JP2869505B2 - Microphone waterproof device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof device for a microphone, and is suitably applied to, for example, a waterproof hearing aid.

[0002]

2. Description of the Related Art Conventionally, in this kind of hearing aid, a waterproof function is realized by increasing the adhesion between respective members. As this type of hearing aid, there is an ear-hearing hearing aid 1 as shown in FIG. 6 (Japanese Patent Publication No. 3-39440). That is, in the hearing aid 1, a hook 3 is screwed to a distal end portion of a case 2 formed in a bow shape as a whole. The whole is held at the position behind the auricle of the wearer. By attaching a tube and earplugs (not shown) to the end of the hook 3 in this state, the hearing aid obtained from the earphone is transmitted into the ear hole of the wearer through the sound path, the tube and the earplugs in the hook 3. .

The case 2 is composed of a case body 4 and a case lid 5, and the case body 4 contains a microphone, a hearing aid processing circuit, an earphone, and the like. The case lid 5 is rotatably attached to the case main body 4 about a rotation shaft (not shown) provided at a tip end position of the case main body 4. Accordingly, in the hearing aid 1, the case cover 5 is rotated in the direction of arrow a to open the case cover 5, and adjustment and repair of each component incorporated in the case main body 4 are performed. A battery cover 7 is attached to the base of the case body 4 so as to be rotatable around a rotation shaft 6. Therefore, in the hearing aid 1, the battery cover 7
Is rotated in the direction of arrow b to open the battery cover 7 and replace the battery.

On the surface of the case lid 5, a volume knob 8 for volume control and a switch knob 9 for switching between a power supply and various functions are provided. These components penetrate through the thickness of the case lid 5 and pass through the case. It is connected to each switch component built in the main body 4. Further, on the surface of the case lid 5, an adjuster cover 10 that protects an adjusting unit that adjusts the hearing aid band and the maximum sound pressure level according to the wearer has a rotating shaft 11.
Is mounted so as to be openable and closable about the center of rotation.

Here, in the hearing aid 1, the case body 4
By providing seal packing having a shape adapted to each joint surface on the joint surface between the case cover 5 and the joint surface between the case main body 4 and the battery cover 7, it is possible to prevent intrusion of moisture from each joint surface. Has been made.

O-rings are provided between the volume knob 8 and the case lid 5 and between the switch knob 9 and the case lid 5, respectively, whereby a gap between the volume knob 8 and the case lid 5 and a switch are provided. The intrusion of moisture from the gap between the knob 9 and the case lid 5 is prevented.

A wind cover 12 for preventing wind noise from entering the microphone is provided at the tip of the case 2. The hook 3 is screwed into the case body 4 while the wind cover 12 is fitted in the case 2. It is sandwiched between the hook 3 and the case 2. That is, in the hearing aid 1, an external sound is introduced into the external sound intake of the microphone through a notch (not shown) formed near the hook 3 of the window cover 12.

Here, an appropriate waterproof member such as a filter that allows sound to pass through but does not allow water to pass through is provided in the external sound intake of the microphone. The waterproof member prevents water from entering the microphone. It has been done. In this way, in the hearing aid 1, the waterproof seal is provided between the respective members to prevent the intrusion of moisture into the case 2 beforehand.

[0009]

By the way, in the hearing aid 1, as shown in FIG. 7, a packing 14 and a waterproof member 15 are sequentially arranged at a position in front of a sound opening of a microphone 13, and the waterproof member 15 is attached to the packing 14. By pressure bonding, the waterproof film 15A that allows the sound provided in the waterproof member 15 to pass through but does not allow water to pass through prevents the penetration of moisture into the microphone 13.

Here, the pressing force for pressing the waterproof member 15 against the packing 14 is determined by the contact surface 12A formed on the inner surface of the wind cover 12 when the wind cover 12 is fitted into the case body 4. 15 frame parts 1
It is obtained by pressing 5B.

That is, in the hearing aid 1, as shown in FIG. 8, the microphone 13 (FIG. 7) is inserted into the storage space 16 inside the storage projection 19 formed by extending the case body 4 in front of the sound opening of the microphone 13 (FIG. 7). Packing 1 sequentially from the direction
4 (FIG. 7), the external sound introducing member 18 and the waterproof member 15 which are slightly smaller in outer shape than the packing 14 are stored.
At this time, the external sound introducing member 18 is
B enters the interior of B, so that the frame 15
The back surface of B contacts the periphery of packing 14 (FIG. 7).

Here, the wind cover 12 is attached to the case body 4.
The hook 3 is screwed into the hook mounting screw 17 projecting forward through a hole 12B formed in the window cover 12 while rotating the hook 3 in this state. As a result, the window cover 12 is pushed in the direction of the case body 4 by the hook 3, so that the contact surface 12 </ b> A (FIG. 7) formed on the inner surface of the window cover 12 pushes the waterproof member 15 toward the case body 4.

As a result, as shown in FIG.
The waterproof member 15 is press-fitted with a predetermined pressing force to the frame 15B of the waterproof member 15 and the storage protrusion 1.
The water which is going to enter the sound opening of the microphone 13 through the gap with the inner wall surface of the microphone 9 can be prevented by the crimping surface. Incidentally, a funnel-shaped sound path is formed in the external sound introducing member 18 so as to gradually narrow in the direction of the microphone 13, and the external sound passing through the waterproof film 15A is guided to the microphone 13 by this sound path. It has been made like that.

However, as described above, in the hearing aid 1, the waterproof member 15 is pressed against the packing 14 by the pressing force of the window cover 12.
In some cases, a sufficient crimping force required for waterproofing between the packing 14 and the waterproof member 15 may not be obtained.

For example, in the hearing aid 1, the wind cover 12 is slightly deformed, or the wind cover 12
When dust or the like enters between the case 4 and the
Cannot be fitted to a predetermined position of the case 4. In such a case, a desired pressing force is not applied to the waterproof member 15 by the window cover 12, so that a gap is formed between the packing 14 and the frame 15B of the waterproof member 15, and the microphone 13 passes through the gap. Moisture may enter.

In the hearing aid 1, the hook 3 is practically used.
Since the wind cover 12 is held by the screwing force, the pressing force between the packing 14 and the waterproof member 15 depends on the screwing state. However, the male thread of the hook mounting screw 17 (FIG. 8) and the female thread (not shown) of the hook 3 are not formed so that the hook 3 is fixed at a position facing a desired direction. As a result, when the screwing of the hook is stopped at a desired position, it is not always possible to apply an optimum pressing force to the waterproof member 15. As described above, the crimping force between the packing 14 and the waterproof member 15 is affected by various factors, and as a result, there is still an insufficient problem in preventing the intrusion of moisture into the microphone.

The present invention has been made in consideration of the above points, and has as its object to propose a waterproof device for a microphone that can surely prevent infiltration of moisture into the microphone.

[0018]

According to the present invention, a case 41 for accommodating a microphone 60 and a sound opening 60A of the microphone 60 are provided.
Extends in the forward direction of the vehicle, and has a predetermined storage space H1 inside.
, A waterproof elastic member 71 disposed in the storage space H1 and attached to the sound opening 60A of the microphone 60, and an elastic member 71 adjacent to the elastic member 71 in the storage space H1. A waterproof member 73 that is disposed and holds a waterproof film 73A that allows sound to pass therethrough and blocks moisture by a predetermined frame, and a first member that is formed in a frame shape and that is formed on the storage protrusion 70. A second engaging portion 75 that engages with the first engaging portion 76. When the second engaging portion 75 engages with the first engaging portion 76, the waterproof member 73 moves in the direction of the elastic member 71. To press the frame of the waterproof member 73 against the elastic member 71.

In the present invention, the first engagement portion 76
Is formed by a pair of fitting holes 76 formed on both side surfaces of the storage protrusion 70, and the second engagement portion 75 is formed by a pair of protrusions 75 formed on the outer surface of the crimping member 74.

Further, in the present invention, the microphone 6
0, a case 41 extending in the forward direction of the sound opening 60A of the microphone 60, a storage protrusion 70 forming a predetermined storage space H1 therein, and a case 41 disposed in the storage space H1. And the sound opening 6 of the microphone 60
A waterproof elastic member 71 attached to the outer space 0A, and disposed adjacent to the elastic member 71 in the storage space H1;
A waterproof member 73 holding a waterproof film 73A for transmitting sound and blocking moisture by a predetermined frame;
And a second engaging portion provided on the frame of the waterproof member 73 and engaged with the first engaging portion to press the frame of the waterproof member 73 against the elastic member 71. And an engaging portion.

[0021]

The frame of the waterproof member 73 is always pressed against the elastic member 71 with a constant force by the pressing member 74 regardless of the state of the other movable members. As a result, the space surrounded by the waterproof member 73 and the elastic member 71 becomes a space closed to moisture. Thus, intrusion of moisture into the microphone 60 can be prevented.

[0022]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

(1) Overall Configuration of Hearing Aid In FIGS. 1 and 2, reference numeral 30 denotes a waterproof ear-hearing hearing aid as a whole, and a box-shaped case 31 made of a synthetic resin material is provided behind a pinna. The window cover 32 and the hook 33 are integrally attached to the tip of the bow shape so as to conform to the external shape of.

As is apparent from FIG. 2, the case 31 forms an inner peripheral portion and a root portion of the case 31, and is rotatably supported at the distal end of the case body 40. , A case cover 41 forming the outer peripheral portion of the case 31, and a battery cover 42 for covering and covering a battery chamber 40 </ b> A in a cylindrical space formed at the base of the case body 40. The battery is assembled as shown in FIG. 1 by screwing it to one end of an electrode 43 protruding inside and mounting it by screwing the battery cover 42 into the case body 40.

In this case, the case body 40 and the case lid 4
A seal packing 44 made of an elastic material (e.g., rubber material) is interposed between the casing body 40 and the case body 40.
In addition, water is prevented from entering the case 31 from the gap between the case lids 41. Similarly, an O-ring 45 made of an elastic material (for example, a rubber material) is inserted between the case body 40 and the battery cover 42, so that a gap between the case body 40 and the battery cover 42 enters the case 31. It is designed to prevent water from entering.

2, the battery cover 42 has a pair of arc-shaped battery holding walls 42A and 42B protruding from the inner surface thereof.
The battery can be held inside a space surrounded by 42B (hereinafter, this space is referred to as a battery holding space). Thus, in the hearing aid 30, the battery cover 42
After the battery is fitted into the battery holding space, the battery can be loaded into the battery chamber 40A by attaching the battery cover 42 to the case body 40, and thus the battery is housed inside the case 31. Power can be supplied to the signal processing unit 50.

As can be seen from FIG. 2, the signal processing section 50 is a flexible substrate 5 on which a hearing aid processing circuit is formed.
1 is formed by integrally attaching a gain adjuster 52, a mode switching switch 53, an adjustment trimmer 54, and the like. The audio signal supplied from the microphone 60 or an induction coil (not shown) The input / output characteristics set by the operation of the switching switch 53 and the adjustment trimmer 54 are output to the earphone 62 after hearing aid processing.

In this case, in the gain adjuster 52 and the mode switching switch 53, the volume knob 63 and the switch knob provided on the outer peripheral surface of the case 31 formed by the curved surface of the case lid 41 through the thickness of the case lid 41. 64 with high waterproofness.

Thus, in the hearing aid 30, the sound pressure level of the hearing aid output from the earphone 62 can be adjusted by rotating the volume knob 63, and the switch knob 64 can be operated. Therefore, the power can be turned off or the mode can be switched.

The adjusting trimmer 54 is exposed to the outside of the case 31 through a trimmer opening (not shown) formed on the outer peripheral surface of the case 31, as is apparent from FIG. For this reason, the adjuster cover 65 is attached to the outer peripheral surface of the case 31 so as to cover the adjusting trimmer 54 so as to be openable and closable, thereby preventing the adjusting trimmer 54 from being carelessly operated. It has been made like that.

Further, the induction coil is disposed inside the flexible substrate 51 bent in a cylindrical shape, so that the space inside the case 31 can be effectively used. The microphone 60 is attached to a distal end inside the case lid 41.

A waterproof member (not shown) is attached to the tip of the case lid 41, thereby preventing moisture from entering the inside of the case 31 through the tip of the case lid 41. It is made to be able to do. The earphone 62 is disposed at the tip inside the case main body 40, so that a hearing aid sound based on the output of the hearing aid processing circuit of the signal processing unit 50 can be output to the outside of the hearing aid 30 via the hook 33. ing.

(2) Microphone Waterproof Mechanism The microphone waterproof mechanism of the hearing aid 30 is configured as shown in FIGS. 3, 4 and 5. That is, in the hearing aid 30, the case lid 41 is connected to the microphone 60.
, A storage projection 70 is provided inside which forms a storage space H1 for storing the microphone waterproofing mechanism.

A microphone 6 is provided inside the storage space H1.
A packing 71 having a cylindrical portion fitted with the sound opening 60A of the microphone 60 and having a quadrangular outer shape made of a waterproof elastic material from the direction 0, and an outer shape slightly smaller in outer shape than the packing 71. A sound introducing member 72, a waterproof member 73 having a waterproof film 73 </ b> A that allows sound to pass through but does not allow moisture to pass through, and a crimping member 74 which has a frame shape and presses the waterproofing member 73 in the direction of the packing 71 and presses the same are arranged in this order. Have been.

Here, a pair of projections (one not shown) 75 are provided on the outer surface of the crimping member 74, and the crimping members 7 are provided on both side walls of the internal space H 1 of the storage projection 70.
A pair of perforations 76 for fitting with the four projections 75 are provided. As a result, when the waterproof member 73 is pushed in the direction of the packing 71 by the crimping member 74, the crimping member 74 is stored in such a state that a predetermined crimping force is obtained between the waterproofing member 73 and the packing 71. The projection 70 is securely fixed to the internal space H1.

Further, an inclined surface 74 is provided on the upper part of the crimping member 74.
A is formed, so that when the window cover 32 is attached to the outer wall of the storage projection 70, the inner surface of the window cover 32 can be prevented from coming into contact with the crimping member 74. Accordingly, the pressing force generated between the waterproof member 73 and the packing 71 is determined only by the position of the pair of perforations 76 provided in the internal space H1 and the pressing member 74, and is affected by the window cover 32. Never.

That is, the inclined surface 3 of the wind cover 32
There is no problem if 2A and the inclined surface 74A of the crimping member 74 are merely in contact, but the inclined surface 32A is
4A, a biased force is applied to the pressing member 74, and the waterproof member 73 and the packing 7 are pressed.
1 will be impaired.

As is apparent from FIG. 5, the packing 7 is actually fitted into the sound opening 60A of the microphone 60, and is held by the projection 70A formed on the storage projection 70 at the rear position. Have been. In addition, a funnel-shaped sound path is formed in the external sound introducing member 72, and is slightly fitted into the inner surface of the packing 71 at the position of the sound opening 60A.

The frame of the waterproof member 73 passes through the external sound introducing member 72 and abuts on the periphery of the packing 71. Actually, the frame of the waterproof member 73 is pressed against the packing 71 with a predetermined force by being pressed in the direction of the packing 71 by the pressing member 74.

Thus, in the hearing aid 30, the waterproof member 73 is pressed against the packing 71 by the pressure member 74, so that the waterproof member 73 is pressed against the packing 71 with a desired force regardless of the position where the window cover 32 is fitted. Therefore, the intrusion of moisture into the microphone 60 can be reliably prevented.

That is, the above-described microphone waterproofing mechanism is completely separated from movable members such as the window cover 32 and the hook 33 and is fixed integrally with the housing projection 70, that is, the case lid 41, thereby enabling the movable microphone. The waterproof function can always be achieved regardless of the state of the member.

In the above construction, the frame of the waterproofing member 73 is pressed against the packing 71 by the pressing member 74. As a result, no gap is formed between the frame of the waterproof member 73 and the packing 71, so that the ingress of moisture from the side to the front of the sound opening 60 </ b> A of the microphone 60 is prevented. The entry of moisture from the front of the sound opening 60A of the microphone 60 is prevented by the waterproof film 73A of the waterproof member 73. In this way, a space closed to moisture is formed in the front direction of the sound opening portion 60A of the microphone 60, and the penetration of moisture into the microphone 60 is prevented.

According to the above configuration, by providing the crimping member 74 for crimping the waterproof member 73 against the packing 71, the hearing aid 30 capable of reliably preventing moisture from entering the microphone 60 can be realized. it can.

In the above embodiment, the pressure member 7
4, the case where the waterproofing member 73 is pressed against the packing 71 by the pressing member 74 has been described. However, the present invention is not limited to this. For example, a projection is provided on the frame of the waterproofing member 73 and the projection is The housing projection 7 is such that the waterproofing member 73 and the packing 71 are press-fitted with a predetermined force when fitted.
If the perforation is made at the position 0, the crimping member 74
Can be omitted.

In the above-described embodiment, the storage protrusion 7
0, the perforation 76 is provided, and the projection 75 of the crimping member 74 is fitted into the perforation 76 to fix the crimping member 74 to the storage projection 70. However, the present invention is not limited to this. Alternatively, a recess may be provided in place of the perforation 76 and the protrusion 75 of the crimping member 74 may be fitted into the recess to fix the crimping member 74 to the storage protrusion 70.

Further, in the above-described embodiment, the case where the storage projection 70 is provided with the perforation 76 and the crimping member 74 is provided with the projection 75 which fits into the perforation 76, but the present invention is not limited to this. Instead, for example, the storage protrusion 70 is formed in a cylindrical shape, a female thread portion is formed on the inner wall surface of the cylindrical shape, and the frame portions of the waterproof member 73 and the crimping member 74 are formed in a circumferential shape. By forming the screw portion on the outer surface, the same effect as in the above-described embodiment can be obtained even when the crimping member 74 is screwed into the storage protrusion 70. Similarly, a female thread is formed on the inner wall surface of the cylindrically formed storage protrusion 70, and a screw is formed on the outer surface of the circumferentially formed waterproof member 73. If it is screwed in, the crimping member can be omitted.

Further, in the above-described embodiment, the case where the present invention is applied to the ear-hearing hearing aid 30 has been described. The present invention can be applied to various hearing aids and other audio devices using microphones, such as ear-mounted radios, telephones, transceivers, and video cameras.

[0048]

As described above, according to the present invention, a case for accommodating a microphone, and a storage projection formed by extending the case in the forward direction of the sound opening of the microphone to form a predetermined storage space therein. A waterproof elastic member provided in the storage space and attached to the sound opening of the microphone, and disposed adjacent to the elastic member in the storage space to transmit sound and block moisture. A waterproof member having a waterproof film held by a predetermined frame, and a second engaging portion that is formed in a frame shape and that engages with a first engaging portion formed on the storage protrusion. A pressing member for pressing the frame of the waterproof member to the elastic member by pressing the waterproof member toward the elastic member when the second engaging portion is engaged with the first engaging portion. As a result, the penetration of moisture into the microphone can be reliably prevented. A waterproof device can be realized for Ikurohon.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a hearing aid according to an embodiment.

FIG. 2 is an exploded perspective view thereof.

FIG. 3 is a partially cutaway cross-sectional view for explaining a microphone waterproofing mechanism.

FIG. 4 is an exploded perspective view for explaining a microphone waterproofing mechanism.

FIG. 5 is a sectional view for explaining a microphone waterproofing mechanism;

FIG. 6 is a perspective view showing a conventional ear-hearing hearing aid.

FIG. 7 is a partially cutaway cross-sectional view for explaining a conventional microphone waterproofing mechanism.

FIG. 8 is an exploded perspective view for explaining a conventional microphone waterproofing mechanism.

FIG. 9 is a cross-sectional view for explaining a conventional microphone waterproofing mechanism.

[Explanation of symbols]

1, 30, hearing aid, 5, 41, case lid, 12,
32: wind cover, 13, 60 ... microphone, 14, 71 ... packing, 15, 73 ... waterproof member, 15A, 73A ... waterproof film, 19, 70 ... storage protrusion, 74 ... crimp member , 75 ... Projection, 76 ... Perforation.

Claims (3)

(57) [Claims] 1. A case for accommodating a microphone, a case extending from the case in a forward direction of a sound opening of the microphone, and a storage protrusion forming a predetermined storage space therein; and a case disposed in the storage space. A waterproof elastic member attached to the sound opening of the microphone; and a waterproof film that is disposed adjacent to the elastic member in the storage space and that allows sound to pass therethrough and blocks moisture. A waterproof member held by the frame body, and a second engaging portion that is formed in a frame shape and engages with a first engaging portion formed on the housing protrusion. 2
A pressing member for pressing the frame of the waterproof member to the elastic member by pressing the waterproof member in the direction of the elastic member when the engaging portion is engaged with the first engaging portion. A waterproof device for a microphone, comprising: 2. The first engaging portion includes a pair of fitting holes formed on both side surfaces of the storage protrusion, and the second engaging portion includes a pair of engaging holes formed on an outer surface of the crimping member. The waterproof device for a microphone according to claim 1, wherein the waterproof device comprises a protrusion. 3. A case for accommodating a microphone, a storage projection formed by extending the case in a forward direction of a sound opening of the microphone, and forming a predetermined storage space therein, and disposed in the storage space. A waterproof elastic member attached to the sound opening of the microphone; and a waterproof film that is disposed adjacent to the elastic member in the storage space and that allows sound to pass therethrough and blocks moisture. A waterproof member held by the frame member; a first engaging portion provided on the housing protrusion; and a waterproof member provided on the frame member of the waterproof member to engage with the first engaging portion. And a second engaging portion for pressing the frame of the waterproof member against the elastic member.