JPH0864319A - Abnormal heat generation preventing method for socket of fluorescent lamp and fluorescent lamp socket - Google Patents

Abstract

PURPOSE: To provide an abnormal heat generation preventing method for a socket of fluorescent lamp and provide a fluorescent lamp socket, capable of preventing serious accident occurrence due to abnormal heat generation by lamp attachment failure without using an interlock mechanism. CONSTITUTION: An abnormal heat generation preventing method for a socket of fluorescent lamp is for preventing abnormal heat generation caused by contact failure of lamp pins 1 and pin receiving contactors 2 of the socket of a fluorescent lamp which has a pair of the pin receiving contactors 2 to be brought into contact with a pair of the lamp pins 1. Charging parts of both electrodes are forcedly short-circuitted to stop abnormal heat generation by melting an insulator 3 interposed between the charging parts of both electrodes at the same potential as that of the pair of pin receiving contactors 2 by the abnormal heat.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing abnormal heat generation of a fluorescent lamp socket and a fluorescent lamp socket.

[0002]

2. Description of the Related Art Conventionally, when contact failure occurs between the lamp base and the socket internal terminal due to poor lamp installation, the thermoplastic resin actuator melts, and the interlock contact opens and lights up. There was a fluorescent lamp socket in which the primary side of the circuit was turned off (for example, Japanese Patent Laid-Open No. 4-169084).

[0003]

However, this fluorescent lamp socket is provided with an interlock mechanism and cannot be applied to a fluorescent lamp socket having no interlock mechanism. Therefore, an object of the present invention is to provide a method for preventing abnormal heat generation of a fluorescent lamp socket and a fluorescent lamp socket that can prevent a serious accident from abnormal heat generation due to defective lamp mounting or the like without using an interlock mechanism. That is.

[0004]

A method for preventing abnormal heat generation of a fluorescent lamp socket according to claim 1 is a fluorescent lamp socket having a pair of pin receiving contacts for contacting a pair of lamp pins.
A method for preventing abnormal heat generation of a fluorescent lamp socket, which prevents abnormal heat generation caused by a poor contact between the lamp pin and the pin receiving contact, which is interposed between the pair of pin receiving contact and a bipolar charging portion having the same potential. It is characterized in that the insulator is melted due to abnormal heat generation to forcibly short-circuit the both-pole charging parts to stop abnormal heat generation.

According to another aspect of the present invention, there is provided a fluorescent lamp socket having a socket body, a thermoplastic resin plunger provided in the socket body so as to be able to move forward and backward and having a pair of lamp pin insertion holes, and a pair of lamp pins of the thermoplastic resin plunger. A pair of pin receiving contacts arranged inside the insertion hole, and a pair of compression coil springs for pressing the pair of pin receiving contacts against the thermoplastic resin plunger. On the contact side, a short-circuit piece that elastically contacts the other compression coil spring or the pin receiving contact is extended, and a short-circuit prevention portion that prevents a short circuit due to elastic contact of the short-circuit piece is provided inside the thermoplastic resin plunger. It is a projecting piece.

A fluorescent lamp socket according to a third aspect of the present invention includes a socket body, a thermoplastic resin plunger that is provided in the socket body so as to be movable back and forth and has a pair of lamp pin insertion holes, and a pair of lamp pins of the thermoplastic resin plunger. A pair of pin receiving contacts arranged inside the insertion hole, and a pair of compression coil springs for pressing the pair of pin receiving contacts against the thermoplastic resin plunger, the pins of the pair of compression coil springs. Short-circuit prevention for preventing the short-circuit by inclining the base end support portions of the pair of compression coil springs in directions facing each other so that the receiving contact side and one of the pair of pin receiving contacts contact each other and short-circuit. A portion is provided so as to project inside the thermoplastic resin plunger.

According to another aspect of the present invention, there is provided a fluorescent lamp socket, a socket body, an insulative plunger provided in the socket body so as to be able to move forward and backward and having a pair of lamp pin insertion holes, and inside the pair of lamp pin insertion holes of the insulative plunger. And a compression coil spring that presses the pair of pin receiving contacts against the insulating plunger, and is interposed between the compression coil spring and the pair of pin receiving contacts. And a spacer made of a thermoplastic resin.

According to a fifth aspect of the present invention, there is provided a fluorescent lamp socket including a socket body having a thermoplastic resin plunger having a pair of lamp pin insertion holes, and a pair of pin receiving contacts arranged inside the pair of lamp pin insertion holes. A pair of compression coil springs that press the pair of pin receiving contacts against the thermoplastic resin plunger, and short-circuit the pair of pin receiving contacts when the thermoplastic resin plunger melts; A conductor is embedded in a thermoplastic resin plunger.

[0009]

According to the method for preventing abnormal heat generation of the fluorescent lamp socket according to claim 1, when an arc is generated due to improper mounting of the lamp or the like and abnormal heat generation occurs, the insulator is melted and the charging portion having the same potential as the pin receiving contact. Therefore, the arc is stopped and abnormal heat generation can be stopped early.

According to the fluorescent lamp socket of the second aspect, when an arc is generated due to improper installation of the lamp or the like and abnormal heat is generated, the short-circuit preventing portion is melted and the prevention of the short-circuit piece is released. , The pin receiving contactor is short-circuited, the arc is stopped, and abnormal heat generation can be stopped early, and the shorting of the pair of pin receiving contactors makes the fluorescent lamp poor in restartability and difficult to light up. Therefore, it becomes easy to detect an abnormal state. Further, the structure is simple, and since a thermoplastic material is used, the moldability is good and the dimensional accuracy is good.

According to the fluorescent lamp socket of the third aspect, when the short-circuit preventing portion is melted due to a defective mounting of the lamp or the like, the pair of compression coil springs are inclined and phase short-circuited. According to the fluorescent lamp socket of the fourth aspect, when the thermoplastic resin spacer is melted due to a defective mounting of the lamp or the like, the pair of pin receiving contacts are short-circuited through the compression coil spring, and therefore, there is the same effect as the second aspect.

According to the fluorescent lamp socket of claim 5, the thermoplastic resin plunger is melted due to defective mounting of the lamp and the pair of pin receiving contacts are short-circuited via the conductor. There is.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. That is, 1 is a lamp pin, 2 is a pin receiving contact, and 3 is an insulator. First, a method of preventing abnormal heat generation of a fluorescent lamp socket is to prevent abnormal heat generation caused by a poor contact between the lamp pin 1 and the pin receiving contact 2 in a fluorescent lamp socket having a pair of pin receiving contacts 2 that contact the pair of lamp pins 1. To prevent. That is, the insulator 3 interposed between the pair of pin receiving contacts 2 and the compression coil spring 4 which is a bipolar charging portion having the same potential is melted due to abnormal heat generation, thereby forcing the compression coil spring 4 which is a bipolar charging portion. Short circuit to stop abnormal heat generation.

FIG. 3A shows a lighting circuit using a fluorescent lamp socket, 6 is a commercial power source, 7 is a ballast, 8 is a fluorescent lamp socket of this embodiment, 9 is a starting device, and 10 is a fluorescent lamp. is there. As described above, when the compression coil spring 4 is short-circuited, the pin receiving contactor 2 is short-circuited, so that the circuit shown in FIG.
And the lamp filament 1 of the fluorescent lamp 10
Since the current does not flow to 1 and the arc does not occur,
The abnormal heat generation stops and the fluorescent lamp 10 is turned off.

Therefore, when an arc is generated due to improper mounting of the lamp or the like and abnormal heat is generated, the insulator 3 is melted and the pin receiving contact 2 and the compression coil spring 4, which is a charging portion having the same potential, are short-circuited. Therefore, the arc stops and abnormal heat generation can be stopped early. The bipolar charging unit includes the pin receiving contact 2, but the charging unit is not limited to the compression coil spring and may be a lead wire connecting terminal or the like as long as the charging unit is in contact with the pin receiving contact 2.

Next, a fluorescent lamp socket to which the method for preventing abnormal heat generation is applied will be described. That is, this fluorescent lamp socket has a socket body 12, a plunger 13 made of a thermoplastic resin, a pin receiving contact 2, and a compression coil spring 4. The socket body 12 has a substantially cylindrical shape,
A cover 14 is attached to one end of the cover 14 with a mounting screw 15 and a hook 23.
And the thermoplastic resin plunger 13 from the other end.
Projecting freely. The cover 14 is formed with a hole (not shown) for passing the input / output electric wire 16, a pair of spring receiving portions 24, and a rotation preventing rib 25. Reference numeral 17 is a main body mounting portion.

The thermoplastic resin plunger 13 is provided in the socket body 12 so as to be movable back and forth and has a pair of lamp pin insertion holes 18. The thermoplastic resin plunger 13 of the embodiment has a cylindrical shape that is inserted into the socket body 12, has a lamp pin insertion hole 18 formed in the front end surface, and has a collar that prevents the socket body 12 from coming out at the outer peripheral edge of the rear end portion. 19 and the spring receiving portion 20 is formed on the inner surface.

The pair of pin receiving contacts 2 are arranged inside the pair of lamp pin insertion holes 18 of the thermoplastic resin plunger 13. In the embodiment, the lamp pin insertion hole 18
It is a substantially disk-shaped member located on the back side of the lamp pin, and a concave portion into which the tip of the lamp pin 1 is fitted is formed by bending the central portion of the H-shaped cut line 21 to the back surface side, and the protruding portion on the back surface side is spring-loaded. It is also used for.

The compression coil spring 4 presses the pair of pin receiving contacts 2 against the thermoplastic resin plunger 13. The compression coil spring 4 has conductivity, and both ends thereof are supported by the spring receivers 20 and 24 in a compressed state. in this case,
One end of the compression coil spring 4 and the thermoplastic resin plunger 1
3, a pin receiving contactor 2 is provided between the compression coil spring 4 and the terminal 3, and a terminal plate 5 is provided between the other end of the compression coil spring 4 and the spring receiver 24. The terminal plate 5 has a fitting hole 5a of the spring receiver 24 at one end and a quick-connect terminal portion 26 for quickly connecting the input / output line 16 at the other end.

Then, a short-circuit piece 22 that elastically contacts the other compression coil spring 4 is formed on the side of the pin receiving contact 2 of one compression coil spring 4, and the detent portion 27 is provided on the side opposite to the pin receiving contact 2. Is formed. The short-circuit piece 22 and the detent portion 27 are formed by extending the tip of the compression coil spring 4, and the detent portion 27 is locked to the detent rib 25. Further, the short-circuit piece 22 comes into contact with the other compression coil spring 4 and the rotation prevention portion 27 regulates the rotation of the compression coil spring 4. Therefore, when the short-circuit piece 22 is rotated in a direction away from the compression coil spring 4, The compression coil spring 4 of the short-circuit piece 22 applies a biasing force in the torsion direction.

The insulator 3 serves as a short circuit prevention portion for preventing a short circuit due to elastic contact of the short circuit piece 22, and is provided so as to project inside the thermoplastic resin plunger 13. By rotating the short-circuit piece 22 of the compression coil spring 4 away from the other compression coil springs 4, the short-circuit piece 22 is elastically locked to the insulator 3 in a state where a torsion force is generated in the compression coil spring 4. There is. Therefore, when the short-circuit piece 22 melts due to abnormal heat generation as shown in FIG. 1B, the short-circuit piece 22 comes into contact with another compression coil spring 4 due to the restoring force of the compression coil spring 4.

According to this embodiment, when an arc is generated due to improper mounting of the lamp and abnormal heat is generated, the insulator 3, which is the short-circuit preventing portion, melts as shown in FIGS. 1 (a) and 1 (b). Since the blocking of the short-circuit piece 22 is released, the short-circuit piece 22 short-circuits the compression coil springs 4 and the short-circuit piece 22 short-circuits the pair of pin receiving contacts 2 through the compression coil spring 4, which causes the arc to stop and abnormal heat generation. The fluorescent lamp 10 can be stopped early and the fluorescent lamp 10 is poor in restartability due to the short circuit of the pair of pin receiving contacts 2 and the fluorescent lamp 10 is hard to light, so that an abnormal state is easily detected. Further, the structure is simple, and since a thermoplastic material is used, the moldability is good and the dimensional accuracy is good.

The short-circuit piece 22 is the other compression coil spring 4
However, it may be in contact with the pressed pin receiving contact 2 of the other compression coil spring 4, or may be in contact with both the compression coil spring 4 and the pin receiving contact 2. . The second embodiment of the present invention is shown in FIGS. That is, in this fluorescent lamp socket, in the first embodiment, each compression coil spring 4 is provided with the short-circuit piece 22 and the rotation stop portion 27, and the short-circuit piece 22 is positioned so as to contact the compression coil spring 4 on the opposite side. In addition, the rotation stopper 27 of each compression coil spring 4 is covered with the cover 14
An insulator 3, which is a short-circuit blocking portion for locking the short-circuit piece 22 to prevent the short-circuit piece 22 from being short-circuited, is provided at a position to bias each short-circuit piece 22. Others are the same as those in the first embodiment.

According to this embodiment, since only one type of compression coil spring 4 can be used, it is not necessary to increase the number of parts, and short-circuit operation can be performed only for the poles that abnormally generate heat due to the arc. It is possible to prevent abnormal heat generation even earlier. Other than that, there are the same operational effects as the first embodiment. A third embodiment of the present invention is shown in FIGS. That is, in this fluorescent lamp socket, instead of the short-circuit piece 22 of the first embodiment, at least one of the pair of compression coil springs 4 on the pin receiving contact 2 side and the pair of pin receiving contact 2 contact each other. In order to make a short circuit, the base end support portions 24 'of the pair of compression coil springs 4 are inclined in the directions facing each other, and a short circuit prevention portion 3'for preventing a short circuit is provided so as to project inside the thermoplastic resin plunger 13. is there.

Also, the pin receiving contact 2 is integrally formed at one end of the conductive plate 30, and the terminal 5 is integrally formed at the other end of the conductive plate 30, which is also different from the first embodiment. Reference numeral 31 is an electric wire insertion hole provided in the socket body 12, and 34 is a screw hole of a mounting screw 15 for fitting the socket body 12 and the cover 14 together. In addition, the same parts as those in the first embodiment are designated by the same reference numerals.

According to this embodiment, when the short-circuit preventing portion 3'is melted as shown in FIG. 7 (b) due to the defective mounting of the lamp and the prevention by the short-circuit preventing portion 3'is released, the pair of compression coil springs 4 are formed. Tilts and shorts. Besides, there are the same effects as those of the first embodiment. A fourth embodiment of the present invention is shown in FIG. That is, this fluorescent lamp socket is provided with a socket body 12 and an insulative plunger 1 which is provided in the socket body 12 so as to be movable back and forth and has a pair of lamp pin insertion holes.
3'and a pair of pin receiving contacts 2 arranged inside the pair of lamp pin insertion holes of the insulating plunger 13 '.
And the pair of pin receiving contacts 2 with the insulating plunger 13 '.
Compression coil spring 4 that presses against
And a spacer 32 made of thermoplastic resin interposed between the pin receiving contact 2 and the pair of pin receiving contacts 2. The thermoplastic resin spacer 32 has an insulating partition 32a for partitioning the pair of pin receiving contacts 2 on one surface, and a spring receiving portion 32b for receiving the compression coil spring 4 on the other surface. The insulative plunger 13 'is movably supported in a hole of the cover 14 that closes the front opening of the socket body 12.

The other common parts are the same as in the first or third embodiment. According to this embodiment, when the thermoplastic resin spacer 32 is melted due to poor mounting of the lamp or the like, the pair of pin receiving contacts 2 are compressed by the compression coil spring 4.
Since it is short-circuited through, there is the same effect as the first embodiment. Further, in this embodiment, since the compression coil spring 4 is one, the assembling can be facilitated and the cost can be reduced. Socket body 1 made of thermoplastic resin
2 and the thermoplastic resin spacer 32 to the compression coil spring 4
Since both ends can be fixed, it is not necessary to provide a positioning structure for the compression coil spring 4 on the conductive plate 30 which is a metal part, and the mold structure of the metal part is facilitated, so that the cost can be reduced.

A fifth embodiment of the present invention is shown in FIGS.
It is shown in FIG. That is, in this fluorescent lamp socket, instead of the thermoplastic resin spacer 32 of the fourth embodiment, when the thermoplastic resin plunger 13 is melted, the pair of pin receiving contacts 2 is short-circuited with the thermoplastic resin. Made plunger 1
3 has a conductor 33 embedded therein. The conductor 33 is made of copper, copper alloy, aluminum, iron or the like, and is inserted into the thermoplastic resin plunger 13 by insert molding, as shown in FIG.
It is buried like. The conductor 33 has a hole corresponding to the lamp pin insertion hole 18, and the lamp pin insertion hole 18 is formed so that the inner surface of the hole is also covered with resin.

The socket body 12 and the cover 14 are made of thermoplastic resin. According to this embodiment, the plunger 13 of the thermoplastic resin socket body 12 is melted due to poor mounting of the lamp and the pair of pin receiving contacts 2 are short-circuited via the conductor 33. That is, when a contact failure occurs between the tip of the lamp pin 1 and the pin receiving contact 2 and an arc or the like occurs to cause abnormal heat generation, this heat melts the resin of the thermoplastic resin plunger 13 closest to the heat generating portion, Therefore, as shown in FIG. 11, when the conductor 33 is exposed and the cover 14 is thermally deformed through the compression coil spring 4 and loses the holding force for the compression coil spring 4, the lamp pin 1 is inserted by the weight of the fluorescent lamp 10. The lamp pin 1 comes down in the hole 18 and comes into contact with the conductor 33 to be in a short circuit state. As a result, since the arc discharge can be stopped, it is possible to prevent an accident in which the entire fluorescent lamp socket is burned, the thermoplastic resin plunger 13 does not burn, and the ignition of other resin materials can be prevented. Therefore, the danger of the fluorescent lamp 10 falling can be avoided. In addition, the thermoplastic resin plunger 13 that is most likely to catch fire
Since it is possible to reduce the amount of the flammable resin material used, it is easy to prevent the risk of burning in the vicinity through the thermoplastic resin plunger 13.

In this embodiment, the socket body 1
2 and the thermoplastic resin plunger 13 were separate bodies,
It may be one.

[0031]

According to the method for preventing abnormal heat generation of the fluorescent lamp socket according to the first aspect of the present invention, when an arc is generated due to improper mounting of the lamp or the like and abnormal heat is generated, the insulator is melted to have the same potential as the pin receiving contact. There is an effect that the charging parts are short-circuited, the arc is stopped, and abnormal heat generation can be stopped early.

According to the fluorescent lamp socket of the second aspect, when an arc is generated due to defective mounting of the lamp or the like and abnormal heat is generated, the short-circuit preventing portion is melted and the prevention of the short-circuit piece is released. , The pin receiving contactor is short-circuited, the arc is stopped, and abnormal heat generation can be stopped early, and the shorting of the pair of pin receiving contactors makes the fluorescent lamp poor in restartability and difficult to light up. Therefore, it becomes easy to detect an abnormal state. Further, the structure is simple, and since a thermoplastic material is used, the moldability is good and the dimensional accuracy is good.

According to the fluorescent lamp socket of the third aspect, when the short-circuit preventing portion is melted due to a defective mounting of the lamp or the like, the pair of compression coil springs are inclined and phase short-circuited. According to the fluorescent lamp socket of the fourth aspect, when the thermoplastic resin spacer is melted due to poor mounting of the lamp or the like, the pair of pin receiving contacts are short-circuited through the compression coil spring, and therefore, the same effect as the second aspect is provided.

According to the fluorescent lamp socket of claim 5, the thermoplastic resin plunger is melted due to defective mounting of the lamp and the pair of pin receiving contacts are short-circuited via the conductor. There is.

[Brief description of drawings]

FIG. 1 is a back view for explaining the short-circuit operation of the first embodiment of the present invention, in a state where the socket cover is removed and the socket body is viewed from the back side.

FIG. 2 is an exploded perspective view.

FIG. 3 is a lighting circuit diagram illustrating a short-circuit operation at the time of abnormal heat generation.

FIG. 4 is an exploded perspective view of a second embodiment.

FIG. 5 is a rear view for explaining a short-circuited state in which the socket cover is removed and the socket body is viewed from the back side.

FIG. 6 is an exploded perspective view of a third embodiment.

FIG. 7 is a cross-sectional view illustrating a short-circuit operation at the time of abnormal heat generation.

FIG. 8 is an exploded perspective view of a fourth embodiment.

FIG. 9 is an exploded perspective view of a fifth embodiment.

FIG. 10 is a sectional view of the plunger.

FIG. 11 is an explanatory diagram of the short-circuited state.

[Explanation of symbols]

 1 Lamp pin 2 Pin receiving contactor 3 Insulator that serves as a short circuit prevention part 4 Compression coil spring that constitutes the bipolar charging part 12 Socket body 18 Lamp pin insertion hole 22 Shorting piece

Claims (5)

[Claims] 1. A fluorescent lamp socket having a pair of pin receiving contacts for contacting a pair of lamp pins, wherein abnormal heating of the fluorescent lamp socket prevents abnormal heating that occurs due to poor contact between the lamp pins and the pin receiving contacts. A method of preventing, by melting the insulator interposed between the pair of pin receiving contacts and the charging parts of the same polarity of both poles due to abnormal heat generation, forcibly short-circuiting the bipolar charging parts to cause abnormal heat generation. A method for preventing abnormal heat generation in a fluorescent lamp socket, which is characterized by stopping. 2. A socket body, a thermoplastic resin plunger provided in the socket body so as to be capable of advancing and retracting and having a pair of lamp pin insertion holes, and arranged inside the pair of lamp pin insertion holes of the thermoplastic resin plunger. A pair of pin receiving contacts, and a pair of compression coil springs that press the pair of pin receiving contacts against the thermoplastic resin plunger. Fluorescent light having a short-circuit piece extending elastically contacting at least one of the compression coil spring and the pin receiving contact, and a short-circuit preventing portion for preventing a short circuit due to the elastic contact of the short-circuit piece protruding inside the thermoplastic resin plunger. Light socket. 3. A socket body, a thermoplastic resin plunger provided in the socket body so as to be capable of advancing and retracting and having a pair of lamp pin insertion holes, and arranged inside the pair of lamp pin insertion holes of the thermoplastic resin plunger. A pair of pin receiving contacts, and a pair of compression coil springs that press the pair of pin receiving contacts against the thermoplastic resin plunger, the pin receiving contact side of the pair of compression coil springs, and the pair of compression coil springs. Of the pair of compression coil springs are tilted in directions facing each other such that one of the pin receiving contacts of the thermoplastic resin is made of the thermoplastic resin. Fluorescent lamp socket protruding inside the plunger. 4. A socket body, an insulative plunger provided in the socket body so as to be able to move forward and backward and having a pair of lamp pin insertion holes, and a pair of pins arranged inside the pair of lamp pin insertion holes of the insulative plunger. A receiving contact, a compression coil spring for pressing the pair of pin receiving contacts against the insulating plunger, and a thermoplastic resin spacer interposed between the compression coil spring and the pair of pin receiving contacts. Fluorescent lamp socket equipped. 5. A socket body having a thermoplastic resin plunger having a pair of lamp pin insertion holes, a pair of pin receiving contacts arranged inside the pair of lamp pin inserting holes, and a pair of pin receiving contacts. And a pair of compression coil springs for pressing the thermoplastic resin plunger to electrically short-circuit the thermoplastic resin plunger so as to short-circuit the pair of pin receiving contacts when the thermoplastic resin plunger melts. A fluorescent lamp socket with a buried body.