JP2005286850A - Hearing aid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hearing aid in which an operating part can be enlarged by simplifying each of members such as a power supply switch, a volume adjuster and a lock mechanism of a lid of a battery, and thus, operability can be improved. <P>SOLUTION: A housing 1A comprising a top housing 10 and a bottom housing 20 is provided on the rear end of an ear tip 50 to be attached on an ear, a battery holder 15 is provided in the inside of the housing 1A, and the opening 17 of a battery accommodating space 16 inside the battery holder 15 is opened and closed by a cover 90 freely slidably provided on the housing 1A. An annular rotating knob 100 is provided around a sound collecting hole 23 on the rear end surface of the bottom housing 20, this knob 100 is used for the switch of power supply and sound volume adjustment, and further, protrusions 100a-100c abut on and engage with the flange 94 of the cover 90, thereby locking a closed state of the cover 90 when the switch is turned ON. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a hearing aid of the type to be worn on the ear, and particularly includes a switch for performing power ON / OFF and volume adjustment, and a lock mechanism for a battery lid housed in a housing. It is related with the hearing aid which aimed at the improvement of operativity while simplifying.

  A small hearing aid of the type to be worn on the ear is provided with an earplug part to be inserted into the ear at the tip of a housing containing a microphone, a receiver, an amplifier circuit, etc. In addition, there are known a sound collecting hole for taking in sound and a volume knob for adjusting the volume, as well as a lid for storing a battery (for example, Patent Documents 1 and 2). The battery storage lid is hinged to the rear end surface of the housing or the like so as to be openable and closable. When the battery storage lid is opened, the inside of the tray-shaped battery storage lid is exposed, and the battery is dropped and stored therein. As the battery, a so-called button-type small battery is usually used.

No. 7-49920 Japanese Patent Publication No. 8-22116

  In the hearing aid having the above-described structure, the volume knob and the battery storage lid are independently arranged on the rear end surface of the housing, etc., and the power switch uses the opening / closing of the battery storage lid, or there is no power switch. There is a type in which the power is turned on with storage. In either case, the rear end face of the housing or the like has a large ratio of closing the battery compartment cover in terms of area, so the volume knob tends to be small, so it is difficult to adjust the volume or It was impossible when attached to. If the area of the rear end face is increased, such a problem can be avoided, but the feeling of wearing is sacrificed and is not realistic.

  In addition, in the type of hearing aid that does not have a power switch, the power is turned on when the battery is stored. In this case, when the hearing aid is brought close to the ear, the microphone picks up the emitted sound and causes interference, howling. Sound is likely to be generated, causing discomfort to the user.

  Therefore, the present invention simplifies each member such as the power switch, the volume adjusting unit, and the battery lid locking mechanism, and as a result, the operation part can be enlarged, and the operability is improved accordingly. The aim is to provide an illustrated hearing aid.

  The present invention is provided with a mounting portion to be mounted on the ear, a housing connected to the rear end portion of the mounting portion, a battery housed in the housing, and a housing that can be freely opened and closed. A lid for holding the battery in the housing, a lock mechanism for holding the lid in a closed state, a microphone and a sound emitting unit that use the battery as a power source, and a switch for turning on / off the power by the battery And a volume adjustment unit that adjusts the volume of sound emitted from the sound emission unit, the lock mechanism, the switch unit, and the volume adjustment unit are configured by a single movable member that can be operated from the outside. It is characterized by that.

  According to the present invention, since the movable member also serves as the lid locking mechanism, the switch unit, and the sound volume adjusting unit, simplification of these members can be achieved, so that the movable member can be set large, thereby Operability is improved. The movable member is preferably arranged at the rear end of the housing so that the movable member can be operated with the hearing aid attached to the ear. By moving the movable member itself, the power switch part is turned on / off, the volume is adjusted, and the lid part is locked / unlocked.

  The movement of the movable member may be any form such as slide or rotation. For example, in the case of rotation, the movable member is attached to the housing so as to be rotatable about a rotation axis along the front-rear direction of the housing. The form currently mentioned is mentioned. In that case, according to the rotation angle of the movable member, the lock mechanism is set to a locked state and an unlocked state. In the unlocked state, if the switch unit is set to be OFF, the lock mechanism is unlocked and the lid When the lid is closed again after opening the battery and replacing the battery, the switch is always OFF during this time, so it is possible to prevent the battery from being wasted even if it is left as it is after the battery is replaced. .

  Examples of the locking mechanism include those by the following engaging portion and engaged portion. The movable member is provided with an engaging portion. On the other hand, the lid is provided in the housing so as to be movable in the front-rear direction between the front closed position and the rear open position. An engaged portion that engages with the engaging portion of the movable member is provided only when the portion moves in the opening direction.

  The present invention includes a form in which a sound collecting hole for guiding external sound to the microphone is formed at the rear end portion of the housing, and a movable member is disposed around the sound collecting hole.

  According to the present invention, since the movable member also serves as a lid locking mechanism, a switch unit, and a volume control unit, simplification of these members can be achieved, and accordingly, the movable member can be set large. There is an effect that the operability of the movable member, that is, the lid locking mechanism, the switch unit, and the volume adjusting unit is improved.

Hereinafter, an embodiment in which the present invention is applied to a hearing aid will be described with reference to the drawings.
1 and 2 show a hearing aid 1 according to an embodiment. This hearing aid 1 is a small hearing aid of the type that is worn on the ear, and reference numeral 1A in the figure is a housing. The housing 1 </ b> A includes a combination of a top housing 10 on the left side in FIG. 1A and a bottom housing 20 disposed on the rear side of the top housing 10.

  The top housing 10 has a cylindrical portion 11 on the distal end side, and a thin cylindrical portion 12 is formed at the center of the distal end of the cylindrical portion 11. The cylindrical portion 11 has an elliptical shape with a vertically long cross section in the drawing, and a tapered portion 13 that extends toward the rear is formed at the rear end thereof, and a part of the rear end of the tapered portion 13 (upper portion in the drawing). A peripheral wall portion 14 extending from the peripheral wall of the cylindrical portion 11 and extending rearward is formed.

  A receiver 31 is fitted inside the cylindrical portion 11 of the top housing 10. The receiver 31 is a balanced armature type electromagnetic receiver, and has a sound emitting hole at a tip surface thereof. A sound path tube 40 is fixed to the thin cylindrical portion 14 at the tip of the top housing 10 by press-fitting. The distal end portion of the sound path tube 40 protrudes from the thin tube portion 14, and an ear tip 50 is attached to a portion extending from the protruding portion to the thin tube portion 14. The ear tip 50 is formed of a soft material such as silicone rubber, for example. Around the cylindrical portion 53, a first flange portion 51 from the front end side, and a second flange having a larger diameter than the first flange portion 51. A portion 52 is formed. Both of the flange portions 51 and 52 spread in an umbrella shape from the front end side toward the rear, and are very soft and elastically deformed. The ear tip 50 is mounted on the top housing 10 by press-fitting the thin cylindrical portion 14 into the cylindrical portion 53.

  The bottom housing 20 has a bottom plate portion 21 that closes the opening at the rear end of the top housing 10, and a peripheral wall portion 24 extending forward is formed on a part of the periphery (lower portion in the drawing) of the bottom plate portion 21. . The peripheral wall portion 14 of the top housing 10 and the peripheral wall portion 24 of the bottom housing 20 face each other in a state of being parallel to each other in the assembled state shown in the figure.

  The bottom plate portion 21 of the bottom housing 20 has a cylindrical shaft portion 22 protruding rearward on the rear end surface thereof, and a microphone 30 with the sound collection portion side facing rearward is fitted inside the bottom plate portion 21. ing. A sound collection hole 23 is formed at the center of the cylindrical shaft portion 22. In addition, a ring-shaped knob 100 is attached to the outer periphery of the cylindrical shaft portion 22 so as to be rotatable around its axis. The knob 100 is prevented from coming off by a ring-shaped stopper 25 fixed to the rear end surface of the cylindrical shaft portion 22. As shown in FIG. 2B, a plurality of protrusions 100a to 100c protruding in the radial direction and rearward are formed at predetermined positions on the outer periphery of the knob 100. In this case, there are three protrusions, that is, a first protrusion 100a, a second protrusion 100b, and a third protrusion 100c. These protrusions 100a to 100c are clues for facilitating the rotation of the knob 100, and the first protrusion 100a. The isosceles triangle is placed at the position where the vertex is drawn. The second protrusion 100b and the third protrusion 100c have the same size, and the first protrusion 100a is formed larger than the protrusions 100b and 100c.

  The top housing 10 and the bottom housing 20 are connected to each other in an arrangement relationship in which the peripheral wall portions 14 and 24 are opposed to each other to form the housing 10. For the connection, the positive terminal 70 made of an elastic metal is used. Is used. As shown in FIG. 1A, the positive electrode terminal 70 includes a top plate portion 71, and a front plate portion 72 and a rear plate portion 73 that respectively hang at right angles from both end edges of the top plate portion 71. It is formed in a gate shape. One side of the front plate 72 (the front side in FIG. 1A and the left side in FIG. 1B) and a portion extending inward a predetermined distance from the side edge opposite to the side edge are rectangularly extended forward. A shaped claw portion 72a is formed. In addition, rectangular claw portions 73 a extending rearward are formed on both side edges of the rear plate portion 73. That is, the positive electrode terminal 70 has a pair of left and right claws 72a (the rear side and the front side in FIG. 1A) at the front, and a pair of left and right claws 73a at the rear.

  A pair of claw portions 72a on the front side of the positive electrode terminal 70 is fitted into a shallow recess 13a formed on the inner peripheral wall of the tapered portion 13, and is fixed by adhesion. The pair of claw portions 73a on the rear side is fitted into a shallow recess 21a formed on the inner peripheral surface of the peripheral ring portion 21b formed on the peripheral edge of the bottom plate portion 21 of the bottom housing 20, and is fixed by adhesion. Yes. As described above, the positive terminal 70 is fixed to the top housing 10 and the bottom housing 20, whereby the two housings 10 and 20 are connected via the positive terminal 70. The positive terminal 70 is also fixed to both side edges of the peripheral wall portion 14 of the top housing 10. On the outside of the upper plate portion 71 of the positive terminal 70, a circuit board 32 having an IC is fixed by adhesion. That is, the circuit board 32 is disposed in a space between the upper plate portion 71 of the positive electrode terminal 70 and the peripheral wall portion 14 of the top housing 10.

  A negative electrode terminal 80 made of an elastic metal is fixed to the inner surface of the peripheral wall portion 24 of the bottom housing 20. The negative terminal 80 includes a main plate 81 facing the upper plate 71 in parallel with the upper plate 71, a rear plate 82 bent upward at a right angle from the rear end of the main plate 81, and a front end of the main plate 81. And a terminal portion 83 protruding forward. The negative terminal 80 is fixed to the bottom housing 20 by bonding the main plate portion 81 to the inner surface of the peripheral wall portion 24 and the rear plate portion 82 to the bottom plate portion 21.

  In the housing 1 </ b> A, the positive electrode terminal 70 and the negative electrode terminal 80 constitute a battery holder portion 15, and the internal space serves as a battery storage space 16. A battery 60 for supplying electric power to the IC for driving the microphone 30 and the receiver 31 through the circuit board 32 is stored in the battery storage space 16. The battery 60 is a thin cylindrical button type, and the end surface of the protruding portion 61 on one end side in the axial direction is a negative electrode, and the portion extending from the end surface on the opposite side of the protruding portion 61 to the peripheral surface is the positive electrode.

  The battery 60 is housed in the battery housing space 16 in such a posture that the protruding portion 61 faces the lower negative electrode terminal 80 side in the drawing and the bottom surface of the positive electrode faces the upper plate portion 71 side of the positive electrode terminal 70. In the storage state, the contact piece 71a formed on the upper plate portion 71 of the positive electrode terminal 70 is in elastic contact with the bottom surface of the battery 60: the positive electrode, and the end surface of the protruding portion 61: The contact piece 81a formed on the main plate portion 81 comes into elastic contact. As a result, the battery 60 is held in the battery storage space 16.

  In the housing 1A, both sides between the upper and lower peripheral wall portions 14 and 24 are open. One of the openings 17 is an insertion port for the battery 60 with respect to the battery storage space 16, and the other is an outlet for the battery 60. Is done. The battery 60 is stored in the battery storage space 16 from one opening 17 in the posture in the battery storage space 16 as described above, and is taken out from the other opening 17 in the same posture. Therefore, these openings 17 and 17 are set to dimensions and shapes through which the battery 60 can pass.

  A step portion 13 c is formed at the lower portion of the taper portion 13 in the inner surface of the top housing 10 in the figure. In addition, a stepped portion 21 c is also formed in a pair of states on both sides of the rear plate portion 82 of the positive electrode terminal 70 in a portion extending from the bottom plate portion 21 to the peripheral wall portion 24 on the inner surface of the bottom housing 20. By forming these step portions 13c and 21c, as shown in FIG. 1A, the shape of the battery storage space 16 viewed from the opening 17 (the cross-sectional shape perpendicular to the direction in which the battery 60 is taken in and out) is stored. It looks similar to the side view of the battery 60 to be used.

  A cover 90 is slidably mounted in the axial direction on the outer peripheral side of the upper and lower peripheral wall portions 14 and 24 constituting the housing 1A. The axial length of the cover 90 is substantially the same as that of the peripheral wall portions 14 and 24, and the openings 17 are closed at positions covering the entire outer peripheral surface of the peripheral wall portions 14 and 24. When the cover 90 is slid to the right side in FIG. 1A, each opening 17 is opened as shown in FIG.

  As shown in FIG. 1B, the cover 90 has a cylindrical shape with a vertically long cross-sectional ellipse in the drawing provided with side wall portions 91 on both sides and upper and lower peripheral wall portions 92 connecting the side wall portions 91. The cylindrical portion 11 of the top housing 10 is eccentric to one side as shown in FIG. 1B with respect to the cylindrical body formed by the cover 90 and the upper and lower peripheral wall portions 14 and 24. On the inner peripheral surface of the front end of the peripheral wall portion 92 on the lower side of the cover 90, a short ridge 93 extending in the circumferential direction is formed. On the other hand, the outer peripheral surface of the peripheral wall portion 24 of the bottom housing 20 extends in the axial direction. A guide groove 24a into which the ridge 93 is fitted is formed. As the ridge 93 slides along the guide groove 24a, the sliding of the cover 90 in the axial direction is guided.

  At the rear end of the guide groove 24a in the peripheral wall portion 24 of the bottom housing 20, a stopper step portion 24b with which the protrusion 93 abuts is formed. No. 90 is prevented from coming off when the opening 17 is fully open. Further, on the outer peripheral surface of the lower rear end portion of the taper portion 13 of the top housing 10, a hook portion 13d slightly protruding to the outer peripheral side and a stopper groove 13e are formed on the front side of the hook portion 13d, When the ridge 93 rides on the hook portion 13d and fits into the stopper groove 13e, the cover 90 becomes non-slidable and is held in a fully closed state in which the opening 17 is closed.

  Now, in the hearing aid 1 of the present embodiment, the external sound introduced into the microphone 30 from the sound collection hole 23 is emitted from the receiver 31, and the switch from the receiver 31 and the switch for turning on / off the operation of the hearing aid 1 are received. The volume is adjusted by the knob 100. The knob 100 also has a function of keeping the cover 90 closed during operation.

  As shown in FIGS. 1 (a) and 3 (a), the rear edge of the cover 90 is bent inward to form a flange portion 94. The flange portion 94 has an inner circular hole. A plurality of rectangular cutouts 94a to 94c are formed. In this case, the notches are a first notch 94a, a second notch 94b, and a third notch 94c formed at positions and sizes corresponding to the protrusions 100a to 100c of the knob 100. As shown in FIG. 3 (a), the knob 100 is arranged at a position where the first protrusion 100a is located at the lowest position in the drawing and the second protrusion 100b and the third protrusion 100c are aligned horizontally with each other. Is unlocked so that the cover 90 can be opened. As shown in FIG. 3, the positional relationship among the first protrusion 100a, the second protrusion 100b, and the third protrusion 100c is 135 in the clockwise and counterclockwise directions from the first protrusion 100a with the cylindrical shaft portion 22 as the center. The second protrusion 100b and the third protrusion 100c are respectively arranged at positions rotated by degrees. Further, the second protrusion 100b and the third protrusion 100c are in a positional relationship shifted by 90 °.

As shown in FIG. 3, a volume adjustment brush 101 and a power supply brush 102 are provided at predetermined positions on the back surface of the knob 100, and the contact portions 101 a and 102 a are provided on the brushes 101 and 102. Are provided respectively. On the other hand, a ring-shaped substrate 33 is fixed to a portion of the bottom plate portion 21 of the bottom housing 20 that faces the back surface of the knob 100. A volume adjustment circuit 33A for adjusting the volume and a power supply circuit 33B for turning on / off the power supply are formed on the substrate 33. The contact portions 101a and 102a of the brushes 101 and 102 are provided on the knob 100. The circuits 33A and 33B are contacted according to the rotation pattern. Each of the circuits 33A and 33B includes two circuits, and these circuits perform a predetermined action when the contact portions 101a and 102a of the brushes 101 and 102 come into contact with each other and are short-circuited. 32. In this case, the volume adjustment brush 101 provided with the contact portion 101a is the volume adjustment portion of the present invention, and the power supply brush 102 provided with the contact portion 102a is the switch portion of the present invention.
The operation of the knob 100 is as follows.

[A] Power OFF / Release of Cover 90 When the knob 100 is in the unlocked position, as shown in FIG. 3A, the protrusion 100a is notched 94a, the protrusion 100b is notched 94b, When the cover 90 is slid in the opening direction, the notches 94a to 94c pass through the projections 100a to 100c, so that they can slide and the cover 90 is fully opened. Can be. As shown in FIG. 3B, the power supply is OFF because the contact portion 102a of the power supply brush 102 is not in contact with the power supply circuit 33B.

[B] Power OFF / Cover 90 is in the locked state As shown in FIG. 4A, when the knob 100 is rotated 45 ° clockwise from the unlocked state, the protrusions 100a to 100c become flange portions of the cover 90. 94 is engaged. That is, when the flange portion 94 of the cover 90 comes into contact with the protrusions 100a to 100c, the cover 90 is in a locked state in which the cover 90 is prevented from being detached, and the battery 60 is held. Further, as shown in FIG. 4B, the power supply is OFF because the contact portion 102a of the power supply brush 102 is not in contact with the power supply circuit 33B.

[C] Power ON, Volume Low Level / Cover 90 is Locked As shown in FIG. 5 (a), when the knob 100 is rotated 45 ° clockwise from the state [b], FIG. As shown in FIG. 5, the contact portion 102a of the power supply brush 102 contacts the power supply circuit 33B, so that the power supply is turned on. Although the power is ON, the contact portion 101a of the volume adjustment brush 101 is not in contact with the volume adjustment circuit 33A, so the volume is constant at the lowest level. Further, since the flange portion 94 of the cover 90 comes into contact with and engages with the protrusions 100a to 100c, the cover 90 is still in a locked state.

[D] Power ON, Volume High Level / Cover 90 is Locked As shown in FIG. 6A, when the knob 100 is rotated 45 ° clockwise from the state of [c], FIG. As shown in FIG. 5, the contact portion 101a of the volume adjustment brush 101 contacts the volume adjustment circuit 33A, so that the volume can be increased to a predetermined level. In the range where the knob 100 rotates 45 ° from the state [c], the contact portion 102a of the power supply brush 102 is in contact with the power supply circuit 33B, and the power supply is always on. Since the flange portion 94 of the cover 90 comes into contact with each of the protrusions 100a to 100c, the cover 90 is still in a locked state.
Note that the volume adjustment circuit 33A may be configured by a resistance wire or the like, and function as a variable resistor, thereby linearly adjusting the volume.

Next, the operation of the hearing aid 1 of the above embodiment will be described.
In the hearing aid 1, when the battery 60 is stored in the battery storage space 16, power can be supplied to the IC for driving the microphone 30 and the receiver 31 via the circuit board 32. With the cover 90 closed and the power supply turned off by the knob 100, the ear tip 50 is inserted into the ear canal, the power is turned on by the knob 100, and the volume is adjusted. The sound is transmitted from the sound collection hole 23 to the microphone 30 and collected, and the sound is amplified by the circuit board 32 and emitted from the receiver 31. Then, the sound is emitted from the inside of the sound path tube 40 through the tip opening of the ear tip 50 into the outer ear. The volume of the emitted sound can be adjusted by rotating the knob 100 as described above.

Next, a procedure for replacing the stored battery 60 will be described.
The cover 90 is opened with the knob 100 as the unlocking position, and the new battery 60 to be newly stored is in the same posture as the old battery 60 stored, and the battery 60 is directed from one opening 17 to the battery storage space 16. And insert.

  At the same time as the new battery 60 is inserted, the old battery 60 is pushed out by the new battery 60, and when the new battery 60 is stored in the battery storage space 16, the old battery 60 jumps out of the other opening 17 and is taken out. When the new battery 60 is stored in this way, the cover 90 is slid forward and closed. Thus, the replacement of the battery 60 is completed.

  In such a battery replacement operation, the storage of the new battery 60 and the removal of the old battery 60 can be performed simultaneously, so that the battery replacement operation can be performed easily and smoothly. This ease of replacement is particularly useful for small electronic devices such as hearing aids. In addition, since the new battery 60 is inserted while looking at the old battery 60 stored in the battery storage space 16, the new battery 60 can be stored accurately without mistaking the polarity. In particular, in the case of the above-described embodiment, the battery housing space 16 looks similar to the battery 60 due to the step portions 13c and 21c, so that it is further prevented from mistaken polarity and the battery housing space 16 in an empty state. Even when the battery 60 is housed in the battery, it is difficult to cause erroneous insertion with incorrect polarity.

  According to the hearing aid 1 of the above-described embodiment, the knob 100 serves as the lock mechanism that holds the cover 90 closed, the power switch, and the volume control unit. Therefore, the simplification of these members is achieved, and accordingly, the knob 100 can be set to a size covering almost the entire rear end surface of the bottom housing 20. This facilitates the operability of the knob 100, that is, the lock of the cover 90, the ON / OFF of the power switch, and the volume adjustment. Further, since the knob 100 is disposed on the rear end surface of the bottom housing 20, these operations can be performed while the hearing aid 1 is attached to the ear.

  Also, the battery replacement is performed by setting the knob 100 to the power OFF position, opening the cover 90, and then closing the cover 90. Therefore, the knob 100 is always turned OFF during this period. In this case, it is possible to prevent the battery from being wasted.

  FIG. 7 shows a modification of the above embodiment. In this example, the knob 100B is rotatably attached to a position on the rear end surface of the bottom housing 20 that is eccentric with respect to the sound collection hole 23. Further, the rear end portion of the cover 90 is cylindrical, and the flange portion 94 is not formed. An arcuate shutter 110 and a semicircular arc stopper 111 along the circumferential direction are formed on the outer periphery of the knob 100B. The knob 100B rotates counterclockwise to lock / unlock the cover 90, turn on / off the power, and adjust the volume.

  FIG. 7 shows [d]: power ON, high volume level / cover 90 is in a locked state, and the cover 90 is locked by the stopper 111 engaging with the rear end surface of the cover 90. When the knob 100B is rotated clockwise from this state, the stopper 111 is released from the rear end surface of the cover 90 and unlocked, and at the same time, the sound collecting hole 23 is closed by the shutter 110. In this state, the battery 90 can be replaced by sliding the cover 90 backward, and the sound collecting hole 23 can be closed by the shutter 110 by rotating the knob 100B except when in use. It can be prevented from entering as much as possible.

BRIEF DESCRIPTION OF THE DRAWINGS It is a hearing aid which concerns on one Embodiment of this invention, Comprising: (a) is a sectional side view of the state in which the cover was closed, (b) is sectional drawing taken on the line 1B-1B of (a). It is a hearing aid concerning one embodiment of the present invention, (a) is a sectional side view in the state where a cover was opened, and (b) is a rear elevation. It is a figure which shows the effect | action of a knob, Comprising: (a) is a rear view of the hearing aid which shows the state of unlocking of a cover, (b) is the knob side with respect to the board | substrate provided with the volume control circuit and power supply circuit in the state of (a) It is a figure which shows the position of the contact part of the brush for volume adjustment of this, and the brush for power supplies. FIG. 4A is a rear view of the hearing aid in a state in which the knob is rotated 45 ° clockwise from the state of FIG. 3, and FIG. 4B is a diagram illustrating the position of the contact portion with respect to the substrate. FIG. 5A is a rear view of the hearing aid in a state where the knob is rotated 45 ° clockwise from the state of FIG. 4, and FIG. 5B is a diagram illustrating the position of the contact portion with respect to the substrate. FIG. 6A is a rear view of the hearing aid in a state where the knob is rotated 45 ° clockwise from the state of FIG. 5, and FIG. 6B is a diagram illustrating the position of the contact portion with respect to the substrate. It is a perspective view which shows the modification of the knob of one Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hearing aid 1A ... Housing 10 ... Top housing 20 ... Bottom housing 22 ... Cylindrical shaft part (rotating shaft)
23 ... Sound collection hole 30 ... Microphone 31 ... Receiver (sound emission part)
50 ... Ear tip (mounting part)
60 ... Battery 90 ... Cover (lid)
94. Flange (engaged part: lock mechanism)
100, 100B ... Knob (movable member)
100a to 100c... Projection (engagement part: lock mechanism)

Claims (6)

A wearing part to be worn on the ear;
A housing connected to the rear end of the mounting portion;
A battery housed in the housing;
A lid that is provided in the housing so as to be freely opened and closed, and holds the battery in a closed state in the housing;
A lock mechanism for holding the lid in a closed state;
A microphone and a sound emission unit powered by the battery;
A switch unit for turning on / off the power source by the battery;
In a hearing aid provided with a volume adjustment unit that adjusts the volume of sound emission from the sound emission unit,
The hearing aid, wherein the lock mechanism, the switch unit, and the volume control unit are configured by a single movable member that can be operated from the outside.   The hearing aid according to claim 1, wherein the movable member is disposed at a rear end portion of the housing.   The hearing aid according to claim 1, wherein the movable member is attached to the housing so as to be rotatable about a rotation axis along a front-rear direction of the housing.   The lock mechanism is set to a locked state and an unlocked state according to a rotation angle of the movable member, and the switch unit is set to be turned off in the unlocked state. Hearing aid described in 1. The movable member is provided with an engaging portion,
The lid portion is provided on the housing so as to be movable in the front-rear direction between a front closed position and a rear open position, and the lid portion has the switch portion by a movable member in an OFF state. Only when the lid portion moves in the opening direction, an engaged portion that engages with the engaging portion of the movable member is provided, and the locking mechanism is configured by the engaging portion and the engaged portion. The hearing aid according to 3 or 4, characterized by the above. A sound collecting hole for guiding an external sound to the microphone is formed at a rear end portion of the housing, and the movable member is disposed around the sound collecting hole. A hearing aid according to any one of the above.

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