JP3911675B2 - Electrical equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric device apparatus having a structure in which a unitized electric device main body is attached to a wall surface of a flange unit, and a cover body is attached to the flange unit so as to cover the electric device main body.
[0002]
[Related background]
An electric device such as a flame detection device has a structure in which the main body of the electric device is attached to a wall surface of a predetermined flange unit. More specifically, a flame detection device that monitors the combustion state of a gas burner includes a flange unit fixedly attached to a flame detection viewing window, a flame detection sensor such as an ultraviolet ray detection discharge tube (UV tube), and this UV. A device main body (electric device main body) including a shutter mechanism that selectively shields the light receiving window of the tube is attached, and a cover body is attached to the flange unit so as to cover the device main body.
[0003]
Typically, Japanese Patent Publication No. 44-1039 shows the construction of a discharge tube for ultraviolet detection, and Japanese Patent Publication No. 47-7878 discloses its detection circuit.
[0004]
[Problems to be solved by the invention]
However, in this type of apparatus, it cannot be denied that the vibration accompanying the operation of the shutter mechanism described above is transmitted to the flange unit and the cover body. Such vibration becomes an annoying noise consisting of a so-called “billing sound”. Moreover, this kind of unintentional vibration tends to cause loosening of the screws fixing the apparatus main body and the cover body to the flange unit. Therefore, in the apparatus having the structure described above, it is important to suppress unintended vibrations of the apparatus main body and the cover body.
[0005]
The present invention has been made in view of such circumstances, and an object of the present invention is to provide an electronic device apparatus having a simple configuration capable of suppressing unintentional vibrations of an electric device body having a mechanical vibration source therein. It is to provide.
[0006]
[Means for Solving the Problems]
In order to achieve the above-described object, an electrical apparatus apparatus according to the present invention has a mechanical vibration source, and supports an electrical apparatus body incorporated in a predetermined casing and unitized on a wall surface of a flange unit. And a structure in which a cover body is attached to the flange unit so as to cover the electric device main body,
In particular, a cable that is drawn through an insertion hole provided in the flange unit and connected to the electric device main body is disposed in a gap between the outer surface of the electric device main body and the inner surface of the cover body, and the cable is used as a cushioning material. It is used as a feature.
[0007]
Incidentally, the cable is made of a covered wire in which a conductor is covered with an insulator, and the insulator of the covered wire is used as a cushion material inserted in a gap between the outer surface of the electric device main body and the inner surface of the cover body. It is characterized by. In particular, when there are a plurality of cables connecting the electric device main body and the external device, it is preferable to disperse these cables along the bottom surface and the side wall surface of the electric device main body.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an electronic device apparatus according to an embodiment of the present invention will be described with reference to the drawings, taking as an example a flame detection apparatus that monitors the combustion state of a gas burner or the like.
As shown in an exploded perspective view of FIG. 1, the flame detection apparatus is schematically a flange unit 20 attached to a flame viewing window (not shown) such as a gas burner, and a unit attached to the flange unit 20. A holder 30 and a shutter unit 40 incorporated in the lower part of the unit holder 30 are provided. 2, the flame detection unit 10 is detachably mounted on the upper surface of the unit holder 30 and the unit holder 30 and the shutter unit 40 are collectively attached by a cover 50 as shown in FIG. Used to cover.
[0009]
The shutter unit 40 includes a shutter blade 41 provided to face the front end of the flame detection unit 10 mounted on the upper surface of the unit holder 30, and the shutter blade 41 is displaced to the flame detection unit 10. And a drive mechanism 42 composed of a solenoid coil for selectively blocking the incidence of ultraviolet rays.
[0010]
Incidentally, the shutter blade 41 is made of a long leaf spring body such as stainless steel (SUS) bent in an L shape with the tip portion facing upward, and the tip portion is displaced with the rear end portion (root portion) as a fixed portion. It has a shape with a sufficiently large stroke. The shutter blade 41 is normally biased upward by its elastic force, and the light receiving window (front end) of the flame detection unit 10 with the tip end bent in an L shape attached to the upper surface of the unit holder 30. Part). When the solenoid coil (driving mechanism) 42 is energized, the shutter blade 41 is bent downward against its elastic force, and its tip is retracted from the front surface of the light receiving window of the flame detection unit 10. As a result, the flame light (ultraviolet rays) coming through the above-mentioned viewing window is incident on the flame detection unit 10 and eventually the UV tube 1 housed in the flame detection unit 10, and the flame by the flame detection unit 10 (UV tube 1). Detection is performed.
[0011]
Here, the flame detection unit 10 assembles and holds an ultraviolet ray detection discharge tube (UV tube) 1 on its holding body (tube holder) 2 as shown in FIG. And it has the structure accommodated in the inside of the elongate cylindrical casing 3. FIG. The casing 3 is made of a light-shielding member having a light receiving window 3a at its tip, and is made of a truncated cone-shaped cylinder whose diameter is slightly reduced toward the tip. And while protecting the UV tube 1 accommodated in the inside from external force, it plays the role which blocks | prevents incidence | injection of the light (ultraviolet ray) other than the said light reception window 3a. An external connection terminal 4 connected to a pair of discharge electrodes of the UV tube 2 is provided on the rear side surface (rear end portion of the casing 3) of the holding body 2 that closes the rear end portion of the casing 3. ing.
[0012]
The UV tube 1 has a structure in which a pair of discharge electrodes (not shown) are enclosed in a cylindrical glass tube 1a, and lead terminals 1b of the discharge electrodes are led out from the rear ends thereof. The holding body 2 is made of, for example, a synthetic resin made by injection molding, and includes a disk-shaped base portion 2a to which the UV tube 1 is attached at one end portion, and the other end portion at the other end portion. It has a structure provided with a disk-shaped terminal block 2b on which an external connection terminal 4 for the lead terminal 1b is mounted. The disc-shaped base portion 2a and the terminal block portion 2b are provided coaxially so as to face each other via a plate-like connecting portion 2c.
[0013]
The connecting portion 2c secures a space into which the sealing projection 1c of the UV tube 1 attached to the base portion 2a enters. Further, in the space formed by the connecting portion 2c, the lead terminal 1b of the UV tube 1 held by the base portion 2a and the connecting piece of the external connection terminal 4 attached to the terminal base portion 2b are electrically resistant. They are connected to each other through the body 5 and lead wires. Then, the UV tube 1 held by the holding body 2 and connected to the external connection terminal 4 is packaged by fitting a cap-like packing body 6 at the tip thereof into the casing 3. . The cap-shaped packing body 6 is made of silicone rubber or the like, and plays a role of hermetically sealing between the outer peripheral surface of the UV tube 1 and the inner peripheral surface of the casing 3. In addition, an opening 6 a that opens with the tip of the UV tube 1 as a light receiving window is provided at the tip of the packing body 6.
[0014]
The above-described unit holder 30 is configured such that such a flame detection unit 10 is detachably attached to the upper surface thereof, and the tip end portion of the flame detection unit 10 is generally fitted on the mounting surface side to the flange unit 20. The tip holding part (receiving part) 31 is provided. The aforementioned shutter blade 41 is selectively positioned inside the tip holding portion 31. In addition, an arc-shaped holding frame 32 that holds the peripheral wall of the flame detection unit 10 is provided at a substantially central portion of the unit holder 30, and a rear end portion of the unit holder 30 is opposed to the tip holding portion 31. A pair of press contact terminals 33, 33 are mounted side by side. These pressure contact terminals 33 and 33 are in pressure contact with the pair of external connection terminals 4 and 4 provided at the rear end portion of the flame detection unit 10 mounted on the upper surface of the unit holder 30, respectively. It is what you make. A predetermined drive voltage is applied to the UV tube 1 from these pressure contact terminals 33 and 33 via the external connection terminals 4 and 4.
[0015]
The flange unit 20 is provided with an insertion hole 21 for laying a cable for electrically connecting the shutter unit 30 and an external device (not shown) as shown in FIG. A cable pipe (not shown) is coupled to the insertion hole 21, and a plurality of (four) cables 25 (25a, 25b, 25c, 25d, for example, as shown in FIG. ) Is pulled into the flange unit 20. Incidentally, each cable 25 comprises a coated wire in which a metal conductor is covered with an insulator such as polyvinyl chloride or ethylene propylene rubber. Of these cables 25, two cables 25a and 25b are for driving the solenoid coil 42, and the remaining two cables 25c and 25d are for driving the UV tube 1 described above.
[0016]
Each of these cables 25 includes a pair of terminal portions 34 and 34 respectively connected to the press contact terminals 33 and 33 provided on the unit holder 30 assembled to the flange unit 20 as shown in FIG. The shutter unit 40 assembled at the lower part of the holder 30 is connected to a pair of terminal portions 44, 44 connected to the solenoid coil 42 described above.
[0017]
Now, the electronic device device (flame detection device) according to the present invention is characterized by two driving coils for the solenoid coil 42 as shown in FIG. 5 when the shutter unit 30 is viewed from the bottom side. The cables 25a and 25b are arranged along the bottom surface of the shutter unit 30, and the two cables 25c and 25d for driving the UV tube 1 are distributed along the both side surfaces of the shutter unit 30, respectively. It is in the arrangement point.
[0018]
Note that these cables 25 are arranged to be locked to hook-shaped cable hooks 35 provided on the bottom surface and both side surfaces of the shutter unit 30. Incidentally, these cable hooks 35 are respectively provided on the bottom surface and both side surfaces of the shutter unit 30 with a projecting dimension slightly lower than the wire diameter (outer diameter) of each cable 25. And in the part which faces the back surface of each said cable hook 35 in the bottom face and the both sides | surfaces of the said shutter unit 30, respectively, the escape groove (not shown) for cable insertion is each provided. Each cable 25 is stably laid on the bottom surface and both side surfaces of the shutter unit 30 without being displaced by being fitted into such a relief groove and locked to the cable hook 35. .
[0019]
Then, as described above, the four cables 25 are laid, and these cables 25 are connected to the terminal portions 34, 34, 44, 44, respectively, and then the cover 50 is covered with the unit holder 30 and the shutter unit 40 by the flange. When attached to the unit 20, the cables 25 are sandwiched in the gaps between the bottom surface and both side surfaces of the shutter unit 40 and the inner surface of the cover 50 as shown in FIG.
[0020]
Then, each of these cables 25 functions as a cushion material in which the covering insulator is inserted in the gap between the bottom surface and both side surfaces of the shutter unit 40 and the inner surface of the cover 50. As a result, the vibration generated when the solenoid coil 42 described above is intermittently energized to drive the shutter blade 41 to be displaced is absorbed by the covering insulator of the cable 25 acting as the cushioning material, so that the cover 50 is not used. It does not vibrate intentionally or the above-mentioned annoying hail sounds. In particular, in the flame detection device having the structure described above, the weight of the holder unit 20 attached to the flange unit 20 and the shutter unit 40 attached to the lower part of the holder unit 20 acts strongly on the lower surface of the cover 50. Therefore, it is useful to lay the cable 25 on the bottom surface and both side surfaces of the shutter unit 40 as described above. In addition, since the unintentional vibration is suppressed in this way, it is possible to prevent a problem that the screws or the like attached to the flange unit 20 with the holder unit 30 and the cover 50 gradually loosen.
[0021]
Further, as described above, a plurality of (four) cables 25 are distributed and arranged on the bottom surface and both side surfaces of the shutter unit 40, so that the cables 25 laid through the insertion holes 21 of the flange unit 20 are pulled from the outside. Even in such a case, the tensile force is distributed in different directions. These distributed tensile forces are received by the cable hooks 35 described above. Therefore, an unintentional external force is not applied to the terminal portions 34, 34, 44, 44 to which the cables 25 are connected, and the connection state is stably maintained.
[0022]
The present invention is not limited to the embodiment described above. Here, the flame detection device has been described as an example, but the present invention can be similarly applied to other electronic device devices having similar housing structures. In the embodiment, the four cables 25 are distributed and laid on the bottom surface and both side surfaces of the shutter unit 40. However, when more cables are wired, they may be laid on the upper surface side. Of course it is possible. In addition, the present invention can be variously modified and implemented without departing from the scope of the invention.
[0023]
【The invention's effect】
As described above, according to the present invention, the cable connected to the electronic device main body is laid in the gap between the electronic device main body and the cover covering the electronic device main body, and the cable functions as a cushioning material. With the configuration, it is possible to effectively reduce the vibration from the vibration source incorporated in the electronic device main body and eliminate annoying vibration noise. In addition, since a plurality of cables are distributed and laid around the electronic device main body, effects such as sufficiently increasing the tensile strength can be achieved.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a schematic overall structure of a flame detection apparatus as an electronic apparatus apparatus according to an embodiment of the invention.
2 is a partial cross-sectional configuration diagram showing an assembly structure of the flame detection device shown in FIG. 1;
FIG. 3 is an exploded view showing a schematic configuration of a flame detection unit.
FIG. 4 is a diagram showing a laying form of a plurality of cables in the flame detection apparatus shown in FIG. 1;
FIG. 5 is a diagram showing a laying form of a plurality of cables as viewed from the back side of the shutter unit.
FIG. 6 is a view showing a state of a cable laid in a gap between the bottom surface and both side surfaces of the shutter unit and the inner surface of the cover.
[Explanation of symbols]
10 Flame detection unit 20 Flange unit 25 Cable 30 Unit holder 40 Shutter unit 41 Shutter blade 42 Solenoid coil 50 Cover

Claims (3)

An electric device body incorporated into a predetermined casing and unitized;
A flange unit for supporting the electric device main body mounted on the wall surface, with an insertion hole for a cable connecting the electric device main body and the external device,
A cover body that covers the electric device main body and is attached to the flange unit;
A cable that is drawn through the insertion hole and connected to the electric device main body is disposed in a gap between the outer surface of the electric device main body and the inner surface of the cover body, and the cable is used as a cushioning material. Equipment device. The electric device according to claim 1, wherein the cable is a covered wire in which a conductor is covered with an insulator, and the insulator is used as a cushioning material. The electrical device apparatus according to claim 1, wherein the cable includes a plurality of cables arranged in a distributed manner along a bottom surface and a side wall surface of the electrical device main body.

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