JPH05284049A - Enclosure for portable communication equipment - Google Patents

Abstract

PURPOSE:To surely realize static electricity countermeasures, to make the enclosure compact and thin by improving the mounting efficiency of an electronic circuit board and to easily improve a static electricity entering passage. CONSTITUTION:An opening 25 for exposing one part of a flat antenna 12 is provided in the static electricity entering passage from a void 22 among an enclosure 11, decorative label 13 and front side flat antenna 12, void 23 between the enclosure 11 and a battery holder 14 and void 24 among the enclosure 11, decorative label 19 and back side flat antenna 18 to metallic parts led to a battery 15 or the electronic circuit board. Static electricity entered from the voids 22, 23 and 24 is transmitted from this opening 25 to the flat antenna 12 or 18 and discharged from there to the outside. Since the metallic parts conducted to the battery 15 or the electronic circuit board can be arranged near the outside of the enclosure 11, the mounting efficiency of the electronic circuit board can be improved, and the enclosure 11 can be made compact and thin. Further, since the opening 25 can be easily formed, the static electricity entering passage can be easily improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing of a portable communication device such as a selective call receiver.

[0002]

2. Description of the Related Art Conventionally, a portable communication device of this type has a structure for preventing the internal electronic circuit from being damaged by static electricity. FIG. 5 shows the configurations of the flat antenna and the electronic circuit board in the housing. In FIG. 5, 1 is a front side flat plate antenna, 2 is an electronic circuit board, 3 is a back side flat plate antenna, 4 and 5 are capacitors respectively connected between the electronic circuit board 2 and the flat plate antennas 1 and 3, and 6 Is a conduction terminal that connects the flat antennas 1 and 3.

Static electricity that has entered from the surface of the flat antenna 1 or 3 is blocked by the capacitors 4 and 5 in a direct current manner, and therefore is not transmitted to the electronic circuit board 2 and does not reach the end surface or conduction of the flat antenna 1 or 3. It is discharged to the outside from the end surface of the other plate-shaped antenna 1 or 3 via the terminal 6.
It is also known that a reactance element is used instead of the capacitors 4 and 5, or a structure of the housing is devised to extend the path length of static electricity intrusion to add a reactance component.

FIG. 6 shows a partial cross section of a case of a conventional selective call receiver having such a device. In FIG. 6, 11 is a housing, 12 is a front plate antenna, 13 is a label attached to the entire surface of the front plate antenna 12 to prevent the antenna 12 from being exposed to the external environment as much as possible, and 14 is a decorative label. Battery holder, 15 is battery holder 1
Batteries fitted in 4; 16 is a battery holding metal fitting; 17 is an insulating sheet for electrically insulating from the electric holding metal fitting 16; 18 is a back side flat plate antenna; 19 is an entire surface of the back side flat plate antenna 18 It is a makeup label.

FIG. 7 shows the case 11 turned upside down, and the case 11 is formed in a thin rectangular shape. 20
Is a recess for attaching and detaching the battery holder 14 in which the battery 15 is fitted in the housing 11, and 21 is the battery holder 14
Is a battery terminal for contacting the battery 15 and supplying power to the electronic circuit board when the battery is inserted into the housing 11. FIG. 8 shows the battery holder 14 turned upside down.
Reference numeral 4a is a battery guide for ensuring a path length for static electricity penetration.

In such a housing structure, in order to extend the electrostatic penetration path length and add the reactance component, the position of the battery 15 in the battery holder 14 is arranged sufficiently inside or the battery 15 is arranged. A battery guide 14a is provided in the battery holder 14 so that the exposure of the battery 15 is reduced, or the battery terminals 21 for supplying power to the electronic circuit board are arranged inside the housing 11 with a sufficient extension distance. This prevents static electricity from entering through the gap between the housing 11 and the battery holder 14.

[0007]

However, in the case of the above-mentioned conventional portable communication device, the battery, the battery terminal, and the like must be arranged sufficiently inside the case, so that the mounting efficiency of the electronic circuit board is improved. It is difficult to improve, and since the battery holder is provided with the battery guide, it is difficult to reduce the size and thickness of the housing. Further, since the static electricity invasion route is indispensable to be tested and evaluated by an actual product, there has been a problem that a large-scale improvement measure must be taken to unexpectedly improve the static electricity invasion route.

The present invention solves such a conventional problem, and it is possible to reliably take measures against static electricity, improve the mounting efficiency of an electronic circuit board, and reduce the size and thickness of the electronic circuit board. An object of the present invention is to provide a housing of a portable communication device that can easily improve a path of static electricity intrusion.

[0009]

In order to achieve the above object, the present invention provides a member which has a flat plate-shaped antenna inside and which conducts to an internal electronic circuit from a gap portion with another member exposed to the outside. An opening for exposing a part of the plate-shaped antenna is provided in the static electricity invasion path up to this point.

[0010]

According to the present invention, since the flat antenna is partly exposed in the static electricity path in the housing due to the above structure, the static electricity that has entered through the gap between the housing and other members such as the battery holder and the operation switch. Can be transmitted from this opening to the flat antenna and finally discharged to the outside from the flat antenna, so that a member such as a battery or a metal component that conducts to the electronic circuit is arranged near the outside of the housing. Since the mounting efficiency of the electronic circuit board can be improved and the battery guide of the battery holder is not required,
The housing can be made smaller and thinner, and the shape and number of openings can be changed to easily improve the static electricity intrusion path in the actual test evaluation stage.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the structure of an embodiment of the present invention, and the same reference numerals used in the description of the conventional example are used for the same members. In FIG. 1, 11 is a housing, 12 is a front side flat plate antenna, 13 is a label attached to the entire surface of the front side flat plate antenna 12 to avoid exposing the antenna 12 to the external environment as much as possible, and 14 is a decorative label. Battery holder, 15 is a battery fitted in the battery holder 14, 16
Is a battery holding metal fitting, 17 is an insulating sheet for electrically insulating from the electric holding metal fitting 16, 18 is a back side flat plate antenna, and 19 is a decorative label attached to the entire surface of the back side flat plate antenna 18. 22 is a gap between the casing 11 and the decorative label 13 and the flat plate-shaped antenna 12, 23 is a gap between the casing 11 and the battery holder 14, and 24 is a casing 1.
1 is a gap between the decorative label 19 and the back side flat plate antenna 18. Reference numeral 25 denotes an opening formed in a portion of the housing 11 where the front-side flat plate-shaped antenna 12 is attached, in the path of static electricity penetration from the gap 22 to the battery 15. The position where the opening 25 is provided is from the gaps 22, 23, 24 to the battery 1
5 or the distance to other metal parts that are electrically connected to the electronic circuit.

FIG. 2 (a) shows the case 11 with the back side facing upward. The case 11 is formed in a rectangular shape having a thin structure for attaching and detaching the battery holder 14 in which the battery 15 is fitted. It has a recess 20. A battery terminal 21 for supplying electric power to the electronic circuit board is exposed in the recess 20, and a circular opening for exposing a part of the lower front plate antenna 12 is provided on the entrance side of the recess 20. 25 are formed. This opening 25 allows the battery holder 14 to be recessed 2
When it is inserted into the slot 0, it is hidden by the battery holder 14 and cannot be seen from the outside. The opening 25 is
As shown in FIG. 2B, it may be formed in a slit shape. FIG. 3 is a view of the housing 11 as seen from the side surface.
There is a gap 23 between the battery holder 14 and the battery holder 14.

FIG. 4 shows the relationship between the plate antennas 12 and 18 on the front and back sides and the electronic circuit board. Between the plate antennas 12 and 18 and the electronic circuit 26, capacitors 27 are provided between the plate antennas 12 and 18 and the electronic circuit 26, as in the conventional example. , 28 are connected to each other, and the flat plate-shaped antennas 12 and 18 are connected to each other by a conduction terminal 29. Therefore, the static electricity that has entered from one of the flat plate-shaped antennas 12 or 18 is absorbed by the capacitor 27 or 2.
8 is blocked by the direct current and is not transmitted to the electronic circuit board 26, and is difficult to be transmitted to the electronic circuit board 26 due to other reactance components.
Alternatively, it is transmitted to the end face of 18 or is transmitted to the end face of the other plate-shaped antenna 12 or 18 through the conduction terminal 29, and finally discharged to the outside.

Next, the operation of the above embodiment will be described.
In FIG. 1, static electricity that has entered through the gap 22 is
It is prevented from being transmitted from the opening 25 to the front side flat plate antenna 12 through 2 and the electronic circuit board 26 as described above, and finally discharged from the front side flat plate antenna 12 to the outside. Static electricity that has entered through the gap 23 also
Through the opening 25 to the front side flat plate-shaped antenna 12 and discharged to the outside in the same manner as above. Also, the gap 2
The static electricity that has entered from 4 is transmitted from the gap 24 through the back plate antenna 18 to the front plate antenna 12, and is discharged to the outside in the same manner as above.

As described above, according to the above-described embodiment, the static electricity invasion path from the gaps 22, 23, 24 between the battery holder 14 and the housing 11 to the battery 15 and the metal parts conducting to the electronic circuit board 26. Since the opening 25 for exposing a part of the flat antenna 12 is provided therein, the gaps 22, 23,
It is possible to reliably protect the electronic circuit board 26 from static electricity that enters from 24.

Further, since the metal parts electrically connected to the battery 15 and the electronic circuit board 26 can be arranged near the outside of the housing 11,
The mounting efficiency of the electronic circuit board can be improved, and a small and thin housing can be realized.

Further, since the opening 25 can be easily formed, it is possible to improve the static electricity intrusion path in the actual evaluation test stage in a short time and at low cost.

Furthermore, since the position where the opening 25 is formed is hidden by the insertion of the battery holder 14, the static electricity intrusion path can be improved without affecting the external design.

Furthermore, by arbitrarily selecting the number and shape of the openings 25, it is possible to improve the static electricity intrusion route according to the range of the static electricity intrusion route.

Furthermore, by making the shape of the opening 25 circular, the opening 25 can be easily additionally processed by a drill or the like, so that it is possible to easily improve the static electricity intrusion path later.

[0021]

As is apparent from the above-described embodiments, the present invention has a plate antenna inside and extends from a gap between the plate antenna and another member exposed to the outside to a member conducting to an internal electronic circuit. An opening is provided in the electrostatic discharge path to expose a part of the flat antenna, and the static electricity that has entered from the gap between the housing and other members such as the battery holder and operation switch is opened from this opening. Since it can be transmitted to the flat antenna and finally discharged from the flat antenna, members such as batteries and metal parts that conduct electricity to the electronic circuit can be arranged near the outside of the housing. In addition, the mounting efficiency of the electronic circuit board can be improved, the housing can be made smaller and thinner, and the shape and number of openings can be changed to reduce static electricity in the actual test evaluation stage. Improved air intrusion path can be easily performed.

[Brief description of drawings]

FIG. 1 is a partial sectional view showing a housing of a portable communication device according to an embodiment of the present invention.

FIG. 2A is a perspective view of the same housing and a battery holder. FIG. 2B is a partial perspective view of the same housing.

FIG. 3 is a side view of the same housing.

FIG. 4 is a schematic exploded perspective view showing an internal configuration of the same housing.

FIG. 5 is a schematic exploded perspective view showing an internal configuration of a conventional housing.

FIG. 6 is a partial sectional view of a conventional housing.

FIG. 7 is a perspective view of a conventional housing and a battery holder.

FIG. 8 is a perspective view of a conventional battery holder.

[Explanation of symbols]

 11 Housing 12 Front Side Flat Antenna 13 Decorative Label 14 Battery Holder 15 Battery 16 Battery Holding Metal 17 Insulation Sheet 18 Back Side Flat Antenna 19 Decorative Label 20 Recess 21 Battery Terminal 22, 23, 24 Gap 25 Opening 26 Electronic Circuit Board 27, 28 Capacitor 29 Conductive terminal

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Susumu Otsuki 4-3-1, Tsunashima-higashi, Kohoku-ku, Yokohama-shi, Kanagawa Matsushita Communication Industrial Co., Ltd.

Claims (1)

[Claims] 1. A part of the antenna is provided in a static electricity invasion path from a gap portion with another member exposed to the outside to a member conducting to an internal electronic circuit. A housing for a portable communication device that has an opening for exposing to a static electricity intrusion path.