JPS629661Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a plug-in detector incorporating a printed circuit board.

[Background technology]

Conventionally, as this type of plug-in type detector, those shown in FIGS. 1 and 2 have been provided. In the case shown in FIG. 1, the base 5 of the plug blade 4 is fixed to a predetermined position of the printed circuit board 1 by caulking or with screws 8, etc., and the printed circuit board 1 is fixed to the case 2.
The printed circuit board 1 is clamped and fixed by fixing protrusions 9 disposed inside the case 2 and protrudes into the case 2, or the printed circuit board 1 is fixed to the case 2 with screws 10 or the like. In the figure, 11 is an electronic component mounted on the printed circuit board 1, 12 is a copper foil, and 6 is a terminal of the plug blade 4. However, in this case, the input and output signals from the terminal 6 of the plug blade 4 must match the input and output terminal positions on the printed circuit board 1.
There was a problem in that the routing of the pattern on the printed circuit board 1 became complicated and the printed circuit board 1 became larger. In addition, in the case shown in FIG. 2, the plug blade 4 is fixed to the case 2 by screws, rivets 14, or simultaneous molding, etc., so that the terminal 6 of the plug blade 4 protrudes from the case 2, and the insertion hole 15 is bored. A printed circuit board 1 is disposed in a case 2, and the base 5 of the plug blade 4 is passed through the insertion hole 15 of the printed circuit board 1, and the base 5 and a predetermined position of the printed circuit board 1 are connected with a lead wire 7. . However, in this case, since the base 5 of the plug blade 4 is passed through the insertion hole 15 of the printed circuit board 1, it is necessary to mount the electronic components 11 around the insertion hole 15 within an insulating distance. I can't do it,
In the end, there was a problem that the printed circuit board 1 became larger.

[Purpose of invention]

The present invention has been made in view of the above points, and an object of the present invention is to provide a plug-in type detector whose printed circuit board can be miniaturized.

[Disclosure of invention]

That is, in the present invention, the insulating plate 3 is disposed on the inner surface of the case 2 in which the printed circuit board 1 is installed, and the base 5 of the plug blade 4 is fixed between the insulating plate 3 and the case 2. The above object is achieved by a plug-in type detector in which the terminal 6 is made to protrude outward from the case 2 and the base 5 of the plug blade 4 and the printed circuit board 1 are electrically connected by a lead wire 7.

The present invention will be explained in detail below with reference to examples. As shown in FIGS. 3 to 5, a printed circuit board 1 on which electronic components 11 and the like are mounted is disposed within the case 2. As shown in FIGS. An insulating plate 3 is disposed on the inner surface of the case 2 facing the printed circuit board 1. A base 5 of a plug blade 4 is inserted between the insulating plate 3 and the case 2. The base 5 of the plug blade 4 is sandwiched between the case 2 and the insulating plate 3 by passing a protrusion 17 protruding from the inner surface of the insulating plate 3 through the insulating plate 3 and thermally welding it.
In addition, as shown in FIG.
The base 5 of the plug blade 4 may be fixed to the case 2 by inserting it into the screw hole 19 of the insulating plate 3 and thermally welding it. Furthermore, as shown in FIG. The plug blade 4 may be firmly fixed to the case 2 by being inserted into a screw hole 20 provided in the plug blade 4. The terminal 6 of the plug blade 4 projects outward from the terminal opening 21 of the case 2. Pivot blade 4
One end of a lead wire 7 is connected to the base 5 of the lead wire 7, and the other end of the lead wire 7 is connected to a predetermined position of the printed circuit board 1, that is, according to the input signal and output signal of the terminal 6 of the plug blade 4. It is connected to the input terminal and output terminal position of the printed circuit board 1.

By connecting the plug blade 4 and the printed circuit board 1 with the lead wire 7, the printed circuit board 1
Therefore, the input and output terminal positions of the pattern formed on the printed circuit board 1 can be freely set, and complicated routing is not necessary. Furthermore, the electronic components 11 mounted on the printed circuit board 1 can be arranged freely, allowing the electronic components 11 to be arranged rationally, and the area required for mounting can be reduced. Also, the increase in thickness is due to the insulating plate 3
The total thickness of 0.5 mm (0.5 mm or more than the legal regulation) and 1 mm of the heat welding part should be about 1.5 mm. The plug-in detector thus formed is used for fire alarms, smoke detectors, gas leak alarms, and the like.

The plug-in type detector 27 is attached to the dedicated base 24 of the switchbox 23 attached to the wall 22 with fixing screws 25 as shown in FIGS. 6 and 7. If the screw head of the fixing screw 25 inserted into the hole 26 is crushed, the detector 27
The problem arises that it cannot be removed using a screwdriver. In addition, if you try to remove the detector 27 by force, the detector 27 and the dedicated base 24 will often be damaged, so the detector 27 and dedicated base 24 shown in Fig. The configuration of the dedicated base 24 is shown. That is, in the sensor shown in FIG. 8, a screw insertion hole 29 larger than the diameter of the screw head of the fixing screw 25 is formed in the detector 27, and a thin screw fixing piece 28 is provided protruding from the inner surface of the screw insertion hole 29. A screw hole 26 is formed on the inner periphery of the screw fixing piece 28, and this screw insertion hole 2
The detector 27 is attached to the dedicated base 24 with the screw head of the fixing screw 25 inserted into the fixing screw 9 in contact with the screw stopper 28. In this case, when the detector 27 is pulled in the direction of arrow A, the thin screw fixing piece 28 easily hits the screw head and breaks, allowing the detector 27 to be removed. Moreover, the one shown in FIG.
Furthermore, in the case shown in FIG. 10, the thickness of the screw hole part 32 of the dedicated base 24 is made thinner, so that the strength of this screw hole part 32 is made weaker than other parts. , the nut 33 for fixing the fixing screw is pulled by the fixing screw 25 so that the screw hole 32 can be easily destroyed. In this way, even if the threads of the fixing screw 25 become damaged, the detector 27 can be easily attached to the dedicated base 24.
Moreover, since only one of the detector 27 or the dedicated base 24 is destroyed, it is sufficient to replace only one of them. Furthermore, FIGS. 11 and 12 show other structures of the detector 27.
A screwdriver insertion groove 34 communicating with the screw hole 26 of No. 7
is provided in the detector 27. Figure 11a,
b shows a back view of the detector 27. The driver insertion groove 34 may be provided vertically as shown in FIG. 11a, or horizontally as shown in FIG. 11b. Fixing screw 25 to dedicated base 24
When removing the detector 27 fixed with
As shown in FIG. 12, when the driver 35 is inserted into the driver insertion groove 34 and tilted forward, the tip of the driver 35 will be inserted into the detector 27 or the special base 2.
The molding device in the screw hole portion 32 of No. 4 can be easily destroyed by applying a lever, and since the groove 34 is provided facing the screw hole 26, no force is applied to the screw hole portion 32. It is highly efficient and does not damage other parts.

[Effect of idea]

As mentioned above, the present invention provides an insulating plate on the inner surface of the case in which the printed circuit board is installed, and also fixes the base of the plug blade between the insulating plate and the case so that the terminal of the plug blade is placed outside the case. Since the base of the plug blade and the printed circuit board are electrically connected by a lead wire, the plug blade and the printed circuit board are insulated with an insulating plate to eliminate the influence of the plug blade, making it possible to rationalize electronic components on the printed circuit board. In addition to being able to be mounted in a high-density arrangement, the printed circuit board pattern can be formed in a concentrated manner by connecting with lead wires without complicated routing, and the printed circuit board can be made smaller. .

[Brief explanation of the drawing]

1 and 2 are sectional views of the conventional example, FIG. 3 is a sectional view of an embodiment of the present invention, FIG. 4 is a sectional view of the main parts of the same, and FIG. 5 is a perspective view of the main parts of the same. Figures 6 and 7 are cross-sectional views showing the problems of the plug-in detector, Figure 8 is a cross-sectional view of the main part that solves the above problem, and Figures 9 and 10 are the main points of other examples of the same. FIGS. 11a and 11b are bottom views of still another example of the same, and FIG. 12 is a sectional view of the same. 1 is a printed circuit board, 2 is a case, 3 is an insulating board,
4 is a plug blade, 5 is a base, 6 is a terminal, and 7 is a lead wire.

Claims (1)

[Scope of utility model registration request] An insulating plate is arranged on the inner surface of the case in which the printed circuit board is installed, and the base of the plug blade is fixed between the insulating plate and the case so that the terminal of the plug blade protrudes outside the case. A plug-in type detector that is electrically connected to a printed circuit board using lead wires.