JP6775147B2 - Microphone device - Google Patents

Description

The present disclosure relates to a microphone device mounted on a moving body such as a vehicle.

Conventionally, a microphone device for detecting sound inside a moving body, for example, noise entering from the outside of the moving body, or sound from an occupant, an electronic device, or the like may be attached to the inside of the moving body.

For example, as described in Patent Document 1, such a microphone device is embedded in the ceiling of a space in a vehicle which is a moving body.

Japanese Unexamined Patent Publication No. 2016-105557

By the way, in order to attach the microphone device so that a protrusion does not occur in the moving body space, it is desired to make the microphone device smaller and thinner.

Further, in order to facilitate the installation of the microphone device in the moving body space, the connector provided at the tip of the electric wire extending from the microphone device and the connector provided at the tip of the electric wire extending from the electronic device or the like are connected. To do. This hinders miniaturization as a whole including the connector.

Therefore, the present disclosure provides a microphone device that can be connected to a connector and can be miniaturized and thinned.

The microphone device according to one aspect of the present invention includes a microphone element mounted on one surface of a wiring board, an electronic component mounted only in a first region which is a region on one side of the other surface of the wiring board. A housing for accommodating the microphone element and the electronic component together with the wiring board is provided, and the housing faces a second region on the other surface of the wiring board, which is a region where the electronic component is not mounted. A protruding portion, a recessed portion provided on an outer surface at a position corresponding to the protruding portion, and a cover portion that covers the recessed portion and forms a tubular insertion portion into which a connector is inserted together with the recessed portion. ..

The microphone device of the present disclosure can be sufficiently thinned and downsized.

FIG. 1 is a perspective view showing the appearance of the microphone device. FIG. 2 is a top view showing the appearance of the microphone device. FIG. 3 is a bottom view showing the appearance of the microphone device. FIG. 4 is an exploded perspective view showing the microphone device in an exploded manner. FIG. 5 is a cross-sectional view of the microphone device virtually cut along the i-i line in FIG. FIG. 6 is a plan view showing a wiring board on which electronic components and terminal members are mounted. FIG. 7 is a cross-sectional view of the microphone device virtually cut along the ii-ii line in FIG. FIG. 8 is a perspective view showing a terminal member. FIG. 9 is a perspective view showing a connection state of the microphone device with the connector.

The microphone device according to one aspect of the present invention includes a microphone element mounted on one surface of a wiring board, an electronic component mounted only in a first region which is a region on one side of the other surface of the wiring board. A housing for accommodating the microphone element and the electronic component together with the wiring board is provided, and the housing faces a second region on the other surface of the wiring board, which is a region where the electronic component is not mounted. It is provided with a protruding portion that protrudes, a recessed portion provided on an outer surface at a position corresponding to the protruding portion, and a cover portion that covers the recessed portion and forms a tubular insertion portion into which a connector is inserted together with the recessed portion. ..

According to this, since the insertion portion formed integrally with the housing is arranged as close to the wiring board as possible, even if the structure is such that the connector is directly inserted into the microphone device, the entire microphone device is used. It is possible to reduce the thickness and size.

Therefore, the microphone device can be arranged without protruding into the space inside the moving body.

Further, a plurality of terminal members that penetrate the housing from the insertion portion and project inward of the housing are further provided, and the wiring board includes a plurality of terminal holes into which the terminal members are inserted in the second region. A slit penetrating in the thickness direction of the wiring board may be provided between the adjacent terminal holes.

According to this, it is possible to prevent a short circuit when soldering the terminal member and the wiring of the wiring board. Further, it is possible to prevent the migration phenomenon in which the metal moves on the wiring board over a long period of time and the insulation resistance value between the terminals decreases.

Further, the housing may be provided with a wall portion that projects between adjacent terminal members so as to abut the wiring board and separates the terminal members.

According to this, the part where the terminal member and the wiring of the wiring board are soldered can be separated by a wall portion, and a short circuit at the time of soldering can be prevented.

Further, the housing may be provided with a first hole for confirming the vicinity of the terminal hole of the wiring board between the cover portion and the side surface of the housing.

According to this, it is possible to confirm the state of soldering between the terminal member and the wiring of the wiring board even after the housing is closed.

Further, the housing may be provided with a second hole at a corresponding position in the first region to allow a tool to reach an electronic component mounted on the wiring board.

According to this, it is possible to adjust the sensitivity of the microphone element and change the state of the DIP switch, which is one of the electronic components, even after the housing is closed.

The housing may be provided with a built-up portion that projects outward at a position corresponding to the bent portion of the terminal member.

This solves the problem caused by the formation of the insertion portion integrally with the housing, and the housing due to the heat transmitted through the terminal member when soldering the terminal member and the wiring of the wiring board. It is possible to prevent deformation.

Further, the distance between the adjacent terminal holes may be wider than the distance between the terminal members protruding from the insertion portion.

According to this, the workability at the time of soldering can be improved, and the soldering quality can be improved. Further, even if the terminal member and the wiring of the wiring board are connected with a sufficient amount of solder, there is no short circuit and the connection can be made with a sufficient amount of solder, so that the soldering is ensured. Can be done.

(Embodiment)
Hereinafter, embodiments of the microphone device according to one aspect of the present invention will be specifically described with reference to the drawings.

It should be noted that all of the embodiments described below show a specific example of the present invention. Numerical values, shapes, materials, components, arrangement positions of components, connection forms, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Further, among the components in the following embodiments, the components not described in the independent claims indicating the highest level concept are described as arbitrary components.

In addition, the drawings are schematic drawings in which the ratios and positional relationships are appropriately adjusted and some parts are omitted in order to facilitate technical explanation.

FIG. 1 is a perspective view showing the appearance of the microphone device.

FIG. 2 is a top view showing the appearance of the microphone device.

FIG. 3 is a bottom view showing the appearance of the microphone device.

FIG. 4 is an exploded perspective view showing the microphone device in an exploded manner.

FIG. 5 is a cross-sectional view of the microphone device virtually cut along the i-i line in FIG.

The microphone device 100 shown in these figures is, for example, a device arranged between the ceiling of a vehicle, which is one of the moving bodies, and the roof liner (ceiling cloth). Further, the microphone device 100 is a device that collects only the noise in the vehicle interior, and collects the sound in the active noise control system (ANC) that supplies the canceling sound of the opposite phase to the vehicle interior and cancels the noise in the vehicle interior. It is a device that provides noise. The microphone device 100 includes a wiring board 101, a microphone element 102, an electronic component 103, a housing 104, and a terminal member 105.

FIG. 6 is a plan view showing a wiring board on which electronic components and terminal members are mounted.

As shown in the figure, the wiring board 101 is a so-called printed circuit board in which a conductor wiring pattern (not shown) is provided on the surface of an insulating plate member, and is a microphone element 102, an electronic component 103, and a terminal member 105. Etc. are mounted to form an electric circuit.

The wiring board 101 has a first region 111, which is a region on which the electronic component 103 excluding the microphone element 102 and the terminal member 105 is surface-mounted, and a second region 112, which is not surface-mounted on the electronic component 103. The second region 112 includes a portion where the terminal hole 115 to which the terminal member 105 is inserted is arranged and the protrusion 143 (described later) of the housing 104 contacts (see FIG. 5). The ratio of the shape and area of the first region 111 and the second region 112 is not particularly limited, but in the case of the present embodiment, the first region 111 and the second region 112 do not overlap and the area ratio. Is approximately 1: 1. Further, the first region 111 and the second region 112 occupy almost half of the region of the wiring board 101, respectively.

In the case of the present embodiment, the wiring board 101 is provided with a slit 113 that penetrates between the adjacent terminal holes 115 in the thickness direction (Z-axis direction in the drawing) of the wiring board 101. The slit 113 extends in the central portion between the terminal holes 115 in a direction (vertical) intersecting the arrangement direction of the terminal holes 115, and is soldered when the terminal member 105 and the wiring of the wiring board 101 are soldered. Has a function to prevent contact with. Further, by using the microphone device 100 for a long time, a migration phenomenon in which a part of the metal constituting the solder moves on the wiring board 101 is prevented.

The microphone element 102 is a component mounted on one surface of the wiring board 101 and is an electroacoustic converter that converts an acoustic signal into an electric signal. In the case of the present embodiment, the microphone element 102 is provided with a sound collecting portion 121 on the surface opposite to the surface in contact with the wiring board 101, and the sound collecting portion 121 is covered with the microphone housing 122 except for the sound collecting portion 121. The intrusion of sound from other than the unit 121 is suppressed.

The type of the microphone element 102 is not particularly limited, and a moving coil type, a ribbon type, a condenser type, a piezoelectric microphone, or the like can be adopted.

The electronic component 103 is a group of components that are electrically connected to the microphone element 102 and form an electric circuit together with the microphone element 102, and is a group of components arbitrarily selected from components such as resistors, capacitors, coils, and transistors. The terminal member 105 connected to the connector 300 (see FIG. 9) is not included in the electronic component 103. The electric circuit formed by the electronic component 103 is not particularly limited, but in the present embodiment, a filter circuit that passes only frequency components included in a predetermined range of the electric signals converted by the microphone element 102. Is forming. Further, the electronic component 103 may form an amplifier circuit or the like.

The electronic component 103 is mounted only in the first region 111, which is a region on one side of the surface opposite to the surface on which the microphone element 102 of the wiring board 101 is mounted. The electronic component 103 may be mounted on the surface on which the microphone element 102 is mounted, and there is no distinction between the first region 111 and the second region 112 on this surface.

The housing 104 is a member having a box-like rigidity for accommodating the microphone element 102 and the electronic component 103 together with the wiring board 101, and includes a protruding portion 143, a recessed portion 144, and a cover portion 145. In the case of the present embodiment, the housing 104 further includes a wall portion 146, a first hole 147, a second hole 148, an overlay portion 149, a sound collecting hole 140, and an annular protrusion 123. There is.

The protruding portion 143 is a portion of the housing 104 that protrudes from the thick portion of the housing 104 toward the second region 112, which is the region where the electronic component 103 of the wiring board 101 is not mounted. In the case of the present embodiment, the housing 104 includes a first housing 141 and a second housing 142 that form the housing 104 by joining them in a mated state, and the protruding portion 143 is the first. It is integrally provided with the housing 141.

The recessed portion 144 is a portion of the housing 104 that is integrally provided in a state of being recessed inward from the upper surface 161 of the first housing 141 at a position corresponding to the protruding portion 143. Further, the recessed portion 144 is a groove provided on the upper surface 161 of the housing 104, and one end of the recessed portion 144 in the extending direction is located within the range where the protruding portion 143 is provided and is in a closed state. The other end is open toward the side of the housing 104.

The cover portion 145 is a portion of the housing that covers the recessed portion 144 and forms a tubular insertion portion 162 into which the connector 300 is inserted together with the recessed portion 144. The cover portion 145 forms a groove arranged so as to face the groove-shaped recessed portion 144, and the extending direction of the groove formed by the cover portion 145 coincides with the extending direction of the recessed portion 144. Further, one end of the cover 145 is in a closed state, and the other end is open toward the side of the housing 104.

The cover portion 145 includes a hanging portion 163 that hangs down toward the recessed portion 144. The hanging portion 163 is provided to correspond to the shape of the connector 300 to be inserted into the insertion portion 162 formed together with the recessed portion 144.

As shown in FIG. 2, the first hole 147 is arranged between the bottom of the cover portion 145 and the side surface of the housing 104, and the terminal hole 115 of the wiring board 101 and its vicinity are viewed from the outside of the housing 104. It is a through hole for confirmation. As a result, even after the terminal member 105 is soldered to the wiring board 101, it is possible to visually recognize the soldered back side portion, and it is possible to inspect a defect in the manufacturing of the microphone device 100.

The second hole 148 is a through hole provided in the housing 104 that allows the tool to reach the electronic component 103 mounted on the wiring board 101 at the corresponding position of the first region 111. As a result, for example, a semi-fixed resistor or a DIP switch, which is one of the electronic components 103, can be operated even after the microphone device 100 is manufactured, and it is possible to adjust the electric circuit and change the mode. ..

In the case of the present embodiment, when the terminal member 105 is soldered to the wiring board 101, the electronic component 103 on the wiring board 101 is covered with the first housing 141, and the back side of the soldered terminal hole 115 is also the first housing. Covered in. Therefore, by providing the first hole 147 and the second hole 148 in the first housing 141, it is possible to provide the microphone device 100 having stable performance.

FIG. 7 is a cross-sectional view of the microphone device virtually cut along the ii-ii line in FIG.

As shown in the figure, the wall portion 146 is a portion of a housing 104 that protrudes between adjacent terminal members 105 so as to abut against the wiring board 101 and separates the terminal members 105. The wall portion 146 is a plate-shaped portion extending in a direction orthogonal to the arrangement direction of adjacent terminal members 105. In the case of the present embodiment, the wall portion 146 extends directly above the slit 113 in the same direction as the extending direction of the slit 113.

A wall portion 146 included in the first housing 141 and a slit 113 included in the wiring board 101 can separate a plurality of solder portions 200 (see FIG. 7) where the terminal member 105 is soldered, and soldering can be performed. It is possible to prevent short circuits due to work mistakes and short circuits due to whiskers of needles that naturally grow from the metal surface over time.

Further, in the case of the present embodiment, the solder portion 200 is sandwiched between the plurality of wall portions 146 to prevent the whisker from coming into contact with the electronic component 103 or the like.

As shown in FIG. 5, the sound collecting hole 140 is a through-shaped hole provided in the housing for introducing the sound existing outside the housing 104 into the microphone element 102. The sound collecting holes 140 are arranged so as to face the sound collecting portion 121 of the microphone element 102, and are arranged at a position surrounded by the annular protrusion 123.

The annular protrusion 123 is a portion that protrudes from the inner surface of the second housing 142 toward the microphone element 102. The annular protrusion 123 is in contact with the microphone housing 122 of the microphone element 102 (in the case of the present embodiment, is in contact with the sound through the packing 124), and other than the sound entering through the sound collecting hole 140 and reaching the sound collecting portion 121. It has a function to block.

FIG. 8 is a perspective view showing a terminal member.

The terminal member 105 protrudes inside the insertion portion 162 into which the connector 300 is inserted, has a connection portion 151 electrically connected to the connector 300, a penetration portion 152 penetrating the housing 104, and the inside of the housing 104. It is a member made of a conductor including an inwardly protruding portion 153 that protrudes.

In the case of the present embodiment, the terminal member 105 is bent so that the connecting portion 151 and the inwardly protruding portion 153 are substantially at right angles to the terminal member 105. Further, the linear shaft passing through the connecting portion 151 and the linear shaft passing through the inwardly projecting portion 153 are arranged at twisted positions. Further, the connecting portion 151 and the inwardly projecting portion 153 are connected via the wide portion 154, and the connecting portion 151 is connected to one end of the wide portion 154 in the width direction (X-axis direction in the drawing) and is inward. The protruding portion 153 is connected to the other end of the wide portion 154 in the width direction.

As described above, when the two terminal members 105 having a plane-symmetrical shape are arranged side by side in parallel, the distance between the inwardly protruding parts 153 can be made wider than the distance between the connection parts 151. As a result, the connecting portion 151 can be set to a spacing suitable for the connector 300, and the inward protruding portion 153 can be set to a spacing suitable for the spacing of the terminal holes 115 of the wiring board 101.

The built-up portion 149 is a portion of the housing 104 that projects outward at a position corresponding to the wide portion 154 that is a bent portion of the terminal member 105. The overlay portion 149 is thicker than the other portions of the housing 104, and holds the wide portion 154 of the terminal member 105. As a result, the terminal member 105 is firmly fixed to the housing 104. Further, it is possible to cope with the temperature load when the terminal member 105 is inserted into the terminal hole 115 and soldered.

The method of fixing the terminal member 105 to the housing 104 is not particularly limited, but in the case of the present embodiment, the first housing 141 and the two terminal members 105 are molded by insert molding. doing.

FIG. 9 is a perspective view showing a connection state of the microphone device with the connector.

As shown in the figure, by inserting the connector 300 into the insertion portion 162 of the microphone device 100, the connection portion 151 of the terminal member 105 and the electrical contact provided with the connector 300 are electrically connected. Further, the microphone device 100 is detachably attached to a bracket attached to the back side of the roof liner of the moving vehicle, and is arranged between the ceiling of the vehicle and the roof liner.

According to the microphone device 100 according to the above embodiment, the insertion portion 162 connected to the connector 300 and the housing accommodating the wiring board 101 on which the microphone element 102 and electronic components are mounted can be packaged in one package. Moreover, it is possible to reduce the thickness. Therefore, it can be arranged even in a slight gap between the ceiling of the vehicle and the roof liner.

Further, since the lead wire provided with the connector at the tip does not extend from the microphone device 100, the microphone device 100 can be firmly pressed and the connector 300 can be securely connected. Further, even if the lead wire connected to the connector 300 is unintentionally pulled, the lead wire extending from the microphone device 100 is not cut, and the microphone device 100 can be operated safely.

Although the microphone device according to the embodiment of the present invention has been described above, the present invention is not limited to this embodiment. As long as it does not deviate from the gist of the present invention, one or more of the present embodiments may be modified by those skilled in the art, or may be constructed by combining components in different embodiments. It may be included within the scope of the embodiment.

For example, the installation location of the microphone device is not limited to the ceiling portion in the vehicle interior, and may be provided in, for example, an instrument panel in order to collect the voice of the passenger in the vehicle interior.

The present disclosure can be used as a microphone device attached to a narrow part of a moving body such as a vehicle.

100 Microphone device 101 Wiring board 102 Microphone element 103 Electronic component 104 Housing 105 Terminal member 111 First area 112 Second area 113 Slit 115 Terminal hole 121 Sound collecting part 122 Microphone housing 123 Circular protrusion 124 Packing 140 Sound collecting hole 141 First One housing 142 Second housing 143 Protruding part 144 Recessed part 145 Cover part 146 Wall part 147 First hole 148 Second hole 149 Overlay part 151 Connection part 152 Penetrating part 153 Inward protruding part 154 Wide part 161 Top surface 162 Insertion Part 163 Hanging part 200 Solder part 300 Connector

Claims (7)

A microphone element mounted on one side of the wiring board,
Electronic components mounted only in the first region, which is a region on one side of the other surface of the wiring board.
A housing for accommodating the microphone element and the electronic component together with the wiring board is provided.
The housing is
A protruding portion on the other surface of the wiring board that projects toward a second region, which is a region in which the electronic component is not mounted.
A recessed portion provided on the outer surface at a position corresponding to the protruding portion,
A microphone device including a cover portion that covers the recessed portion and forms a tubular insertion portion into which a connector is inserted together with the recessed portion. A plurality of terminal members that penetrate the housing from the insertion portion and project inward of the housing are further provided.
The wiring board
A plurality of terminal holes into which the terminal member is inserted in the second region,
The microphone device according to claim 1, further comprising a slit penetrating in the thickness direction of the wiring board between adjacent terminal holes. The housing is
The microphone device according to claim 2, further comprising a wall portion that projects between adjacent terminal members so as to come into contact with the wiring board and separates the terminal members. The housing is
The microphone device according to claim 2 or 3, further comprising a first hole for confirming the vicinity of the terminal hole of the wiring board between the cover portion and the side surface of the housing. The housing is
The microphone device according to any one of claims 1 to 4, further comprising a second hole for allowing a tool to reach an electronic component mounted on the wiring board at a corresponding position in the first region. The housing is
The microphone device according to any one of claims 2 to 5, further comprising a built-up portion protruding outward at a position corresponding to a bent portion of the terminal member. The microphone according to claim 2, wherein the distance between the adjacent terminal holes is wider than the distance between the terminal members protruding in the insertion portion, or any one of claims 3 to 6 quoting claim 2. apparatus.

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