JP3273313B2 - Stopper mounting structure for electronic equipment housing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stopper mounting structure for a die-cast housing in a CATV electronic device.

[0002]

2. Description of the Related Art A casing of this type is generally made of aluminum and has a screw hole 52 for repair and inspection as shown in FIGS. 4 and 5, and a die casting made of brass, aluminum or zinc is formed in the screw hole. The monitor cap 53 made of the product was attached. For this reason, if the mounting and dismounting of the monitor cap 53 is repeated, the screw hole 52 is worn out, and the monitor cap 53 becomes unusable. Further, since waterproofing is necessary, if the monitor cap 53 is tightened with an excessive torque in order to securely tighten it, the screw hole 52 of the housing 1 and the screw 54 of the monitor cap 53 may be damaged. In such a case, since the housing 1 is replaced with a new one, the maintenance cost rises, and during the replacement, a CATV signal or the like cannot be transmitted / received to a subsequent electronic device. That is, the center
, The CATV signal from the terminal is stopped, and the terminal cannot satisfactorily watch television.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems.

[0004]

According to the first aspect of the present invention,
In a stopper mounting structure in which a stopper is attached to a screw hole of an electronic device housing via a stopper stopper having an outer periphery of a head serving as a tool holding part for working, a stopper for working tool is attached to the stopper. While forming an annular groove with two seats between a certain head and a screw shaft, of the two seats, the screw shaft side seat has a larger diameter than the seat opposite thereto, and A waterproof packing is provided at the base of the screw shaft, and the stopper stopper is provided with a stopper hole for mounting the stopper and a recess for loosely fitting the seat on the screw shaft side above the stopper hole, and the depth of the recess is: The thickness of the seat portion on the screw shaft side is made substantially equal, and the packing for waterproofing functions effectively immediately before the surface of the seat portion on the screw shaft side becomes almost flush with the top surface of the stopper stopper. The shape of a portion of the stopper hole for connecting with the concave portion of the stopper mounting screw hole is selected.

According to this means, when the stopper is screwed into the stopper stopper screwed to the housing, the presence or absence of a step between the surface of the large-diameter seat portion of the stopper and the top surface of the stopper stopper is visually checked. If the stopper is screwed up to a position where the surface of the large diameter seat is almost flush with the top surface of the stopper, the waterproofing of the stopper mounting screw hole will be ensured and the stopper will be secured. The bottom surface of the concave portion and the lower surface of the large-diameter seat portion are in contact with each other or have a slight gap therebetween, so that excessive tightening of the stopper to the stopper stopper can be prevented. Since the screw hole for mounting the stopper on the housing is larger in diameter than the screw hole for mounting the stopper on the stopper, the stopper is fixed to the housing with a stronger torque than the stopper during assembly. I have. Therefore, when the stopper is normally attached to and detached from the stopper receiving member, the stopper receiving member does not rotate together with the stopper, and the screw hole for attaching the stopper receiving member of the housing does not wear. Further, even if the screw portion for screwing the stopper and the stopper stopper is damaged by excessive tightening torque, the screw for screwing the stopper stopper and the housing having a larger diameter than the screw portion of the stopper. Since the portion is not damaged by the tightening torque at which the screw portion of the stopper is damaged, the stopper stopper can be easily removed from the housing.

According to a second aspect of the present invention, the outer diameter of the stopper on the screw shaft side of the stopper according to the first aspect is made larger than the outer diameter of the socket when the stopper tightening tool is a socket wrench. It is.

According to this means, although the socket of the socket trench does not have a notch as seen on the tip side of the spanner, the surface of the seat on the screw shaft side of the stopper and the top surface of the stopper are received. Since the presence or absence of the step can be visually checked, excessive tightening of the stopper can be avoided.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an electronic device housing according to an embodiment of the present invention.

As shown in FIG. 4, a casing 1 made of aluminum die-casting of a CATV amplifier as a casing for an electronic device is provided with a messenger wire 2 and a messenger wire fitting 3 as shown in FIG.
Is suspended. As shown in FIG. 2, a monitor cap receiver 7 serving as a stopper stopper is mounted on one side wall 4 of the housing 1 at a position facing a monitor terminal 6 provided in an internal unit 5 in the housing 1. Forming a screw hole 8;
A monitor cap 9 as a stopper is attached to the monitor cap receiver 7.

The monitor cap 9 has two seats 1 in the middle.
1 and 12, an annular groove 13 is formed.
12, a hexagonal head 14 is integrally formed on the small-diameter seat 11, a screw shaft 15 is integrally formed on the large-diameter seat 12, and an O-ring groove is formed on the base of the screw shaft 15. 16 are formed. As shown in FIG. 1, the annular groove 13 is used for hanging a mounting piece 19 connected to the housing 1 via a ball chain 18.

As shown in FIG. 2, the monitor cap receiving member 7 has a hexagonal face portion 20 as a work tool retaining portion on the outer periphery.
A screw shaft 22 for screwing with the screw hole 8 of the housing 1 is protruded from the head 21 formed with the hole, and a screw hole 23 for screwing with the screw shaft 15 of the monitor cap 9 is screwed at the center of the screw shaft 22. And head 2
1 has a concave portion 24 into which the large-diameter seat portion 12 of the monitor cap 9 is loosely fitted, and an O-ring 25 as a waterproof packing in which the concave portion 24 is fitted into the O-ring groove 16 at an edge connected to the screw hole 23. An annular groove 29 for fitting an O-ring 28 as a waterproof packing is formed on a surface 27 of the head 21 facing the housing 1. The depth of the recess 24 is equal to the thickness of the large-diameter seat 12 of the monitor cap 9. Therefore, when the surface 33 of the large-diameter seat 12 of the monitor cap 9 and the top surface 34 of the monitor cap receiver 7 are flush, the bottom 31 of the recess 24 and the seat 12
And the further tightening causes a sharp increase in torque, so the tightening is completed when the front surface 33 and the top surface 34 are flush with each other. O-ring groove 1
The O-ring 25 fitted in the monitor cap 9 has the surface 33 of the large-diameter seat 12 of the monitor cap 9 attached to the head 2 of the monitor cap receiver 7.
The water-tightness of the monitor cap mounting screw hole 23 is ensured so as to be in contact with the conical surface 26 of the monitor cap receiver 7 slightly before being flush with the top surface 34 of FIG.

The monitor cap 9 has a large-diameter seat 12.
The diameter of the socket is larger than the socket of the socket trench in consideration of using the socket trench for the work tool.

When the monitor cap 9 is mounted on the monitor cap receiver 7 attached to the housing 1, if there is a foreign substance 36 in the concave portion 24 of the monitor cap receiver 7, as shown in FIG. Before the surface 33 of the portion 12 becomes flush with the top surface 34 of the monitor cap receiving member 7, a smooth screwing cannot be obtained, so that the foreign matter 36 is removed before the stopper is plugged.

[0014]

According to the present invention, when the stopper is screwed into the stopper received on the housing, the step between the top surface of the stopper and the surface of the large-diameter seat of the stopper is visually observed. If the stopper is screwed up to a position where the surface of the large-diameter seat portion is substantially flush with the top surface of the stopper stopper, the waterproofing of the stopper mounting hole is ensured and the stopper stopper is secured. Since the stopper is prevented from being excessively tightened, it is possible to prevent the stopper stopper and the stopper from rotating together, and prevent the screw hole for attaching the stopper stopper of the housing from being worn or damaged.

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of the present invention.

FIG. 2 is a partially cut-away bottom view of the embodiment.

FIG. 3 is a bottom view of FIG. 2 in a state where the monitor cap has bitten a foreign substance.

FIG. 4 is a perspective view of a CATV amplifier suspended on a messenger wire.

FIG. 5 is a cross-sectional view of a conventional monitor cap mounting portion in which a monitor cap is mounted on a housing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 7 Stopper receiver 8 Screw hole 9 Stopper 11 Seat part 12 Seat part 13 Annular groove 14 Head 15 Screw shaft 20 Work tool hanging part 21 Head 23 Stopper screw hole 24 Concave 25 Waterproof For packing 33 surface 34 top surface

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-101731 (JP, A) JP-A 6-70176 (JP, U) JP-A 50-82692 (JP, U) 22986 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 13/52 F16B 31/02 H04N 7/16 H01R 13/74 H01R 13/73 H01R 9/18 H01R 4/30 H01R 4/38

Claims (2)

(57) [Claims] 1. A stopper mounting structure in which a stopper is attached to a screw hole of a housing for an electronic device via a stopper stopper whose outer periphery of a head is a work tool retaining portion. An annular groove is formed by two seats between the head, which is a tool retaining portion, and the screw shaft, and a seat on the screw shaft side of the two seats is larger than a seat opposite thereto. Waterproof packing is provided at the base of the screw shaft, and a stopper hole is formed in the stopper stopper and a recess for loosely fitting the screw shaft-side seat above the stopper hole. Is approximately equal to the thickness of the screw shaft-side seat, and the waterproof packing is immediately before the surface of the screw shaft-side seat is substantially flush with the top surface of the stopper stopper. The shape of a portion of the stopper hole for connection with the recess is selected so as to function effectively. Stopper mounting structure in the child device housing. 2. The stopcock fastening tool is a socket wrench,
2. The stopper mounting structure according to claim 1, wherein an outer diameter of a seat on the screw shaft side of the stopper is larger than an outer diameter of the socket of the socket trench.