JP4804434B2 - Mobile terminal device - Google Patents

Description

  The present invention relates to a mobile terminal device, and more particularly to a mobile terminal device that saves space in a microphone mounting structure.

  Conventionally, in a foldable mobile phone, a first casing having a liquid crystal display and a second casing having a plurality of operation keys are connected to each other via a hinge mechanism so as to be opened and closed. The hinge mechanism can open the first housing and the second housing to an opening angle close to approximately 180 degrees during a call or when using the mail function. The surfaces of the casing and the second casing can be brought into contact with each other and folded into two.

  A conventional example of such a foldable mobile phone is described in, for example, the following Patent Document 1 (Japanese Patent Laid-Open No. 2003-8708). This mobile phone is provided with operation keys such as a numeric keypad, a power key, and various operation keys on the operation surface. The operation key is partly formed on a rubber member made of an elastic material. These operation keys are exposed to the outside through an opening formed in advance in a front case constituting the casing. A printed circuit board provided with a switch corresponding to each of the lower surfaces of these operation keys is accommodated in a rear case constituting the casing.

Further, a microphone hole for a transmitter is provided in the casing below the key operation surface, and a microphone is disposed corresponding to the lower surface of the transmitter. The microphone is fixed by providing a rib on the back of the housing and press-fitting the microphone module. Then, the user operates the cellular phone by pressing the operation key exposed from the opening of the operation surface and operating the switch. In addition, sound is input into a microphone through a through hole formed in the housing and processed in the mobile phone.
JP 2003-8708 A (paragraph [0035] to paragraph [0036], paragraph [0040] to paragraph [0042], FIGS. 1 and 2)

  By the way, in addition to the foldable mobile phone which has been mainstream until now, recently, a bar-shaped straight type and a slide-type mobile phone are also becoming popular. In particular, mobile phones that place emphasis on design in addition to hardware miniaturization and weight reduction have attracted attention, and various types of mobile phones have been proposed.

  However, for example, in a straight type portable terminal device, there is a limit to increasing the surface area of the housing in order to reduce the size of the device itself. Therefore, the operation surface cannot be made sufficiently large. In particular, in the microphone mounting structure disclosed in Patent Document 1, it is necessary to consider the space for arranging the microphone on the same surface as the operation surface of the housing, so the button area and design of the operation surface are greatly limited. Will be. Therefore, there has been a problem that a plurality of operation keys cannot be provided on the operation surface with a size and design that allows easy operation. The above problem is extremely important when the portable terminal device is small and requires a large number of operation keys.

  Accordingly, the inventors of the present application have made various studies to solve the above-described problems, and as a result, it is conceived that the above-described problems can be solved if the microphone is arranged on the lower surface (back side) of the operation key. However, the present invention has been completed. That is, the present invention has an object to solve the above problems, and a microphone is disposed on the back side of the operation key button, and a microphone hole is provided in the gap between the button of the operation key and the button. An object of the present invention is to provide a portable terminal device having an operation surface having operation key buttons of a size.

  In order to solve the above-mentioned problem, in the invention according to claim 1 of the present application, at least a key panel forming an operation surface on which operation key buttons are arranged is arranged on a key substrate on which switches corresponding to the operation key buttons are arranged. A portable terminal device provided, comprising a microphone disposed on the key board between the adjacent switches on the back side of the operation surface, and collecting sound toward the microphone on the key panel A microphone through-hole is provided for this purpose.

  Further, according to a second aspect of the present invention, in the portable terminal device according to the first aspect, a groove indicating the division of the operation key button is formed on the surface of the key panel, and the through hole for the microphone is the groove. It is characterized by being formed.

  According to a third aspect of the present invention, in the portable terminal device according to the second aspect, the microphone is disposed corresponding to a position where the groove intersects, and the microphone through hole is formed at the intersection of the groove. It is characterized by being.

  The present invention achieves the following excellent effects by the above-described solving means. That is, according to the first aspect of the present invention, at least the operation key button is arranged on the back side of the operation surface, and the switch corresponding to the operation key button is generated between the adjacent switches on the arranged key board. A microphone is disposed in the gap, and a microphone through-hole for introducing sound toward the microphone is opened in a key panel forming an operation surface.

  According to such a configuration, the microphone is arranged in the gap generated between the switches on the key board, and there is no need to provide a space for providing a microphone hole in the casing. Can be spread. Accordingly, it is possible to provide a mobile terminal device with improved operability. Further, since the member can be omitted without occupying the area of the main board or the like for arranging the microphone, the main board can be downsized, and the mobile terminal device can be downsized.

  According to the invention of claim 2 of the present application, in the mobile terminal device of claim 1, the key panel surface is formed with a groove indicating the division of the operation key button, and the microphone through hole is formed in the groove. Has been.

  According to such a configuration, the deformation state of the surface of the pressed operation key button does not affect the adjacent operation key button due to the groove, and the adjacent operation key button is inadvertently deformed to cause a malfunction. There is no. In particular, it is suitable when the operation surface is narrow and the operation key buttons are close to each other. In addition, since the microphone through hole for collecting sound is located in the groove between the operation key button and the operation key button, it is not necessary to provide a microphone hole in the housing, and it is preferable in terms of aesthetics, so it has excellent design. .

  According to the invention of claim 3 of the present application, in the portable terminal device of claim 2, the microphone is disposed corresponding to the position where the groove intersects, and the microphone through hole is formed at the intersection of the groove. Yes.

  According to such a configuration, since the microphone is disposed in the gap that is generated most greatly between adjacent switches, the surface of the key substrate can be efficiently used by effectively using the gap. The effect is particularly remarkable when applied to a small portable terminal device.

  Hereinafter, specific examples of the present invention will be described in detail with reference to examples and drawings. However, the embodiment described below exemplifies a mobile phone as an embodiment for embodying the technical idea of the present invention, and is intended to specify the present invention for this mobile phone. The present invention is equally applicable to other embodiments included in the scope of claims.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view showing a mobile phone in the embodiment, FIG. 2 is an exploded perspective view showing the mobile phone in FIG. 1, FIG. 3 is an exploded perspective view showing the key panel in FIG. 2, and FIG. FIG. 5 is a sectional view taken along line BB in FIG.

  In the state of the plan view shown in FIG. 1, the mobile phone 1 includes a rectangular cabinet 10 having a thin thickness, an operation unit 20 provided in a lower part of the cabinet 10, and a display unit 30 provided in an upper part of the cabinet 10. It consists of and.

  As shown in FIGS. 2 and 3, the operation unit 20 includes a key panel 202 having operation key buttons 201 such as a numeric keypad, a reception key, and a transmission key arranged on the surface, and a key substrate 203 positioned below the key panel 202. It is composed of The plurality of operation key buttons 201 are arranged in a plurality of rows and columns.

  As shown in FIG. 2, the cabinet 10 is formed in a box shape having one surface as an opening. A chassis 40 attached to the cabinet 10 from the upper surface is formed. A display unit 30 is attached to the upper surface of the upper half of the chassis 40. An operation unit 20 is attached to the upper surface of the lower half of the chassis 40. Further, as shown in FIGS. 4 and 5, a main circuit board 50 is attached to the lower surface of the lower half of the chassis 40.

  The key panel 202 is curved so that the central portion of the surface bulges out. The key panel 202 is formed of a plurality of layers as shown in FIG. The configuration includes a key top 204 having a bulged central portion disposed on the surface, a rubber sheet reinforcing plate 205 disposed on the lower surface thereof, and a flat rubber sheet 206 disposed on the lowermost surface.

  The key top 204 is made of, for example, a polycarbonate resin material, and the operation key buttons 201 are divided by grooves 207 formed vertically and horizontally in a straight line. Yes. The rubber sheet reinforcing plate 205 is made of, for example, a polycarbonate resin material. In addition, a fitting groove 210 into which the frame 208 is fitted is formed on the lower surface of the key top 204. The rubber sheet 206 is made of, for example, silicon rubber, and a protruding portion 211 is formed on the lower surface at a position corresponding to a switch described later. Further, a notch 213 is formed by notching a position corresponding to the microphone 60 disposed on the key substrate 203.

  A switch 212 corresponding to the operation key button 201 is disposed on the key board 203. These switches 212 are configured as metal dome switches and have a thin plate shape as a whole. On the key board 203, a small microphone 60 such as a silicon microphone is disposed in a gap generated between four adjacent switches 212.

  The key panel 202 is fixed to the chassis 40 by a fixing portion 70. The fixing portion 70 includes a protruding piece 701 provided to protrude downward from four positions on the edge of the rubber sheet reinforcing plate 205 constituting the key panel 202, a through hole 703 through which a screw 702 formed on the protruding piece 701 passes. The screw hole 704 is formed in the side wall of the chassis 50. Here, the screw hole 704 is formed at a position corresponding to the through hole 703. On the other hand, the screw 702 inserted into the through hole 703 is screwed into the screw hole 704. Here, the key top 204 is attached to the rubber sheet reinforcing plate 205 in advance.

  In the key panel 202, a microphone through hole 601 for collecting sound toward the microphone 60 is formed at a position where the groove 207 intersects on the upper surface of the microphone 60.

  Further, a battery storage portion is formed on the back side of the main circuit board 40 so as to store the battery 80.

  Next, assembly of the cellular phone 1 having the configuration of the above-described embodiment will be described with reference to FIGS.

  First, the display unit 30 is attached to the upper surface of the upper half of the chassis 40, and the key substrate 203 on which the microphone 60 is disposed is attached to the upper surface of the lower half. The main circuit board 50 is attached to the lower surface of the lower half of the chassis 40.

  Next, the key panel 202 is pressed in the direction of the chassis 40 so that the protruding piece 701 is along the side wall of the chassis 40, and is positioned so that the through hole 703 coincides with the screw hole 704. Thereafter, a screw 702 is inserted into the through hole 703 and screwed into the screw hole 704, and screwing is performed so that the key panel 202 is fixed to the chassis 40.

  Then, the chassis 40 to which the operation unit 20, the display unit 30 and the like are attached is fitted from the upper surface of the cabinet 10 and fixed to the cabinet 10 by screws or the like. In this way, the key panel 202 is incorporated into the cabinet 10 to complete the assembly of the mobile phone 1.

  Therefore, the mobile phone 1 according to the embodiment of the present invention described above is operated by the operation unit 20 and the operation state is displayed on the display unit 30.

  The operation unit 20 is operated by selecting and pressing a desired one from a plurality of operation key buttons 201 on the key panel 202. The pressed operation key button 201 bends the key top 204 in the frame 208 and presses the rubber sheet 206 facing the notch 209. This pressing force is transmitted to the protrusion 211 and displaces it to the lower layer. This displacement activates the switch 212 on the key board 203. That is, the switch 212 corresponding to the pressed operation key button 201 is operated via the rubber sheet 206.

  Here, distortion (deformed state) due to pressing of the key top 204 constituting the key panel 202 is blocked by the fitting groove 210 in which the frame 208 is fitted so as not to affect the key top 204 portion of the adjacent operation key button 201. The Therefore, the key top 204 portion of the adjacent operation key button 201 is not deformed. Therefore, on the key panel 202, the switch 208 corresponding to the operation key button 201 adjacent to the pressed operation key button 201 is not operated. Further, the groove 207 formed on the boundary of the operation key button 201 also has the above-described blocking effect.

  The microphone 60 disposed on the key substrate 203 collects the sound in front of the mobile phone 1 through the microphone through hole 601 formed at the intersection of the grooves 207.

  According to the above-described embodiment of the present invention, since the microphone 60 is arranged in the gap formed between the switches 212 in the key substrate 203, the key substrate 203 is used effectively. Therefore, since the location where the microphone 60 is disposed in the cabinet 10 is not required, the operation surface can be made large on the surface of the cabinet 10. Therefore, the operability of the mobile phone 1 is improved.

  In addition, the cellular phone 1 is preferable in terms of aesthetics since the microphone through hole 601 for collecting the microphone 60 is provided in the groove 207.

  Further, the groove 207 indicating the boundary line of the operation key button 201 not only shows the display of the boundary line, but also blocks the distortion of the pressed operation key button 201 from being transmitted to the adjacent operation key button 201. Prevents malfunction.

  In the embodiment of the present invention, the microphone through hole 601 is formed at a position where the groove 207 intersects, but may be formed in a groove 207 other than the position where the microphone 207 intersects. Further, it may be formed at a place other than the groove 207.

It is a top view which shows the mobile telephone concerning the Example of this invention. It is a perspective view which decomposes | disassembles and shows the mobile telephone in FIG. It is the perspective view which decomposed | disassembled and showed the key panel in FIG. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cellular phone 10 Cabinet 20 Operation part 30 Display part 40 Chassis 50 Main circuit board 60 Microphone 70 Mounting part 201 Operation key button 202 Key panel 203 Key board 204 Key top 205 Rubber sheet reinforcement board 206 Rubber sheet 207 Groove 208 Frame 209 Notch Part 210 Fitting groove 211 Protruding part 212 Switch 213 Notch part 601 Microphone through hole 701 Protruding piece 702 Screw 703 Through hole 704 Screw hole

Claims (3)

A portable terminal device in which a key panel forming an operation surface on which at least operation key buttons are arranged is provided on a key board on which switches corresponding to the operation key buttons are arranged,
A microphone disposed on the back side of the operation surface between the adjacent switches on the key board;
A portable terminal device, wherein a microphone through-hole for collecting sound toward the microphone is formed in the key panel.   The portable terminal device according to claim 1, wherein a groove indicating a division of the operation key button is formed on a surface of the key panel, and the microphone through hole is formed in the groove.   The portable terminal device according to claim 2, wherein the microphone is arranged corresponding to a position where the groove intersects, and the microphone through hole is formed at an intersection of the groove.

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