WO2013179585A1

WO2013179585A1 - Microphone device for vehicle

Info

Publication number: WO2013179585A1
Application number: PCT/JP2013/003033
Authority: WO
Inventors: 侯宏松岡; 裕杢代
Original assignee: 株式会社デンソー
Priority date: 2012-05-28
Filing date: 2013-05-13
Publication date: 2013-12-05
Also published as: JP2013244905A; JP5673603B2

Abstract

A microphone device for a vehicle, that collects audio inside a vehicle compartment from an exposed surface (60) that is exposed to inside the vehicle compartment, said microphone device comprising a conversion unit (31), a supporting body (40), an elastic member (50), and a lid (20). The conversion unit (31) converts audio into electric signals. The supporting body (40): forms a housing chamber (45) that houses the conversion unit (31) from a housing port (46) that opens towards the exposed surface (60) side; and supports the conversion unit (31) housed in the housing chamber (45). The elastic member (50) inhibits transmission of vibration that occurs between an internal circumference wall section (47) in the housing chamber (45) and the conversion unit (31), by being interposed between the internal circumference wall section (47) and the conversion unit (31). The lid (20) forms the exposed surface (60) by compressing the elastic member (50) and covering the housing port (46).

Description

Microphone device for vehicle

Cross-reference of related applications

This disclosure is based on Japanese Patent Application No. 2012-121117 filed on May 28, 2012, the contents of which are incorporated herein.

The present disclosure relates to a vehicle microphone device that is mounted on a vehicle and collects sound in the vehicle interior.

2. Description of the Related Art Conventionally, a configuration including a microphone that converts sound into an electrical signal and an operation panel that forms a housing portion that houses the microphone, such as an in-vehicle device disclosed in Patent Document 1, is known. In such an in-vehicle device, the sound in the vehicle interior is collected from the exposed surface side of the operation panel exposed in the vehicle interior. Therefore, the microphone supported by the operation panel is accommodated in the accommodating portion from the accommodating opening that opens toward the opposite side of the exposed surface so as to approach the exposed surface, and a position where the microphone hits the bottom wall portion of the accommodating portion Will be pushed in.

JP 2007-22490 A

The vibration of the vehicle is likely to be mixed in the electric signal from the microphone of the device mounted on the vehicle as in Patent Document 1 as noise. Therefore, it has been difficult to increase the sensitivity of the microphone. Therefore, the inventors of the present application have conceived a configuration in which an elastic member made of rubber or the like is interposed between the inner peripheral wall portion of the housing portion and the microphone. In this configuration, since the elastic member exhibits a function of preventing transmission of vibration from the inner peripheral wall portion to the microphone, the sensitivity of the microphone can be improved.

However, the inventors of the present application have found a problem with the above-described configuration in which an elastic member is merely interposed. The problem will be described below. In the above-described configuration, an operator who assembles the apparatus places the integrated member at a predetermined position of the housing portion after attaching the elastic member to the microphone. Therefore, in the form in which the accommodation opening of the accommodation portion opens toward the side opposite to the exposure surface as in the operation panel of Patent Document 1, if the distance from the exposure surface to the microphone is to be shortened, the accommodation portion is removed from the accommodation opening. The depth to the bottom wall becomes deeper. Therefore, the workability of assembling the integrated object at a predetermined position is deteriorated.

Therefore, the inventors of the present application have conceived a configuration in which one end of an elastic member extending in the depth direction is attached to the microphone. In this configuration, the operator can push the one end portion and the microphone to the vicinity of the bottom wall portion of the housing portion while grasping the other end portion of the elastic member. Therefore, workability can be ensured for the assembly work of the integral object.

However, an elastic member that is long in the depth direction is easily elastically deformed in that direction. For this reason, even if the operator reliably pushes the elastic member to the bottom wall portion of the accommodating portion, the close contact between the elastic member and the bottom wall portion may not be maintained. When a gap is generated between the elastic member and the bottom wall in this way, the vibration of the inner peripheral wall can be transmitted to the microphone through the gap and can be mixed into the electric signal as noise. Therefore, the gap between the operation panel and the elastic member may be a factor that hinders improvement in sensitivity of the conversion unit such as a microphone.

The present disclosure has been made in view of the above problems, and its purpose is to improve the workability of assembling the conversion unit to a support such as an operation panel and to further improve the sensitivity of the conversion unit. It is providing the vehicle microphone apparatus which can do.

A vehicle microphone device according to an aspect of the present disclosure is mounted on a vehicle and collects sound in the vehicle interior from an exposed surface side exposed in the vehicle interior of the vehicle. The vehicle microphone device includes a conversion unit, a support, an elastic member, and a lid. The conversion unit converts sound into an electrical signal. The said support body forms the storage chamber which accommodates the said conversion part from the storage port opened toward the said exposed surface side, and supports the said conversion part accommodated in the said storage chamber. The elastic member is interposed between the inner peripheral wall portion of the storage chamber and the conversion portion, thereby preventing vibration transmission between the inner peripheral wall portion and the conversion portion. The lid forms the exposed surface by closing the accommodation port while compressing the elastic member.

In the above-described vehicle microphone device, the workability of assembling the conversion unit to the support is improved, and the sensitivity of the conversion unit can be further improved.

The above and other objects, configurations, and advantages of the present disclosure will become more apparent from the following detailed description with reference to the following drawings. In the drawing
FIG. 1 is a perspective view illustrating an appearance of a navigation device according to an embodiment of the present disclosure. FIG. 2 is a front view of the navigation device. 3 is a cross-sectional view of the navigation device taken along line III-III in FIG. FIG. 4 is an enlarged view in which the periphery of the sound collection unit in FIG. 3 is enlarged. FIG. 5 is a diagram for explaining the holder mounting process. FIG. 6 is a diagram for explaining a microphone assembling step and an ornament mounting step.

Hereinafter, an embodiment of the present disclosure will be described based on the drawings. A navigation device 100 according to an embodiment of the present disclosure illustrated in FIGS. 1 and 2 includes a display screen 80 and an input surface 60 that are configured integrally with a touch panel 82. The navigation device 100 is mounted on a vehicle and guides a route to a destination determined by an operation input to the touch panel 82 and the input surface 60 using a map image or the like displayed on the display screen 80. The navigation device 100 is accommodated in a vehicle center console or the like with the display screen 80 and the input surface 60 exposed in the vehicle interior of the vehicle. In the following description, for the sake of convenience, the direction in which the display screen 80 faces is referred to as a display direction SD, and the direction opposite to the display direction is referred to as a depth direction BD. In addition, the longitudinal direction of the display screen 80 is defined as the horizontal direction HD, and the direction perpendicular to the horizontal direction along the display screen 80 is defined as the vertical direction VD.

The navigation device 100 includes a liquid crystal display 81, an ornament 20, an escutcheon 40, and the like. The liquid crystal display 81 includes a liquid crystal display 83 that forms a display screen 80 and a touch panel 82.

The liquid crystal display 83 is of a dot matrix type that realizes color display by controlling a plurality of pixels arranged on the display screen 80. The liquid crystal display 83 displays a map image or the like related to route guidance drawn by a drawing circuit or the like included in the navigation device 100 on the display screen 80. The display screen 80 has a horizontally long shape that is longer in the horizontal direction HD than in the vertical direction VD.

The touch panel 82 is formed in a plate shape with a translucent material so as to transmit light emitted from the display screen 80. The touch panel 82 is positioned in the display direction SD of the display screen 80 in a posture in which the screen surface direction is aligned with the screen 80. The position of an operating body such as a finger that is brought close to or in contact with the display screen 80 by a driver who is an operator or the like is detected by the touch panel 82.

The ornament 20 shown in FIGS. 2 and 3 is assembled to the escutcheon 40 so as to be positioned along one of the outer edges in the vertical direction VD of the display screen 80 that is close to the driver's seat. The ornament 20 includes an ornament plate 20a, an electrostatic sheet switch 28 (see FIG. 4), and the like. The ornament plate 20a is formed separately from the escutcheon 40 by a resin material or the like. The ornament plate 20 a has an ornament main body 21 and a plurality of

locking claws

23 and 24.

The ornament main body 21 shown in FIG. 2 is formed in a rectangular plate shape. An input surface 60 is formed in a longitudinal shape along the outer edge of the display screen 80 on one side of the ornament main body 21 located in the display direction SD. The input surface 60 is formed with a plurality of switch surface portions 61 to 64 that constitute so-called capacitance type switches, and a decorative plating portion 66 formed by forming a metal thin film. On the other hand, the electrostatic sheet switch 28 (see FIG. 4) is provided with a double-sided tape or the like on the other side (hereinafter referred to as “rear face 22”; see FIG. 3) of both sides of the ornament main body 21 in the depth direction BD. Is attached by. The electrostatic sheet switch 28 is formed with a plurality of sensors that detect the proximity and contact of the operating body from changes in capacitance stored between the operating body such as a finger.

As shown in FIG. 3, the locking

claws

23 and 24 are located at both end portions in the longitudinal direction on the back surface 22 of the ornament main body 21. The locking

claws

23 and 24 are erected substantially vertically from both end portions of the back surface 22 in the depth direction BD. The locking

claws

23 and 24 are provided with

convex portions

23a and 24a, respectively. Each

convex part

23a, 24a protrudes along the direction which cross | intersects a standing direction from each front-end | tip in the standing direction of the latching

claws

23, 24 to the outer peripheral side.

The escutcheon 40 shown in FIG. 2 is a member that is formed of a resin material or the like and has a quadrilateral frame shape surrounding the display screen 80. Of the four sides of the escutcheon 40, a holding portion 42 that holds the ornament 20 is formed on one side along the vertical direction VD and close to the driver's seat. Further, the escutcheon 40 is formed with an opening 41 and a plurality of locking

holes

43 and 44 shown in FIG. Since the shape of the opening 41 corresponds to the outer shape of the liquid crystal display 81 shown in FIG. 2, the escutcheon 40 can be externally fitted to the liquid crystal display 81 to hold the display 81.

As shown in FIGS. 3 and 6, the locking holes 43 and 44 are formed at both end portions of the holding portion 42 in the longitudinal direction so as to correspond to the arrangement of the locking

claws

23 and 24. Recesses that engage with the

protrusions

23 a and 24 a formed in the locking

claws

23 and 24 are formed in the locking holes 43 and 44. Thereby, each latching

hole

43 and 44 can latch each latching

claw

23 and 24 inserted in each said latching

hole

43 and 44, respectively.

In the navigation apparatus 100 shown in FIG. 2 described so far, a sound collection unit 70 is provided. The sound collecting unit 70 is located at the lower end of the input surface 60 in the vertical direction VD, and collects the sound in the vehicle compartment from the input surface 60 side. The collected sound is output to, for example, a mobile phone connected to the navigation apparatus 100 and used for a so-called hands-free call. Hereinafter, the structure of the sound collection part 70 is demonstrated based on drawing.

As shown in FIGS. 3 and 4, the sound collection unit 70 includes a microphone assembly 30, a rubber holder 50, a storage chamber 45 formed in the escutcheon 40, a lid 25 formed in the ornament 20, and the like.

4 and 5, the microphone assembly 30 has a microphone section 31, a connector 38, and a signal line 36. The microphone portion 31 includes a top surface portion 33 that faces the lid portion 25, a base surface portion 34 that faces a bottom wall portion 48 (described later) of the storage chamber 45, and a cylindrical outer periphery that connects the top surface portion 33 and the base surface portion 34. The surface portion 32 has a cylindrical appearance. The microphone unit 31 is accommodated in the accommodation chamber 45 in a posture in which the axial direction is aligned with the display direction SD. The top surface portion 33 is located away from the lid portion 25. Further, the base surface portion 34 is located away from the bottom wall portion 48.

The microphone unit 31 has a diaphragm that vibrates following the sound, and an electrode disposed along the diaphragm. The microphone unit 31 detects the electrostatic capacitance between the diaphragm and the electrode that changes due to the vibration of the diaphragm, thereby converting the sound that is the vibration Sd of the air into an electric signal.

The connector 38 is connected to, for example, a board-side connector provided on a circuit board held by the escutcheon 40. The signal line 36 can transmit an electrical signal, and connects the microphone unit 31 and the connector 38. The connector 38 and the signal line 36 are configured to output the electrical signal converted by the microphone unit 31 to the outside of the microphone assembly 30.

The rubber holder 50 is formed in a square shape by silicon rubber or the like and is attached to the microphone unit 31. The rubber holder 50 is formed with a positioning side 59, a notch 56, and a microphone accommodation hole 52. The positioning side 59 is one of the four sides of the rubber holder 50 extending along the display direction SD, and is chamfered by an arc. The notch 56 is provided at the end of the rubber holder 50 in the depth direction BD. The notch 56 forms a passage through which the signal line 36 passes with the bottom wall 48. The microphone accommodation hole 52 is formed in a cylindrical hole shape corresponding to the shape of the microphone part 31. The axial direction of the microphone housing hole 52 is along the axial direction of the rubber holder 50.

The rubber holder 50 has a holder main body 51, a front side compression part 53, and a back side compression part 54. The holder main body 51 is a part that forms the microphone accommodation hole 52, and is located on the outer peripheral side of the outer peripheral surface portion 32 of the microphone portion 31 and on the inner peripheral side of the inner peripheral wall portion 47 (described later) of the storage chamber 45. . The holder main body 51 is interposed between the inner peripheral wall portion 47 and the microphone portion 31 in an axially compressed state, thereby preventing vibration transmission between the inner peripheral wall portion 47 and the microphone portion 31.

The front side compression part 53 protrudes from the one close to the cover part 25 to the inner peripheral side among the axial end parts of the holder main body part 51. The front side compression part 53 has an annular shape and forms an opening through which the microphone part 31 can pass. According to the assembly of the rubber holder 50 to the escutcheon 40, the front side compression portion 53 protrudes from the holder main body portion 51 between the lid portion 25 and the top surface portion 33, and between the lid portion 25 and the top surface portion 33. To be compressed.

The back side compression part 54 protrudes inward from the one side spaced apart from the cover part 25 among the both ends in the axial direction of the holder main body part 51. The back side compression part 54 is exhibiting the annular | circular shape, and forms the opening which the microphone part 31 can pass through. According to the assembly of the rubber holder 50 to the escutcheon 40, the back side compression portion 54 protrudes from the holder main body portion 51 between the bottom wall portion 48 and the base surface portion 34, and the bottom wall portion 48 and the base surface portion 34. It is in a compressed state in between.

4 and 6 is formed in the end portion on the lower side in the vertical direction VD among the both end portions in the longitudinal direction of the holding portion 42. The accommodation chamber 45 has an accommodation port 46 opened toward the input surface 60 side located in the display direction SD. The storage chamber 45 forms a square columnar space defined by the bottom wall portion 48 and the four inner peripheral wall portions 47.

The bottom wall portion 48 is located in the depth direction BD of the accommodation port 46 and receives the back side compression portion 54 of the rubber holder 50. The bottom wall portion 48 is in contact with the back side compression portion 54 and is separated from the base surface portion 34 of the microphone portion 31. A passage hole 48 a is formed in the bottom wall portion 48. The passage hole 48a is provided in the bottom wall portion 48 so as to allow the connector 38 and the signal line 36 to pass therethrough.

One of the four corners formed by the inner peripheral wall 47 is a positioning corner 49 having a different shape from the other corners. The positioning corner portion 49 is located on the opening 41 side and on the upper side in the vertical direction VD among the four corner portions. The positioning corner portion 49 is formed in a partial cylindrical surface shape that complements the shape of the positioning side 59 of the rubber holder 50.

In the storage chamber 45, the microphone unit 31 and the rubber holder 50 (hereinafter referred to as “

integrated objects

31, 50”) are stored from the storage port 46. Thus, the escutcheon 40 supports the

integrated objects

31 and 50 accommodated in the accommodation chamber 45. In the storage chamber 45, the depth dimension Dd from the storage port 46 to the bottom wall portion 48 along the depth direction BD from the storage port 46 to the bottom wall portion 48 is larger than the depth dimension Ld of the rubber holder 50 along the direction BD. It has been shortened. Therefore, at least a part of the front side compression part 53 of the rubber holder 50 protrudes from the storage chamber 45 in the display direction SD.

4 is a portion that covers the accommodation opening 46 in the ornament 20. When the ornament 20 is held by the holding portion 42, the lid portion 25 closes the storage port 46 while compressing the front side compression portion 53 protruding from the storage chamber 45 in the depth direction BD. A sound collecting hole 26 that penetrates the main body 21 in the thickness direction is provided in a portion of the ornament main body 21 where the lid 25 is formed. In addition, a sound collection hole 29 that penetrates the sheet in the thickness direction is also provided in a portion where the lid portion 25 is formed in the electrostatic sheet switch 28. The sound collection holes 26 and 29 are positioned so as to overlap each other in the display direction SD of the microphone unit 31. The

sound collecting holes

26 and 29 cause the vibration Sd of air, which is sound in the vehicle interior, to reach the microphone unit 31 in the accommodation chamber 45.

Among the steps of assembling the navigation device 100 having the configuration described so far, the steps particularly related to the assembly of the sound collection unit 70 will be described below.

In the holder mounting process shown in FIG. 5, the rubber holder 50 is mounted on the microphone unit 31. The microphone part 31 is inserted into the microphone accommodation hole 52 of the rubber holder 50 from the depth direction BD. Thereby, the microphone part 31 is accommodated in the microphone accommodation hole 52, and is arrange | positioned between the front side compression part 53 and the back side compression part 54 (refer FIG. 4). Further, the direction of the signal line 36 extending from the microphone unit 31 is adjusted so as to pass through the notch 56.

In the microphone assembly process following the above holder mounting process, the microphone assembly 30 and the rubber holder 50 are attached to the escutcheon 40 from the display direction SD as shown in FIG. In the microphone assembling step, the connector 38 is first inserted into the accommodation chamber 45. Thereby, a part of the connector 38 and the signal line 36 passes through the passage hole 48 a and extends to the back side of the escutcheon 40.

Further, in the microphone assembling step, the position of the positioning side 59 of the rubber holder 50 is adjusted to the position of the positioning corner portion 49 of the storage chamber 45 by rotating the

integrated objects

31 and 50 around the axial direction. As a result, the signal line 36 extends from the microphone 31 in a direction away from the opening 41 through the notch 56 (see FIG. 5). The integrated objects 31 and 50 whose orientations with respect to the storage chamber 45 are adjusted in this way are press-fitted into the storage chamber 45 from the display direction SD. As shown in FIG. 4, the

integrated objects

31 and 50 are pushed into the accommodation chamber 45 in the depth direction BD until the back side compression portion 54 is pressed against the bottom wall portion 48.

In the ornament attachment process following the above microphone assembling process, the ornament 20 is attached to the holding part 42 from the display direction SD while the rubber holder 50 is pressed in the depth direction BD by the lid 25 as shown in FIG. The respective locking claws 23 and 24 (see FIG. 3 for the locking claws 24) are inserted into the respective locking holes 43 and 44, thereby being locked into the respective locking holes 43 and 44, respectively. As a result, the rubber holder 50 is compressed in the axial direction between the lid portion 25 and the bottom wall portion 48, as shown in FIG. In particular, the front side compression portion 53 that has protruded from the storage chamber 45 is sandwiched between the lid portion 25 and the top surface portion 33 of the microphone portion 31 in a crushed state.

According to the present embodiment described so far, the accommodation opening 46 of the accommodation chamber 45 opens toward the input surface 60, so that even if the distance from the input surface 60 to the microphone unit 31 is shortened, the accommodation chamber 45. The depth dimension Dd may be shallow. Therefore, even if the depth dimension Ld of the rubber holder 50 is short, the operator holds the rubber holder 50 and inserts the

integrated objects

31 and 50 into the storage port 46, so that the microphone unit is placed at a predetermined position in the storage chamber 45. 31 can be arranged. Therefore, the operation | work which arrange | positions the microphone part 31 in the storage chamber 45 by a microphone assembly | attachment process can become easy.

In addition, the rubber holder 50 may be difficult to elastically deform in the axial direction while reducing the elastic modulus of the material by reducing the depth dimension Ld. Therefore, the rubber holder 50 compressed by the lid portion 25 can continue to maintain close contact between the lid portion 25 and the front side compression portion 53. According to the above, the situation where the vibration of the inner peripheral wall portion 47 is transmitted to the microphone portion 31 through the gap between the lid portion 25 and the front side compression portion 53 and mixed as noise in the electric signal can be avoided.

Furthermore, since the gap between them can be eliminated by the close contact between the lid portion 25 and the front side compression portion 53, the vibration Sd of sound to be transmitted to the microphone portion 31 escapes to the holding portion 42 through this gap. This situation can be avoided. Therefore, the microphone unit 31 can efficiently pick up voice and convert it into an electric signal.

Therefore, the workability of assembling the microphone unit 31 to the holding unit 42 is improved, and the sensitivity of the microphone unit 31 can be further improved.

In addition, according to the present embodiment, since the front side compression unit 53 is sandwiched between the microphone unit 31 and the lid unit 25, the microphone unit 31 is separated from the lid unit 25. Therefore, a situation in which vibration is directly transmitted from the inner peripheral wall portion 47 to the microphone portion 31 through the lid portion 25 is unlikely to occur. Therefore, mixing of noise into the electrical signal output from the microphone unit 31 can be reliably avoided. Therefore, the sensitivity improvement of the microphone unit 31 is further certain.

Further, according to the present embodiment, the front side compression portion 53 is compressed between the lid portion 25 and the top surface portion 33, so that the gap between the lid portion 25 and the top surface portion 33 is ensured. It can disappear. Therefore, the situation in which the vibration Sd transmitted through the gap is mixed as noise in the electric signal can be reliably avoided. In addition, the microphone unit 31 can more efficiently pick up the voice in the passenger compartment. As a result, the sensitivity of the microphone unit 31 is further improved.

Furthermore, according to the present embodiment, the back side compression portion 54 is compressed between the bottom wall portion 48 and the base surface portion 34, so that the gap between the bottom wall portion 48 and the base surface portion 34 is reduced. , Surely disappear. Therefore, the situation where the vibration Sd transmitted through the gap is mixed as noise in the electric signal can be avoided. In addition, by reducing the space formed in the depth direction BD of the microphone section 31, it is also possible to avoid mixing noise into the electrical signal due to the vibration of air in the space. As a result, the sensitivity of the microphone unit 31 is further improved.

In addition, in the present embodiment, the dimensions Dd and Ld are defined so that the rubber holder 50 protrudes from the storage chamber 45. Therefore, the rubber holder 50 can make each

compression part

53 and 54 the state compressed reliably. As described above, since the close contact between the rubber holder 50 and each of the lid portion 25 and the bottom wall portion 48 is maintained, the gap that becomes the path of vibration can be surely lost. Therefore, noise can be avoided more reliably in the electrical signal output from the microphone unit 31, so that the sensitivity of the microphone unit 31 can be further improved.

In the present embodiment, the ornament 20 corresponds to a lid, the microphone 31 corresponds to a conversion unit, the escutcheon 40 corresponds to a support, the rubber holder 5 corresponds to an elastic member, and the holder main body 51 is elastic. The front side compression unit 53 corresponds to the lid side compression unit, the back side compression unit 54 corresponds to the bottom wall side compression unit, the input surface 60 corresponds to the exposed surface, and the navigation device 100 corresponds to the vehicle body. This corresponds to a microphone device for use.

(Other embodiments)
As mentioned above, although one embodiment by this indication was described, this indication is not limited to the above-mentioned embodiment and is applied to various embodiments and combinations within the range which does not deviate from the gist of this indication. be able to.

In the above embodiment, the rubber holder 50 is made of silicon rubber. However, the material of the rubber holder may be appropriately changed as long as it can exhibit a function of preventing vibration transmission. For example, various rubber materials such as ethylene propylene rubber, chloroprene rubber, urethane rubber, and styrene butadiene rubber can be used as the material for the rubber holder that is an elastic member. Further, the holder main body 51 may have a part of the side wall surface slightly spaced from the inner peripheral wall surface 47 by being fitted into the accommodation chamber 45 as shown in FIG. It may be in close contact with the inner peripheral wall portion 47.

In the above embodiment, the sound collection unit 70 is provided at the lower end of the input surface 60 in the vertical direction VD. However, the position where the sound collection unit is provided may be appropriately changed within the input surface. Furthermore, as long as the sound collection unit is exposed in the vehicle interior, the sound collection unit may be provided, for example, on the side of the driver seat side of the escutcheon.

In the above embodiment, the microphone portion 31 is formed in a columnar shape, and the rubber holder 50 is formed in a quadrangular prism shape. The shapes of the microphone part and the rubber holder may be changed as appropriate. Moreover, the shape of the front side compression part and back side compression part in a rubber holder may be changed suitably. Furthermore, as long as it is possible to ensure close contact between the rubber holder and each of the lid portion and the bottom wall portion, the front side compression portion and the back side compression portion may be omitted as appropriate.

In the above embodiment, the rubber holder 50 is in close contact with the electrostatic sheet switch 28 of the ornament 20. Thus, in the form in which the ornament 20 corresponding to the lid is configured by a plurality of members, a member having rigidity capable of compressing the rubber holder such as the ornament plate 20a may not be in direct contact with the rubber holder. Good. Of course, the ornament plate may be in direct contact with the rubber holder.

In the above-described embodiment, a compression force that compresses the rubber holder 50 in the depth direction BD is generated in the lid portion 25 by locking the locking

claws

23 and 24 in the locking holes 43 and 44. However, as a configuration for holding and fixing the ornament to the holding portion, a configuration in which the ornament is fastened by a screw or the like instead of the above-described locking claw and locking hole may be used. Even in this configuration, the compression force for compressing the rubber holder in the depth direction BD can be generated in the lid portion by the axial force of the screw.

In the above-described embodiment, an example in which the present disclosure is applied to the navigation device 100 that is mounted on a vehicle and guides a route to a destination is shown, but the scope of application of the present disclosure is not limited to the navigation device described above. For example, the present disclosure can be applied to various devices mounted on a vehicle such as a portable navigation device and an audio unit for a vehicle.

Claims

A vehicle microphone device that is mounted on a vehicle and collects sound in the vehicle interior from an exposed surface (60) side exposed in the vehicle interior of the vehicle,
A conversion unit (31) for converting sound into an electrical signal;
A conversion chamber (45) that stores the conversion unit (31) is formed from a storage port (46) that opens toward the exposed surface (60), and the conversion unit (45) is stored in the storage chamber (45). 31) supporting the support (40);
By interposing between the inner peripheral wall portion (47) of the storage chamber (45) and the conversion portion (31), vibration transmission between the inner peripheral wall portion (47) and the conversion portion (31) can be achieved. An elastic member (50) to obstruct,
A lid (20) that forms the exposed surface (60) by closing the accommodation port (46) while compressing the elastic member (50);
A vehicular microphone device comprising:
The vehicular microphone device according to claim 1, wherein the converter (31) is separated from the lid (20).
The elastic member (50)
An elastic body part (51) interposed between the inner peripheral wall part (47) and the conversion part (31);
A lid that protrudes from the elastic body (51) toward the gap between the lid (20) and the converter (31) and is compressed between the lid (20) and the converter (31). The vehicle microphone device according to claim 1, further comprising a body side compression unit (53).
The elastic member (50)
An elastic body part (51) interposed between the inner peripheral wall part (47) and the conversion part (31);
Projecting from the elastic main body (51) toward the space between the bottom wall (48) of the storage chamber and the conversion part (31), between the bottom wall (48) and the conversion part (31) The vehicle microphone device according to any one of claims 1 to 3, further comprising a bottom wall side compression portion (54) that is compressed in this manner.
The depth dimension in the depth direction from the accommodation port (46) to the bottom wall (48) in the accommodation chamber (45) is shorter than the depth dimension in the depth direction in the elastic member (50). The vehicle microphone device according to any one of claims 1 to 4, characterized in that: