JP4269458B2 - Annular fluorescent lamp fixture - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention forms a single discharge path including a large annular arc tube having a large ring diameter and a small annular arc tube having a small ring diameter, and pre-heats each filament electrode at the time of start-up. The present invention relates to an annular fluorescent lamp apparatus incorporating a lamp.
[0002]
[Prior art]
In this type of annular fluorescent lamp fixture, a lighting circuit attached to the fixture main body and the annular fluorescent lamp are detachably connected using a lamp socket / base. The lamp socket is the output side of the lighting circuit, and the base is attached to the annular fluorescent lamp. All are quadrupole. Two of the four poles of the lamp socket are on the power supply side, and the remaining two poles are on the non-power supply side (preheating side). There is no distinction between the power supply side and the non-power supply side in the base part. If one pole with the filament electrode is on the power supply side, it is sufficient that the other corresponding pole is on the non-power supply side. Further, if one pole is on the non-power supply side, it is sufficient that the corresponding other pole is on the power supply side.
[0003]
[Problems to be solved by the invention]
Generally, there is no distinction between the power source side and the non-power source side in the base part. However, this can be a problem. Any of the power supply side (non-power supply side) is normally lit externally, but the negative fluorescent lamp may be adversely affected at the end of its life and the annular fluorescent lamp may be overheated.
An object of the present invention is to give the base part a distinction between the power supply side and the non-power supply side and to guarantee it. As a result, appropriate distinction is made not only at the time of assembly but also at the time of subsequent maintenance or repair, thereby providing a reliable annular fluorescent lamp device that does not become an abnormal temperature at the end of its life. is there.
[0004]
[Means for Solving the Problems]
In this invention, the instrument main body with a lighting circuit is provided. A double ring lamp is disposed along the outer surface of the instrument body. The double ring lamp is a double ring and preheated type that forms a single discharge path including a large annular arc tube with a large ring diameter and a small annular arc tube with a small ring diameter and preheats each filament electrode at start-up. An annular fluorescent lamp. A lamp socket is provided as an output terminal of the lighting circuit. The lamp socket is a four-pole type including two poles on the power source side and two poles on the non-power source side (preheating side). A quadrupole socket receiver is provided on the base of the double ring lamp. A thermal fuse is installed in the base. A thermal fuse is connected in series with any one pole in the socket receptacle. When the lamp socket is detachably attached to the socket receiving portion, four-pole wiring connection is made, and one pole on the power source side of the lamp socket and the thermal fuse 0 are in series.
A combination specifying means is provided either on the lamp socket / between the fixture body or between the lamp socket / socket receiving part. The combination selection means is a means for allowing the connection form and prohibiting other connection forms.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The embodiment of the present invention will be described with reference to FIGS. In the present invention, the device main body 100 to which the lighting circuit 110 is attached is provided. A double ring lamp 200 disposed along the outer surface of the instrument body 100 is provided. The double ring lamp 200 forms a single discharge path including a large annular light emitting tube 210 having a large ring diameter and a small annular light emitting tube 220 having a small ring diameter, and preheats each filament electrode at start-up. This is a preheated annular fluorescent lamp. A lamp socket 120 serving as an output terminal of the lighting circuit 110 is provided. The lamp socket 120 is a four-pole type including two poles 122 and 124 on the power source side and two poles 126 and 128 on the non-power source side (preheating side). A quadrupole socket receiving part 242 formed in the base part 240 of the double ring lamp 200 is provided. A thermal fuse 260 housed in the base part 240 is provided. The thermal fuse 260 is connected in series with an arbitrary one pole 222 in the socket receiving part 242. When the lamp socket 120 is detachably attached to the socket receiver 242, a four-pole wiring connection is made, and the power pole 1 pole 122 and the temperature fuse 260 in the lamp socket 120 are in series. .
The combination specifying means 900 is provided either between the lamp socket 120 and the instrument main body 100 or between the lamp socket 120 and the socket receiver 242. The combination sorting means 900 is a means for allowing the connection form and prohibiting other connection forms.
A supplementary explanation will be given. Reference numeral 112 denotes an AC power source, 114 denotes a main circuit that receives and drives the AC power source 112 to generate a high frequency voltage and supplies power to the double ring lamp 200, and 116 denotes a preheating capacitor, which constitute the lighting circuit 110. For convenience of explanation, it is understood that the thermal fuse 260 does not belong to the lighting circuit 110 but belongs to the base portion 240. The thermal fuse 260 is a normally closed type, and is opened when the double ring lamp 200 is overheated to stop power supply to the double ring lamp 200 and turn it off to prevent further abnormal temperature. Output terminal electrodes 122 to 128 of the lighting circuit 110 belong to the lamp socket 120. A translucent cover 500 is detachably attached to the instrument body 100 and covers one side of the instrument body 100 and the double ring lamp 200.
The illustrated instrument body 100 is a ceiling-mounted type. The illustrated range is mainly the reflection plate portion of the instrument body 100. In this embodiment, the lamp socket 120 is engaged with the reflection plate of the instrument main body 100, and the connection portion is exposed to the lower surface side. An appropriate number of lamp holders 105 are attached to the lower surface side of the instrument body 100. The double ring lamp 200 is detachably held by the lamp holder 105 or the lamp socket 120.
The base portion 240 of the double ring lamp 200 is located at the end of each ring of the large annular arc tube 210 and the small annular arc tube 220. A pair of filament electrodes (not shown) is located almost at the base portion 240. Therefore, the vicinity of the base portion 240 is likely to overheat. The overheating is detected by the thermal fuse 260. The input terminal electrodes 222 to 228 of the double ring lamp 200 correspond to the output terminal electrodes 122 to 128 of the lamp socket 120. The former is in the form of a connection pin, and the latter is in the form of a pin holder not shown. Normally, the input terminal electrode 222 (224) is in contact with the output terminal electrode 122 (124), and the input terminal electrode 226 (228) is in contact with the output terminal electrode 126 (128). The thermal fuse 260 is in series with the input terminal electrode 222 and also in series with the output terminal electrode 122 through the input terminal electrode 222. The thermal fuse 260 is located on the power supply side (main circuit 114 side) when viewed from the double ring lamp 200 (more precisely, the lamp body). Therefore, when the thermal fuse 260 is opened, the power supply to the double ring lamp 200 is stopped and turned off. The preheating capacitor 116 side is the non-power supply side when viewed from the double ring lamp 200. Even if the circuit of the preheating capacitor 116 is opened, the lighting of the double ring lamp 200 continues. For this reason, it is meaningless to open the circuit of the preheating capacitor 116 during overheating.
The double ring lamp 200 of FIG. 4 is in the range of the input terminal poles 222-228 not including the output terminal poles 122-128. In general, the range of the input terminal electrodes 222 to 228 can be switched to the left and right objects shown in the figure and connected to the output terminal electrodes 122 to 128. In this case, the thermal fuse 260 is positioned not on the output terminal electrode 122 side (power supply side) but on 128 (non-power supply side). Therefore, even if the thermal fuse 260 is on the non-power supply side, there is no problem in lighting, and therefore, it may continue to be used in that state. In such a case, the double-ring lamp 200 may be overheated at the end of its life and reach an abnormal temperature, which is dangerous. The double-ring lamp 200 is a high-power type with a long discharge path than the single-ring lamp, and the whole is compact, so there is a high concern about overheating. The present invention eliminates the possibility that the thermal fuse 260 is placed on the non-power supply side and lights up. For this purpose, for example, the following combination specifying means 900 is added.
The combination specifying means 900 is means for specifying the connection of the output terminal electrodes 122 to 128 and the input terminal electrodes 222 to 228 as described above. In the illustrated example, the combination specifying means 900 is provided between the lamp socket 120 and the instrument main body 100. A convex portion 129 is formed on the side surface of the lamp socket 120, and a concave portion 199 is formed around the socket receiving hole 198 in the reflection plate portion of the instrument body 100. The combination of both is possible only in a mode in which the concave portion 199 fits into the convex portion 129. Therefore, the posture of the projection 129 and the lamp socket 120 is specified, the relationship between the output terminal electrodes 122 to 128 on the lamp socket 120 side and the input terminal electrodes 222 to 228 on the double ring lamp 200 side is specified, and the temperature fuse 260 is specified. Is always on the power supply side.
As far as the mutual relationship between the lamp socket 120 and the socket receiver 242 is concerned, there are generally two types of combinations thereof, one of which is the thermal fuse 260 on the power supply side and the other is on the non-power supply side. To position. When the lamp socket 120 is unillustrated from the fixture body 100 via a cord not shown in the figure, an appropriate irregular part is added to the lamp socket 120 / socket receiving part 242, and the convex part is attached to and detached from the concave part. Only the combination that freely engages is allowed, and even if the thermal fuse 260 is positioned on the power supply side under the circumstances, the combination specifying means of the present invention is of such a mode. There is no problem.
Further supplement the explanation. As described above, the base portion of the present invention has a distinction between the power source side and the non-power source side. The combination specifying means of the present invention ensures that the power source side of the base part is always wired as the power source side in relation to the lighting circuit or the lamp socket. Although the error that the power supply side does not become the power supply side may occur during assembly of the instrument or subsequent maintenance or repair, the combination specifying means of the present invention eliminates the room for such an error.
[0006]
【The invention's effect】
The present invention includes a combination specifying means for giving a distinction between the power source side and the non-power source side to the base part and for guaranteeing it. According to this, an appropriate combination is made not only at the time of assembling the apparatus but also at the time of subsequent maintenance or repair, thereby obtaining a highly reliable annular fluorescent lamp apparatus that does not become an abnormal temperature at the end of its life. .
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an annular fluorescent lamp apparatus according to the present invention.
FIG. 2 is an enlarged exploded perspective view showing a main part of the instrument main body of FIG.
3 is an enlarged perspective view showing a main part with the double ring lamp of FIG. 1 turned upside down. FIG.
4 is a circuit diagram of the device of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100: Appliance main body 105: Lamp holder 110: Lighting circuit 112: AC power supply 114: Main circuit 116: Preheating capacitor | condenser 120: Lamp socket 122 * 124 * 126 * 128: Output terminal pole 129: Convex part 198: Socket receiving hole 199 : Recess 200: Double ring lamp 210: Large annular arc tube 220: Small annular arc tube 222 · 224 · 226 · 228: Input terminal electrode 240: Base portion 242: Socket receiving portion 260: Thermal fuse 500: Translucent cover 900: Combination specifying means

Claims (1)

An instrument body having a lighting circuit attached thereto, and a double ring lamp disposed along an outer surface of the instrument body, wherein the double ring lamp is a large annular light emitting tube having a large ring diameter and a small annular light emitting having a small ring diameter. A double-ring and pre-heated annular fluorescent lamp that forms a single discharge path including a tube and pre-heats each filament electrode at start-up,
A lamp socket serving as an output terminal of the lighting circuit, the lamp socket being a four-pole type including two poles on the power source side and two poles on the non-power source side (preheating side); A four-pole socket receiving portion formed on the base, and a thermal fuse housed in the base portion, connecting the thermal fuse in series with any one pole in the socket receiving portion, and connecting the lamp socket to the lamp socket It is a form in which four-pole wiring connection is made when it is detachably attached to the socket receiving part, and one pole on the power source side in the lamp socket and the temperature fuse are in series,
A combination specifying means is provided in either the lamp socket / apparatus body or between the lamp socket / socket receiving part, and the combination specifying means allows the connection form and prohibits other connection forms. An annular fluorescent lamp apparatus characterized by the following:

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