JPH08115778A - Fluorescent lamp socket and abnormal heat generation preventive method of the socket - Google Patents

Abstract

PURPOSE: To prevent a trouble following abnormal heat generation due to lamp installation failure without using an interlock mechanism by releasing electric communication condition of pin receptacle contactors by melting a thermally fusible member at the time of abnormal heat generation. CONSTITUTION: A fluorescent lamp socket has a socket case 6, an electric wire connection terminal 7, and a releasing means 8 besides pin receptacle contacts 3, 4 and a thermally fusable member 5. Electric application condition to lamp pins 1, 2 of the contactors 3, 4 is kept by the thermally fusable member 5 and the thermally fusable member 5 is fused by abnormal heat generation to release electric application. When the thermally fusable member 5 is fused by abnormal heat generation, a conductive plate 27 comes off from a connection part 23 due to spring force of the conductive plate 27 and thus electric connection between the conductive plate 27 and the connection part 23 can be cut.

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 a contact failure occurs between the lamp base and the socket internal terminal due to a defective mounting of the lamp, the thermoplastic resin actuator is melted, which causes the interlock contact to open and the lighting circuit. There was a fluorescent lamp socket whose primary side 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 of preventing abnormal heat generation of a fluorescent lamp socket, which prevents abnormal heat generation caused by poor contact between a lamp pin and a pin receiving contact, wherein a heat-fusible member maintains a current-carrying state of the pin receiving contact to the lamp pin. The heat-soluble member is melted by the abnormal heat generation to release the energized state.

According to another aspect of the present invention, in a fluorescent lamp socket, a pin receiving contact for contacting a lamp pin of a fluorescent lamp, an electric wire connecting terminal connected to the pin receiving contact, and an abnormal heat generation of the pin receiving contact are received. The heat-fusible member is melted by melting, and the opening means for opening the electrical connection between the lamp pin and the wire connection terminal by melting the heat-fusible member.

According to a third aspect of the present invention, in the fluorescent lamp socket according to the second aspect, the opening means is provided in the electric wire connecting terminal and is provided with a spring force in a direction away from the connecting portion of the pin receiving contact. The heat-fusible member is configured by a plate and electrically and mechanically connects the connecting portion and the conductive plate against the spring force of the conductive plate.

A fluorescent lamp socket according to a fourth aspect of the present invention is the fluorescent lamp socket according to the second aspect, wherein the pin receiving contact is housed in a socket case, and the socket case has a lamp pin insertion hole for inserting a lamp pin and the pin receiving contact. A spring for pressing the lamp pin is housed, and the opening means has an actuating member engageable with the front side of the pin receiving contact, and an actuating member having a spring force stronger than that of the spring and facing the spring. The heat-fusible member fixes the actuating member to the socket case so that the pin receiving contact contacts the lamp pin.

A fluorescent lamp socket according to a fifth aspect of the present invention is the fluorescent lamp socket according to the second aspect, wherein the opening means and the heat-fusible member also serve as the pin receiving contact. The fluorescent lamp socket according to claim 6 has a spring for pressing the pin receiving contact to the lamp pin according to claim 2, wherein the heat-fusible member has a predetermined length and is in contact with the spring. The opening means is interposed between the pin and the pin receiving contact, and is separated from the lamp pin by being connected to the pin receiving contact and the stopper that locks the spring on the pin receiving contact side of the spring elastically generated by melting of the heat-soluble member. And a conductive plate of the electric wire connection terminal that is biased in a direction with a force smaller than that of the spring.

According to a seventh aspect of the present invention, in the fluorescent lamp socket according to the second aspect, the opening means is provided in the electric wire connecting terminal and is provided with a spring force in a direction away from the connecting portion of the pin receiving contact. The fusible member is formed of a plate and also serves as a spring that has a better spring force than the conductive plate and presses the pin receiving contact against the lamp pin.

The fluorescent lamp socket according to claim 8 is the fluorescent lamp socket according to claim 2, wherein the pin receiving contact is housed in a socket case, and the socket case has a lamp pin insertion hole for inserting a lamp pin and a spring receiver. A spring for pressing the lamp pin is housed between the pin receiving contact and the spring receiver, and the opening means is provided in the electric wire connecting terminal and is provided with a spring force in a direction away from the connecting portion of the pin receiving contact. The heat-fusible member is also used as the spring receiver.

[0011]

According to the method for preventing abnormal heat generation of the fluorescent lamp socket of claim 1, power is supplied to the lamp pin from the pin receiving contact of the fluorescent lamp socket, but when abnormal heat is generated due to poor contact between the lamp pin and the pin receiving contact, Since the heat-fusible member is melted and the energized state of the pin receiving contact is released, a serious accident can be prevented. Moreover, no interlock mechanism is used.

According to the fluorescent lamp socket of the second aspect, when the heat-fusible member melts due to abnormal heat generation, the opening means opens the space between the lamp pin and the wire connection terminal, so that the current supply to the lamp pin is stopped and an arc or the like is generated. The abnormality stops early and the lamp cannot be relighted, so it is easy to understand the abnormality. According to the fluorescent lamp socket of the third aspect, when the heat-fusible member melts due to abnormal heat generation, the conductive plate is separated from the connecting portion of the pin receiving contact by the spring action of the conductive plate. There is.

According to the fluorescent lamp socket of the fourth aspect, when the heat-fusible member melts due to abnormal heat generation, the actuating member pushes the pin receiving contact against the spring by the spring force of the opening spring. Since the receiving contact is separated from the lamp pin, there is the same effect as in claim 2. According to the fluorescent lamp socket of claim 5, when the pin receiving contact serving also as the opening means and the heat-fusible member melts due to abnormal heat generation, it flows down by its own weight and the lamp pin and the wire connection terminal are separated. In addition to having the same action as 2, the structure is simplified,
Further, since the pin receiving contact has the highest temperature due to abnormal heat generation and melts at an early stage, thermal deformation of other members such as the socket case is hard to occur.

According to the fluorescent lamp socket of the sixth aspect, when the heat-fusible member melts due to abnormal heat generation, the spring restores to the stopper, and the pin receiving contact also elastically deforms in a direction approaching the stopper, and the pin. Since the receiving contact is separated from the lamp pin, there is the same effect as in claim 2. According to the fluorescent lamp socket of claim 7, when the spring, which is a heat-fusible member, is melted due to abnormal heat generation, the pin receiving contact is separated from the lamp pin by the spring force of the conductive plate. Besides, the structure is simple.

According to the fluorescent lamp socket of the eighth aspect, when the spring bearing, which is a heat-fusible member, melts due to abnormal heat generation,
Since the pin receiving contact moves away from the lamp pin by the spring force of the conductive plate, there is the same effect as in claim 2, and the structure is simplified.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the method of preventing abnormal heat generation of the fluorescent lamp socket is as follows. In the fluorescent lamp socket having a pair of pin receiving contacts 3 and 4 that come into contact with the pair of lamp pins 1 and 2, This is to prevent abnormal heat generation due to poor contact with the contacts 3 and 4. That is, the lamp pins 1 of the pin receiving contacts 3 and 4
The energized state to 2 is maintained by the heat-fusible member 5, and the heat-fusible member 5 is melted by abnormal heat generation to release the energized state.

FIG. 2 shows a lighting circuit to which this abnormal heat generation preventing method is applied. 28 is a commercial power source, 29 is a ballast, 30 is a starting device, 31 and 32 are fluorescent lamp sockets, and 33 is a fluorescent lamp. The melting of the heat-fusible member 5 opens the connection of the fluorescent lamp socket 31, prevents the generation of an arc due to a poor contact between the lamp pins 1 and 2 and the pin receiving contacts 3 and 4, and stops abnormal heat generation due to the arc, and the lamp 33. Turns off.

In FIG. 1, the fluorescent lamp socket to which the method of preventing abnormal heat generation is applied, in addition to the pin receiving contacts 3 and 4 and the heat-fusible member 5, has a socket case 6, an electric wire connecting terminal 7, and an opening means 8. The socket case 6 is composed of a body 9 and a cover 10 formed of a thermoplastic resin. The body 9 has a substantially box shape having an opening on the back surface, and a plunger 11 made of a thermoplastic resin is provided at the upper end so as to move back and forth.
Form the terminal housing 12 and the wire insertion hole 13 at the lower end,
Mounting grooves 14 are formed on both sides of the lower end, positioning press-fitting protrusions 15 project from the back surface, and a screw insertion hole 16 is formed in the middle of the body 9. Reference numeral 17 is a lamp pin insertion hole of the plunger 11. The cover 10 closes the opening of the body 9, has a fitting hole 18 into which the press-fitting projection 15 is press-fitted, forms a groove 14 ′ that matches the mounting groove 14, and forms a screw hole 19 that matches the screw insertion hole 16. Forming the plunger 11
Spring holder 20 at a position aligned with the lamp pin insertion hole 17 of
Is formed. The cover 10 closes the opening of the body 9,
The cover 10 is connected to the body 9 by fitting the press-fitting projection 15 into the press-fitting hole 18, inserting the mounting screw 21 into the screw insertion hole 16 and screwing it into the screw hole 19.

The pin receiving contacts 3 and 4 are provided on the plunger 11.
Lamp pins 1 and 2 inserted into the lamp pin insertion holes 17 of
Has a contact portion 22 facing the lamp pins 1 and 2 and a connecting portion 23 extending from the contact portion 22, and the tip of the lamp pins 1 and 2 can be fitted into the contact portion 22. The portion 24 is formed by bending a facing piece, which is divided by an H-shaped cut line, backward. A mounting hole 25 for mounting the heat-fusible member 5 is formed in the connection portion 23. Further, one end of the spring 35, which is a coil spring in the embodiment, is locked to the spring receiver 20, and the other end of the spring 35 is formed on the back surface side by the facing piece that forms the hole 24 of the pin receiving contacts 3 and 4. The pin receiving contacts 3 and 4 are engaged with the protrusions by the spring force of the spring 35, and the lamp pin insertion hole 1 of the plunger 11 is inserted.
7 is pressed against the rear surface side, whereby the plunger 11 is projected from the body 9 by the maximum amount.

The electric wire connecting terminal 7 includes the pin receiving contacts 3 and 4.
In the embodiment, it is composed of a quick-connecting terminal portion 26 and a conductive plate 27 integrally formed with the quick-connecting terminal portion 26 and having a spring property. The quick-connect terminal portion 26 is housed in the terminal housing portion 12, positioned and fixed, and fast-connects an electric wire (not shown) inserted in the electric wire insertion hole 13. The conductive plate 27 is bent into a substantially L-shape and has a hole 28 formed at the tip thereof which is aligned with the mounting hole 25 of the connecting portion 23.

The heat-fusible member 5 melts due to abnormal heat generation, and is an insulator made of thermoplastic resin in the embodiment. The heat-fusible member 5 is passed through the attachment hole 25 of the connection portion 23 and the hole 28 of the conductive plate 27 in a state where the connection portion 23 and the conductive plate 27 are overlapped with each other so as to be in contact with each other. The conductive plates 27 are integrally phase-coupled to each other, and the heat-fusible member 5 is used to connect the connecting portions 23 and the conductive plates 27.
Maintains an electrical and mechanical connection with. The melting temperature of the heat-soluble member 5 is set lower than the melting temperatures of the socket case 6 and the plunger 11.

The opening means 8 is a forced opening means for forcibly opening the connection between the lamp pins 1 and 2 and the wire connection terminal 7 by melting the heat-fusible member 5, but in the embodiment, it is a conductive plate 27 having a spring property. I also use it. That is, when the heat-fusible member 5 melts due to abnormal heat generation, the spring force of the conductive plate 27 separates the conductive plate 27 from the connecting portion 23, so that the conductive plate 2
The electrical connection between 7 and the connecting portion 23 is cut off.

FIG. 3A shows the assembled state of the fluorescent lamp socket, in which the pin receiving contacts 3 and 4 are elastically pressed against the inner surface of the plunger 11 by the spring property of the spring 35 and the conductive plate 23, and the plunger 11 becomes a body. A collar 34 projecting from 9 engages with the body 9 and projects to the maximum position. In FIG. 3B, the lamp pins 1 and 2 of the fluorescent lamp are attached to the plunger 11
The lamp pin is inserted into the lamp pin insertion hole 17. At this time, the lamp pins 1 and 2 are inserted into the lamp pin insertion holes 17 to hold the plunger 11 and
The tip of 2 presses the pin receiving contact 4 to compress the spring 35 and elastically deform the conductive plate 27. By these spring forces, a contact pressure is obtained between the lamp pins 1 and 2 and the pin receiving contacts 3 and 4, and the electric resistance of the contact surfaces of both is reduced. The flange 34 of the plunger 11 is stopped by locking the collar 34 to the inner surface of the body 9.

FIG. 3C shows a poor contact state between the lamp pin 2 and the pin receiving contact 4. At this time, a contact failure occurs between the lamp pins 1 and 2 and the pin receiving contacts 3 and 4, an arc is generated, and the pin receiving contacts 3 and 4 become high in temperature,
The caulking portion of the heat-soluble member 5 is melted and the pin receiving contact 3,
4 and the conductive plate 27 are opened by the spring force of the conductive plate 27, whereby the electrical connection is released, the pin receiving contacts 3, 4 are not energized, and the lamp pin 1,
The arc between 2 and the pin receiving contacts 3 and 4 stops, and abnormal heat generation disappears.

According to this embodiment, power is supplied to the lamp pins 1 and 2 from the pin receiving contacts 3 and 4 of the fluorescent lamp socket, but the lamp pins 1 and 2 and the pin receiving contacts 3 and 4 are not properly contacted to cause an abnormality. When the heat is generated, the heat-fusible member 5 is melted and the energized state of the pin receiving contacts 3 and 4 is released, so that a serious accident can be prevented. In other words, the abnormal heat generation by the arc stops the energization to the arc generation portion, so that the arc is stopped and the abnormal state can be prevented early, and the total damage of the socket and the disaster of the lamp falling light can be prevented.

Moreover, since the interlock mechanism is not used and the primary side circuit is not required to be provided in the socket like the interlock structure, it can be realized at low cost and with good assembling. Further, since the heat-fusible member 5 is formed of an insulator, the melted material does not cause a short circuit accident or the like as compared with the case where a thermal fuse is used, and the terminal is not required, so that the size does not increase.

When the heat-fusible member 5 melts due to abnormal heat generation, the opening means 8 opens the space between the lamp pins 1 and 2 and the wire connection terminal 7, so that the lamp pins 1 and 2 are de-energized and an abnormality such as an arc occurs. Is stopped early and 1
Once it is open (contact failure), the lamp cannot be relighted, so it is easy to understand the abnormal condition. A second embodiment of the present invention is shown in FIGS. That is, in this fluorescent lamp socket, in the first embodiment, as shown in FIG. 5, the connecting portion 23 of the pin receiving contacts 3 and 4 is formed in a tongue shape,
The retaining pawls 36 are formed on both sides of the tip of the conductive plate 2.
Forming retaining claws 37 on both sides of the tip of 7,
Positioning pieces 38 are projected from both sides behind the retaining claw 37.

On the other hand, the heat-fusible member 5 is formed in a plate shape from a thermoplastic resin having a lower melting temperature than that of the socket case 6, and the cylindrical portion 3 into which the lamp pins 1 and 2 are loosely fitted is formed substantially in the center thereof.
9 is formed, a T-shaped groove 42 including a head portion 40 and a leg portion 41 is formed at one end portion, and the end portion of the leg portion 41 is open to the edge portion. The width of the leg portion 41 of the head portion 40 in the longitudinal direction is a dimension obtained by adding the thickness of the conductive plate 27 and the thickness of the connecting portion 23, and to these, from the opposite sides of the heat-fusible member 5, to the connecting portion 23 and the conductive plate. Insert the tip of 27 and connect 2
3 is positioned by abutting the surface of the contact portion 24, and the conductive plate 27 is positioned by the positioning piece 38 for the insertion amount. In this state, the width of the leg portion 41 is narrowed so that the width of the leg portion 41 is narrowed so that the facing surface 2 of the connecting portion 23 and the conductive plate 27 is reduced.
The 3'and 27 'are in strong contact with each other to make them electrically conductive, and the retaining claws 36 and 37 maintain the connected state.

FIG. 6A shows a state where the lamp is not mounted, and FIG. 6B shows a state where the lamp is mounted. In each case, the spring 35 exceeds the spring force of the conductive plate 27, so that the pin receiving contacts 3 and 4 are elastically deformed by the spring force of the spring 35 and are positioned inside the lamp pin insertion hole 17 of the plunger 11, and The tip is locked to the inner surface of the plunger 11. FIG. 6C shows a case where an arc occurs due to a contact failure between the lamp pins 1 and 2 and the pin receiving contacts 3 and 4, and the arc heat is transferred to the pin receiving contact 5 and the plunger 11. However, since the heat-fusible member 5 has a lower temperature than that of the plunger 11, the heat-fusible member 5 melts first and falls to the portion which will be the bottom surface of the plunger 11 due to its own weight (5 '). Therefore, the contact pressure between the conductive plate 27 and the pin receiving contacts 3 and 4 is released by the restoring force of the conductive plate 27, the conductive plate 27 is largely separated from the pin receiving contacts 3 and 4, and the pin receiving contact 4 is The spring 3 is provided on the inner surface of the plunger 11.
Pressed by 5. When the conductive plate 27 is separated from the connecting portion 23, the arc is stopped and the power supply to the lamp pins 1 and 2 is stopped, so that the lighting is stopped and the re-lighting is disabled.

Others are the same as those of the first embodiment, and the operation effects are also the same. A third embodiment of the present invention is shown in FIGS. That is, in this fluorescent lamp socket, in the first embodiment, the cylindrical portion 46 is projected on the inner surface of the plunger 11 so as to be continuous with the lamp pin insertion hole 17, and the contact plate 48 is insert-molded, crimped, press-fitted, etc. into the cylindrical portion 46. It is buried by. The contact plate 48 projects a plurality of arms 49 in the direction opposite to the lamp pins 1 and 2, that is, toward the spring 35 side, and forms a retaining portion 50 at the tip of the arm 49. The pin receiving contacts 3 and 4 are formed integrally with the conductive plate 27 of the wire connecting terminal 7.

The opening means 8 has an actuating member 44 engaged with the front side of the pin receiving contacts 3 and 4 and a separating member which has a stronger spring force than the spring 35 and biases the actuating member 44 in the direction opposite to the spring 35. And a spring 45. The operating member 44 is formed in a plate shape from a heat-soluble material such as synthetic resin or a metal such as solder that melts at a low temperature, and has a pair of holes 47 formed in a substantially central portion (FIG. 8). Legs 49 of the contact plate 48 are passed through these holes 47 so as to be able to move forward and backward, and the tips of the legs 49 are caulked to form retaining portions 50. Then, the pin receiving contacts 3, 4 are attached to the tips of the legs 49.
Is pressed by the spring 35 so that the retaining portion 50 is locked to the edge portion of the hole 47.

The heat-fusible member 5 includes pin receiving contacts 3 and 4.
So that it can contact the lamp pins 1 and 2
Although 4 is fixed to the socket case 6, the working member 44 is also used in the embodiment and is formed of a thermoplastic resin. Other configurations are the same as those of the first embodiment. FIG. 7 shows a state in which the lamp pins 1 and 2 are inserted into the lamp pin insertion holes 17, and the contact portions 48 are pressed by the tips of the lamp pins 1 and 2 and the plunger 11 is retracted against the spring 35 to obtain the contact pressure. ing.

FIG. 8 shows a case where an arc is generated between the lamp pins 1 and 2 and the contact plate 48 due to a poor contact of the lamp pin 2, and the operating member 4 heated through the contact plate 48.
4 is melted, and the actuating member 44 pushes the pin receiving contacts 3 and 4 by the spring force of the opening spring 45. Therefore, the edge of the hole 47 of the actuating member 44, which is the heat-fusible member 5, is broken and the leg is broken. 49 is removed, so that the pin receiving contact 4 is separated from the contact plate 48, the arc is stopped, and the lamp is turned off. Therefore, when the contact portions between the lamp pins 1 and 2 and the contact plate 48 have a high temperature due to poor contact, the energization is turned off before the insulators in the vicinity such as the socket case 6 and the plunger 11 are ignited and burned, and the accident is caused. Can be prevented.

In this embodiment, the heat-fusible member 5 also serves as the actuating member 44, but the retaining portion 50 may also serve as the heat-fusible member 5. Alternatively, the contact plate 48 may be made of a metal such as solder that melts at a low temperature and used as the heat-fusible member 5. Fourth Embodiment of the Invention FIGS. 9 and 10
Shown in That is, in this fluorescent lamp socket, in the third embodiment, a fitting hole 51 that fits into the tubular portion 46 of the plunger 11 is formed in the actuating member 44 in place of the contact plate 48, and is hooked at the tip of the tubular portion 46. A stop 50 'is provided, and this is the heat-fusible member 5. In the embodiment, the retaining portion 50 'is integrally formed with the plunger 11 by a thermoplastic resin.
The actuating member 44 is made of an insulator or metal having a higher melting temperature than the heat-fusible member 5.

In FIG. 10, an arc is generated between the lamp pins 1 and 2 and the pin receiving contacts 3 and 4 due to a poor contact, the temperature of the lamp pins 1 and 2 and the pin receiving contacts 3 and 4 rises, and the cylindrical portion. The retaining portion 50 ′ of 46 melts, the actuating member 44 retracts by the action of the opening spring 45, compresses the spring 35, the pin receiving contact 4 of the conductive plate 27 separates from the lamp pins 1 and 2, and the arc stops. Then, since the power supply to the lamp pins 1 and 2 is stopped, the lamp 33 is turned off.

Others are the same as those of the third embodiment, and the contact plate 48 of the third embodiment is not necessary, so that the structure is simple and the same effects as the third embodiment are obtained. A fifth embodiment of the present invention is shown in FIGS. That is, this fluorescent lamp socket is, in the first embodiment,
The opening means 8 and the heat-fusible member 5 are attached to the pin receiving contacts 3,
It is shared by 4. The pin receiving contacts 3 and 4 are made of a metal having a heat melting temperature lower than that of the socket case 6, for example, solder, and a connecting hole 52 is formed at a position apart from the contact position of the lamp pins 1 and 2, while the conductive property is maintained. A connection hole 53 is formed at the tip of the plate 27, and the lamp pins 1 and 2 and the conductive plate 27 are connected to these through caulking rivets 54.

FIG. 12 (a) shows a normal lamp mounting state, and FIG. 12 (b) shows a case where the lamp pins 1 and 2 and the pin receiving contacts 3 and 4 are not in good contact with each other. An arc is blown between the pin receiving contacts 3 and 4 and the pin receiving contact 4 is heated and melted, and falls into the plunger 11 (4 '). For this reason, the arc is stopped, the lamp pin 2 and the conductive plate 27 are separated from each other, and conduction is lost.
Since the lamp pin 2 is not supplied with power, the lamp 33 is turned off.

Reference numeral 55 is a spring positioning rib. Others are the same as those in the first embodiment. In addition to the simple structure, the pin receiving contacts 3 and 4 having the highest temperature when abnormal heat is generated by the arc are the heat-soluble members 5, so that the plunger 11 and the socket case 6 are less likely to be thermally deformed. . The same operational effects as those of the first embodiment are obtained.

Although the pin receiving contacts 3 and 4 are made of metal, they may be made of synthetic resin whose surface is coated with a conductive material or plated. A sixth embodiment of the present invention is shown in FIGS. That is, in this fluorescent lamp socket, in the first embodiment, the heat-fusible member 5 has a predetermined length and is interposed between the spring 35 and the pin receiving contacts 3 and 4. In the embodiment, it has a tubular shape having a predetermined axial length, and guide grooves 57 extending in the axial direction are formed on both sides.

The opening means 8 is connected to the stopper 56 for locking the pin receiving contacts 3 and 4 side of the spring 35 elastically generated by the melting of the heat-soluble member 5 and the lamp pins 1 and 4 connected to the pin receiving contacts 3 and 4. 2 and the conductive plate 27 of the wire connection terminal 7 that is biased in a direction away from the spring 35 with a force smaller than that of the spring 35. The stopper 56 has a plate shape and is provided on both sides of the central partition 58 of the plunger 11 with the lamp pin insertion holes 17 respectively.
Are disposed so as to be located on both sides of the guide groove 57, the inner portion also serves as a guide for the guide groove 57, and the tip end serves as a stopper portion.
As shown in FIG. 15B, the position of the stopper portion of the stopper 56 is larger than the length L of the lamp pins 1 and 2,
It is formed to be higher than the height h from the surface of the plunger 11 of 6.

The electric wire connecting terminal 7 is composed of pin receiving contacts 3, 4,
The conductive plate 27 and the quick-connect terminal portion 26 are integrally formed by a belt-shaped conductive plate, and the whole is bent into a substantially U-shape. At the time of assembly, the pin receiving contacts 3 and 4 are positioned so as to separate from the lamp pins 1 and 2 inserted into the lamp pin insertion holes 17, and the pin receiving contacts 3 and 4 are not inserted until the spring 35 is incorporated. It is pressed against 1,2.

FIG. 16A shows an assembled state (state in which the lamp is not mounted), in which the conductive plate 27 integrated with the pin receiving contact 4 is pressed by the spring 35 and positioned inside the lamp pin insertion hole 17. . 15A and 16A show a state in which the lamp pins 1 and 2 are mounted in the lamp pin insertion hole 17, the pin receiving contacts 3 and 4 are pushed back by the lamp pins 1 and 2, and the spring 35 is moved. It is compressed. 15 (b) and 16 (c), the arc is generated due to the poor contact between the lamp pins 1 and 2 and the pin receiving contacts 3 and 4, and the heat is melted through the pin receiving contacts 3 and 4. Member 5
Is melted, so that the spring 35 extends and the tip is locked to the stopper 56, and the pin receiving contactor 4 moves the conductive plate 2
The spring force of 7 operates to move away from the lamp pin 2. Therefore, the arc stops and the lamp pins 1 and 2
The power supply to the lamp is stopped and the lamp 33 is turned off.

The other structure is similar to that of the first embodiment. Further, since the pressing of the spring 35 is transmitted to the pin receiving contact 4 via the heat-fusible member 5, even if the spring 35 is a coil spring, the pin receiving contacts 3 and 4 are pressed uniformly, so that the contact between the lamp pins 1 and 2 is prevented. It is easy to stabilize, and has the same effect as the first embodiment without complicating the internal structure.

The seventh embodiment of the present invention is shown in FIGS. That is, this fluorescent lamp socket is the same as the lamp pin 1 of the 110 W lamp 33 in the sixth embodiment.
2 is a plate material bent into an L shape (FIG. 20), and the pin receiving contacts 3 and 4 are the contact portions 6 with the heat-fusible member 5.
0 is attached. The contact portion 60 is made of metal, and the heat-fusible member 5 is a thermoplastic resin having a heat melting temperature lower than that of the socket case 6, and is integrally formed. As shown in FIG. 18, the contact portion 60 has a notched concave portion 64 which contacts the tip and side surfaces of the lamp pins 1 and 2 at the tip portion,
A contact portion 63 that contacts the pin receiving contact 4 is extended from both sides of the rear end portion. Further, the heat-fusible member 5 integrally formed with the contact portion 60 has a spring receiving projection 65 at the tip opposite to the cutout recess 64, and the fitting holes 2 of the pin receiving contacts 3 and 4 are formed.
Penetrates 4 61 is a guide part of the contact part 60, 62
Is a spring operating plate interposed between the spring 35 and the pin receiving contacts 3 and 4, and the heat-fusible member 5 penetrates therethrough.

FIG. 21 (a) shows an assembled state (lamp not mounted) in which the pin 35 and the contact portion 60 are pushed out by pressing the heat-fusible member 5 by the spring 35. 20 (a) and 21 (b) show a state in which the lamp is mounted, and the plunger 11 has the lamp pins 1 and 2.
When is inserted, the lamp pins 1 and 2 come into contact with the notch concave portion 64 of the contact portion 60 and press this against the spring 35 to obtain the contact pressure.

20 (b) and 21 (c),
This is a case where the lamp pins 1 and 2 have a poor contact, the heat-fusible member 5 is melted by the arc between the lamp pins 1 and 2 and the contact portion 60, the spring 35 extends and is locked to the stopper 56, and the contact portion 60 Is retracted by the spring force of the conductive plate 27 and separated from the lamp pins 1 and 2, so that the arc stops and the power supply to the lamp 33 stops at the same time.

Others are the same as those of the sixth embodiment, and the operation effects are also the same. The eighth embodiment of the present invention is shown in FIG.
And shown in FIG. That is, in this fluorescent lamp socket, in the first embodiment, the fusible member 5 also serves as the spring 35 that presses the pin receiving contacts 3 and 4 against the lamp pins 1 and 2. In the embodiment, a coil-shaped resin spring is used. Etc. are used. The opening means 8 is also used as the conductive plate 27 provided on the wire connection terminal 7 and connected to the pin receiving contacts 3 and 4, and the pin receiving contacts 3 and 4 are separated from the lamp pins 1 and 2 by melting the heat-soluble member 5. Biasing force is added to do so.

Reference numeral 67 denotes an auxiliary spring, which is the socket case 6
Is interposed between the bottom surface of the cover and the plunger 11,
The plunger 11 is biased in the protruding direction. FIG. 23
(A) shows the assembled state of the pin receiving contacts 3 and 4, in which the spring 35 which is the heat-fusible member 5 is not attached. At this time, the pin receiving contacts 3 and 4 are
It is mounted so as to be stable at a position separated by a distance L ₁ from the position of the front end in the insertion state of _{No. 2} .

FIG. 23 (b) shows a normal use state,
The spring 35 presses the pin receiving contacts 3 and 4 toward the lamp pins 1 and 2 to apply a contact pressure. The ramp 33 presses the plunger 11 to compress the auxiliary spring 67.
In (c) of FIG. 23, an arc is generated between the lamp pins 1 and 2 and the pin receiving contacts 3 and 4 due to poor contact, and the spring 35 which is the fusible member 5 contacting the pin receiving contacts 3 and 4 is melted. In this state, the spring 35 loses its biasing force at this time, so that the spring force of the conductive plate 27 causes the pin receiving contacts 3 and 4 to move to the positions in the assembled state shown in FIG. , The arc is stopped, and the power supply to the lamp 33 is stopped.

Others are the same as those of the first embodiment, the number of parts is not increased, the structure is not changed and the operation is similar to that of the first embodiment. A ninth embodiment of the present invention is shown in FIGS. That is, in this fluorescent lamp socket, in the first embodiment, the heat-fusible member 5 is also used as the spring bearing 20 which is a spring bearing, and the opening means 8 is provided in the wire connecting terminal 7 and the pin receiving contacts 3, 4 are provided. The conductive plate 27 is connected to the lamp plate 1, and is biased so as to be separated from the lamp pins 1 and 2 by melting the heat-soluble member 5. That is, when the spring 35 is not attached, the pin receiving contacts 3 and 4 of the conductive plate 27 are provided between the tip positions of the lamp pins 1 and 2 at the normal attaching position and the inner wall of the cover 10 or the spring receiver 20 that supports the spring 35. The conductive plate 27 is incorporated into the socket case 6 so as to be positioned. As a result, as shown in FIG. 26, the spring 35 exerts a spring force in the direction of arrow A, and the conductive plate 27 exerts a spring force in the direction of arrow B opposite to the arrow A. In particular, the pin receiving contact 4 is located at a position apart from both ends of the lamp pins 1 and 2 and the spring receiver 20 in a state where the base 33a of the lamp 33 is in contact with the surface of the body 9 as shown by an imaginary line. If you assemble it like this, it will be even more reliable.

The spring receiver 20 includes a portion for receiving the force of the end portion of the spring 35. The spring receiver 20 is formed integrally with the socket case 6 by a thermoplastic resin, or is a member separate from the socket case 6. The heat-fusible member 5 having a low heat melting temperature is simultaneously molded. The conductive plate 27 is made of a material such as phosphor bronze or Corson alloy, which has excellent conductivity and spring properties. Generally, a stainless wire is used for the spring 35, but a material such as phosphor bronze for spring or a copper alloy such as Corson alloy having a high thermal conductivity, or a material having excellent conductivity and spring property may be used.

If there is poor contact between the tips of the lamp pins 1 and 2 and the pin receiving contacts 3 and 4, an arc is generated and the lamp pins 1 and 2 and the pin receiving contacts 3 and 4 cause abnormal heat generation, and the pin receiving contacts The heat of the contacts 3 and 4 is transmitted through the spring 35 to melt the spring bearing 20 of the heat-fusible member 5. Therefore, the spring 35 loses its support by the spring receiver 20, the spring 35 is pressed toward the cover 10 by the restoring force of the conductive plate 27, and the spring receiver 20 is projected from the cover 10 as shown by the imaginary line in FIG. The cover 10 is broken and the spring 35 is projected to the outside. As a result, the pin receiving contacts 3 and 4 move away from the lamp pins 1 and 2 to the position shown in FIG.
The circuit is turned off by no contact between the pin receiving contacts 3 and 4.

Others are the same as those in the first and eighth embodiments. The operation and effect are similar to those of the eighth embodiment, but when abnormal heat generation occurs, as shown in FIG.
The tip positions of the lamp pins 1 and 2 when the surfaces including the lamp pin through holes of the body 9 of the socket case 6 and the plunger 11 and the surfaces of the lamp cap 33a including the roots of the lamp pins 1 and 2 are aligned with each other and the spring bearing 20. By assembling the conductive plate 27 so that the pin receiving contactor 4 is positioned between them, the circuit can be surely turned off when the contact with the two lamp pins 1 and 2 becomes defective at the same time. Also, even if the poor contact with one lamp pin 1 or 2 affects the other and the two spring supports 20 are melted and the two springs 35 move together, the circuit is surely turned off. Can be

Although the body 9, the plunger 11 and the cover 10 are made of thermoplastic resin, at least the spring bearing 20 provided on the cover 10 and its peripheral portion are made of thermoplastic resin, and the other portions are made of thermosetting resin. You may form with a porcelain. Further, the plunger 11 may be integrated with the body 9.

[0055]

According to the method for preventing abnormal heat generation of the fluorescent lamp socket according to the first aspect of the present invention, power is supplied to the lamp pin from the pin receiving contact of the fluorescent lamp socket, but abnormal heat is generated due to poor contact between the lamp pin and the pin receiving contact. Then, the heat-fusible member is melted and the energization state of the pin receiving contact is released, so that a serious accident can be prevented. Moreover, there is an effect that the interlock mechanism is not used.

According to the fluorescent lamp socket of claim 2, when the heat-fusible member melts due to abnormal heat generation, the opening means opens the space between the lamp pin and the wire connection terminal, so that the current supply to the lamp pin is stopped and an arc or the like is generated. The abnormality stops early and the lamp cannot be relighted, so it is easy to understand the abnormality. According to the fluorescent lamp socket of claim 3, when the heat-fusible member melts due to abnormal heat generation, the conductive plate is separated from the connecting portion of the pin receiving contact by the spring action of the conductive plate, and therefore, the same effect as in claim 2 is obtained. There is.

According to the fluorescent lamp socket of the fourth aspect, when the heat-fusible member melts due to abnormal heat generation, the actuating member pushes the pin receiving contact against the spring by the spring force of the opening spring. Since the receiving contact is separated from the lamp pin, the same effect as in claim 2 is obtained. According to the fluorescent lamp socket of claim 5, when the pin receiving contact serving also as the opening means and the heat-fusible member melts due to abnormal heat generation, it flows down by its own weight and the lamp pin and the wire connection terminal are separated. It has the same effect as 2, and the structure is simple,
Further, since the pin receiving contact has the highest temperature due to abnormal heat generation and melts at an early stage, thermal deformation of other members such as the socket case is hard to occur.

According to the fluorescent lamp socket of the sixth aspect, when the heat-fusible member melts due to abnormal heat generation, the spring restores to the stopper, and the pin receiving contact also elastically deforms in a direction approaching the stopper, and the pin Since the receiving contact is separated from the lamp pin, the same effect as in claim 2 is obtained. According to the fluorescent lamp socket of claim 7, when the spring, which is a heat-fusible member, melts due to abnormal heat generation, the pin receiving contact is separated from the lamp pin by the spring force of the conductive plate. Besides, the structure is simple.

According to the fluorescent lamp socket of the eighth aspect, when the spring bearing, which is a heat-fusible member, melts due to abnormal heat generation,
Since the pin receiving contact moves away from the lamp pin by the spring force of the conductive plate, there is the same effect as in claim 2 and the structure is simplified.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a first embodiment of the present invention.

FIG. 2 is a lighting circuit diagram to which the fluorescent lamp socket is applied.

FIG. 3 is an operation explanatory diagram when the fluorescent lamp socket abnormally generates heat.

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

FIG. 5 is an exploded perspective view of the main part.

FIG. 6 is a diagram illustrating an operation when abnormal heat is generated.

FIG. 7 is a cutaway side view of the third embodiment.

FIG. 8 is an operation explanatory diagram when the abnormal heat is generated.

FIG. 9 is a cutaway side view of the fourth embodiment.

FIG. 10 is an operation explanatory diagram when the abnormal heat is generated.

FIG. 11 is an exploded perspective view of the fifth embodiment.

FIG. 12 is an explanatory diagram of an operation when the abnormal heat is generated.

FIG. 13 is an exploded perspective view of a sixth embodiment.

FIG. 14 is a cutaway side view of the state before the spring is attached in the assembling process of the fluorescent lamp socket.

FIG. 15 is an operation explanatory view as seen in a cross section when abnormal heat is generated.

FIG. 16 is an explanatory diagram of an operation in the vertical section.

FIG. 17 is an exploded perspective view of a seventh embodiment.

FIG. 18 is an enlarged perspective view of the contact portion and the heat-fusible member.

FIG. 19 is a cutaway side view before attachment of the spring in the assembly process.

FIG. 20 is an operation explanatory view as seen in a cross section at the time of abnormal heat generation.

FIG. 21 is an operation explanatory view as seen in its vertical section.

FIG. 22 is an exploded perspective view of the eighth embodiment.

FIG. 23 is an operation explanatory diagram when abnormal heat is generated.

FIG. 24 is an exploded perspective view of the ninth embodiment.

FIG. 25 is a sectional view of the assembly process.

FIG. 26 is a partial cross-sectional view for explaining the operation of the spring and the direction of the spring of the conductive plate.

[Explanation of symbols]

 1, 2 Lamp pin 3, 4 Pin receiving contact 5 Heat-fusible member 8 Opening means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomoyuki Ono 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Inventor, Yasuhiro Kimura 1048, Kadoma, Kadoma, Osaka Prefecture

Claims (8)

[Claims] 1. A method for preventing abnormal heat generation in a fluorescent lamp socket, comprising: a fluorescent lamp socket having a pair of pin receiving contacts that come into contact with a pair of lamp pins; and preventing abnormal heat generation caused by poor contact between the lamp pin and the pin receiving contacts. The fluorescent lamp socket is characterized in that the heat-soluble member maintains the energized state of the pin receiving contact to the lamp pin, and the heat-fusible member is melted by the abnormal heat generation to release the energized state. How to prevent abnormal heat generation. 2. A pin receiving contact that comes into contact with a lamp pin of a fluorescent lamp, an electric wire connecting terminal connected to the pin receiving contact, and a heat-fusible member that receives and melts abnormal heat of the pin receiving contact. A fluorescent lamp socket provided with opening means for opening an electrical connection between the lamp pin and the wire connection terminal by melting the heat-soluble member. 3. The opening means is composed of a conductive plate provided on the wire connection terminal and provided with a spring force in a direction away from the connection portion of the pin receiving contact, and the heat-fusible member is formed of the conductive material. The fluorescent lamp socket according to claim 2, wherein the connection portion and the conductive plate are electrically and mechanically connected to each other against the spring force of the plate. 4. The pin receiving contact is housed in a socket case, and the socket case has a lamp pin insertion hole for inserting a lamp pin and a spring for pressing the pin receiving contact against the lamp pin. The means includes an actuating member engageable with the front side of the pin receiving contact, and a separation spring having a stronger spring force than the spring and biasing the actuating member in a direction opposite to the spring. The fluorescent lamp socket according to claim 2, wherein the heat-fusible member fixes the operating member to the socket case such that the pin receiving contact contacts the lamp pin. 5. The fluorescent lamp socket according to claim 2, wherein the opening means and the heat-fusible member also serve as the pin receiving contact. 6. A spring for pressing the pin receiving contact against the lamp pin, wherein the heat-fusible member has a predetermined length and is interposed between the spring and the pin receiving contact. The opening means includes a stopper for locking the pin receiving contact side of the spring elastically generated by melting the heat-soluble member,
The fluorescent lamp socket according to claim 2, wherein the fluorescent lamp socket is configured to be connected to the pin receiving contact and urged with a force smaller than the spring in a direction away from the lamp pin. 7. The opening means is composed of a conductive plate provided on the wire connection terminal and provided with a spring force in a direction away from a connection portion of the pin receiving contact, and the fusible member is formed of the conductive material. 3. The fluorescent lamp socket according to claim 2, wherein the fluorescent lamp socket also serves as a spring for pressing the pin receiving contact against the lamp pin with a good spring force of a plate. 8. The pin receiving contact is housed in a socket case, and the socket case has a lamp pin insertion hole for inserting a lamp pin and a spring receiver, and is provided between the pin receiving contact and the spring receiver. A spring for pressing the lamp pin is housed, and the opening means is formed of a conductive plate provided in the electric wire connecting terminal and provided with a spring force in a direction away from the connecting portion of the pin receiving contact, The fluorescent lamp socket according to claim 2, wherein the fusible member is also used as the spring receiver.