JP2006033494A - Interphone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interphone which sufficiently collects sound to a sound collecting microphone without losing waterproofness of a casing and which is installed at a bathroom suitably. <P>SOLUTION: Voice propagated through the wall part of the casing is collected by a sound collecting microphone 5 without providing an opening for sound collection. A gap is formed by a spacer part 34 and a spacer protrusion 35 between the microphone 5 and the inner peripheral surface of the casing so that the voice Sa in the casing can reach a sound collection part 5a. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an intercom apparatus that is attached to a bathroom and includes a waterproof housing.

  The intercom device installed in the bathroom is always exposed to hot water and is exposed to a high humidity atmosphere. A sound collecting microphone is attached in the intercom device to talk to outside persons from inside the bathroom, but the interphone device is provided with a through hole in the case wall that allows sound to pass from the outside of the housing to the sound collecting microphone. Then, hot water enters through the through hole and causes a failure.

  In view of this, there is known a structure in which the through hole is closed with a waterproof sheet so that hot water does not enter the housing from the through hole (see, for example, Patent Document 1 and Patent Document 2).

  However, since the waterproof sheet does not transmit hot water but allows water vapor to pass therethrough, there is a risk that water vapor that has permeated through the waterproof sheet and entered the housing may be condensed in the housing.

Therefore, the through hole of the casing is completely sealed with a diaphragm having a thickness of 0.6 mm to 0.8 mm integrated with the casing, and this diaphragm is vibrated by sound from the outside, and on the back side of the diaphragm A sound collecting microphone that collects sound through a through-hole called a sound emitting hole is known (for example, see Patent Document 3).
Japanese Patent Laid-Open No. 11-74955 (paragraph 0025, FIG. 10) JP 2000-277934 A (paragraph 0027, FIG. 3) Japanese Patent Laid-Open No. 9-84167 (paragraphs 0017, 0019, FIGS. 1 and 2)

  The thing described in the said patent document 3 is higher waterproof than the thing described in the patent document 1 and the patent document 2. FIG. However, the diaphragm is vibrated by external sound, and the sound in the direction of the casing generated by the vibration is collected by the sound collecting microphone. Therefore, although it is about 0.6 mm to 0.8 mm, There is a problem that the sound supplied to the sound collecting microphone is greatly attenuated compared to the sound outside the housing.

  In view of the above problems, an object of the present invention is to provide an interphone device that can sufficiently collect sound in a sound collecting microphone without impairing the waterproofness of the housing.

  In order to solve the above problems, an interphone device according to the present invention is an interphone device that is installed in a bathroom and includes a sound collecting microphone that collects sound in the bathroom in a waterproof structure. The sound collecting microphone is attached with a predetermined gap between the sound collecting microphone and the inner peripheral wall surface of the housing. Sound that has passed through and propagated inside the housing is collected through this gap.

  When the sound collection opening is not formed in the housing, the sound in the bathroom propagates into the housing through every part of the wall of the housing. If the sound propagated in the housing is collected by the sound collecting microphone, the sound collecting opening may not be formed. However, if the sound collecting microphone is in close contact with the inner peripheral wall surface of the housing, the sound propagated in the housing is not easily collected by the sound collecting microphone. Therefore, a gap is secured between the inner peripheral wall surface of the casing and the sound collecting microphone, and the sound collecting microphone collects sound propagated in the casing through the gap.

  By the way, if the projection is projected from the inner peripheral surface of the casing and the sound collecting microphone is held between the projection and the inner peripheral surface of the casing, Can be reliably collected.

  The sound collecting microphone may be held in a state where the sound collecting portion is opposed to the inner peripheral surface of the casing, and a spacer portion that secures the gap may be formed at least at the base of the protrusion.

  In addition, if the thickness of the wall portion of the housing, which is opposed to the sound collecting portion of the sound collecting microphone, is made thinner than the thickness of other portions, a large amount of sound can be transmitted near the sound collecting microphone. it can.

  By the way, a speaker that reproduces an audio signal from another intercom device installed outside the bathroom is attached in the housing, and in the state where the sound is collected by the sound collecting microphone, A regeneration prohibiting means for prohibiting the operation may be provided.

  In addition to the intercom function, it has at least other functions including a remote control function. In the state where the sound accompanying the operation of the other function is reproduced by the above speaker and the sound is collected by the sound collecting microphone. It is desirable to prohibit the reproduction of sound accompanying the operation of the other function by the reproduction prohibiting means.

  As is clear from the above description, in the invention according to claim 1, since the sound collecting microphone of the intercom device attached to the bathroom is attached without providing a sound collecting opening in the housing, water vapor is introduced into the housing. Including any moisture, the intercom device reliability is improved.

  In the invention according to claim 2, since the sound collecting microphone is sandwiched and held between the protrusion and the inner peripheral surface of the housing, it is not necessary to use additional mounting parts such as screws, and the assembling property is eliminated. Will improve.

  In the invention according to claim 3, since the spacer portion that secures the gap is formed, the sound collecting portion of the sound collecting microphone is not blocked, and the sound that enters the housing is reliably collected by the sound collecting microphone. Is done.

  In the invention according to claim 4, since the thickness of the portion where the sound collecting portions of the sound collecting microphone face each other is formed thinner than the thickness of the other portions, the sound collecting that is most directly and efficiently collected by the sound collecting microphone. The volume can be increased.

  In the invention according to claim 5, the S / N ratio of the audio signal output from the sound collecting microphone is improved by preventing the sound collecting microphone from collecting the white noise generated even when the sound is not reproduced from the speaker. be able to.

  In the invention according to claim 6, the usability as the intercom function can be improved by prohibiting the reproduction of the audio signal by the remote control function while operating as the interphone function.

  Referring to FIG. 1, reference numeral 1 denotes an intercom apparatus according to the present invention. The intercom device 1 is attached to a bathroom and has a remote control function for controlling the operation of a hot water supply device outside the bathroom in addition to the interphone function.

  In the intercom device 1, an electronic component or the like is housed in a housing that includes a case body 2 and a lid 3 that is watertightly joined to the case body 2. A cosmetic cover 4 is detachably attached to the front side of the lid 3.

  When the interphone function and the remote control function are used, the button display unit 41 formed on the surface of the cover 4 is pushed and operated. Then, the waterproof switch 31 attached to the lid 3 is configured so that the one corresponding to the pressed button display unit 41 is pushed in and turned on.

  This intercom device 1 is used for talking with other interphone devices installed outside the bathroom, for example, in the kitchen or the entrance. The audio signals from these other intercom devices are reproduced by the waterproof speaker 32, and the transmission hole 42 is opened. Broadcast through the bathroom.

  With reference to FIG. 2 and FIG. 3, the sound collecting microphone 5 that collects sound in the bathroom and converts it into an electric signal is attached to the inside of the lid 3. In order to attach the sound collecting microphone 5 to the lid 3, two protrusions 33 are formed from the inner peripheral wall surface of the lid 3 in the present embodiment.

  The sound collecting microphone 5 is covered with a rubber holder 51 on the outer periphery. The holder 51 has an outer peripheral surface formed in a cylindrical shape. The holder 51 is pushed so as to be sandwiched between the two protrusions 33 and the inner surface 3 a of the lid 3, and the protrusion 33 and the inner surface generated by the elastic force of the holder 51. It is held by the frictional force generated between 3a and the holder 51 and does not fall off.

  The sound collecting microphone 5 is attached so that the sound collecting portion faces forward. A spacer portion 34 is formed at the base of the protrusion 33, and a spacer protrusion 35 is also formed in the vicinity of the inner surface 3a. Further, the front surface of the sound collecting microphone 5 abuts against the spacer projection 35 and a gap through which the sound Sa in the housing of the intercom device 1 can pass between the sound collecting microphone 5 and the inner peripheral wall surface of the lid 3. It is formed.

  Referring to FIG. 4, the sound Sb in the bathroom propagates through the cover 4 and the lid 3 and into the housing. The sound Sa propagated in the housing in this way reaches the sound collecting portion 5a through the gap formed by the spacer portion 34 and the spacer protrusion 35, and is collected by the sound collecting microphone 5 and converted into an electric signal. In the present embodiment, the wall 30 is formed by making the thickness of the portion of the wall portion of the lid 3 that the sound collecting portion 5a opposes thinner than other portions. As a result, the sound Sb directly propagating to the space 30 is increased, and the sound collected by the sound collecting microphone 5 is increased.

  However, although the thickness of the wall portion of the portion where the space 30 is formed is thinner than other portions, a thickness of 1 mm or more is secured at least, and the mechanical strength of the portion where the space 30 is provided is I tried not to drop. Therefore, even if the portion where the space 30 is formed is pushed from the surface side, it does not dent greatly with respect to the other portions.

  By the way, in the above embodiment, the sound collecting part 5a is attached so as to face forward and face the wall part of the lid 3. However, the sound collecting part 5a is disposed inside the casing by tilting the sound collecting microphone 5 by 90 degrees. There is no problem even if it is installed so as to correspond to the space.

  By the way, in the state where the call button is pressed and the sound collecting microphone 5 is collecting sound, the waterproof speaker 32 is prevented from operating even when talking from outside. Further, when the remote control function is in operation, a buzzer sound indicating various hot water filling completions and other notification sounds are reproduced by the waterproof speaker 32. However, the reproduction of these notification sounds is also prohibited when the call button is pressed and the sound collecting microphone 5 is collecting sound.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.

The figure which shows the structure of one embodiment of this invention The figure which shows the back side of a lid Enlarged view showing the vicinity of the mounting part of the sound collecting microphone Sectional view showing the sound collecting microphone in the mounted state

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intercom apparatus 2 Case main body 3 Cover body 4 Cover 5 Sound collection microphone 3a Inner surface 32 Waterproof speaker 33 Protrusion 34 Spacer part 35 Spacer protrusion 5a Sound collection part 51 Holder Sa Audio Sb Audio

Claims (6)

  In an interphone device that is installed in a bathroom and includes a sound collection microphone that collects sound in the bathroom in a waterproof structure, the housing does not have a sound collection opening and the collection The sound microphone is attached with a predetermined gap between the inner peripheral wall surface of the housing, and the sound collecting microphone transmits sound that has passed through the wall portion of the housing and propagated into the housing. An intercom device that collects sound through a gap.   The projection is provided so as to protrude from the inner peripheral surface of the casing, and the sound collecting microphone is held between the protrusion and the inner peripheral surface of the casing. 1. The intercom device according to 1.   3. The sound collecting microphone according to claim 2, wherein the sound collecting microphone is held in a state where the sound collecting portion is opposed to the inner peripheral surface of the housing, and a spacer portion is formed at least at the base of the protrusion to secure the gap. The intercom device described.   4. The intercom apparatus according to claim 3, wherein a thickness of a portion of the wall portion of the housing which is opposed to the sound collecting portion of the sound collecting microphone is thinner than that of the other portion.   A speaker that reproduces an audio signal from another intercom device installed outside the bathroom is attached inside the housing. When the audio is collected by the sound collecting microphone, the operation of the speaker is not performed. The intercom apparatus according to any one of claims 1 to 4, further comprising a prohibition unit for prohibiting reproduction. In addition to the intercom function, it has other functions including at least a remote control function, and plays back the sound that accompanies the operation of other functions through the above speaker and the above playback when the sound is collected by the sound collecting microphone. 6. The intercom apparatus according to claim 5, wherein reproduction of audio accompanying the operation of the other function is prohibited by prohibiting means.

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