Portable wireless device

The present invention relates to a device having a push button structure, particularly a portable radio having a push button structure.

First, the structure of the conventional portable radio will be described with reference to FIGS. 4 to 6. Note that FIG. 5 shows a view taken along the line CC of FIG. 4 (B), and FIG. 6 shows a view taken along the line DD of FIG. 4 (B).

The case 4 of the portable radio 3 is assembled by the front cover 1 and the chassis 11, and the portable radio 3 is assembled by attaching the battery pack 2 to the case 4.

A display unit (not shown) such as an LCD (Liquid Crystal Display) and an input unit (not shown) such as a numeric keypad are provided on the front surface of the front cover 1, and a PTT (not shown) used at the time of transmission is provided on the side surface. A Push to Talk) button 5 and a guide button 6 used for setting equipment are provided, and the PTT button 5 and the guide button 6 are molded by a hard resin such as polyamide or an elastomer such as silicone rubber. ..

The PTT button 5 and the guide button 6 are provided on the button cover 7, respectively. The button cover 7 is welded to the outer side surface of the front cover 1 by melting the preformed welding protrusions by ultrasonic waves. The PTT button 5 and the guide button 6 are attached to the front cover 1 via the button cover 7. The PTT button 5 and the guide button 6 each have pressing portions 8 and 9 extending to the inside of the front cover 1.

Further, inside the case 4, the chassis 11 manufactured by die casting is fixed to the front cover 1 with screws or the like, and the waterproof packing 12 is interposed between the front cover 1 and the chassis 11 in a compressed state. ing.

A predetermined number of holes 13 are formed at predetermined positions on the side surface of the chassis 11, and a switch packing 14 is attached to the chassis 11 so as to cover the holes 13. A lateral protrusion 15 is formed in an annular shape on the peripheral edge of the hole 13 in the chassis 11, and a concentric annular groove 10 is formed around the protrusion 15 and around the switch packing 14. An annular seal portion 16 is formed, and a pressing portion 17 is integrally formed at the center of the seal portion 16. The seal portion 16 is press-fitted into the recessed groove 10, and the pressing portion 17 is inserted into the hole 13, whereby the switch packing 14 is attached to the chassis 11, and the seal portion 16 is inserted into the recessed groove 10. Waterproofness is ensured by being press-fitted into. At this time, the tips of the pressing portions 8 and 9 are in contact with the exposed surface of the switch packing 14 to the outside, that is, the portion facing the pressing portion 17.

Further, in the case 4, an inter-board shield case 21 is provided between the LCD substrate 18 and the RF (Radio Frequency) substrate 19. A flexible printed circuit board (FPC) 22 is fixed to the inter-board shield case 21 with double-sided tape, a switch 24 is mounted on the FPC 22, and the switch 24 is in contact with the tip of the pressing portion 17.

Further, the FPC 22 is connected to a connector (not shown) mounted on the LCD board 18, and the LCD board 18 and the RF board 19 are connected via a connector, and the LCD board 18 and the RF board 19 are connected. The inter-board shield case 21 is fixed to the chassis 11 with screws or the like.

In the portable radio 3, for example, when the PTT button 5 is pressed, the pressing portion 8 presses the switch packing 14, and the switch 24 is pressed via the switch packing 14, and the switch is pressed. 24 works.

When the PTT button 5 is released, the pressing portion 8 is pushed back by the repulsive force of the switch 24 and the repulsive force of the switch packing 14, the position of the PTT button 5 is returned to the original position, and the operation of the switch 24 is performed. Is released. The case of the guide button 6 is the same as that of the PTT button 5. Further, an elastic member such as a cushion may be interposed between the PTT button 5 and the guide button 6 and the front cover 1 to increase the repulsive force against the PTT button 5 and the guide button 6.

However, in the case of the conventional portable radio 3, since there are many components from the PTT button 5 or the guide button 6 to the switch 24, the center position of the pressing portion 17 and the switch are due to variations in assembly. The center position of the 24 may be displaced, and the operation feeling may be deteriorated. Further, if the accuracy of the parts is increased so that the center positions of the pressing portion 17 and the switch 24 match, there is a problem that the yield of the parts deteriorates and the cost of the parts increases.

Further, in the conventional portable radio device 3, since the button cover 7 is welded to the front cover 1 by ultrasonic welding, it becomes difficult to apply pressure uniformly when the front cover 1 has many curved surfaces. There was a possibility that the welding strength would vary.

<p><patcit num="1"><text>JP-A-2002-271047</text></patcit></p>

<p num="0015"> In view of such circumstances, the present invention provides a portable radio device that reduces the number of parts while ensuring waterproofness, improves assemblability, and reduces costs.</p>

<p num="0016"> The present invention is a portable radio in which a case is assembled by a front cover and a chassis, and a wiring board on which a switch is mounted is provided on the chassis, and a push extending into the case is provided on the outer side surface of the front cover. The present invention relates to a portable radio in which a button of an elastic body having a portion is watertightly attached and the pressing portion abuts or substantially abuts on the switch.</p>

<p num="0017"> According to the present invention, it is a portable radio device in which a case is assembled by a front cover and a chassis, and a wiring board on which a switch is mounted is provided on the chassis, and extends inside the case on the outer side surface of the front cover. Since the elastic button having the pressing portion is watertightly attached and the pressing portion abuts or substantially abuts on the switch, the number of parts is reduced while ensuring waterproofness, and the cost is reduced. Since the button has a structure in which it comes into direct contact with the switch, the positions of the button and the switch are close to each other, and the button can apply a uniform pressure to the switch. It exerts an excellent effect of being able to prevent defects and deterioration of operability.</p>

<figref num="1">The portable radio according to the present invention, (A) shows a left side view of the portable radio, and (B) shows a front view of the portable radio.</figref><figref num="2">It is the AA arrow view of FIG. 1 (B).</figref><figref num="3">It is a BB arrow view of FIG. 1 (B).</figref><figref num="4">It is a conventional portable radio, (A) shows a left side view of the portable radio, and (B) shows a front view of the portable radio.</figref><figref num="5">FIG. 4 (B) is a view taken along the line CC of FIG. 4 (B).</figref><figref num="6">FIG. 4 (B) is a view taken along the line DD.</figref>

Hereinafter, examples of the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, the structure of the portable radio according to the embodiment of the present invention will be described. Note that FIG. 2 shows an arrow view taken along the line AA of FIG. 1 (B), and FIG. 3 shows a view taken along the arrow BB of FIG. 1 (B).

As shown in FIG. 1, the portable radio 33 is assembled by attaching the battery pack 32 to the case 34. Further, the case 34 is assembled by a box-shaped front cover 31 having an open side and a box-shaped chassis 30 (described later) having an open side. A display unit (not shown) and an input unit (not shown) are provided on the front surface of the front cover 31, and a PTT button 35 and a guide button unit 36 formed of an elastomer such as silicon rubber are provided on the side surface. Has been done.

In FIG. 2, the structure of the PTT button 35 and its surroundings will be described. The PTT button 35 has a substantially rectangular outer shape, and a concave groove 38 is formed along the outer edge so that an operation portion is formed on the outer surface and a wall thickness portion 37 is formed on the inner surface, and the wall thickness is further formed. A pressing portion 39 protruding from the portion 37 is formed, and the tip of the pressing portion 39 faces the PTT switch 53 described later.

A PTT button mounting recess 43 into which the PTT button 35 can be fitted is recessed on the side surface of the front cover 31, and a through hole 44 is formed in the PTT button mounting recess 43. When the PTT button 35 is fitted into the PTT button mounting recess 43, the pressing portion 39 inserts the through hole 44 and projects into the front cover 31. The PTT button The PTT button 35 is fixed to the front cover 31 by fixing the outer edge portion of the inner surface of the 35 and the outer edge portion of the PTT button mounting recess 43 with double-sided tape.

Further, a rectangular groove 48 is engraved over the entire circumference of the upper surface, the lower surface, and both side surfaces of the box-shaped chassis 30 having one open surface, and the waterproof packing 49 is fitted in the groove 48. A part of the waterproof packing 49 protrudes from the groove 48.

An LCD board 51 and an RF board 52, which are wiring boards, are attached to the chassis 30 with screws or the like, and a PTT switch 53 is mounted on the LCD board 51 at a position facing the pressing portion 39.

The case 34 is assembled by fitting the chassis 30 from the opening side of the front cover 31 and then fixing the chassis 30 with screws or the like. When the case 34 is assembled, the pressing portion 39 The tip surface and the PTT switch 53 face each other in a state of contact or substantially contact.

At this time, the waterproof packing 49 is compressed by the bottom of the groove 48 and the inner peripheral surface of the front cover 31, so that the waterproof property between the front cover 31 and the chassis 30 is ensured and the PTT is achieved. By adhering the outer edge portion of the inner surface of the button 35 and the outer edge portion of the PTT button mounting recess 43 with double-sided tape, waterproofness between the PTT button 35 and the through hole 44 is ensured, and the waterproofness between the PTT button 35 and the through hole 44 is ensured. The ingress of water is prevented.

In FIG. 3, the structure of the guide button portion 36 and its surroundings will be described. The guide button portion 36 has disc-shaped guide buttons 36a, 36b, 36c (see FIG. 1) which are operation portions projecting from the front cover 31 to the outer surface. Further, in the guide button portion 36, disk-shaped thick portions 41a to 41c (thick portions 41a and 41c are not shown) are independently formed on the inner surfaces of the guide buttons 36a to 36c, respectively, and the guide button portions 36 are formed. Pressing portions 42a to 42c (pressing portions 42a and 42c are not shown) are formed so as to protrude inward from the center of the thick portions 41a to 41c.

Further, on the side surface of the front cover 31, a guide button portion mounting recess 45 into which the guide button portion 36 can be fitted is recessed. The guide button portion mounting recess 45 is further located at a position facing the thick portions 41a to 41c, and has a disk-shaped thick portion storage recess 46a to 46c (thickness) having a diameter larger than that of the thick portions 41a to 41c. Part storage recesses 46a and 46c are not shown), and through holes 47a to 47c (through holes 47a and 47c are not shown) are formed in the center of the thick part storage recesses 46a to 46c. Has been done. When the guide button portion 36 is fitted into the guide button portion mounting recess 45, the pressing portions 42a to 42c insert through the through holes 47a to 47c and project into the front cover 31. It has become. The guide button portion 36 is fixed to the front cover 31 by fixing the outer edge portion of the inner surface of the guide button portion 36 and the outer edge portion of the guide button portion mounting recess 45 with double-sided tape.

The depth of the thick portion storage recesses 46a to 46c is deeper than the protruding length of the thick portions 41a to 41c, and the bottom surface of the thick portion storage recesses 46a to 46c and the thick portion 41a A gap is formed between the tip and the tip of ~ 41c.

Further, guide switches 54a to 54c (guide switches 54a and 54c are not shown) are mounted on the LCD board 51 at positions facing the pressing portions 42a to 42c, respectively, and when the case 34 is assembled. The tip surfaces of the pressing portions 42a to 42c and the guide switches 54a to 54c face each other in a state of contact or substantially contact with each other.

At this time, the waterproof packing 49 ensures waterproofness between the front cover 31 and the chassis 30, and both sides of the outer edge portion of the inner surface of the guide button portion 36 and the outer edge portion of the guide button portion mounting recess 45 are both sides. By being adhered with tape, waterproofness between the guide button portion 36 and the through holes 47a to 47c is ensured, and water is prevented from entering the case 34.

In the portable radio 33, for example, when the PTT button 35 is pressed, the peripheral portion of the thick portion 37 of the PTT button 35 is increased by the difference in height between the inner surface of the PTT button 35 and the thick portion 37. The PTT switch 53 is pressed by the pressing portion 39 while being elastically deformed toward the front cover 31, and the PTT switch 53 operates.

When the PTT button 35 is released, the PTT button 35 returns to the original position due to the repulsive force, the PTT switch 53 also returns to the original position due to the repulsive force, and the operation of the PTT switch 53 is released.

Similar to the PTT switch 53, when the guide switches 54a to 54c are pressed, the peripheral portions of the thick portions 41a to 41c are formed by the gap between the thick portions 41a to 41c and the thick portion storage recesses 46a to 46c. Is pressed toward the front cover 31 while being elastically deformed, and the pressing portions 42a to 42c press the guide switches 54a to 54c.

Since the thick portions 41a to 41c and the thick portion storage recesses 46a to 46c are formed independently of each other, for example, when the guide button 36b is pressed, the guide buttons 36a and 36c are formed. The peripheral portions are interlocked and elastically deformed to prevent the guide switches 54a and 54c from being pressed.

Further, in the above, the chassis 30 and the front cover 31 are assembled in a state where the PTT button 35 and the guide button portion 36 are attached to the front cover 31 in advance. First, the chassis 30 and the front are assembled. After assembling the cover 31, aligning the positions of the PTT switch 53 and the through hole 44, and aligning the positions of the guide switches 54a to 54c and the through hole 47a to 47c, the PTT button 35 and the guide button Needless to say, the portion 36 may be attached to the front cover 31.

As described above, in the present embodiment, the PTT button 35 having the pressing portion 39 formed on the inner surface is attached from the outer surface of the front cover 31, and the guide button has the pressing portions 42a to 42c formed on the inner surface. The structure is such that the portion 36 is attached from the outer surface of the front cover 31, and the PTT button 35 or the guide button portion 36 directly presses the PTT switch 53 or the guide switches 54a to 54c. It is not necessary to interpose a separate member such as a switch packing, and a button cover is not required, and the cost can be reduced by reducing the number of parts.

In addition, by reducing the number of parts, it becomes easier to align the center position of the button and the switch, and ultrasonic welding is not required when attaching the button to the front cover, improving the assembleability of the portable radio. be able to.

Further, since the PTT button 35 and the guide button portion 36 are made of elastomer, the PTT button 35 and the guide button portion 36 itself can be made elastic, and a cushion or the like can be provided between the button and the switch. There is no need to provide an elastic member separately.

Further, in this embodiment, since the PTT switch 53 and the guide switches 54a to 54c are directly mounted on the LCD board 51, the FPC in the conventional portable radio or the FPC and the LCD board are connected to each other. No connectors are required, the number of parts can be further reduced, and the cost can be reduced.

In this embodiment, the PTT button 35 and the guide button portion 36 are molded by the elastomer alone, but the elastomer and a hard resin having high hardness such as polyamide may be molded in two colors. For example, the guide buttons 36a to 36c of the guide button portion 36 are made of hard resin, the other parts are made of elastomer, and only the part touched by the operator is made of hard resin, as in the conventional case. It is possible to exert the same effect as that of this embodiment while obtaining the operation feeling of.

(Additional note) The present invention also includes the following embodiments.

(Appendix 1) A portable radio in which a case is assembled by a front cover and a chassis. A wiring board on which a switch is mounted is provided on the chassis, and a push extending into the case is provided on the outer side surface of the front cover. A portable radio device in which a button of an elastic body having a portion is watertightly attached, and the pressing portion abuts or substantially abuts on the switch.

(Appendix 2) The button is a portable radio of Appendix 1 molded by two-color molding so that the operation portion is made of hard resin and the other parts are made of elastomer.

(Appendix 3) The button is the portable radio of Appendix 1 attached to the side surface of the front cover with double-sided tape.

(Appendix 4) The portable radio according to Appendix 1 in which a waterproof packing is provided over the entire circumference of the chassis and the waterproof packing is interposed between the front cover and the chassis.

30 chassis 31 Front cover 32 Battery pack 33 portable radio 34 cases 35 PTT button 36 Guide button part 39 Pressing part 42 Pressing part 44 through hole 47 through hole 51 LCD board 52 RF board 53 PTT switch 54 Guide switch