JPH11331337A - Portable electronic equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of parts and the manhour of an assembly operation, improve workability and also to reduce manufacturing cost. SOLUTION: A holding member 23 which holds one end part 26 of a printed wiring board 25 on which a speaker 30 is mounted has a communication hole 29 that coincides with a sound producing part 31 of the speaker 30 and when the board 25 is held by the member 23, the hole 29 coincides with the sound producing part and the attenuation of sound pressure from the speaker 30 is suppressed by the hole 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable electronic device such as a portable electric bell receiver having a built-in speaker.

[0002]

2. Description of the Related Art A portable electronic device such as a portable electric bell receiver called a pager or a pager has a built-in speaker as a sound transmitting means, and the speaker is provided with a speaker spacer for holding sound pressure.

[0003] A conventional portable telephone bell receiver will be described with reference to Figs.

A portable electric bell receiver 1 includes a flat rectangular frame-shaped loop antenna 2 provided at one end of a printed wiring board 5.
And a strip-shaped antenna spacer 4 which can be fitted into the loop antenna 2 while leaving a part of the hollow portion 3.

A single groove (not shown) is formed on the inner surface of the antenna spacer 4 along the longitudinal direction of the loop antenna 2, and the width of the groove is substantially equal to the thickness of the printed wiring board 5. Are equal.

[0007] A rectangular parallelepiped speaker 7 is mounted on one end 6 of the printed wiring board 5, and the speaker 7 is located in a space left behind the loop antenna 2. The sound generating portion 8 of the speaker 7 is formed on an end face 9, and the end face 9 is flush with the end face of the printed wiring board 5.

A thin speaker spacer 10 is provided in the hollow portion 3 adjacent to the antenna spacer 4, and the thickness of the speaker spacer 10 is thinner in the antenna spacer 4 in which the groove is formed. Of the printed wiring board 5 on which the speaker 7 is mounted.
When the one end 6 is fitted into the groove, the speaker spacer 10 comes into close contact with the end face 9. Furthermore,
The speaker spacer 10 is provided with a sound-passing hole 11 that matches the sound generator 8. An outer surface of the speaker spacer 10 is formed of a material such as a sponge having sound permeability so as to cover the sound-passing hole 11. The dustproof sheet 12 is attached.

The loop antenna 2, the antenna spacer 4, the dustproof sheet 12, and other components are covered by a main body case 13, and a required number of slit-like openings 14 are provided in a portion of the main body case 13 facing the sound holes 11. (Three in the figure).

When assembling the portable bell receiver 1,
The antenna spacer 4 is fitted in the hollow portion 3 of the loop antenna 2, and one end 6 of the printed wiring board 5 on which the speaker 7 is mounted is fitted in the groove of the antenna spacer 4. After that, the speaker spacer 10 having the dustproof sheet 12 adhered to the outer surface is aligned so that the sound hole 11 coincides with the sound generator 8, and is closely attached to the end face 9 of the speaker 7.

The sound emitted from the sound generator 8 of the speaker 7 is collected in the sound hole 11 of the speaker spacer 10, the attenuation of sound pressure is suppressed, and the sound hole 11, dustproof sheet 12, opening 14 Is pronounced to the outside. Further, the dustproof sheet 12 prevents foreign matter such as dust from entering the speaker 7 from the opening 14.

[0011]

In the above-mentioned conventional portable electronic device, it is necessary to separately provide the speaker spacer 10 in order to hold the sound pressure from the speaker 7,
In addition to the increase in the number of parts, a step of aligning the speaker spacer 10 so that the sound hole 11 matches the sound generator 8 is required at the time of assembling the equipment, and the number of assembly steps is increased. Therefore, it has not been possible to improve the workability and it has been difficult to reduce the manufacturing cost.

The present invention has been made in view of the above circumstances, and aims to reduce the number of parts and the number of man-hours for assembling work, thereby improving workability and reducing manufacturing costs.

[0013]

SUMMARY OF THE INVENTION The present invention relates to a portable electronic device in which a holding member for holding one end of a printed wiring board on which a speaker is mounted has a sound hole that matches a sounding portion of the speaker. When the printed wiring board is held by the loudspeaker, the sound holes match the sounding portion, and the sound holes suppress attenuation of sound pressure from the speaker.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

The portable bell receiver 21 is a printed circuit board 2
5 has a flat rectangular frame-shaped loop antenna 22 provided at one end, and a strip-shaped antenna spacer 23 fitted inside the loop antenna 22.

A single groove 24 is formed on the inner surface of the antenna spacer 23 along the longitudinal direction of the loop antenna 22, and the width of the groove 24 is substantially equal to the thickness of the printed wiring board 25. I have. A recess 27 having a width substantially equal to the width of a speaker 30 described later and having the same depth as the groove 24 is formed on the inner surface side of the antenna spacer 23 so as to reach the groove 24 from a side surface of the antenna spacer 23. A rectangular sound hole 29 is formed in the thin portion 28 of the recess 27.
Are drilled.

A rectangular parallelepiped speaker 30 is mounted on one end 26 of the printed wiring board 25.
The zero sounding portion 31 is formed on an end face 32, which is flush with the end face of the one end 26. When the printed wiring board 25 on which the speaker 30 is mounted fits into the groove 24, the speaker 30 fits into the concave portion 27 and comes into close contact with the thin portion 28, and the sounding portion 31 of the speaker 30 and the sound transmission portion 31 The holes 29 match.

A dustproof sheet 33 made of a material such as a sponge having sound permeability is attached to the outer surface of the antenna spacer 23 so as to cover the sound hole 29.

The components such as the loop antenna 22, the antenna spacer 23, and the dustproof sheet 33 are covered by a main body case 34, and a rectangular opening 35 is formed in a portion of the main body case 34 facing the sound passage hole 29. ing.

When assembling the portable bell receiver 21, the antenna spacer 2 is attached to the loop antenna 22.
Then, the printed wiring board 25 is fitted into the groove 24 in a direction in which the speaker 30 fits into the recess 27.

The sound hole 29 is provided in the antenna spacer 2.
3, the antenna spacer 23 is positioned by being fitted inside the loop antenna 22, and the sound generating portion 31 is positioned by fitting the printed wiring board 25 into the groove 24. . Therefore, the sound hole 29 and the sounding portion 31 are accurately and surely matched, and the antenna spacer 23 and the speaker 30 are in close contact with each other.

Accordingly, the sound emitted from the sound generator 31 of the speaker 30 passes through the sound hole 29 and is diffused to the outside through the sound hole 29, the dustproof sheet 33, and the opening 35 without being diffused. You.

In the above embodiment, the printed wiring board 25 is inserted into the groove 24 of the antenna spacer 23.
Of the printed wiring board 25 is held by the antenna spacer 23, and the holding member of the printed wiring board 25 is the antenna spacer 2.
It is not limited to three.

It is needless to say that the present invention can be applied not only to the portable electric bell receiver but also to other portable electronic devices.

[0025]

As described above, according to the present invention, the sound pressure from the loudspeaker is held by the sound holes integrated with the holding member, so that the antenna spacer is provided separately from the holding member. There is no need, and the number of parts can be reduced. Also, by holding the substrate on the holding member, since the sound holes match the sounding portion, the operation of matching the sound holes with the sounding portion can be omitted, which facilitates the assembling work and reduces the assembly work. It exhibits various excellent effects such as improved accuracy.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a view taken along the line AA in FIG. 1;

FIG. 3 is an exploded perspective view showing the embodiment.

FIG. 4 is an exploded perspective view showing a conventional example.

FIG. 5 is a view taken in the direction of arrows BB in FIG. 4;

FIG. 6 is an exploded perspective view showing the conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Portable telephone bell receiver 23 Antenna spacer 25 Printed wiring board 29 Sound hole 30 Speaker 31 Sound generator

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Manabu Miyayama 3-14-20 Higashinakano, Nakano-ku, Tokyo Inside Kokusai Electric Corporation

Claims (1)

[Claims] 1. A portable electronic device, wherein a holding member for holding one end of a printed wiring board on which a speaker is mounted has a sound hole that matches a sounding portion of the speaker.