JP4810487B2 - Handset and telephone - Google Patents

Description

  The present invention relates to a handset and a telephone that enable a call under high noise.

  In general, emergency telephones are installed at certain distances on the side of roads and the like as emergency communication means in highways and tunnels. Similarly, in the railway, as a means of emergency communication, a telephone along the railway line is installed every certain distance.

  In such an emergency telephone or a telephone along the line, it is desirable to store the telephone in a box, but since a large installation space cannot be secured, only the telephone is often installed. In this case, a call must be made in the surrounding noise.

  It is the same that the engine room of a ship must be used under high noise.

  However, when making a call in a high noise environment such as an expressway, a tunnel, or a ship engine room, it is difficult to make a call because the surrounding noise reaches the handset directly. The one that incorporates is used.

Moreover, as a telephone using bone conduction, for example, as disclosed in Patent Documents 1 and 2, a telephone including a bone conduction speaker at a position where an audio speaker is installed is known.
Japanese translation of PCT publication No. 2003-143276 Japanese translation of PCT publication No. 2003-17496

  However, in the case of a handset incorporating the noise canceling microphone, the noise cancellation level is about 10 dB, which is not so large, and it becomes difficult to make a call under noise exceeding 100 dB (such as in a highway tunnel). In addition to the noise around the site, the noise picked up by the microphone, returned to your handset through the 2-wire to 4-wire conversion circuit of the telephone, and the noise returned to your handset through the telephone line Was added, making calls more difficult.

  For this reason, it is necessary to use a microphone or circuit having excellent noise resistance. However, such a microphone or circuit is very expensive and increases the cost of the telephone, resulting in an emergency telephone or a line telephone. There is a problem that it is not suitable for a telephone for a ship.

  Also, in bone-conduction phones, the bone conduction microphone is usually in the shape of a headset or neckset, and is usually used by pressing the bone conduction microphone against the throat, etc. There is a problem that the user is not easy to use.

The present invention has been made in order to solve the above-described problem, and is a handset that makes a call close to a user's ear, and includes a casing that forms an outer shell and a mouth side of the casing among the casing. A voice transmitter with a built-in voice microphone, a voice receiver with a voice speaker built in the casing on the ear side of the casing, and a voice receiver located near the receiver and directly on the user's face A bone conduction microphone in contact therewith, and elastic support means for elastically supporting the bone conduction microphone in the vicinity of the receiving part, wherein the elastic support means elastically moves the bone conduction microphone toward the casing. And a rotation support portion that rotatably supports . As a result, when the user places the receiving part on his / her ear for a call, the bone conduction microphone supported by the elastic support means in an elastic and rotatable manner rotates along the user's face. In close contact. The same applies to a telephone using the handset.

  Since the bone conduction microphone rotates and adheres along the user's face, the call quality in a high noise environment is improved.

  In addition, since it is possible to make a call in the same manner of use as that of a normal handset, it is possible to make a call in the same manner as a call using a normal telephone, and even a general user can use it without a sense of incongruity, improving usability.

  Hereinafter, a handset and a telephone according to an embodiment of the present invention will be described with reference to the accompanying drawings. 1 is a side view showing a handset according to the present embodiment, FIG. 2 is a perspective view showing an example of a telephone equipped with the handset of FIG. 1, and FIG. 3 is a block diagram showing a switching circuit used in the handset according to the present embodiment. 4 is an enlarged view of a main part showing the handset according to the present embodiment, and FIG. 5 is a plan view showing a bone conduction microphone and a bone conduction speaker provided in the bone conduction base.

  The present invention is an invention characterized by a handset. There are various types of telephones using this handset. One example is shown in FIG. FIG. 2 shows a flat-type telephone, in which the handset is placed from above. The telephone 1 is mainly composed of a telephone main body 2 and a handset 3.

  The telephone body 2 is a device for processing a signal from the handset 3 and transmitting it to the telephone network, processing a signal received via the telephone network and sending it to the handset 3. The telephone body 2 includes a numeric keypad 5, a receiving portion 6 of the handset 3, a jack 7, and the like. The numeric keypad 5 is used to input a contact telephone number. The handset 3 is hooked on the receiving portion 6. A telephone connector 9 of the handset 3 is inserted into the jack 7 so that the telephone body 2 and the handset 3 are electrically connected.

  The handset 3 (see FIG. 1) is a device for making a call close to the user's ear. The handset 3 mainly includes a casing 10, a voice microphone 11, a transmitter 12, a receiver 13, a bone conduction microphone 14, elastic support means 15, and a connection cord 16.

  The casing 10 is formed in an outer shell having a shape similar to that of an ordinary telephone handset. The voice microphone 11 is a microphone that detects a user's voice. The transmitter 12 is a part of the casing 10 that is located on the mouth side of the user and in which the voice microphone 11 is built. The earpiece 13 is a part of the casing 10 that is located on the user's ear side and incorporates an audio speaker (not shown).

  The bone conduction microphone 14 is a device for directly contacting the user's face and converting the vibration of the vocal cords transmitted to the bone of the face into an electrical sound signal. As shown in FIGS. 1 and 3 to 5, the bone conduction microphone 14 is configured to be positioned in the vicinity of the reception unit 13 and to directly contact the user's face. As this bone conduction microphone 14, a known bone conduction pickup can be used. The bone conduction microphone 14 is integrally attached to the bone conduction base 18. Further, the bone conduction base 18 is provided with a bone conduction speaker 19 next to the bone conduction microphone 14. Thus, when the bone conduction microphone 14 of the bone conduction base 18 is brought into close contact with the user's face, the bone conduction speaker 19 is also brought into close contact with the user's face.

  Further, the handset 3 includes a noise detecting microphone 21 as noise detecting means for detecting ambient noise, and the bone from the voice microphone 11 when the noise level detected by the noise detecting microphone 21 reaches a set value. A switching circuit 22 for switching to the conduction microphone 14 is provided. The switching circuit 22 can be configured by a general circuit such as a diversity circuit. The switching circuit 22 operates when the noise level detected by the noise detection microphone 21 reaches a set value, and connects the microphone connected to the circuit in the telephone body 2 from the voice microphone 11 to the bone conduction microphone 14. Switch to. The switching circuit 22 can set a reference level for switching between the voice microphone 11 and the bone conduction microphone 14 by changing a computer program, and ambient noise is set to the set noise level. When the level is reached, switching from the voice microphone 11 to the bone conduction microphone 14 is performed. The noise detection microphone 21 and the switching circuit 22 may be incorporated in the telephone body 2 or in the switching circuit 22.

  The elastic support means 15 is means for supporting the bone conduction microphone 14 on the casing 10 side. The elastic support means 15 supports the bone conduction microphone 14 in the vicinity of the earpiece 13 so as to be elastic and rotatable. Since the bone conduction base 18 supports the bone conduction speaker 19 together with the bone conduction microphone 14, the elastic support means 15 also supports the bone conduction speaker 19 in the vicinity of the earpiece 13 so as to be elastically and rotatable. ing. Specifically, the elastic support means 15 includes a support plate 24 and a rotation support portion 25.

  The support plates 24 are plate members that are disposed on both sides of the rotation support portion 25 and support the bone conduction base 18 directly on the casing 10 side.

  The rotation support portion 25 is a member that supports the support plates 24 on both sides and supports the support plates 24 so as to be rotatable within a set angle range. The rotation support portion 25 includes an angle-regulating hinge 28 and a torsion spring 29 (see FIG. 4).

  The angle restricting hinge 28 is a hinge that restricts the angle so as not to rotate more than a set angle. Here, the two support plates 24 are regulated at about 180 degrees arranged in a substantially straight line. Specifically, the bone conduction base 18 in FIG. 1 is restricted so as to rotate only in the left direction around the rotation support portion 25 from the vertical state.

  The torsion spring 29 is a spring material for biasing the angle restricting hinge 28. The torsion spring 29 is incorporated in the angle restricting hinge 28 and urges the support plates 24 on both sides to be substantially linear via the angle restricting hinge 28. That is, when the bone conduction base 18 (the bone conduction microphone 14 and the bone conduction speaker 19) is pushed and rotated in the counterclockwise direction in FIG. 1, it tries to return to the original state so as to maintain the state of FIG. Always urging in the direction to do.

  The connection cord 16 electrically connects the telephone body 2 and the handset 3 when the telephone connector 9 is inserted into the jack 7.

[Operation]
The telephone 1 configured as described above is used as follows.

  When the telephone 1 is used for emergency contact or the like, the handset 3 is first removed from the telephone body 2. As a result, the switching circuit 22 is activated in the off-hook state, and it is determined whether or not the ambient noise level detected by the noise detection microphone 21 has reached the set value. When the noise level reaches the set value, the switching circuit 22 switches the microphone connected to the telephone body 2 from the voice microphone 11 to the bone conduction microphone 14 and switches the speaker from the voice speaker to the bone conduction speaker 19.

  As a result, the user talks in the same manner as a normal handset, but the voice emitted by the user is detected by the bone conduction microphone 14 and transmitted to the other side, and the voice from the other side is sent to the bone conduction speaker 19. Transmitted directly from the ear to the institution.

[effect]
As described above, since the bone conduction microphone 14 is rotated and brought into close contact with the user's face, it is possible to make a good call by bone conduction, and the call quality in a high noise environment is improved.

  Furthermore, since it is not necessary to use expensive parts such as a noise canceling microphone, the manufacturing cost of the telephone 1 and the handset 3 can be reduced.

  Further, since the user can make a call in the same manner of use as a normal handset without being particularly conscious, the user can make a call in the same manner as a call using a normal telephone. Since it is possible to talk without being aware of the existence of the bone conduction microphone 14, even a person who does not have knowledge of the bone conduction microphone 14 can easily use it, and the usability is improved.

[Modification]
In the embodiment, the rotation support portion 25 is configured by the angle-regulating hinge 28 and the torsion spring 29, but may be configured by using an elastic member 35 such as rubber as shown in FIG. The elastic member 35 is selected from a material that takes into account the degree of displacement of the bone conduction microphone 14 and the like. When it is necessary to greatly displace the bone conduction microphone 14 or the like, the elastic member 35 is configured using a material having a large elastic deformation amount.

  Further, when the bone conduction microphone 14 is installed in the vicinity of the earpiece 13, the elastic support means 15 for supporting the bone conduction microphone 14 may not be provided.

  Further, in the case of a small and high-performance bone conduction microphone 14, it may be embedded in the receiver 13. For this reason, the vicinity of the voice receiving section 13 includes the vicinity of the voice speaker.

  Moreover, in the said embodiment, although the one rotation support part 25 of the elastic support means 15 was provided, you may provide two or more rotation support parts 25. FIG. For example, as shown in FIG. 7, you may provide the two rotation support part 25 continuously. Accordingly, the bone conduction base 18 in FIG. 7 is rotated from the solid line state to the state of the one-dot chain line bone conduction base 18A in accordance with the shape of the user's face, and the bone conduction microphone 14 and the bone conduction speaker 19 are rotated. The abutment surface is brought into close contact with the user's face. Further, when the user strongly presses the handset 3 against the ear in this state, the handset 3 rotates to the state of the bone conduction base 18B of the two-dot chain line, and the bone conduction microphone 14 and the bone conduction speaker 19 (bone conduction base 18). Is allowed to move in a state where the angle is kept close to the user's face.

  Thereby, even if the user holds the handset 3 by hand and uses it in various modes, the bone conduction microphone 14 and the like can be always kept in close contact with the user's face, and a good call can be realized. be able to.

  In addition, although the two rotation support parts 25 were provided here, you may provide three or more continuously. A plurality of rotation support portions 25 are provided in accordance with the usage mode.

  In the embodiment, the rotation support portion 25 is configured by the angle-regulating hinge 28 and the torsion spring 29, but may be configured by a leaf spring. In the case of a leaf spring, the followability to the shape of the face is somewhat lowered, but since the structure is simple, a simple handset and telephone can be provided at low cost.

  In the above embodiment, the noise detecting microphone 21 is used as the noise detecting means for detecting ambient noise. However, the present invention is not limited to the microphone, and any device that can detect noise can be used. The switching circuit 22 has a function of switching from the voice microphone 11 to the bone conduction microphone 14 when the noise level detected by the noise detection microphone 21 reaches a set value. Can be set to For example, the audio signal of the audio microphone 11 may be decreased in conjunction with the increase in the noise level, and the audio signal of the bone conduction microphone 14 may be increased. The audio signal of the bone conduction microphone 14 may be increased without changing the audio signal. The set value may be set finely and the ratio may be changed continuously and gradually. Adjustments are made according to various conditions such as the place of use and the surrounding noise conditions.

  Moreover, in order to improve the call quality in a state without noise, parts such as a noise canceling microphone may be used. In this case, although it is disadvantageous in terms of cost, good call quality can be maintained even when the noise level is low or high.

  In the above embodiment, the bone conduction base 18 includes the bone conduction microphone 14 and the bone conduction speaker 19, but only the bone conduction microphone 14 may be provided.

It is a side view which shows the handset which concerns on this embodiment of this invention. It is a perspective view which shows an example of the telephone provided with the handset of FIG. It is a block diagram which shows the switching circuit used for the handset which concerns on this embodiment. It is a principal part enlarged view which shows the handset which concerns on this embodiment. It is a top view which shows the bone conduction microphone and bone conduction speaker with which the bone conduction base was equipped. It is a principal part enlarged view which shows a 1st modification. It is a principal part enlarged view which shows the 2nd modification.

Explanation of symbols

  1: Telephone, 2: Telephone body, 3: Handset, 5: Numeric keypad, 6: Receiving part, 7: Jack, 9: Telephone connector, 10: Casing, 11: Voice microphone, 12: Transmitting part, 13: Receiving Part: 14: bone conduction microphone, 15: elastic support means, 16: connection cord, 18: bone conduction base, 19: bone conduction speaker, 21: noise detection microphone, 22: switching circuit, 24: support plate, 25: Rotation support part, 28: Angle regulation type hinge, 29: Torsion spring, 35: Elastic member.

Claims (6)

A handset that makes a call close to the user's ear,
A casing forming an outer shell;
A transmitter part with a built-in voice microphone located on the mouth side of the user in the casing,
A receiving part with a built-in voice speaker located on the user's ear side of the casing;
A bone conduction microphone located in the vicinity of the earpiece and in direct contact with the user's face;
An elastic support means for elastically supporting the bone conduction microphone in the vicinity of the receiving part is provided, and the elastic support means is configured to elastically and rotatably support the bone conduction microphone on the casing side. A handset comprising a moving support portion . The handset of claim 1 , wherein
The handset characterized in that the turning support portion includes an angle restricting hinge that restricts an angle so as not to turn more than a set angle, and a torsion spring that biases the angle restricting hinge. . The handset according to claim 1 or 2 ,
The elastic support means includes a plurality of the rotation support portions continuously, and maintains the contact surface of the bone conduction microphone at an angle in close contact with the user's face by the plurality of rotation support portions. A handset that allows parallel movement of the bone conduction microphone. The handset according to any one of claims 1 to 3 ,
Noise detection means for detecting ambient noise, and a switching circuit for changing an output ratio between the voice signal on the voice microphone side and the voice signal on the bone conduction microphone side when the noise level detected by the noise detection means reaches a set value A handset characterized by further comprising: The handset according to any one of claims 1 to 4 ,
The handset characterized in that the elastic support means further comprises a bone conduction speaker. A telephone with a handset that makes a phone call close to the user's ear,
A telephone using the handset according to any one of claims 1 to 5 as the handset.

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