JP3610832B2 - Radio device antenna mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an antenna mounting structure suitable for a waterproof portable wireless device.
[0002]
[Background]
In general, a portable wireless device used in a mountainous area or in a weather disaster is often desired to be a so-called “waterproof type” that prevents rainwater or the like from entering the inside of a casing case.
In the case of such a waterproof portable wireless device, the antenna mounting portion attached to the outside of the housing case also needs to have a waterproof structure, but the conventional antenna plug prepared for mounting the antenna has a length direction. It has a structure with a small square flange for mounting in the middle part.
[0003]
[Problems to be solved by the invention]
For this reason, even if a small packing is interposed between the casing case and the same-angled flange, the seal area that can be secured becomes very small, the antenna plug is tilted by external force applied from the antenna, and rainwater etc. There is a problem of entering the inside of the case.
[0004]
An object of the present invention is to obtain a wireless device antenna mounting structure that reliably maintains waterproof performance even when the antenna plug is tilted by an external force in view of the problems of the conventional wireless device antenna mounting structure as described above. is there.
[0005]
[Means for Solving the Problems]
In order to solve this object, the present invention provides an insulating device capable of placing the antenna plug in a central portion in a wireless device in which the antenna plug is positioned on the outer surface of the housing case and the antenna is connected to the antenna plug. A rectangular recess is formed on the bottom surface of the presser plate to push the square flange of the antenna plug, and a rubber sheet is interposed between the casing case and the presser plate. A presser plate is screwed to the case, and an annular groove surrounding the square recess is formed on the lower surface of the presser plate, the rubber sheet has an outer diameter corresponding to the annular groove, and the presser plate is The present invention proposes an antenna mounting structure that is fixed to a housing case by a plurality of fixing screws at an outer diameter position larger than the groove .
[0006]
According to the present invention, since the rubber sheet is in close contact with the lower surface of the square flange, the invading rain water cannot reach the circular hole and the through hole, so that the intrusion into the inner box case is completely prevented. Will be blocked.
In addition, rain water around the presser plate enters the gap between the outer surface of the upper end wall and the outer surface and the lower surface of the presser plate, but these rainwaters flow into the annular groove that functions as a rain gutter. Is discharged out of the machine from a part of the annular groove.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the details of the embodiments of the present invention will be described with reference to the drawings.
The illustrated embodiment is an example in which the present invention is applied to a base station that controls a plurality of wireless slave stations (not shown).
[0008]
That is, this waterproof portable wireless device includes a waterproof casing case that is bent from a thin metal plate such as a steel plate, but the casing case is provided in an outer box case 10 that is bent into a “U” -shaped cross section. It has the inner case 20 inserted with respect to it.
The inner box case 20 that is opened only on one surface, that is, the surface facing the outer box case 10, has a pair of left and right side walls 22, 23 that are bent at right angles from the left and right sides of the rectangular surface wall 21, and It has a pair of end walls 24 and 25 which are bent at right angles from the upper and lower sides of the surface wall 21 and whose left and right end portions are watertightly coupled to the upper and lower end portions of the corresponding side walls 22 and 23.
[0009]
And inward flanges 22a to 25a whose outer surfaces are pressed against the surface of an elastic waterproof packing sheet 31, which will be described in detail later, are bent at the tips of the side walls 22, 23 and the end walls 24, 25, respectively. Is done.
A plurality of spacer sleeves 51 are stud welded to the inner surface of the surface wall 21 of the inner box case 20 in order to incorporate the main printed circuit board 41 on which electrical components are mounted.
[0010]
The spacer sleeve 51 is assembled with a main printed circuit board 41 on which the CPU element 40 and the like are mounted using a plurality of mounting screws 43 inserted into the mounting holes 42, and the main printed circuit board 41 includes a transmission transformer 44 and the like. A sub printed circuit board 45 incorporating electric parts is fixed via a spacer 46.
[0011]
As can be understood from FIG. 1, for assembly with the outer box case 10, four through holes 24 having relatively large diameters are formed in the portions near the upper and lower ends of the side walls 22, 23 of the inner box case 20. The curry press nuts 61 are caulked to the through holes 24 formed from the inner surfaces of the side walls 22 and 23.
These curry press nuts 61 are screwed with assembly screws 12 inserted from the assembly holes 11 formed in the left and right side walls 14 and 15 of the outer case 10, and the inner case is inserted into the outer case 10 using these assembly screws 12. Although the case 20 can be assembled in an interior state, a waterproof packing sheet 31 made of a fine foamed resin sheet is attached to the inner surface of the surface wall 13 of the outer box case 10, and the inner box with respect to the outer box case 10. In the assembled state of the case 20, the inward flanges 22 a to 25 a of the inner box case 20 are brought into close contact with the outer peripheral portion of the waterproof packing sheet 31, and rainwater or the like can be prevented from entering the inner box case 20.
[0012]
In order to prevent the inner box case 20 from being pulled out upward, end flanges 13a to 15a facing inward are formed at right angles on the upper end portion of the surface wall 13 and the upper end portions of the left and right side walls 14 and 15 of the outer case case 10, respectively. It is bent.
As understood from FIG. 2, a skirt portion 16 is integrally formed at the lower end portion of the outer box case 10 so as to extend below the lower end walls 24 and 25 of the inner case case 20. The enclosure protects electrical components such as a fuse, a power switch, and a handset connector fixed to the lower end wall 25 of the inner box case 20.
Further, the lower end of the skirt portion 16 is provided with folded pieces 13b and 14b that are folded along the corresponding inner surface, and the folded pieces 13b and 14b that reinforce the skirt portion 16 are provided in the outer case 10. It also functions as positioning of the inner box case 20.
[0013]
An antenna 70 is attached to the upper end wall 24 of the inner case 20 described above using an antenna plug 71, and transmission / reception is performed via the antenna 70.
As shown in an enlarged view in FIG. 3, a through hole 72 into which the lower end portion 71 a of the antenna plug 71 can be inserted is formed in the upper end wall 24 of the inner box case 20, and a pair of holes 73 and 74 on both sides of the through hole 72. The curry press nuts 75 and 76 located on the inner surface of the upper end wall 24 are fastened. That is, the antenna plug 71 capable of screwing the upper end nut portion 71b to the antenna 70 has a square flange 71c at the intermediate portion in the longitudinal direction. A disk-shaped insulating resin presser is provided to fix the antenna plug 71. A plate 81 is prepared.
[0014]
The holding plate 81 is formed at the center of a central hole 82 into which the upper end nut portion 71b of the antenna plug 71 can be inserted, and a rectangular recess 83 corresponding to the square flange 71c of the antenna plug 71 is formed on the lower surface thereof. Is formed concentrically with the center hole 82, the antenna plug 71 can be held by the holding plate 81 by positioning the square flange 71 c of the antenna plug 71 in the square recess 83.
As shown in FIG. 4, a concentric annular groove 84 is formed in the lower surface of the pressing plate 81 in the center hole 82 and the rectangular recess 83, and a rubber sheet 91 equal to the inner diameter of the annular groove 84. Is interposed between the presser plate 81 and the outer surface of the upper end wall 24.
[0015]
In order to fix the presser plate 81 to the upper end wall 24, a pair of fixing holes 85 are formed on both sides of the center hole 82 of the presser plate 81 at positions corresponding to the annular groove 84. By inserting the screw portion of the fixing screw 86 to be inserted into the notch 92 of the rubber sheet 91 and the screw holes of the corresponding curry press nuts 75 and 76, the antenna plug 71 and the rubber sheet 91 are attached to the upper end wall 24 by the holding plate 81. Can be fixed liquid-tight.
[0016]
Since the antenna mounting structure of the waterproof portable radio apparatus of the illustrated embodiment is as described above, the square flange 71c of the antenna plug 71 is positioned in the square recess 83 of the holding plate 81. The attachment position of the antenna plug 71 is determined by the engagement between the mold flange 71 c and the square recess 83.
An elastic rubber sheet 91 having a circular hole 93 is interposed between the upper end wall 24 of the inner box case 20 and the presser plate 81, and the rubber sheet 91 is compressed and elastically deformed by tightening the fixing screw 86. Invasion of external rainwater and the like can be completely prevented.
[0017]
That is, when the antenna plug 71 is tilted left and right by an external force applied to the antenna 70, a slight gap is formed between the square flange 71c and the square recess 83 of the antenna plug 71. May invade.
However, since the rubber sheet 91 is in close contact with the lower surface of the equiangular flange 71c, the rainwater that has entered cannot reach the circular hole 93 and the through-hole 72. Is completely blocked.
In addition, rainwater around the outer periphery of the presser plate 81 enters a gap between the outer surface of the upper end wall 24 and the lower surface of the presser plate 81, but these rainwater flows into the annular groove 84 that functions as a rain gutter. When the box case 20 is tilted, it is discharged from a part of the annular groove 84 to the outside of the machine.
[0018]
【The invention's effect】
As is clear from the above description, according to the present invention, the square flange of the antenna plug is held by the press plate having the square recess, and the rubber sheet is interposed between the housing case and the press plate. Therefore, even if the antenna plug is tilted by an external force, a waterproof structure in which rainwater or the like does not enter the inside can be obtained. In particular, according to the antenna mounting structure of the present invention, since the rubber sheet is in close contact with the lower surface of the square flange, the rainwater that has entered cannot reach the circular hole and the through hole. The intrusion inside is completely prevented.
In addition, rain water around the presser plate enters the gap between the outer surface of the upper end wall and the outer surface and the lower surface of the presser plate, but these rainwaters flow into the annular groove that functions as a rain gutter. There is also an effect of being discharged out of the machine from a part of the annular groove by the inclination of.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a waterproof portable wireless device embodying the present invention.
FIG. 2 is an overall cross-sectional view of the waterproof portable wireless device.
FIG. 3 is an enlarged exploded perspective view of an antenna mounting portion of the waterproof portable wireless device.
FIG. 4 is a bottom view of a fixing plate used for the antenna mounting portion.
[Explanation of symbols]
20 Inner box case (housing case)
24 Upper end wall 70 Antenna 71 Antenna plug 71c Square flange 81 Holding plate 82 Center hole 83 Square recess 84 Annular groove 85 Fixing hole 86 Fixing screw 91 Rubber sheet 93 Circular hole

Claims (1)

In the wireless device in which the antenna plug is positioned on the outer surface of the housing case and the antenna is connected to the antenna plug, an insulating press plate that can keep the antenna plug in a through state is provided at the center. the square recess of sticking the square flange of the antenna plug is formed on the lower surface, interposed rubber sheet pressing plate screwed to the housing case and between the pressing plate and the housing case, the pressing An annular groove surrounding the square recess is formed on the lower surface of the plate, the rubber sheet has an outer diameter corresponding to the annular groove, and the presser plate is fixed in a plurality of positions at an outer diameter larger than the annular groove. An antenna mounting structure which is fixed to a housing case by a screw .

Images