JPS60245196A - Radio wave device for portable - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a portable radio device, and particularly to a mounting structure for a printed wiring board or the like.

Structure of a conventional example and its problems In a conventional portable wireless device, as shown in FIGS. 1 and 2, a housing 1 is composed of a housing body 2 and a battery cover 3. The printed wiring board 4 is fixed to the housing 1 by attaching a nut plate 6 to the printed wiring board 4 housed in the housing 1 and screwing screws 7 into the nut plate 6 through holes 6 formed in the housing 1. . In this conventional portable radio device, since the head 7a of the metal screw 7 is exposed outside the casing 1, strong voltage such as static electricity is applied to the sieve 1 from the screw 7. There was a risk that the liquid would flow onto the housed printed wiring board 4, causing the device to malfunction and lowering its reliability, as well as damaging the electrical components 8 provided on the printed wiring board 4. In order to eliminate such drawbacks, some screws 7 have their heads 7a made of electrically insulating synthetic resin. However, the printed wiring board 4 is often attached to or removed from the housing 1 for maintenance and adjustment of the electrical components 8 on the printed wiring board 4, and by repeatedly attaching and detaching the screws 7 and firmly tightening them, The head of the synthetic resin screw may be destroyed.

Purpose of the Invention The purpose of the present invention is to eliminate the drawbacks of the above-mentioned conventional examples, and to strengthen the electrical components built into the device so that even if a strong voltage such as static electricity is applied from outside the device, it will not easily flow into the device. It is an object of the present invention to provide a portable wireless device that can be protected from voltage and the like, and that allows a printed wiring board to be easily attached to or removed from the housing of the device.

Structure of the Invention In order to achieve the above object, the present invention provides a system in which a printed wiring board housed in a synthetic resin housing can be detached directly or indirectly from the housing by engaging synthetic resin protrusions and holes. It is characterized by being fixed at .

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail based on the drawings. As shown in FIGS. 3 and 4, the casing 11 is composed of a casing body 12 made of an electrically insulating material made of synthetic resin and a battery cover 13. The housing body 12 is formed into a flat shape, and has wide side plates 1 on the long side and short side of the top plate 14, respectively.
5 and 16 are connected to narrow side plates 17 and 18, and an opening 19 is formed on the lower side. An elongated hole 2o is formed in the center of each side plate 15, 16 near the opening 19, and four rectangular parts 21 are formed around the outside of each hole 20. The battery cover 13 is attached to the edge of the opening 19 by sliding the protrusions 22, 23 and the grooves 24, 25. A printed wiring board 26 and a battery holder 28 are housed within the housing 11. The printed wiring board 26 includes electrical components 27 having various functions. The battery holder 28 is made of an electrically insulating material made of synthetic resin, and has a top plate 29 with a curved inner surface, and side plates 30 and 31 are connected to each other on both sides of the short sides to form a substantially U-shape. A projection 32 is integrally provided at the center of the side surface. The lower part of the printed wiring board 26 is inserted into a groove 33 formed in the top plate 29 of the battery holder 28 and fixed therein.

To fix the printed wiring board 26 to the casing 11, the printed wiring board 26 is inserted into the opening 19 of the casing body 12 with the printed wiring board 26 attached to the battery holder 28. With this insertion, the protrusion 32 provided on the battery holder 28 moves forward while elastically deforming the opening 19 side of the housing body 12, and engages elastically with the hole 20 of the housing body 12. A decorative plate (or name plate) 34 made of an electrically insulating material made of synthetic resin is removably attached to the recess 21, and the hole 20 and the protrusion 3
The second engaging part is covered so as not to spoil the appearance. Printed wiring board 26 and battery holder 28 as described above.
After being fixed to the housing body 11, a power source battery 36 is housed in the battery holder 28, and the battery cover 13 is attached to the opening 19 of the housing body 12 as described above.

Further, after removing the battery cover 13 and the battery 35, the side plates 17 and 18 of the housing body 12 are pressed to elastically deform the side plates 15 and 16, and the protrusion 32 of the battery holder 28 is released from the hole 20. The battery holder 28 and printed wiring board 26 can be removed from the main body 12 of the housing.

In the above embodiment, the protrusion 32 is provided integrally with the battery holder 28, but an elongated groove is formed in the center of one long side of the top plate 29 of the battery holder 28, and a compression spring is inserted into this groove. The base of a long and thin protrusion made of an electrically insulating material such as synthetic resin is interposed therebetween so that the protrusion can be inserted into the groove against the elasticity of the compression spring, and the printed wiring board is inserted in the same way as in the previous embodiment. As the battery holder 26 and the battery holder 28 are inserted into the housing body 12, the protrusion may be advanced in a retracted state, and the protrusion may be engaged with the hole 20 of the housing body 12 by the elasticity of the compression spring. With this configuration, there is no need to deform the opening 19 side of the housing body 12, allowing for smoother insertion.

Able to perform fixed work.

Effects of the Invention As is clear from the above explanation, according to the present invention, a printed wiring board housed in a synthetic resin housing is directly or indirectly attached to the housing by forming protrusions and holes made of synthetic resin. Since the metal parts are fixed in a removable manner, the metal parts will not be exposed, and the electrical components built into the printed wiring board inside the device will be damaged by strong voltages such as static electricity generated near the outer periphery of the device. can be prevented. Furthermore, since conventional screws are not used, the structure of the casing can be simplified, and is advantageous in terms of design, confidentiality, etc. Further, since no special jig is required for attaching and detaching the casing and the printed wiring board, there is an advantage that the troublesomeness of attaching and detaching can be eliminated.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of a conventional portable radio device, FIG. 2 is a sectional view of its assembled state, FIG. 3 is an exploded perspective view of an embodiment of the portable radio device of the present invention, and FIG. 4 is a cross-sectional view of the assembled state. 11... Housing, 2o... Hole, 26...
...Printed wiring board, 28...Battery holder, 32...Protrusion.

Claims (1)

[Claims] A portable radio device characterized in that a printed wiring board housed in a synthetic resin casing is removably fixed to the casing directly or indirectly by engagement of synthetic resin protrusions and holes.