JP2000324213A - Portable communication unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable communication unit having two microphones by which a user can make a telephone call through either of the microphones. SOLUTION: This portable communication unit is provided with a unit main body 9, a 1st microphone 5 provided thereto, a flip cover 6 that covers a front face of the unit main body, and a 2nd microphone 7 that is provided at the internal face of the flip cover. A user can make a call by using the 1st microphone 5 at the unit main body 9, when the flip cover is closed and by using the 2nd microphone at the flip cover, when the flip cover is open.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable mobile terminal device, and more particularly to a portable communication device having a function of enabling communication by telephone call.

2. Description of the Related Art There are various types of portable communication terminal devices, including those including various types of information communication and telephone calls, and any of them is capable of wireless communication with a partner at any time, from anywhere. Therefore, it has been used frequently.

[0003] The present invention relates to such a portable communication device, and more particularly to an improvement in the call function of a device having a telephone function.

In portable communication devices having a telephone function, miniaturization and weight reduction by multi-functionalization and high density have been drastically promoted, and it is clear that further development will be made in the future. It is.

In such a portable communication device, operation buttons and a display panel for displaying information are provided at the center of the surface of the portable communication device, and a microphone as a transmitter is provided at one end of the both ends and a receiver is provided at the other end. A speaker is provided therein to transmit and receive voice.

[0006] An information signal processing circuit, a circuit for wireless communication, and a secondary battery for power supply are detachably incorporated therein, and an antenna for wireless communication is provided so as to be expandable and contractable to the outside.

For the purpose of protecting the operation button portion and improving the appearance of the appearance, etc., an opening / closing cover mainly called the flip or flipper, which mainly covers the operation button portion, has been proposed. Some are provided with the end of the apparatus body on the microphone side as the center of rotation.

[0008]

2. Description of the Related Art Since a portable communication device is small in size, a microphone and a speaker are provided at an end of a device main body which is separated from the microphone as much as possible to provide a good communication function. The sound collection effect is enhanced by using the reflection of the opening and closing cover surface. Alternatively, since the opening / closing cover covers the mouth during a call, there is an operation and effect that the user can talk with confidence without worrying about the eyes.

[0009] In addition, in order to further improve the calling function, a microphone is not provided in the apparatus main body, but is provided on the inner surface side of the opening / closing cover, so that it is possible to talk with the opening / closing cover being opened. Since the speaker is located farther away from the speaker than provided at the end of the apparatus main body, the microphone can be brought closer to the mouth, and the communication quality can be improved.

[0010]

In the above-mentioned conventional portable communication device, providing a microphone on the opening / closing cover requires that the opening / closing cover must be opened when talking, and the call is immediately taken up. Is inconvenient in an emergency.

Further, since the connection cord for connecting the microphone and the circuit of the apparatus body is directly soldered to the board circuit, it is possible to deal with problems such as breakage of the microphone and disconnection due to bending and bending caused by opening and closing of the connection cord. In some cases, replacement of the entire apparatus or replacement of a circuit board including a microphone is required, which results in poor cost and replacement workability, which may cause inconvenience to both the maintenance person and the user.

In view of the above, it is conceivable to make the connection cord of the microphone detachable by a connector. However, it is necessary to secure a space for mounting the connector, which hinders miniaturization. When the connector is damaged by an impact or the like, it cannot be repaired immediately, so that the circuit board including the microphone also needs to be replaced.

[0013] In addition, the connecting cord is made to have sufficient flexibility and elasticity through the rotating portion of the opening and closing cover. However, depending on long-term use, the connecting cord may be broken due to bending at the time of opening and closing. There can be inconvenience.

SUMMARY OF THE INVENTION In view of the above problems, the present invention makes it possible to make a call with the open / close cover closed or open, and to improve the connection structure between the microphone on the open / close cover side and the circuit on the apparatus body side. SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable communication device that has been provided.

[0015]

Means for Solving the Problems The first means of the present invention for solving the above-mentioned problems includes a device main body, a first microphone provided in the device main body, An opening / closing cover for covering the front surface, a second microphone provided on the inner surface side of the opening / closing cover, and a connection between the first microphone and the second microphone at the center of rotation of the opening / closing cover as the opening / closing cover is opened / closed. A portable communication device having a switch means for switching.

According to the first means, the microphone is provided on each of the apparatus main body and the opening / closing cover, so that the first microphone on the main body side is provided when the opening / closing cover is closed and the microphone is provided when the opening / closing cover is opened. By automatically switching the two microphones by the switch means in response to opening and closing operations, an effective telephone call can be made, and a suitable mode can be formed.

According to a second aspect of the present invention, there is provided an apparatus main body, a first microphone provided in the apparatus main body,
An opening / closing cover for covering the front surface of the apparatus main body, and a second microphone provided on the inner surface side of the opening / closing cover.
A connecting pattern of a conductor connected to the second microphone is provided on one side of the rotating portion of the opening / closing cover, and an elastic contact connected to a circuit in the apparatus body to a shaft body of the apparatus body for supporting and rotating the opening / closing cover. A portable communication device in which a connection pattern and an elastic contact piece are contact-connected at an open position of the open / close cover, and the connection pattern and the elastic contact piece are separated at a closed position of the open / close cover. Device.

According to the second means, a microphone is provided on each of the apparatus main body and the opening / closing cover, and when the opening / closing cover is closed, the connection pattern provided on the rotating portion of the opening / closing cover is connected to the shaft on the apparatus main body side. Since the elastic contact piece of the body is at the separated position, the first microphone on the device body side
When the opening / closing cover is opened, contact connection is made, so that the microphone is automatically switched to the second microphone, and an effective telephone call is possible.

A third means of the present invention comprises an apparatus main body, a first microphone provided in the apparatus main body,
An opening / closing cover for covering the front surface of the apparatus main body, and a second microphone provided on the inner surface side of the opening / closing cover.
A connecting pattern of a conductor connected to the second microphone is provided on one side of the rotating portion of the opening / closing cover, and a circuit in the apparatus body is connected to a shaft body on the apparatus body side for supporting and rotating the opening / closing cover. The portable communication device is provided with an elastic contact piece and an elastic contact piece inside the shaft body, which is elastically contacted with a circuit pattern of a circuit board in the device main body.

According to the third means, microphones are provided on both the apparatus main body and the open / close cover, and it is possible to make a call using either the first or second microphone according to the open / close state of the open / close cover. As means for making a circuit connection between the second microphone and a circuit board in the apparatus main body, the circuit pattern of the circuit board is connected by an elastic contact with an elastic contact piece inside the shaft body, so that soldering or the like is performed. This makes it possible to easily connect or disconnect the circuit during this period, thereby improving the workability during manufacturing and assembly or maintenance and inspection.

According to a fourth aspect of the present invention, a terminal of the second microphone in a state where the open / close cover is opened and the second microphone provided on the inner surface of the open / close cover is connected to a circuit in the apparatus body. The DC voltage is monitored. When there is a significant voltage difference between the DC voltage and the power supply voltage, the output of the second microphone is selected. When there is no significant voltage difference between the DC voltage and the power supply voltage, the output of the second microphone is determined. The first provided
The portable communication device is configured to select an output of a microphone of the portable communication device.

According to the fourth means, when the second microphone is not connected to the circuit in the apparatus main body even when the opening / closing cover is closed, no DC bias current is supplied to the normally used condenser microphone. Therefore, the DC voltage becomes equal to the power supply voltage, and when the second microphone is normally connected to the circuit in the apparatus main body with the open / close cover closed, the DC bias is applied to the normally used condenser microphone. Current is supplied,
It can be detected that the DC voltage has a significant voltage difference with respect to the power supply voltage.

Therefore, when there is a significant voltage difference between the DC voltage and the power supply voltage, the output of the second microphone is selected, and when there is no significant voltage difference between the DC voltage and the power supply voltage, the output of the second microphone is selected. It is possible to select the output of the first microphone to be disconnected, and disconnection occurs between the second microphone and the circuit in the main body of the device for some reason, or in the worst case, the open / close cover itself is removed or lost. However, the communication function of the portable communication device can be ensured by the first microphone.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a portable communication apparatus according to an embodiment of the present invention; It is to be noted that the same parts are denoted by the same reference numerals for the sake of convenience for easy understanding throughout the drawings.

Further, components other than the main parts according to the present invention, for example, electronic components and the like are not shown in the figure because they are complicated.

FIG. 1 is an external view of a portable communication device according to the present invention. FIG. 1 (a) is a front view and FIG. 1 (b) is a side view.
In the following description, for convenience, the left side is the front or front, the right side is the back, and the front is the upper or upper side in FIG.
The near side is referred to as the lower side or the lower side. This communication device is a portable telephone.

The portable communication device 1 has a receiving section 2 having a built-in speaker, a display section 3 for displaying various information, and a push button for performing operations such as input using a push button switch in order from the top in FIG. A transmitting unit incorporating a first microphone 5 at a lower end, an opening / closing cover 6 rotatably openable and closable by legs supported on both sides thereof, and an inner end of the opening / closing cover 6 in an open state The second microphone 7 provided inside the direction and the tip of the telescopic antenna 8 at the upper end are shown.

In the figure, the upper side of the opening / closing cover 6 is the apparatus main body 9, and the opening / closing cover 6 is provided on the push button section 4
Is closed as shown by a two-dot chain line so as to cover the front surface of the second microphone 7, and when closed, the second microphone 7 is in a shielded state.

As shown in FIG. 2B, the push button portion 4 is formed one step lower, and when the opening / closing cover 6 is closed, the entire front side becomes a flat curved surface in a side view. The locking projection 11 protruding from the step of the push button part 4 is temporarily retracted into the apparatus main body 9 by elasticity due to the contact of the end face of the opening / closing cover 6, and is closed by the recess 12 at the tip of the opening / closing cover 6. It protrudes and maintains the closed state.

In order to open the closed cover 6, the locking projection 11 is retracted into the apparatus main body 9 by pushing a button 13 on a side surface, not shown, which will be described later. It is configured to be opened to the position indicated by the solid line. Further, it is rotatable to the open position shown by the two-dot chain line, but even if this position is set, it is returned to the solid line position by the elastic restoring force.

As shown in FIG. 2B, the apparatus main body 9 has a front case 15 made of synthetic resin and a rear case 16.
And are integrally combined, and the battery 17 is detachably attached to the lower side on the back side.

In the apparatus main body 9, various circuits necessary for communication are incorporated as circuit boards made of printed wiring boards and electronic components.

FIG. 2A is a front view of a main part with the opening / closing cover 6 in an open position, and FIG. 2B is a side sectional view of the main part with the opening / closing cover 6 closed, and FIG. Is A- in FIG.
A cross-sectional view.

According to FIG. 5A, the portion of the apparatus main body 9 in which the first microphone 5 is accommodated is the push button section 4.
The opening and closing cover support portion 21 is formed so as to extend in the left and right direction so as to protrude, and is rotatably supported on the left and right end faces so that the two leg portions 22 of the opening and closing cover 6 are fitted to each other. .

The opening / closing cover 6 is a combination of a front side cover 23, which is an outer side in a closed state, and an inner side inner side cover 24, as shown in the sectional side view of FIG. A flat space portion 25 is formed in the middle portion. The front-side cover 23 and the inner-side cover 24 are made of a synthetic resin molded product that is hard but relatively flexible and has elasticity and strength.

Reference numeral 27 denotes a circuit board formed of a multilayer printed wiring board, and electronic components and the like constituting the circuit are omitted for simplicity. The first microphone 5 is attached and connected to the circuit board 27.

A second microphone 7 is attached to a space 25 inside the opening / closing cover 6 as shown by a dotted line in FIG. It is open. For connection between the second microphone 7 and the circuit board 27, a connection pattern plate 29 connected to the second microphone 7 and extending extends through the inside of the space portion 25 as shown by a dotted line.
They are arranged in two directions.

The end of the connection pattern plate 29 is positioned at the rotation center of the opening and closing of the cover 6, and the opening and closing cover 6 is supported and rotated at the rotation center on the apparatus body 9 side. Shaft 31 is provided.

A shaft portion 32 and an elastic contact piece 33 are provided outside the device main body 9 of the rotating shaft 31.
An elastic contact piece 34 is provided inside. Although the detailed configuration of these will be described later, the connection pattern plate 2
The end portion 9 and the resilient contact piece 33 are connected to each other in a circuit at the open position of the opening / closing cover 6, and are separated from each other at the closed position to be in a disconnected state.

FIG. 3 shows the front cover 2 of the opening / closing cover 6.
3 is shown, and FIG. 4A shows BB of FIG.
FIG. 3B shows a cross-sectional view, and FIG. 3B shows a CC cross-sectional view of FIG.

An arc wall 41 and a rib 42 for positioning the second microphone 7 and a plurality of pairs of projections 43 for arranging and positioning the connection pattern plate 29 are provided on the inner surface of the front cover 23 and below the figure. Vent holes 44 in the part,
Are formed.

The leg 22 is formed on both sides on the upper side of the figure, and both side walls 45 and the lower end wall 46 are formed so as to surround the inner surface from three sides. A positioning step 47 extends on the inner surface along the side wall 45 in the vertical direction in the figure. No wall surface is formed between the two legs 22.

The left and right sides of the inner surface of the end wall 46 are shown in FIG.
As shown in FIG. 5A, a recess 48 is formed, and the recess 12 is formed in the center of the outer surface as shown in FIG.
Are formed.

As shown in FIG. 4, a rectangular concave hole 49 inclined at a predetermined angle and a cutout portion 51 are formed on the inner surface of the left leg 22 shown in FIG. A circular concave hole 52 is formed in the inner surface of the leg 22 on the right side in the drawing.
, A guide groove 53 reaching the concave hole 52 and a notched portion 54 described later.

FIG. 5 (a) shows the front side of the inner cover 24 of the opening / closing cover 6, FIG. 5 (b) is a sectional view taken along line DD, FIG. 5 (c) is a sectional view taken along line EE. FIG. 6 shows the inner side.

The inner cover 24 has a thin plate shape, and has protrusions 55 at both ends on the right side in the figure, low protrusions 56 extending between the protrusions 55, and low protrusions 57 extending in the left and right directions at the upper and lower ends in the figure.
, Three surfaces are enclosed. 2 along the left edge
A protrusion 58 is formed to project from the location.

Although not shown in FIG. 5, according to FIG. 6, elongated convex portions 59 are formed at important points in the plane portion, a shallow concave surface 61 for positioning the second microphone 7, and a communication hole 28 in the center thereof. Is provided.

FIG. 7 is a view showing a state in which the front cover 23 and the inner cover 24 are combined and connected, as viewed from the inner surface side. FIG. An F section view and a GG section view are shown in FIG.

The side walls 45 and the end wall 4 of the front cover 23
The inner surface side cover 24 is fitted as shown in the figure, and the protrusion 58 at the tip is inserted into the recess 48.
And then fit the whole.

The protrusions 55 on both sides of the inner cover 24 are
Since the protrusion 55 is blocked by the inner surface side, it can be inserted by bending the protrusion 55 in the direction of the opposing inner surface and pushing it in while elastically deforming it.

The projection 55 reaches the position of the notch portions 51, 54 of the front cover 23, and fits into the notch portions 51, 54 by elastic recovery. This state is shown in FIG. 7 and FIG.

In this state, the projections 55 and 58 do not come off and come off due to the fitting of the projections 55 and 58.
At the same time, the rib 42, the step 47, the ridge 56, the projection 5
9 and the like come into contact with each other between the front cover 23 and the inner cover 24, and the mutual position is reliably fixed by these actions, so that the space 25 is secured.

FIG. 9 is an external view of the second microphone assembly. The structure of this assembly includes the second microphone 7 and the connection pattern plate 29. The second microphone 7 is as shown in an enlarged view of a side cross section of FIG. 10 and includes a flat microphone body 65,
A ring body 66 made of elastic rubber that surrounds and holds the periphery of the microphone main body 65, and a soft sponge 68 that is breathable with open cells attached to both sides so as to cover the small holes 67 for communication of the microphone main body 65; A terminal portion 69 penetrating the ring body 66 from the microphone body 65 and protruding to the outside.

As shown in FIG. 9, a connection pattern plate 29 electrically connected to the second microphone 7 is formed by forming a thin insulating plate 71 made of a polyimide resin or the like bent into a tapered shape on a surface of a copper plate. Three conductor patterns 72 such as foil,
This is a so-called flexible printed board formed by forming three parallel conductor connecting patterns 74, 75, and 76 at the end portions thereof. Terminal part 69 of microphone 2
Is soldered to each of the two terminal patterns. The surfaces of the connection patterns 74, 75, 76 are plated with Au.

In FIG. 9, the first connection pattern 74, the second connection pattern 75, and the third connection pattern 76 are used to identify the three connection patterns. The connection patterns 75 and 76 of No. 3 are connected to the microphone body 65 by conductor patterns 72 and 73, respectively.
4 indicates that the conductor pattern 74-1 extending in parallel with the conductor pattern 72 reaches the microphone body 65 direction,
In 4-2, it is configured to be electrically connected to the conductor pattern 72, that is, the second connection pattern 75.

The procedure for incorporating the second microphone 7 into the opening / closing cover 6 will be described with reference to FIG. FIG. 11A is a front view, and FIG. 11B is a partial side view in the direction of arrow H in FIG.

The second microphone 7 is positioned between the arc-shaped wall 41 and the rib 42 on the inner surface of the front cover 23 described in FIG. 3, as shown in FIG. The tape is pasted as a disk-shaped ring, and the ring body 6 of the second microphone 7 is
6 is adhered and fixed.

At the same time, the connection pattern plate 29 is
3 and the connection patterns 74, 75, and 76 at the distal ends are inserted into the circular concave holes 52 of the leg 22.
, Which will be described later in detail. In this state, as described with reference to FIGS. 7 and 8,
It is assembled by combining and combining the inner cover 24 with the front cover 23.

Prior to assembling the inner cover 24, a disc-shaped annular double-sided adhesive tape is also applied to the concave surface 61 shown in FIG. As a result of the ring body 66 of the second microphone 7 being bonded and fixed, the second microphone 7 is sandwiched between both surfaces of the front cover 23 and the inner cover 24 and is placed in the sealed space of the ring body 66 to be bonded. Confined securely.

The portion where the terminal plate 69 of the second microphone 7 penetrates the ring body 66 is covered with a rubber adhesive before the connection pattern plate 29 is connected by soldering, so that the microphone body 65 is Since it is completely closed and located in the independent space and is held by the rubber elasticity of the ring body 66, external vibrations and shocks are not transmitted to the microphone main body 65, and only the communication hole 28 and the air hole 44 communicate with the outside. Since the communication is established, good call sound quality is guaranteed.

Regarding the fact that the second microphone 7 is electrically connected to the circuit of the circuit board 27 in the apparatus body 9,
This will be described with reference to FIG. FIG. 12 is an external perspective view of a shaft body 31 attached to the apparatus main body 9 side.

FIG. 13 is an external view of the shaft body 31 as viewed from each direction. FIG. 13A is a side view, FIG. 13B is a plan view, and FIG. (a) is shown in the outer end view, and (d) is shown in the inner end view in (a).

The shaft body 31 is made of a synthetic resin molded product, and has a conductive plate spring having elasticity in the axial direction of the shaft body embedded therein and penetrates and protrudes from both sides inside and outside. The synthetic resin-molded portion has a large-diameter shaft portion 77 at the center, a fitting shaft portion 78 on the near side in the drawing, and three radially projecting portions on the end surface side of the fitting shaft portion 78. Engaging projection 79, a locking projection 81 located between the engaging projections 79 and protruding in the axial direction from the end face of the shaft 77, and a shaft on the opposite side of the fitting projection 78 with the shaft 77 at the center. Elastic contact piece support shaft 82 smaller in diameter than portion 77
And consisting of

The reference numerals of the elastic contact piece 33 and the elastic contact piece 34 described with reference to FIG. 2 are changed, and here, first, second, and third elastic contact pieces 83, 84, 85, and first and second elastic contact pieces are used. , The third elastic contact pieces 86, 87, 88 will be described in detail below with reference to the drawings.

The conductive leaf spring protrudes from the end surface of the fitting shaft portion 78, extends so as to hang down in parallel with the oblique direction, and has its first end wound and folded back.
The elastic contact piece 84, the third elastic contact piece 85, and the elastic contact piece support shaft portion 82, as shown in FIG. Three parallel firsts that project more radially than 77
And second and third elastic contact pieces 86, 87, 88.

A leaf spring having such a special structure is well shown in a perspective view in which the synthetic resin portion shown in FIG. 14 is shown as a two-dot chain line. That is, the first elastic contact piece 83 is continuous and integral with the first elastic contact piece 86, the second elastic contact piece 84 is integral with and continuous with the second elastic contact piece 87, and the third elastic contact piece The contact piece 85 is formed integrally and continuously with the third elastic contact piece 88 by bending, respectively. For example, each of the contact pieces 85 is formed by processing a phosphor bronze plate for a spring and molding the same into a synthetic resin, and forming the exposed surface. Is Au
Plating is applied.

The shaft body 31 is attached to the apparatus main body 9 as shown in an enlarged perspective view of a main part in FIG. That is, a circular through hole 89 opened at the end face and an opening 9 expanded to three places around the end face are provided on the right side end face of the opening / closing cover support section 21 below the front case 15.
1 and an arc-shaped engagement hole 92 provided between the opening 91.
And a slightly larger hole 93 at one end of the engagement hole 92.
And are formed.

Here, as shown in FIG.
The shaft body 31 is positioned on the axis 9 and approaches the through hole 89. At this time, when the shaft 31 is rotated rightward (clockwise) around its axis and the engagement projection 79 is set so as to exactly coincide with the opening 91, the locking projection 81 is engaged with the hole 93 of the engagement hole 92. Match position. In these configurations, the positional relationship is set in advance so that such a configuration is possible.

The first to third elastic contact pieces 83, 84, 8
5 is such that by selecting between the enlarged openings 91, it is possible to enter the inside of the through hole 89 of the front case 15, and the engaging projection 79 is fitted into the opening 91. Further, by pushing, the locking projection 81 can be fitted into the hole 93 at the end of the engagement hole 92.

The shaft 77 is brought into contact with the end face of the opening / closing cover support 21 by being pushed in in this manner.
9 is located on the inner surface of the through hole 89. When the shaft 31 is rotated to the left (counterclockwise) in this state, the locking protrusion 81
Moves along the engagement hole 92 and reaches the end of the engagement hole 92 to be positioned.

This state is shown in FIG. 16, where the first, second,
The vertices of the third elastic contact pieces 86, 87, 88 are located on the upper side in the figure. In addition, the engagement protrusion 79 is in contact with the inner wall surface of the through hole 89 to restrict the axial movement of the shaft body 31. That is, the position is fixed. The locking projection 81 is pressed against the inner wall surface of the engagement hole 92, and the position in the rotation direction is defined to the end, and the rotation in the direction opposite to the direction fitted by the rotation due to the frictional contact force is also performed. Will be blocked.

Since the interval between the adjacent portions of the shaft portion 77 and the engaging projection 79 is set so as to match the wall thickness of the through hole 89, the above-mentioned fixed state is obtained. It is preferable to supply a small amount of an appropriate adhesive to secure the fixing.

The connection of the second microphone 7 with the circuit on the circuit board 27 in the apparatus main body 9 will be described with reference to a perspective view of a separated state shown in FIG. In addition,
FIG. 17 shows only the front case 15 of the apparatus main body 9 for convenience, and only the main part of the circuit board 27 is shown. Circuit board 2
The first microphone 5 is mounted and mounted on the upper side surface of the lower end portion, and connection patterns 94, 95, 96 for connecting to the second microphone 7 formed of a circuit pattern are provided in adjacent portions.
Are formed.

In the figure, the second microphone 7 is shown separated from the opening / closing cover 6, but this is achieved by incorporating the second microphone 7 into the opening / closing cover 6 as described above, Opening / closing cover 6 on support portion 21
Are attached and opened and closed freely, and the circuit board 27 is assembled in the apparatus main body 9 so that the elastic contact pieces 83, 84, and 85 of the shaft body 31 are connected to the circuit pattern connection pattern 94, 95 and 96 respectively.

With respect to the connection by pressure contact as described above,
Referring to an enlarged perspective view of a main part of FIG. 18 in which only the circuit board 27 and the shaft body 31 are shown, a first connection pattern 94, a second connection pattern 95, and a third connection pattern formed of a circuit pattern are formed on the circuit board 27. And first, second, and third elastic contact pieces 83, 84, 8 corresponding to the connection patterns 96, respectively.
5, is located.

Since the shaft body 31 is attached to the front case 15 of the apparatus main body 9 as described with reference to FIGS. 15 and 16, the circuit boards 27 become closer to each other when the circuit board 27 is incorporated into the apparatus main body 9. , The first, second, and third elastic contact pieces 83, 84, 85 are brought into contact with each other in a pressed state by elastic deformation.

Next, the connection state between the shaft body 31 and the connection pattern plate 29 accompanying opening and closing of the opening / closing cover 6 will be described.
This will be described with reference to the enlarged side views of the main parts in FIGS. In both figures, the opening / closing cover 6 is used to facilitate understanding.
The inside is shown as a state in which the side wall surface on the outside of the leg portion 22 is broken away.

First, referring to FIG. 19 in a state in which the opening / closing cover 6 is closed on the front surface of the apparatus main body 9, the connection of the tip of the connection pattern plate 29 of the second microphone assembly described with reference to FIGS. The portions of the patterns 74, 75, and 76 are curved so as to fit along the inner surfaces of the circular concave holes 52 of the leg portions 22 of the opening / closing cover 6, and the surface of the insulating plate 71 is attached as shown.

To attach in this manner, the connection pattern 7 is fixed by bonding with a double-sided adhesive tape (not shown) or attaching with an appropriate adhesive.
The sides 4, 75 and 76 are to be the inner surfaces.

Further, as shown in the figure, the surface of the circular concave hole 52 to which the connection pattern plate 29 is attached is made to have a large diameter corresponding to the thickness, so that a circular surface adjacent to the attached surface is formed. If a discontinuous surface is not formed on the inner surface of the concave hole 52, good results can be obtained.

The state of the connection patterns 74, 75 and 76 of the connection pattern plate 29 with respect to the circular concave hole 52 is attached as shown in FIG. That is, the connection pattern plate 29 is positioned at the back side of the circular concave hole 52, and a portion corresponding to the width of the shaft portion 77 of the shaft body 31 is secured on the opening side of the circular concave hole 52 as a circle.

Therefore, as shown in FIG.
Is attached, the shaft portion 77 is in the circular concave hole 52.
And the first, second, and third elastic contact pieces 86, 8
7 and 88 are elastically deformed and fitted so as to contact the inner surface of the circular concave hole 52.

As shown in FIG. 19, the connection patterns 74, 75 and 76 are located on the lower side in the figure, and the first, second and third elastic contact pieces 86, 87 and 88 are on the upper side in the figure. When the opening / closing cover 6 is closed, the connection patterns 74, 75,
76, first, second and third elastic contact pieces 86, 87, 8
8 are circumferentially spaced apart from each other, and no electrical contact connection is made between them.

By opening the opening / closing cover 6 from this state, the relative positional relationship is such that the circular concave hole 52 is rotated along the periphery of the shaft portion 77. Is fixed at the illustrated position, and the connection patterns 74, 75 and 76 are pivotally moved about the shaft 31 to the left in the counterclockwise direction with the rotation of the leg 22.

The pivoting and opening in this manner is due to the driving force of a pivoting device described later.
It is stopped in the open position shown at 0. In the open position of FIG. 20, the first, second, and third elastic contact pieces 8
6, 87, 88 are electrically connected to the connection patterns 74, 75, 76 extending from the second microphone 7 by elastic contact.

Needless to say, it is needless to say that the connection is ensured over the length range of the connection patterns 74, 75, 76 before and after the open position. Even if moved by
There is no effect on the call state of the second microphone 7.

As described above, each of the three connection patterns 74, 75, 76 described in FIG. 9 and the three connection patterns 94, 95, 96 of the circuit board 27 described in FIG. FIG. 2 illustrates the electrical connection relationship.
0, each elastic contact piece 86, 8 of the shaft body 31
7 and 88 and the connection patterns 74, 75 and 76 on the second microphone 7 side are connected as follows.

That is, the first connection pattern 94 of the circuit board 27 is transferred from the first elastic contact piece 83 of the shaft 31 via the first elastic contact piece 86 to the first connection pattern 94 on the second microphone 7 side.
Is connected to the connection pattern 74.

The second connection pattern 95 of the circuit board 27
Is connected from the second elastic contact piece 84 of the shaft body 31 to the second connection pattern 75 on the second microphone 7 side via the second elastic contact piece 87.

The third connection pattern 96 of the circuit board 27
Is connected to the third connection pattern 76 on the second microphone 7 side from the third elastic contact piece 85 of the shaft body 31 via the third elastic contact piece 88.

As described above, the conductor pattern 74-1 extending from the first connection pattern 74 is connected to the conductor pattern 72 extending from the second connection pattern 75 at the connection portion 74-2. , The second connection pattern 75 and the third connection pattern 76 are connected to the microphone body 65 by conductor patterns 72 and 73, respectively.

In the process of closing the opening / closing cover 6 from the state shown in FIG. 20, the connection patterns 74, 75, 76
1 is rotated clockwise to the right, to the position shown in FIG. 19 which is circumferentially separated from the first, second, and third resilient contact pieces 86, 87, and 88. A call using one microphone 5 is enabled.

The manner in which the cover 6 is openably and closably connected to the apparatus body 9 will be described with reference to FIG. FIG. 21 shows only a main part of the front case 15 of the apparatus body 9 as a front view in FIG. 21A and a side view in FIG.

Here, only the parts necessary for connecting the opening / closing cover 6 are shown and described, and the description of the other parts is omitted.
Please refer to the explanation of the relevant portions described above together with the drawings.

On the right side of the opening / closing cover support portion 21 in the figure, the first, second and third shaft portions 77 of the shaft body 31 fitted into the circular concave holes 52 formed in the leg portions 22 of the opening / closing cover 6 are provided. Along with the elastic contact pieces 86, 87, 88, a rectangular rotating shaft 98 of a rotating device 97 incorporated therein is projected on the left side in the figure.

Although not shown, the rotating device 97 has a torsion coil spring incorporated in a closed container, and a rectangular rotation which is an end of a rotating shaft connected to the torsion coil spring in the closed container. A driving shaft 98 is provided to project in a rectangular shape as shown in the figure. The centers of the shaft portion 77 of the shaft body 31 and the rectangular rotating shaft 98 are provided on the same axis.

The torsion coil springs are combined and have the functions described below.
In the free state, the long side direction of the protruding rectangular rotating shaft 98 is set at an angular position as shown in FIG.
Further, from this state, it can rotate in both directions.

The shaft 77 and the rectangular rotating shaft 98 are connected to the circular recess 52 of the leg 22 of the cover 6 and the rectangular recess 4.
The opening / closing cover 6 can be freely opened and closed by fitting it into the opening 9.

The second microphone 7 is incorporated in the opening / closing cover 6 as described with reference to FIG. 11, and the connection patterns 74, 75, 76 are connected to the circular concave holes 52 in the leg portions 22 as described with reference to FIG. The opening side of the circular concave hole 52 is fitted to the shaft portion 77 in a state of being attached inside.

Subsequently, the rectangular leg 49 is fitted to the rectangular pivot shaft 98 while expanding the space between the two legs 22 against the elasticity of the synthetic resin of the opening / closing cover 6. The elasticity is restored between the two, and both ends of the opening / closing cover support portion 21 are sandwiched between the two leg portions 22.

When combining in this manner, the shaft 7
7 and the circular concave hole 52 can be fitted in any direction,
The rectangular concave hole 49 cannot be fitted unless it is aligned with the direction of the rectangular shape of the rectangular rotating shaft 98, so that positioning in such a direction is necessary.

FIG. 22 shows a side view of the assembled state as described above. In the illustrated state, the rectangular rotating shaft 98 is in the free state position, that is, the position of the opening / closing cover 6 is the open position, and is also the state described in FIG.

FIG. 23A shows a position where the opening / closing cover 6 is further opened from the state shown in FIG. 22 and is flush with the apparatus main body 9. This is advantageous because, in the event that the cover 6 is erroneously pressed while the apparatus main body 9 is placed on a desk or the like, inconvenience such as breakage of the cover 6 is prevented. Is immediately restored to the state shown in FIG. 22 by the restoring force of the torsion coil spring in the rotation device 97.

By rotating the open / close cover 6 so as to cover the surface of the apparatus main body 9 from the state shown in FIG. 22, the position shown in FIG. 23B can be obtained. The front end surface of the opening / closing cover 6 pushes the locking projection 11 which is elastically urged and protrudes on the side of the apparatus main body 9, and the locking projection 11 projects into the recess 12 at the position of the recess 12 and engages with the opening / closing cover 6. Is held in this position. That is, the closed state is maintained, and the torsion coil spring in the rotating device 97 stores the torsional force in the restoring direction.

When the opening / closing cover 6 is required to be opened from this state, the button 13 on the side of the apparatus main body 9 is pushed in so that the locking projection 11 is linked to the retracted position drawn into the apparatus main body 9, The engagement with the recess 12 is released.

The rectangular rotating shaft 98 is rotated in the restoring direction by the restoring force accumulated in the torsion coil spring in the rotating device 97, and the opening / closing cover 6 is brought to the open position shown in FIG. This opening operation is not a sudden movement, but a smooth movement (oil damper action) due to the viscosity of the brake oil filled in the rotating device 97, and an impact on the first microphone 5 and the second microphone 7. This eliminates the effect of the entry of sound and abrasion noise.

The opening / closing cover 6 is configured to prevent further rotation in the opening direction in the state shown in FIG. 23 (a). The parts 22, 22 are elastically deformed and spread,
It will come off from the shaft part 77 and the rectangular rotating shaft 98,
No damage. In this case, they can be combined again to make them usable.

In the above description, it has been described that the first microphone 5 is provided in the opening / closing cover support portion 21 of the apparatus main body 9 and the second microphone 7 is provided on the inner surface side of the opening / closing cover 6. An embodiment according to switching between the microphone 5 and the second microphone 7 for talking will be described below.

FIG. 24 is an explanatory diagram of the switching operation of the first and second microphones.

In FIG. 24, reference numeral 5 denotes a first microphone, and 7 denotes a second microphone. 86, 87,
Reference numeral 88 denotes a first elastic contact piece, a second elastic contact piece, and a third elastic contact piece provided on the support shaft portion 82 of the shaft body 31, respectively. It is connected.

Reference numerals 74, 75, and 76 denote the first connection pattern, the second connection pattern, and the third connection pattern of the connection pattern plate 29 on the open / close cover side, respectively. It is connected to a microphone body 65 which is the second microphone 7 via a wiring pattern.

When the opening / closing cover is closed, the respective elastic contact pieces and the connection pattern are not in contact with each other. When the opening / closing cover is open, the first elastic contact piece 86 and the first elastic contact piece 86 are not in contact with each other. The connection pattern 74, the second elastic contact piece 87 and the second connection pattern 75, and the third elastic contact piece 88 and the third connection pattern 76 are in contact with each other, and the second microphone is located inside the apparatus main body. Circuit.

Reference numeral 101 denotes a first resistor for supplying a DC bias current to the first microphone 5; 102, a second resistor for supplying a DC bias current to the second microphone 7;
04 is a first OR circuit in which two input terminals are short-circuited, 1
03 is a third resistor for connecting the input terminal of the first OR circuit 104 to the power supply terminal, and 105 is the first OR circuit 10
4 is a first inverter for inverting the output of the first microphone 5, and a first inverter 106 for selecting the output of the first microphone 5.
Switch 107 is a second analog switch for selecting the output of the second microphone 7, 108 and 109
Denotes a first DC cutoff capacitor and a second DC cutoff capacitor, 110 denotes a fourth resistor, 111 denotes a fifth resistor, 112 denotes a sixth resistor, and 113 denotes an amplifier.

The opening and closing of the first analog switch 106 is controlled by the output of the first OR circuit 104, and the opening and closing of the second analog switch 107 is controlled by the output of the first inverter 105. -Control is performed in the reverse of opening and closing of the switch 106. Each analog switch is closed when a logic level "1" is supplied and opened when a logic level "0" is supplied.

Now, when the opening / closing cover is closed, each of the elastic contact pieces and the connection pattern are in a non-contact state, and the input terminal of the first OR circuit 104 is connected to the power supply voltage, that is, the logic level “1”. Is supplied, the logical level of the output of the first OR circuit 104 becomes “1”, and the logical level of the output of the first inverter 105 becomes “0”. Therefore, since the first analog switch 106 is closed and the second analog switch 107 is opened,
The output of the microphone 5 is selected and supplied to the audio amplifier including the amplifier 113, the fourth resistor 110, and the sixth resistor 112.

On the other hand, when the opening / closing cover is opened, each elastic contact piece and the connection pattern are in contact with each other, and the input terminal of the first OR circuit 104 is connected to the ground voltage, that is, the logic level “0”. Is supplied, the logic level of the output of the first OR circuit 104 becomes “0”, and the logic level of the output of the first inverter 105 becomes “1”. Therefore, since the first analog switch 106 is opened and the second analog switch 107 is closed, the output of the second microphone 7 is selected and the amplifier 113,
The signal is supplied to an audio amplifier including a fifth resistor 111 and a sixth resistor 112.

As described above, the first microphone provided on the apparatus main body side and the second microphone provided on the openable cover side can be switched according to the opening and closing of the openable cover.

FIG. 25 shows a second embodiment of the present invention.

In FIG. 25, reference numeral 5 denotes a first microphone, and 7 denotes a second microphone. 86, 87,
Reference numeral 88 denotes a first elastic contact piece, a second elastic contact piece, and a third elastic contact piece provided on the support shaft portion 82 of the shaft body 31, respectively. It is connected.

Reference numerals 74, 75, and 76 denote the first connection pattern, the second connection pattern, and the third connection pattern of the connection pattern plate 29 on the open / close cover side, respectively. It is connected to a microphone body 65 which is the second microphone 7 via a wiring pattern.

When the opening / closing cover is closed, each elastic contact piece is not in contact with the connection pattern. When the opening / closing cover is opened, the first elastic contact piece 86 and the first elastic contact piece 86 are not in contact with each other. The connection pattern 74, the second elastic contact piece 87 and the second connection pattern 75, and the third elastic contact piece 88 and the third connection pattern 76 are in contact with each other, and the second microphone is located inside the apparatus main body. Circuit.

Reference numeral 101 denotes a first resistor for supplying a DC bias current to the first microphone 5; 102, a second resistor for supplying a DC bias current to the second microphone 7;
04 is a first OR circuit in which two input terminals are short-circuited, 1
03 is a third resistor that connects the input terminal of the first OR circuit 104 to the power supply terminal, 105 is a first inverter that logically inverts the output of a second OR circuit described later, and 106 is the first inverter. A first analog switch for selecting the output of the microphone 5, 107 is a second analog switch for selecting the output of the second microphone 7, 108 and 109
Are a first DC cut capacitor and a second DC cut capacitor, respectively, 110 is a fourth resistor, 111 is a fifth resistor, 112 is a sixth resistor, 113 is an amplifier, 11
4 compares the DC voltage at the terminal of the second microphone with the power supply voltage, and outputs a logic level "1" when the DC voltage has a significant voltage difference with respect to the power supply voltage. A comparator that outputs a logic level “0” when they are equal,
Reference numeral 115 denotes a second inverter that inverts the output of the comparator 114, and reference numeral 116 denotes a second OR circuit that performs a logical OR operation on the outputs of the first OR circuit 104 and the second inverter 115.

The opening and closing of the first analog switch 106 is controlled by the output of the second OR circuit 116, and the opening and closing of the second analog switch 107 is controlled by the output of the first inverter 105. -Control is performed in the reverse of opening and closing of the switch 106. Each analog switch is closed when a logic level "1" is supplied and opened when a logic level "0" is supplied.

Now, when the opening / closing cover is closed, each of the elastic contact pieces and the connection pattern are in a non-contact state, and the input terminal of the first OR circuit 104 is connected to the power supply voltage, that is, the logic level “1”. Is supplied, the logical level of the output of the first OR circuit 104 becomes “1”. Therefore, the output of the second OR circuit 116 also becomes the logic level “1”, and the logic level of the output of the first inverter 105 becomes “0”. Therefore, the first analog switch 106 is closed and the second analog switch 107
Is opened, the output of the first microphone 5 is selected, and the amplifier 113, the fourth resistor 110, and the sixth resistor 11
2 is provided to the audio amplifier.

On the other hand, when each elastic contact piece and the connection pattern come into contact with the opening / closing cover opened, the input terminal of the first OR circuit 104 has the ground voltage, that is, the logic level. Since “0” is supplied, the logic level of the output of the first OR circuit 104 becomes “0”.

At this time, since it is assumed that each elastic contact piece and the connection pattern are in contact with each other, if the second microphone 7 is normal, the DC bias current is applied to the second microphone 7. Is supplied, and the DC voltage at the terminal of the second microphone has a significant difference with respect to the power supply voltage. Therefore, the comparator 114 outputs a logical level “1” and the second inverter 115 outputs a logical level “0”, so that the second OR circuit 116 also outputs a logical level “0”. As a result, the first inverter 105
Becomes "1". Therefore, the first
Analog switch 106 is opened and the second analog
Since the switch 107 is closed, the output of the second microphone 7 is selected and supplied to the audio amplifier including the amplifier 113, the fifth resistor 111, and the sixth resistor 112.

As described above, the basic function of switching between the first microphone provided on the apparatus main body side and the second microphone provided on the opening / closing cover side according to the opening / closing of the opening / closing cover is realized. it can.

Now, it is assumed that only the third connection pattern 76 and the third elastic contact piece 88 do not come into contact with each other even when the cover is opened. In this case, since no DC bias current is supplied to the second microphone, the DC voltage at the terminal of the second microphone becomes equal to the power supply voltage, and the comparator 114 outputs a logical level “0”. Therefore, the second inverter 115 has the logic level “1”.
, The second OR circuit 116 outputs a logical level “1”, and the first inverter 105 outputs a logical level “0”. As a result, even when the cover is opened, the first analog switch 106 is closed and the second analog switch 106 is closed.
Is opened, the output of the first microphone 5 is selected and supplied to the audio amplifier composed of the amplifier 113, the fourth resistor 110 and the sixth resistor 112.

That is, the unusable second microphone 7
Is cut off from the circuit in the device body, and the first available
Microphone 5 is connected to a circuit in the apparatus main body.

Next, it is assumed that only the second connection pattern 75 and the second elastic contact piece 87 do not come into contact even when the cover is opened. In this case, the second inverter 115 outputs a logical level “0”, but the first OR circuit 104 outputs a logical level “1”.
The second OR circuit 116 outputs a logical level “1”,
The first inverter 105 outputs a logic level “0”. As a result, even when the opening / closing cover is opened, the first analog switch 106 is closed and the second analog switch 107 is opened, so that the output of the first microphone 5 is selected and the amplifier 113 and the fourth It is supplied to an audio amplifier comprising a resistor 110 and a sixth resistor 112.

That is, although the second microphone 7 can be used but has low reliability, the second microphone 7 is cut off from the circuit in the apparatus main body, and the first microphone 7 is cut off.
Microphone 5 is connected to a circuit in the apparatus main body.

Furthermore, even if the opening / closing cover is opened, the first
It is assumed that only the connection pattern 74 and the first elastic contact piece 86 do not come into contact with each other. Also in this case, no DC bias current is supplied to the second microphone, and the second inverter 115 outputs a logical level “1”.
Therefore, regardless of the output of the first OR circuit 104, the second OR circuit 116 outputs a logical level "1", and the first inverter 105 outputs a logical level "0". As a result, even when the cover is open,
Since the first analog switch 106 is closed and the second analog switch 107 is opened, the first microphone 5
Is selected and supplied to an audio amplifier including an amplifier 113, a fourth resistor 110, and a sixth resistor 112.

That is, the unusable second microphone 7 which is not connected to the ground is cut off from the circuit in the apparatus main body, and the usable first microphone 5 is connected to the circuit in the apparatus main body.

Up to now, in order to explain the function of the configuration of FIG. 25 in detail, the description has been made on the assumption that one of the connection patterns and the elastic contact piece do not come into contact with each other. It can be understood that the first microphone is also selected in the case of. Therefore, even when the two connection patterns and the elastic contact piece do not come into contact with each other,
It can be easily understood that the first microphone 5 is always selected even when all three connection patterns do not come into contact with the elastic contact pieces.

In the case where the opening / closing cover is detached or lost, it is the same as the case where all three connection patterns and the elastic contact pieces do not come into contact with each other.
According to the configuration 5, even when the opening / closing cover is lost, the communication function can be realized by the first microphone.

Further, the above description has been made assuming that the second microphone 7 is normal. However, even when the second microphone 7 is abnormal in the open mode, the DC bias is applied to the second microphone 7. Since no current is supplied,
The first microphone 5 can be selected.

FIG. 26 shows a configuration in which an abnormality in the short-circuit state of the second microphone can be remedied.

In FIG. 26, reference numeral 5 denotes a first microphone, and 7 denotes a second microphone. 86, 87,
Reference numeral 88 denotes a first elastic contact piece, a second elastic contact piece, and a third elastic contact piece provided on the support shaft portion 82 of the shaft body 31, respectively. It is connected.

Reference numerals 74, 75 and 76 denote the first connection pattern, the second connection pattern and the third connection pattern of the connection pattern plate 29 on the open / close cover side, respectively. It is connected to a microphone body 65 which is the second microphone 7 via a wiring pattern.

When the opening / closing cover is closed, each elastic contact piece and the connection pattern are not in contact with each other. When the opening / closing cover is opened, the first elastic contact piece 86 and the first elastic contact piece 86 are not in contact with each other. The connection pattern 74, the second elastic contact piece 87 and the second connection pattern 75, and the third elastic contact piece 88 and the third connection pattern 76 are in contact with each other, and the second microphone is located inside the apparatus main body. Circuit.

Reference numeral 101 denotes a first resistor for supplying a DC bias current to the first microphone 5; 102, a second resistor for supplying a DC bias current to the second microphone 7;
04 is a first OR circuit in which two input terminals are short-circuited, 1
03 is a third resistor that connects the input terminal of the first OR circuit 104 to the power supply terminal, 105 is a first inverter that logically inverts the output of a second OR circuit described later, and 106 is the first inverter. A first analog switch for selecting the output of the microphone 5, 107 is a second analog switch for selecting the output of the second microphone 7, 108 and 109
Are a first DC cut capacitor and a second DC cut capacitor, respectively, 110 is a fourth resistor, 111 is a fifth resistor, 112 is a sixth resistor, 113 is an amplifier, 11
4 compares the DC voltage at the terminal of the second microphone with the power supply voltage, and outputs a logic level "1" when the DC voltage has a significant voltage difference with respect to the power supply voltage. A comparator that outputs a logic level “0” when they are equal,
115 is a second inverter for logically inverting the output of the comparator 114, 116 is a second OR circuit for calculating the logical sum of the outputs of the first OR circuit 104 and the second inverter 115, and 117 is the second OR circuit Is a third inverter that detects that the DC voltage of the terminal of the microphone 7 has abnormally dropped.

The opening and closing of the first analog switch 106 is controlled by the output of the second OR circuit 116, and the opening and closing of the second analog switch 107 is controlled by the output of the first inverter 105. -Control is performed in the reverse of opening and closing of the switch 106. Each analog switch is closed when a logic level "1" is supplied and opened when a logic level "0" is supplied.

Since the operation of the configuration of FIG. 26 is substantially the same as the operation of the configuration of FIG. 25, only the case where the second microphone 7 is short-circuited and abnormal will be described.

When the second microphone 7 is abnormal due to the short-circuit state, the third inverter outputs a logical level “1”, so that the output of the first OR circuit 104 and the output of the second inverter 115 can be determined. Irrespective of the second OR circuit 11
6 outputs a logic level "1", and the first inverter 10
5 outputs a logic level "0". As a result, even when the open / close cover is closed, the first analog switch 1
06 is closed and the second analog switch 107 is opened, so that the output of the first microphone 5 is selected and the amplifier 1
13, and supplied to an audio amplifier comprising a fourth resistor 110 and a sixth resistor 112.

That is, with the configuration shown in FIG. 26, the first problem is caused by all possible failure factors on the open / close cover.
Microphone 5 can be connected to a circuit in the apparatus main body.

In the configuration shown in FIG. 26, if a comparator is used instead of the third inverter, the open / close cover side can be considered even when the second microphone is not in an abnormal condition in a completely short circuit state. Thus, the first microphone 5 can be connected to the circuit in the apparatus main body in all the trouble factors.

FIG. 27 shows a configuration for preventing malfunction due to voice.

In FIG. 27, reference numeral 5 denotes a first microphone, and reference numeral 7 denotes a second microphone. 86, 87,
Reference numeral 88 denotes a first elastic contact piece, a second elastic contact piece, and a third elastic contact piece provided on the support shaft portion 82 of the shaft body 31, respectively. It is connected.

Reference numerals 74, 75, and 76 denote the first connection pattern, the second connection pattern, and the third connection pattern of the connection pattern plate 29 on the open / close cover side, respectively. It is connected to a microphone body 65 which is the second microphone 7 via a wiring pattern.

When the opening / closing cover is closed, each elastic contact piece is not in contact with the connection pattern, and when the opening / closing cover is open, the first elastic contact piece 86 and the first elastic contact piece 86 are not in contact with each other. The connection pattern 74, the second elastic contact piece 87 and the second connection pattern 75, and the third elastic contact piece 88 and the third connection pattern 76 are in contact with each other, and the second microphone is located inside the apparatus main body. Circuit.

Reference numeral 101 denotes a first resistor for supplying a DC bias current to the first microphone 5; 102, a second resistor for supplying a DC bias current to the second microphone 7;
04 is a first OR circuit in which two input terminals are short-circuited, 1
03 is a third resistor that connects the input terminal of the first OR circuit 104 to the power supply terminal, 105 is a first inverter that logically inverts the output of a second OR circuit described later, and 106 is the first inverter. A first analog switch for selecting the output of the microphone 5, 107 is a second analog switch for selecting the output of the second microphone 7, 108 and 109
Are a first DC cut capacitor and a second DC cut capacitor, respectively, 110 is a fourth resistor, 111 is a fifth resistor, 112 is a sixth resistor, 113 is an amplifier, 11
4 compares the DC voltage at the terminal of the second microphone with the power supply voltage, and outputs a logic level "1" when the DC voltage has a significant voltage difference with respect to the power supply voltage. A comparator that outputs a logic level “0” when they are equal,
115 is a second inverter for logically inverting the output of the comparator 114, 116 is a second OR circuit for calculating the logical sum of the outputs of the first OR circuit 104 and the second inverter 115, and 117 is the second OR circuit A third inverter 11 that detects that the DC voltage at the terminal of the microphone 7 has dropped significantly.
8 is a seventh resistor, and 119 is a capacitor.

The opening and closing of the first analog switch 106 is controlled by the output of the second OR circuit 116, and the opening and closing of the second analog switch 107 is controlled by the output of the first inverter 105. -Control is performed in the reverse of opening and closing of the switch 106. Each analog switch is closed when a logic level "1" is supplied and opened when a logic level "0" is supplied.

Since the operation of the configuration of FIG. 27 is substantially the same as that of the configuration of FIG. 26, only the function of preventing malfunction due to voice will be described here.

The condenser microphone changes the bias current when voice is input, and converts voice and electrical signals according to the change in the current.

Therefore, the terminal voltage of the condenser microphone changes according to the presence / absence of audio input and the level of the audio level. Since this voltage is supplied to the comparator 114, the voltage of the inverting input terminal of the comparator 114 may return to the power supply voltage when the sound is paused. At this time, the comparator 114 outputs the logical level “0” for a moment, and there is a possibility that the first microphone is momentarily selected even though the second microphone should be originally selected.

Therefore, in the configuration of FIG. 27, the seventh resistor 1
18 and a capacitor 119,
Of the microphone terminal voltage of the
14 inverting input terminals. Thus, it is possible to prevent the comparator 114 from malfunctioning due to the presence / absence of voice and the fluctuation of the voice level.

The configuration shown in FIG. 27 is obtained by adding a smoothing circuit including a resistor and a capacitor to the configuration shown in FIG. 26, but can be added to the configuration shown in FIG.

In FIGS. 25 to 27, the connection mechanism between the circuit in the apparatus main body and the second microphone provided on the opening / closing cover side has been described as being limited to the mechanism according to the present invention. It is also possible to adopt a method. For example, a connection mechanism for connecting a circuit in the apparatus body and the second microphone with a connection lead wire may be used. Rather, in the case of this connection mechanism, the risk of disconnection of the connection lead wire is high, so the effect of the present invention can be said to be great.

The present invention is not limited to the above embodiment, but can be widely applied to other communication devices such as various types of portable telephones. Further, the present invention is not limited to switching the circuit connection between the first and second microphones, but the switching can make a more effective call.

[0160]

As described above in detail, according to the portable communication apparatus of the present invention, the first microphone and the second microphone and the opening / closing cover are provided on the inner side of the opening / closing cover for covering the front surface of the apparatus body. By providing a switch means for switching the connection between the first and second microphones when the opening / closing cover is opened / closed at the center of rotation, an effective telephone call can be made regardless of whether the opening / closing cover is open or closed.

The first microphone and the opening / closing cover for covering the front surface of the apparatus main body are provided with the second microphone and the connection pattern and the opening / closing cover connected to the second microphone at the rotating portion of the opening / closing cover. An elastic contact piece connected to a circuit in the apparatus main body is provided on a shaft of the apparatus main body to be supported and rotated, so that the connection pattern and the elastic contact piece are separated from each other when the opening / closing cover is closed. When the opening / closing cover is open, the elastic contact piece is connected to the first microphone on the main body side, so that the second microphone on the opening / closing cover is automatically switched to enable an effective call. I do.

A first microphone is provided in the apparatus main body, and a second microphone is provided on an inner surface side of an opening / closing cover for covering the front surface of the apparatus main body, and a connection connected to the second microphone is provided on one side of a rotating portion of the opening / closing cover. A resilient contact piece connected to a circuit in the device main body outside the shaft of the device main body for supporting and rotating the opening / closing cover and a connection pattern inside the shaft body, which is a circuit pattern of a circuit board in the device main body. Is provided with an elastic contact piece that is elastically contacted with the first and second microphones according to the open / close state of the open / close cover, and the second microphone and the circuit in the apparatus main body can be used. The connection between the circuit board and the connection pattern, which is the circuit pattern of the circuit board, by the elastic contact piece inside the shaft is used to connect the circuit board. Workability at the time of manufacture or during maintenance and inspection because it can disconnect can be conveniently carried out.

According to the fourth means of the present invention, disconnection may occur between the second microphone and a circuit in the apparatus main body due to some cause, when the second microphone is abnormal, or in the worst case, the opening / closing cover itself comes off. , Even if it ’s lost,
The call function of the portable communication device can be ensured by the first microphone.

As described above, according to the portable communication device of the present invention, it is possible to make a call using the first and second microphones, and also to connect and disconnect the circuit connection between the second microphone and the device body. Can be easily carried out, and various practically remarkable effects can be obtained.

[Brief description of the drawings]

FIG. 1 is an external view of a portable communication device according to the present invention.

FIG. 2 is a front view and a cross-sectional view of a main part of the portable communication device of the present invention.

FIG. 3 is a view of the front cover as viewed from the inside.

4 is a sectional view taken along line BB and a sectional view taken along line CC of FIG. 3;

5A and 5B are a view of the inner cover as viewed from the front side and a cross-sectional view of a main part.

FIG. 6 is a view of the inner cover as viewed from the inner surface.

FIG. 7 shows a combined state of a front cover and an inner cover.

8 is a sectional view taken along line FF and a sectional view taken along line GG of FIG. 7;

FIG. 9 is an external view of a second microphone assembly.

FIG. 10 is an enlarged cross-sectional side view of a second microphone.

FIG. 11 is an explanatory diagram of a procedure for assembling a second microphone in an opening / closing cover.

FIG. 12 is an external view of a shaft body (part 1).

FIG. 13 is an external view of a shaft body (part 2).

FIG. 14 is a configuration perspective view of a leaf spring in a shaft body.

FIG. 15 is an explanation (part 1) of a procedure for attaching the shaft to the apparatus main body.

FIG. 16 is a diagram (part 2) illustrating a procedure for attaching the shaft body to the apparatus main body.

FIG. 17 is an explanatory diagram illustrating that a second microphone is connected to a circuit on a circuit board.

FIG. 18 is an enlarged view of a main part of FIG. 17;

FIG. 19 is an explanatory view (1) of a connection state between a connection pattern and an elastic contact piece.

FIG. 20 is an explanatory view (2) of a connection state between the connection pattern and the elastic contact piece.

FIG. 21 is an external view of a main part of an apparatus main body.

FIG. 22 is an explanatory diagram (part 1) of the operation of the opening / closing cover.

FIG. 23 is an operation explanatory view (part 2) of the opening / closing cover.

FIG. 24 is an explanatory diagram of a switching operation of the first and second microphones.

FIG. 25 is a second embodiment of the present invention.

FIG. 26 shows a configuration in which an abnormality in a short-circuit state of a second microphone can be remedied.

FIG. 27 shows a configuration for preventing malfunction due to voice.

[Description of Signs] 1 portable communication device 2 earpiece 3 display unit 4 push button unit 5 first microphone 6 opening / closing cover 7 second microphone 8 antenna 9 device body 11 locking projection 12 recess 13 button 15 front case 16 Back case 17 Battery 21 Open / close cover support 22 Leg 23 Front cover 24 Inner cover 25 Space 27 Circuit board 28 Communication hole 29 Connection pattern plate 31 Shaft 32 Shaft portion 33 Elastic contact piece 34 Elastic contact piece 41 Arc Wall 42 Rib 43 Projection pair 44 Vent hole 45 Side wall 46 End face wall 47 Step 48 Concave part 49 Rectangular concave hole 51 Notch part 52 Circular concave hole 53 Guide groove 54 Notch part 55 Projection 56, 57 Projection 58 Projection 59 Convex part 61 Concave surface 65 Microphone body 66 Ring body 67 Small hole 68 Sponge 69 Terminal part, terminal plate 71 Insulating plate 72, 73 Conductor pattern 74 Connection pattern, first connection pattern 75 Connection pattern, second connection pattern 76 Connection pattern, third connection pattern 76-1 Conductor Pattern 76-2 Connection part 77 Shaft part 78 Fitting shaft part 79 Engagement projection 81 Locking projection 82 Elastic contact piece support shaft part 83 First elastic contact piece 84 Second elastic contact piece 85 Third elastic contact piece 86 first elastic contact piece 87 second elastic contact piece 88 third elastic contact piece 89 through hole 91 opening 92 engaging hole 93 hole 94 first connection pattern 95 second connection pattern 96 third connection Pattern 97 rotating device 98 rectangular rotating shaft 101 first resistor 102 second resistor 103 third resistor 104 first OR circuit 105 first inverter 106 first analog Switch 107 Second analog switch 108 First DC cut capacitor 109 Second DC cut capacitor 110 Fourth resistor 111 Fifth resistor 112 Sixth resistor 113 Amplifier 114 Comparator 115 Second inverter 116 Second OR circuit 117 Third inverter 118 Seventh resistor 119 Capacitor

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Isao Sato 1-3-1, Kita-Nanajo-Nishi 4-chome, Kita-ku, Sapporo-shi, Hokkaido F-term within Fujitsu Hokkaido Digital Technology Co., Ltd. 5K023 AA07 BB06 BB11 DD08 EE05 NN07 RR08

Claims (4)

[Claims] 1. An apparatus main body, a first microphone provided on the apparatus main body, an open / close cover covering a front surface of the apparatus main body, a second microphone provided on an inner surface side of the open / close cover, and the open / close cover A portable communication device comprising: a switch means for switching a connection circuit between the first microphone and the second microphone when the opening / closing cover is opened / closed at the center of rotation of the portable communication device. 2. An apparatus main body, comprising: a first microphone provided on the apparatus main body; an opening / closing cover covering a front surface of the apparatus main body; and a second microphone provided on an inner surface side of the opening / closing cover. A conductor connection pattern connected to the second microphone is provided on one side of the rotating portion of the opening / closing cover, and a shaft body on the device body side that supports and rotates the opening / closing cover is connected to a circuit in the device body. An elastic contact piece is provided, and the connection pattern and the elastic contact piece are contact-connected at the open position of the opening / closing cover, and the connection pattern and the elastic contact piece are separated at a position where the opening / closing cover is closed. A portable communication device characterized by the following. 3. An apparatus main body, a first microphone provided on the apparatus main body, an open / close cover covering a front surface of the apparatus main body, and a second microphone provided on an inner surface side of the open / close cover, A connecting pattern of a conductor connected to a second microphone is provided on one side of the rotating portion of the opening / closing cover, and a circuit inside the device body is connected to a shaft body on the device body side for supporting and rotating the opening / closing cover. A portable communication device comprising: a resilient contact piece; and a resilient contact piece elastically contacting a circuit pattern of a circuit board in the device body inside the shaft body. 4. Switching between a first microphone provided on the apparatus main body side and a second microphone provided on the open / close cover side is performed by a circuit connection between the main body side and the open / close cover side by opening and closing the open / close cover. A portable communication device comprising: a switching circuit that uses both a signal for detecting presence / absence and a signal for detecting the magnitude of a terminal voltage of the second microphone.