JP2002367743A - Lamp socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To structure so as to avoid socket damage even in case of a half- contact of a socket lamp pin with a socket electrode by making the lamp socket transparent. SOLUTION: The lamp socket into which a lamp pin of a lamp is inserted is provided with a translucent socket case, a socket electrode inserted into the socket and for inserting the lamp pin, and heat-resistant resin or tracking- resistant resin arranged between the socket case and the socket electrode. The heat-resistant resin or the tracking-resistant resin is either of a cylindrical shape with a part cut off covering the surroundings of the socket electrode or of a film form communicating with 2-pin of the lamp pin.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluorescent lamp socket, and more particularly, to a fluorescent lamp socket in which the safety of a fluorescent lamp inserted in the socket is ensured.

[0002]

2. Description of the Related Art Products are displayed on display shelves in department stores, supermarkets and the like by fluorescent lamps of lighting devices. In particular, a refrigerator case shelf is illuminated by a long and narrow fluorescent lamp.

[0003] In the case of a commercially available straight type fluorescent lamp, when inserting into a predetermined double-ended socket, one end of a fluorescent lamp electrode is inserted into one socket insertion hole, and the other fluorescent lamp electrode is inserted into the other insertion hole. By the insertion, both ends of the fluorescent lamp are pressed by the spring, and the electrodes at both ends are reliably inserted into the socket holes at both ends and connected to the electrodes in the socket holes.

On the other hand, in the case of an illuminating fluorescent lamp for a refrigerated case, the refrigerated lamp socket has a structure shown in FIG. 4, so that it is difficult to mount the fluorescent lamp, and the electrode pins of the lamp are connected to the terminal portions of the socket. It may be in a semi-contact state that does not completely enter.

In the lamp socket shown in FIG. 4, reference numeral 11 denotes a translucent lamp socket holder, which is formed of silicone rubber, reference numeral 12 denotes a socket body, which is made of polyphenylene ether resin, reference numeral 13 denotes a lead wire, and reference numeral 14 denotes a lead wire.
Is a waterproof connector, which is made of an olefin-based elastomer. Reference numeral 15 denotes a socket electrode hole, which is provided with a spring function in which the socket electrode can be inserted when the lamp pin is mounted. The lamp socket of FIG. 4 is arranged at both ends of the lamp to be mounted, and is disposed at a position where the lamp is mounted for the refrigerator case, and the lamp sockets are respectively fitted to the lamp pins of the lamp.

Further, when the lamp is mounted in the lamp socket, even if the lamp is initially mounted, a half-contact state between the lamp pin and the socket electrode is caused by vibration of the refrigeration case or vibration by opening and closing the refrigeration case door. In some cases. When the power is turned on and illuminated in this semi-contact state,
When a secondary voltage of the ballast is applied to the socket terminal and the head of the pin of the lamp, an arc discharge occurs.

[0007] The heat of the arc discharge carbonizes the socket body near the socket terminal, and the carbonization proceeds, causing a problem that the socket is damaged. In particular, due to arc discharge, carbonization near the socket electrode and softening due to heat cause deformation around the socket electrode part,
The spring elasticity sandwiched by the socket electrode itself also deteriorates, and arc discharge progresses, which may further deteriorate.

[0008]

The problem with the structure of the lamp socket for a refrigerator case is that the resin used for the socket is made transparent so that it can be confirmed that the lamp pin has been completely attached to the socket terminal. The purpose of this is to make it possible to confirm the quality of the mounting, and to prevent half-contact during mounting. Poniphenylene ether resin is used as the transparent resin. This resin makes the position of the socket electrode visually visible, and is inexpensive in material.
Since it can be molded to a certain degree as a mold, it is effective as a socket resin.

However, the socket resin made transparent alone cannot completely prevent the socket from being damaged due to semi-contact. Therefore, it is necessary to provide a structure in which the socket is not damaged even when the semi-contact occurs.

[0010]

According to the present invention, in order to prevent the above-mentioned damage to the socket, in a lamp socket for mounting an electrode pin of a lamp, a lamp socket case is made translucent and the socket electrode is elastically connected to the electrode pin. And an anti-carbonization film such as polytetrafluoroethylene resin is interposed between the socket electrode and the lamp socket case.

According to the present invention, there is provided a lamp socket for inserting a lamp pin of a lamp, comprising: a translucent socket case;
A socket electrode which is inserted into the socket case and into which the lamp pin is inserted, and a heat-resistant resin disposed between the socket case and the socket electrode are provided.

According to the present invention, a lamp socket for inserting a lamp pin of a lamp includes a translucent socket case,
A socket electrode that is inserted into the socket case and into which the lamp pin is inserted, and includes a heat-resistant resin or a tracking-resistant resin disposed between the socket case and the socket electrode, wherein the heat-resistant resin or the tracking-resistant resin is It is characterized in that it has a cylindrical shape in which a part covering the periphery of the socket electrode is cut or a film shape which communicates with two of the lamp pins.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments according to the present invention will be described.
This will be described in detail with reference to the drawings.

[First Embodiment] FIG. 1 shows a structural view of a lamp socket according to a first embodiment of the present invention. In the lamp socket of FIG. 1, reference numeral 1 denotes a socket electrode having elasticity for sandwiching the lamp pin of the base pin of the lamp, 2 denotes polytetrafluoroethylene having a shape covering the socket electrode 1,
The anti-carbonization film is made of a heat-resistant resin such as a silicone resin or a urea resin or a tracking-resistant resin. The anti-carbonization film has a tube shape and has a cut portion to facilitate insertion of the socket electrode. Reference numeral 3 denotes a translucent socket case in which the mounting state of a socket electrode such as poniphenylene ether resin and a lamp pin can be visually recognized. Reference numeral 4 denotes a socket cover for fixing the position after the socket electrode 1 is fitted into the socket case 3 provided with the heat-resistant resin 2, reference numeral 5 denotes a cable fused to the socket electrode 1 and taken out, and reference numeral 6 denotes a cable. A socket cover which is fitted into the lamp socket 3 and fixedly contacts the lamp.

Here, as the heat resistant resin of the carbonization preventing film,
A polymer material is a material that withstands a change in its original properties due to softening due to micro-Brownian motion of the main chain or breakage and deterioration of the molecular chain when heated, and chemical heat resistance accompanied by chemical change and reversible physical change In this embodiment, processability, transparency and low cost are required, and fluorine-based and silicon-based polymers have high chemical heat resistance but are slightly inferior in physical heat resistance, but can be used. Aromatic or heterocyclic polymers may be used, and specifically, polytetrafluoroethylene, silicone resin, polyimides, aromatic polyamides, polyesters, graphite, silicon carbide, and the like may be used.

When the surface of an organic insulating material is exposed to an aerial arc discharge, thermal dissociation occurs due to the high temperature of the arc to release carbon, and the carbon is transferred to a conductive path on the surface of the material. A material that resists the phenomenon of forming insulation and deteriorating insulation properties, urea resin does not release carbon,
Since it diverges as a gas, it is a tracking resistant resin. Further, when an inorganic filler is added to the polymer material, the tracking property is hardly generated. In the present embodiment, the urea resin (urea resin) produced by reacting urea with formaldehyde is also a thermosetting resin, and may be a resin obtained by co-polycondensation with addition of melamine and phenol.

As shown in FIG. 3, when a lamp 8 having a lamp fixture 9 and a lamp pin 11 is mounted on both ends of a long cylindrical lamp 8 as shown in FIG.
The lamp pin 11 is inserted into the socket electrode 1 of the lamp socket. After insertion, fix the lamp in place.

After the power is supplied to the cable after fixing, a ballast 10 and a high voltage are supplied to the lamp pin 11 via the socket electrode 1 by the excitation of the choke coil, and a discharge occurs in the lamp. Maintain voltage to ballast 10
, The lamp 8 emits normal illumination light.

Since the socket body resin near the terminals of the socket electrode 1 is carbonized by the arc discharge generated due to the semi-contact between the base pin 11 of the lamp 8 and the socket electrode 1, the heat-resistant resin Alternatively, the socket can be prevented from being damaged by being mounted separately from the socket resin near the socket electrode 1 via the anti-carbonization film of the tracking resistant resin. However, there is a problem that it is difficult for the base pin 11 of the lamp to enter the terminal portion of the socket electrode 1. Therefore, by mounting a carbonization preventing film 2 made of a heat-resistant resin or a tracking-resistant resin (for example, a silicone resin, a urea resin, a polytetrafluoroethylene resin, etc.) in a socket hole at a portion of the socket electrode, even if an arc discharge occurs. Even so, it is possible to prevent carbonization and spread of the fire, thereby preventing damage to the socket without causing damage to the socket.

[Second Embodiment] A lamp socket according to a second embodiment of the present invention will be described with reference to FIG. In FIG. 2, portions denoted by the same reference numerals as those in FIG. 1 have the same functions. Reference numeral 7 shown in FIG. 2 denotes a heat-resistant resin or a tracking-resistant resin such as polytetrafluoroethylene, a silicone resin, and a urea resin, and the shape thereof is an oval shape or an ellipse communicating with the two socket electrode 1 electrode holes. Film shape. The socket electrode 1 is directly and elastically mounted in the cylindrical hole of the socket case 3, and is covered with the socket cover 4 after the mounting.

When a lamp having lamp pins at both ends of a long cylindrical shape is mounted on the lamp socket of this embodiment, the lamp pin of the base is inserted into the electrode hole for the socket electrode 1 of the lamp socket. After insertion, fix the lamp in place.

When the power is supplied to the cable after fixing the lamp, a high voltage is supplied to the lamp pin via the socket electrode by excitation of a choke coil built in the lamp drive circuit separately, and ultraviolet discharge occurs in the lamp. Then, the gas discharge in the lamp is started, and the sustain voltage is supplied thereafter, so that the lamp continues to emit the illumination light.

Here, since the semi-contact between the base of the lamp and the socket electrode causes arc discharge generated between the socket electrode and the lamp pin, the resin of the socket body near the terminal portion of the socket electrode 1 is carbonized. By providing a heat-resistant resin in the socket case resin near the socket electrode, the socket can be prevented from being damaged. By mounting a film of a heat-resistant resin or a tracking-resistant resin (for example, a silicone resin, a urea resin, a polytetrafluoroethylene resin, or the like) in a socket hole of the socket electrode portion, even if an arc discharge occurs, The socket can be prevented from being damaged without damaging the socket.

As shown in the above-described embodiment, it is sufficient that a heat-resistant resin or a tracking-resistant resin is mounted around the terminal of the socket electrode 1. This method is effective not only for refrigeration sockets, but also as a countermeasure against socket damage due to semi-contact. If other sockets, for example, the sockets are not fixed, the reliability of the insertion of the socket electrode into the lamp cap pins is reduced. It is effective when the property is low.

The shape of the lamp is not limited, and may be linear or circular, such as a fluorescent lamp that is linear in the tube length direction, a fluorescent lamp for illuminating a display shelf or a backlight for a liquid crystal display. In other words, even if the lamp socket has only one base pin, the base pin and the socket electrode may be in a semi-contact state, which may cause an arc discharge, so that the present invention can be applied.

[0026]

EXAMPLE Next, the results of a test by arc discharge performed by forcibly forming a semi-contact state between the socket electrode and the lamp pin will be described. As a result, by the treatment according to the above embodiment, the occurrence of carbonization near the socket terminal can be prevented,
An example in which the problem of damaging the socket did not occur.

As an example, the lamp is FLR180T6
The ballast including W (diameter of lamp tube φ20, tube length 180mm) and choke coil was AM-11U (secondary voltage 550V,
(Secondary current: 350 mA), and the results shown in Table 1 below were obtained using the current socket and the improved socket using a polytetrafluoroethylene resin as the heat-resistant resin.

[0028]

[Table 1] Here, ○ indicates no damage to the socket, and X indicates damage to the socket.

As for the damage to the socket, phenomena such as deformation due to melting of the socket case around the socket electrode and deformation and blackening of the socket case around the socket electrode were observed.

As described above, by providing the heat-resistant resin around the socket electrode according to the present invention, the socket case around the socket electrode is not deformed, does not cause thermal spread, and is thermally safe. I found it.

In the above embodiment, the heat-resistant resin or the tracking-resistant resin is provided. However, this material is insulative, and its thermal conductivity is not particularly studied. Can also be expected to be effective.

Further, in the above embodiment, a tube-shaped tube in which the carbonization preventing film is partially cut in the length direction, an oval or elliptical film film which is connected to the lamp pin hole and surrounds the lamp pin, Even if it is a translucent embedded anti-carbonization material that is shaped by a mold and embedded in the socket electrode hole of the lamp socket to prevent arc discharge,
Similar effects can be obtained.

[0033]

According to the present invention, damage to the socket can be prevented by providing a heat-resistant resin or a tracking-resistant resin between the socket case and the socket electrode.

[Brief description of the drawings]

FIG. 1 is a structural view of a lamp socket of the present invention.

FIG. 2 is a structural view of a lamp socket of the present invention.

FIG. 3 is a conceptual view illustrating a combination of a lamp and a lamp socket according to the present invention.

FIG. 4 is a structural view of a conventional lamp socket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket electrode 2 Anti-carbonization material of heat-resistant resin or tracking-resistant resin 3 Socket case 4 Socket lid 5 Cable 6 Socket cover 7 Anti-carbonization material of heat-resistant resin or tracking-resistant resin 8 Lamp 9 Lamp fixture 10 Ballast 11 Lamp pin (base pin)

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5E021 FA03 FA08 FA16 FC06 FC38 JA05 JA20 KA02 5E024 BB06 BB10 5E087 EE04 EE07 EE13 FF07 HH01 QQ05 RR07 RR26 RR34

Claims (2)

[Claims] 1. A lamp socket for inserting a lamp pin of a lamp, a translucent socket case, a socket electrode inserted into the socket case and inserting the lamp pin, and disposed between the socket case and the socket electrode. A lamp socket comprising a heat-resistant resin or an anti-carbonizing material of a tracking-resistant resin. 2. A lamp socket for inserting a lamp pin of a lamp, comprising: a translucent socket case; a socket electrode inserted into the socket case, wherein the lamp pin is inserted; and a socket electrode disposed between the socket case and the socket electrode. A heat-resistant resin or an anti-carbonizing material of a tracking-resistant resin, wherein the anti-carbonizing material of the heat-resistant resin or the anti-tracking resin covers the periphery of the socket electrode and is partially cut into a cylindrical shape or a two-pin lamp pin. A lamp socket having a film shape communicating with the lamp socket or a buried shape buried in the socket electrode direction.