JP2006302755A - Lamp socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp socket capable of avoiding drop of a lamp when a thermal load is received without adding an component. <P>SOLUTION: In a socket body 1 made of a resin, a slot 2 for inserting a pair of lamp pins 11 of a lamp base in a direction perpendicular to a projecting direction thereof is formed continuously from a side surface to a front surface thereof. A pair of contact pieces 21 come into contact with the pair of lamp pins 11 in the socket body 1. The pair of contact pieces 21 are respectively formed of elongated plates vertically extended to horizontally face each other; lamp pin holding parts 20 respectively bent to prevent the lamp pins 11 from dropping are formed at positions of the pair of contact pieces 21 in contact with the lamp pins 11; and the pair of contact pieces 21 are fixed to the socket body 1 at positions separated from the lamp pin holding parts 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lamp socket such as a rotary socket in which a straight tube fluorescent lamp is mounted.

  A first conventional example is shown in FIGS. That is, the resin socket body 1 is formed with a groove 2 that allows a pair of lamp pins 11 of the lamp cap to be inserted in a direction perpendicular to the projecting direction from the lower surface side to the front surface. The socket body 1 includes a body 3 and a cover 4, in which a groove 2 is formed, and a slit 4 a that communicates with the groove 2 and guides the lamp pin 11 in the rotor hole 4 a on the front surface of the cover 4 that communicates with the groove 2. A rotor 6 in which the grooves 5 are formed in the diameter direction is arranged, and the rotor 6 is rotatably held by a cylindrical portion 7 projecting from the bottom of the body 3. The pair of contact pieces 8 are elongated plates extending in the direction in which the pair of lamp pins 11 are inserted through the grooves 2 in the socket body 1, that is, in the vertical direction, and are disposed opposite to each other in the horizontal direction in the socket body 1. One end 8 a is sandwiched between the rib 9 of the body 3 and the wall portion 10, and the lamp pin 11 contacts the facing surface of the contact piece 8.

  The lamp base 12 is positioned at the center of the socket body 1 while passing the lamp pin 11 from the groove 2 through the slit groove 5, and when the lamp base 12 is rotated about 90 degrees at that position, the rotor 6 is rotated together. Contacts the contact piece 8 and receives power. At this time, the lamp 13 is held by its own weight mainly by the rotor 6.

In a second conventional example (see, for example, Patent Document 1), a pair of grooves for inserting a pair of lamp pins is formed, and the lamp pins are supported by a pair of contact pieces that extend vertically in the socket body and are held at both ends. This holds the lamp.
Japanese Patent Laid-Open No. 11-214103

  As described above, in the first conventional example, the lamp is held by the rotor while the lamp is mounted on the socket body, and in the second conventional example, the lamp is held by the contact piece supported by the socket body. ing.

  By the way, at the end of the lamp life of the straight tube fluorescent lamp, there is a possibility that the temperature of the lamp cap and the lamp socket will rise due to heat generated from the vicinity of the lamp filament.

  On the other hand, means for improving the heat resistance of the lamp socket is used. Specifically, the lamp socket is made of a porcelain, a thermosetting resin, or a thermosetting resin (PBT or the like) excellent in heat resistance.

  However, in the use of porcelain, there is a problem that it is vulnerable to impact, dimensional accuracy is poor, it is difficult to reduce the size, and it is difficult to adopt a fast connection terminal of a wire connecting portion.

  Although the dimensional accuracy and the like can be slightly improved by employing a thermosetting resin, there are problems such as poor moldability, aging dimensional change (thermal shrinkage), and difficulty in dealing with environmental problems such as difficulty in recycling materials.

  Although the above problems are almost solved by the use of a heat-resistant thermoplastic material, the heat-resistant material is generally expensive and has a problem of poor electrical performance such as arc resistance and tracking resistance.

  Furthermore, in this resin lamp socket, there is a serious problem that the rotor melts when the lamp socket is subjected to a heat load, or the portion supporting the contact piece of the socket body melts and the lamp falls. . As a means for preventing the lamp from falling, a method of providing a lamp holding spring in a lighting fixture is used for a long lamp such as 110 W. Further, as a means for suppressing the temperature rise on the lamp side, a method of providing a temperature fuse in the lamp base is used in compact fluorescent lamps, halogen lamps and the like.

  However, there is a problem that the number of parts increases, leading to an increase in cost.

  The present invention has been made in view of such a reason, and an object of the present invention is to provide a lamp socket capable of avoiding a lamp drop when subjected to a thermal load without adding parts.

  In the lamp socket of the present invention, the resin socket main body continuously forms a groove from the side surface to the front surface through which the pair of lamp pins of the lamp base are inserted in a direction perpendicular to the protruding direction, and the pair of lamp pins is internally inserted through the groove. Move to. The pair of contact pieces are in contact with the pair of lamp pins in the socket body. The pair of contact pieces are formed by elongated plates extending in the vertical direction, are opposed to each other in the horizontal direction, and are bent so that the lamp pins do not fall at locations where the lamp pins contact the pair of contact pieces. The lamp pin holding portion is formed, and the pair of contact pieces are fixed to the socket body at a position away from the lamp pin holding portion.

  According to the lamp socket of the present invention, even if the portion near the lamp pin holding portion of the socket body is melted due to the heat generated by the lamp, the lamp is held by the contact piece via the lamp pin, so that the fall can be prevented. For this reason, it can be made cheap without increasing the number of parts.

  An embodiment of the present invention will be described with reference to FIGS. As described in the conventional example, the socket body 1 includes the resin body 3 and the resin cover 4, and the resin rotor 6 is provided on the front surface of the cover 4. The socket body 1 will be described in more detail. As shown in FIG. 1, the body 3 has a peripheral wall 15 erected on the inner side of the peripheral edge, and the cover 4 has an outer wall and a front wall that cover the peripheral wall 15. Mounting legs 16 are extended to the rear of the body 3 on both sides of the body 3. In order to insert the lamp pin 11 into such a socket body 1, a groove 2 for inserting the lamp pin 11 in a direction perpendicular to the projecting direction is formed continuously from the lower side of the side surface to the front surface, and the pair of lamp pins 11 passes through the groove 2. Is moved inside. A rotor hole 4 a is formed in the front surface of the socket body 1, that is, in the longitudinal center of the groove 2 of the cover 4. Further, the body 3 has a cylindrical portion 7 standing at the center of the rotor hole 4a, a split groove 12 is formed along the groove 2 at the center of the end of the cylindrical portion 7, and a circumferential groove 13 is formed on the outer periphery. Forming. For the connecting portion (not shown) between the body 3 and the cover 4, for example, engagement between a claw and a locking portion, a connecting tool, or the like is used. The rotor 6 closes the rotor hole 4 a, forms a slit groove 5 communicating with the groove 2 in the diameter direction, forms a hole 17 at the center position of the slit groove 5, and back side of the hole 17 The outer cylindrical portion 18 that fits into the cylindrical portion 7 is projected from the periphery of the outer cylindrical portion, and a protruding portion (not shown) that engages with the circumferential groove 13 is formed on the inner peripheral surface of the outer cylindrical portion 18. 7 is rotatably held.

  The pair of contact pieces 21 is formed of a long and narrow conductive plate, and is vertically disposed on both sides of the cylindrical portion 7 so as to face each other in the horizontal direction. One end 19 is integrally formed and held on the body 3, and one end 19 thereof. Is exposed on the outer surface to become a terminal. The other end of the contact piece 21 is free without contacting the body 3 in the body 3. Further, lamp pins holding portions 20 bent in, for example, a dogleg shape are provided on both sides of the cylindrical portion 7 in the middle of the contact piece 21, and the lamp pins are held by the lamp pin holding portions 20. For example, it is preferable that the depth of the character is greater than or equal to the radius of the lamp pin 11 because it can be reliably prevented from falling.

  When the lamp is mounted, the lamp pin 11 is inserted upward from the groove 2 and the lamp pin 11 is inserted through the slit groove 5 so that the lamp base is positioned at the center of the rotor 6. 11 slides on the opposing surface of the contact piece 21 and fits into the lamp pin holding portion 20. As a result, the lamp pin 11 comes into contact with the contact piece 21 and power can be supplied to the lamp filament, and the lamp is held by the contact piece 21. Therefore, even if the temperature of the lamp cap rises and the resin in the vicinity of the lamp pin 11, for example, the outer cylinder portion 18, melts, the part integrally formed with one end on the terminal side of the contact piece 21 away from the lamp pin 11 is formed. As long as the lamp is not melted, the lamp is prevented from falling while being held by the contact piece 21.

  In the present invention, the contact piece 21 is not limited to being integrally formed with the socket body 1 but may be fixed to the socket body 1 by being sandwiched or locked by a rib or the like of the socket body. The contact piece 21 may be supported at both ends. Further, the shape of the lamp pin holding portion 20 is not limited to the dogleg shape, and includes a Z shape and a horizontal U shape.

It is a schematic front view of the body of one embodiment of this invention. It is an external appearance perspective view of a lamp pin. (A) is a side view of the lamp socket with the lamp mounted, (b) is a front view of the body before the lamp pin is inserted, and (c) is a front view with the lamp pin inserted.

Explanation of symbols

1 Socket body 2 Groove 3 Body 4 Cover 11 Lamp pin
19 One end 20 Lamp pin holding part 21 Contact piece

Claims (1)

A resin socket body for continuously forming a groove for inserting a pair of lamp pins of the lamp cap in a direction perpendicular to the protruding direction from the side surface to the front surface, and moving the pair of lamp pins to the inside through the groove, and the socket body In a lamp socket comprising a pair of contact pieces with which the pair of lamp pins contact
The pair of contact pieces are formed by elongated plates extending in the vertical direction, are opposed to each other in the horizontal direction, and are bent so that the lamp pins do not fall at locations where the lamp pins contact the pair of contact pieces. A lamp socket, wherein the lamp pin holding portion is formed, and the pair of contact pieces are fixed to the socket body at a position away from the lamp pin holding portion.

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