bone conduction receiver

Country Status (2)

Country Link
JP (1) JP4861079B2 (en)
WO (1) WO2008007666A1 (en)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010068176A (en) * 2008-09-10 2010-03-25 Nec Tokin Corp Acoustic signal generating apparatus
JP2012191244A (en) * 2011-02-23 2012-10-04 Yuji Hosoi Voice transmitting/receiving unit
JP2014082792A (en) * 2012-05-01 2014-05-08 Kyocera Corp Electronic apparatus
US8918149B2 (en) 2010-12-27 2014-12-23 Rohm Co., Ltd. Mobile telephone
JPWO2013084595A1 (en) * 2011-12-06 2015-04-27 株式会社テムコジャパン Mobile phone using bone conduction device
US9131300B2 (en) 2012-03-28 2015-09-08 Kyocera Corporation Electronic device
US9143867B2 (en) 2012-03-29 2015-09-22 Kyocera Corporation Electronic device
US9191748B2 (en) 2012-04-26 2015-11-17 Kyocera Corporation Electronic device
US9191749B2 (en) 2012-04-12 2015-11-17 Kyocera Corporation Electronic device that vibrates an element for sound transmission
US9204223B2 (en) 2012-04-12 2015-12-01 Kyocera Corporation Electronic device
US9300770B2 (en) 2012-04-10 2016-03-29 Kyocera Corporation Electronic device
US9313306B2 (en) 2010-12-27 2016-04-12 Rohm Co., Ltd. Mobile telephone cartilage conduction unit for making contact with the ear cartilage
US9392097B2 (en) 2010-12-27 2016-07-12 Rohm Co., Ltd. Incoming/outgoing-talk unit and incoming-talk unit
US9479624B2 (en) 2012-01-20 2016-10-25 Rohm Co., Ltd. Mobile telephone
US9485559B2 (en) 2011-02-25 2016-11-01 Rohm Co., Ltd. Hearing system and finger ring for the hearing system
US9705548B2 (en) 2013-10-24 2017-07-11 Rohm Co., Ltd. Wristband-type handset and wristband-type alerting device
US9729971B2 (en) 2012-06-29 2017-08-08 Rohm Co., Ltd. Stereo earphone
US9742887B2 (en) 2013-08-23 2017-08-22 Rohm Co., Ltd. Mobile telephone
US10013862B2 (en) 2014-08-20 2018-07-03 Rohm Co., Ltd. Watching system, watching detection device, and watching notification device
US10356231B2 (en) 2014-12-18 2019-07-16 Finewell Co., Ltd. Cartilage conduction hearing device using an electromagnetic vibration unit, and electromagnetic vibration unit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2945905B1 (en) * 2009-05-20 2011-07-29 Elno Soc Nouvelle Acoustic device
US8521239B2 (en) 2010-12-27 2013-08-27 Rohm Co., Ltd. Mobile telephone

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003348208A (en) * 2002-05-29 2003-12-05 Temuko Japan:Kk Portable telephone set provided with bone-conduction speaker
WO2005069586A1 (en) * 2004-01-16 2005-07-28 Temco Japan Co., Ltd. Portable telephone using bone conduction device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003348208A (en) * 2002-05-29 2003-12-05 Temuko Japan:Kk Portable telephone set provided with bone-conduction speaker
WO2005069586A1 (en) * 2004-01-16 2005-07-28 Temco Japan Co., Ltd. Portable telephone using bone conduction device

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010068176A (en) * 2008-09-10 2010-03-25 Nec Tokin Corp Acoustic signal generating apparatus
US9894430B2 (en) 2010-12-27 2018-02-13 Rohm Co., Ltd. Incoming/outgoing-talk unit and incoming-talk unit
US9392097B2 (en) 2010-12-27 2016-07-12 Rohm Co., Ltd. Incoming/outgoing-talk unit and incoming-talk unit
US8918149B2 (en) 2010-12-27 2014-12-23 Rohm Co., Ltd. Mobile telephone
US9313306B2 (en) 2010-12-27 2016-04-12 Rohm Co., Ltd. Mobile telephone cartilage conduction unit for making contact with the ear cartilage
US9716782B2 (en) 2010-12-27 2017-07-25 Rohm Co., Ltd. Mobile telephone
JP2012191244A (en) * 2011-02-23 2012-10-04 Yuji Hosoi Voice transmitting/receiving unit
US9980024B2 (en) 2011-02-25 2018-05-22 Rohm Co., Ltd. Hearing system and finger ring for the hearing system
US9485559B2 (en) 2011-02-25 2016-11-01 Rohm Co., Ltd. Hearing system and finger ring for the hearing system
JPWO2013084595A1 (en) * 2011-12-06 2015-04-27 株式会社テムコジャパン Mobile phone using bone conduction device
US9479624B2 (en) 2012-01-20 2016-10-25 Rohm Co., Ltd. Mobile telephone
US10158947B2 (en) 2012-01-20 2018-12-18 Rohm Co., Ltd. Mobile telephone utilizing cartilage conduction
US10079925B2 (en) 2012-01-20 2018-09-18 Rohm Co., Ltd. Mobile telephone
US9131300B2 (en) 2012-03-28 2015-09-08 Kyocera Corporation Electronic device
US9591389B2 (en) 2012-03-28 2017-03-07 Kyocera Corporation Electronic device
US9143867B2 (en) 2012-03-29 2015-09-22 Kyocera Corporation Electronic device
US9300770B2 (en) 2012-04-10 2016-03-29 Kyocera Corporation Electronic device
US9191749B2 (en) 2012-04-12 2015-11-17 Kyocera Corporation Electronic device that vibrates an element for sound transmission
US9204223B2 (en) 2012-04-12 2015-12-01 Kyocera Corporation Electronic device
US9191748B2 (en) 2012-04-26 2015-11-17 Kyocera Corporation Electronic device
US9510105B2 (en) 2012-04-26 2016-11-29 Kyocera Corporation Electronic device
JP2014082792A (en) * 2012-05-01 2014-05-08 Kyocera Corp Electronic apparatus
US9131299B2 (en) 2012-05-01 2015-09-08 Kyocera Corporation Electronic device
US9729971B2 (en) 2012-06-29 2017-08-08 Rohm Co., Ltd. Stereo earphone
US10506343B2 (en) 2012-06-29 2019-12-10 Finewell Co., Ltd. Earphone having vibration conductor which conducts vibration, and stereo earphone including the same
US9742887B2 (en) 2013-08-23 2017-08-22 Rohm Co., Ltd. Mobile telephone
US10237382B2 (en) 2013-08-23 2019-03-19 Finewell Co., Ltd. Mobile telephone
US10075574B2 (en) 2013-08-23 2018-09-11 Rohm Co., Ltd. Mobile telephone
US10103766B2 (en) 2013-10-24 2018-10-16 Rohm Co., Ltd. Wristband-type handset and wristband-type alerting device
US9705548B2 (en) 2013-10-24 2017-07-11 Rohm Co., Ltd. Wristband-type handset and wristband-type alerting device
US10013862B2 (en) 2014-08-20 2018-07-03 Rohm Co., Ltd. Watching system, watching detection device, and watching notification device
US10380864B2 (en) 2014-08-20 2019-08-13 Finewell Co., Ltd. Watching system, watching detection device, and watching notification device
US10356231B2 (en) 2014-12-18 2019-07-16 Finewell Co., Ltd. Cartilage conduction hearing device using an electromagnetic vibration unit, and electromagnetic vibration unit

Also Published As

Publication number Publication date
WO2008007666A1 (en) 2008-01-17
JP4861079B2 (en) 2012-01-25

Similar Documents

Publication Publication Date Title
US7512425B2 (en) Portable telephone using bone conduction device
CN102959930B (en) Mobile phone
JP2004187031A (en) Mobile phone using bone conduction speaker
JP2012249097A (en) Speech output device
US20040202344A1 (en) Method and apparatus for tooth bone conduction microphone
KR101836023B1 (en) Stereo earphone
JP4118934B2 (en) Glasses type communication device
KR101176827B1 (en) Audio apparatus
CN101795143B (en) Bone-conduction microphone built-in headset
US20100225600A1 (en) Display Structure with Direct Piezoelectric Actuation
JP4541111B2 (en) Method of using bone conduction speaker and method of using bone conduction receiver
JP2013255212A (en) Telephone call device
KR101863831B1 (en) Portable telephone having cartilage conduction section
US8842870B2 (en) Audio apparatus
US20020012441A1 (en) Body set type speaker unit
US8005249B2 (en) Ear canal signal converting method, ear canal transducer and headset
CN1929700B (en) Piezoelectric device for generating acoustic signals
JP2007505540A6 (en) Audio equipment
EP0640263A1 (en) Bone conductive ear microphone and method
JP2005348193A (en) Receiver
US20160183017A1 (en) Transducer devices and methods for hearing
US20060018488A1 (en) Bone conduction systems and methods
JP4401396B2 (en) Sound output device
TWI604714B (en) mobile phone
JP5676003B2 (en) Portable electronic devices

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090216

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110614

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110805

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20111018

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20111104

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20141111

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313117

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

S533 Written request for registration of change of name

Free format text: JAPANESE INTERMEDIATE CODE: R313533

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

LAPS Cancellation because of no payment of annual fees