JP2009110841A - Base for fluorescent lamp, fluorescent lamp, and lighting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base for fluorescent lamp in which the base is constructed of a base substrate and a base pin cover and the engagement structure of the base substrate and the base pin cover is simplified, a fluorescent lamp, and a lighting apparatus. <P>SOLUTION: The base for fluorescent lamp 10 includes a cylindrical substrate 11 to which an arc tube 2 is adhered and which has a wiring space 11d inside and an aperture 11a to communicate with this wiring space 11d, a base pin cover 12 which is engaged with the base substrate 11 and installed on the aperture so as to close the wiring space 11d of the base substrate 11, and in which base pins 13 are installed, a pair of projections 14 which protrude from the outer periphery of the base substrate 11, recessed parts 16 which are formed so as to communicate with the aperture 11a toward the inside of the projections 14, and a pair of locking parts 17 which protrude from the outer periphery of the base pin cover 12 and are engaged with the recessed parts 16. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a base suitable for a compact fluorescent lamp, a fluorescent lamp using the base, and a lighting fixture.

  Conventionally, the base of this type of fluorescent lamp is integrally formed of a synthetic resin. In particular, in order to prevent an excessive temperature rise in the electrode sealing part of the arc tube, when providing a temperature protection element, the base part is cut out and formed, and the temperature protection element is accommodated in the accommodation part, and thereafter The appearance is improved by injecting an adhesive into the storage section and covering it with a lid (see Patent Document 1).

On the other hand, a technique is disclosed in which a base is composed of a valve support and a pin support, a temperature protection element (temperature fuse) is housed therein, and wiring processing such as lead wires is performed (see Patent Document 2). .
JP 2000-30664 A JP 2007-115658 A

  However, the one disclosed in Patent Document 1 forms a storage space in order to dispose the temperature protection element in the base, and there is a problem that the configuration becomes complicated. In addition, the one disclosed in Patent Document 2 is configured such that the base is composed of two members, a valve support body and a pin support body, and a predetermined wiring process is performed inside the base, but the valve support body and the pin support body. No specific engagement structure is disclosed, and in the current situation, the problems that occur when engaging the valve support and the pin support are not shown at all.

  The present invention has been made in view of the above situation, and a base for a fluorescent lamp, a fluorescent lamp, and a base composed of a base and a base pin cover, and a simplified engagement structure between the base and the base pin cover. It aims at providing a lighting fixture.

  A fluorescent lamp base according to claim 1 is a cylindrical base body having a luminous tube fixed therein and having a wiring space and an opening communicating with the wiring space; and the base body engaged with the base body. A base pin cover which is attached to the opening so as to close the wiring space of the base and in which a base pin is disposed; a pair of protrusions protruding from the outer peripheral surface of the base body; A recess formed so as to communicate with the opening; and a pair of locking portions protruding from the outer periphery of the base pin cover and engaging with the recess.

  In the wiring space of the base, it is planned that wiring members such as lead wires and temperature protection elements for connecting the electrodes of the fluorescent lamp and the base pins are arranged. However, it is not essential for the present invention to dispose the temperature protection element.

  The protrusion has a function of guiding and positioning the connection of the base in cooperation with the socket side when the base pin is connected to the socket. The locking portion provided on the base pin cover may be fitted in the concave portion formed on the projection, but there may be a slight gap. In short, the base pin cover is the wiring space of the base base. It is only necessary to engage so as to prevent movement when a force directed toward the side is applied.

  According to a second aspect of the present invention, there is provided a fluorescent lamp comprising: the fluorescent lamp base according to the first aspect; and an arc tube fixed to the fluorescent lamp base and having a bent discharge path.

  According to a third aspect of the present invention, there is provided a lighting fixture comprising: a fixture main body; and the fluorescent lamp according to the second aspect disposed in the fixture main body.

  In the present invention, the base is composed of a base and a base pin cover, and the base pin and the base pin cover are engaged with each other so that the base pin cover is not pushed into the base base by utilizing the concave portion of the protrusion. By doing so, it is not necessary to specially provide an engaging means for locking, and it is possible to provide a fluorescent lamp base, a fluorescent lamp, and a lighting fixture that do not impair the merchantability with a simplified configuration.

  Hereinafter, embodiments of a fluorescent lamp base and a fluorescent lamp according to the present invention will be described with reference to FIGS. 1 is a front view showing a fluorescent lamp, FIG. 2 is a perspective view showing a base for a fluorescent lamp, FIG. 3 is an exploded perspective view showing a base for a fluorescent lamp, and FIG. 4 is a base pin cover and base base. FIG. 5 is a front view thereof, FIG. 6 is a side view thereof, and FIG. 7 is a sectional view of a base for a fluorescent lamp.

  In FIG. 1, reference numeral 1 denotes a compact fluorescent lamp, which includes an arc tube 2 and a base 10. The compact fluorescent lamp 1 has a length of 560 mm. The arc tube 10 is configured by joining two glass tubes 2a and 2b having a tube diameter of 20 mm at their ends. The two glass tubes 2a and 2b are each made of soda lime glass or the like, and are joined by heating and blowing the side walls of the adjacent end portions, but abutting and blowing the blown portions to each other. Therefore, the two glass tubes 2a and 2b are mechanically joined to each other by the joint portion 2c, and the space portions of the glass tubes 2a and 2b are electrically connected to each other through the joint portion 2c. The arc tube 2 forms a single bent discharge path as a whole.

  Electrodes are sealed at the ends of the glass tubes 2a and 2b corresponding to the ends of the bent discharge path (not shown). Both ends of the electrodes are connected to lead wires, respectively, and these lead wires pass through the flare stem sealed at the ends of the glass tubes 2a and 2b in an airtight manner and are connected to external lead wires.

  The arc tube 2 is fixed to the base 10. As shown in FIG. 2, the base 10 is a GY10q-type base whose overall shape is a substantially oval column shape and is defined by JIS standards. The base 10 includes, for example, a substantially cylindrical base 11 formed of an insulator such as polybutylene terephthalate (PBT) resin, and an opening 11a formed at one end of the base 11 (see FIG. 3). And a cap pin cover 12 made of an insulating material such as PBT resin. A total of four cap pins 13 made of a conductive material such as brass project from the cap pin cover 12. From the outer peripheral surface of the base 11, a pair of positioning projections 14, 14 for connecting to the socket are provided at positions 180 degrees symmetrical with respect to the center of the base 11. In addition, in the positions adjacent to the pair of protrusions 14 and 14, there are formed concave insertion grooves 15 and 15 for preventing erroneous insertion of different types of fluorescent lamps.

  Next, FIGS. 3 to 6 show a state where the base body 11 and the base pin cover 12 are separated. The base body 11 has a hollow shape, one end side is an opening 11a to which the base pin cover 12 is mounted, the other end side is partitioned by a central separation wall 11c, and the insertion hole 11b into which the arc tube 2 is inserted, 11b. On the outer peripheral surface on the opening 11a side, protrusions 14 are formed at opposing positions. The protrusions 14 and 14 have an inverted mountain-shaped portion in the drawing, and have a function of guiding and positioning the connection of the fluorescent lamp 1 when the fluorescent lamp 1 is connected to the socket. Specifically, when the base pins 13 are connected to the socket, the connection of the fluorescent lamp 1 is guided in cooperation with the socket side, and the base pins 13 are held between the power supply spring terminals on the socket side. As described above, the positioning is supported by applying an elastic force.

  Concave portions 16 and 16 are formed inside the protrusions 14 and 14, and the concave portions 16 and 16 communicate with the wiring space 11 d and the opening portion 11 a of the base 11. Furthermore, engaging projections 11e and 11e with which the base pin cover 12 engages are formed on the opposing inner walls in the vicinity of the opening 11a of the base base 11.

  The base pin cover 12 has an outer peripheral shape that matches the inner peripheral shape of the opening portion 11a of the base base 11, and the four base pins 13 are projected on the surface. These cap pins 13 are arranged with a predetermined distance from each other. Further, on the outer periphery of the base pin cover 12, locking portions 17 and 17 are provided so as to project at opposing positions. The locking portions 17 and 17 have a square surface shape and a substantially T-shaped side surface (see FIG. 6). Engagement recesses 12 a and 12 a that engage with the engagement protrusions 11 e and 11 e of the base body 11 are formed on the outer peripheral side wall of the base pin cover 12. The base pin cover 12 is attached to the opening 11 a of the base 11 so as to close the wiring space 11 d of the base 11.

  Next, an outline of the assembly process of the fluorescent lamp 1 will be described. The arc tube 2 is inserted into the insertion holes 11b, 11b of the arc tube 2, and the end of the arc tube 2 is fixed to the base 11 with an adhesive. Then, a temperature protection element 19 such as a temperature fuse is connected to the external lead wire 18 led out from the end of the arc tube 2. Here, two temperature protection elements 19 are provided, which are respectively disposed on the inner wall side of the base body 11 of the central separation wall 11c (see FIG. 4). The temperature protection element 19 is for preventing an excessive temperature rise at the end of the arc tube 2 at the end of the life of the fluorescent lamp 1. Subsequently, the external lead wire 12 is led out through the base pins 13... And the base pin cover 12 is put on the base base 11. In this case, the engagement recesses 12 a and 12 a formed on the outer peripheral side wall of the base pin cover 12 engage with the engagement protrusions 11 e and 11 e formed on the inner wall of the base base 11, whereby the base base 11 and the base pin The cover 12 is engaged. Therefore, the space formed by the base body 11 and the base pin cover 12 constitutes a wiring processing space such as the external lead wires 18. Finally, the cap pins 13... Are crimped with a punch to cut off the surplus portion of the lead-out end.

  Further, as shown in the cross-sectional view of FIG. 7, in a state where the base body 11 and the base pin cover 12 are engaged, the locking portions 17, 17 are fitted in the recesses 16, 16, and the locking portions 17, 17 The lower end surfaces 17a and 17a abut on the upper surfaces 16a and 16a of the recesses 16 and 16, respectively. Therefore, the base pin cover 12 is not only engaged by the engagement recesses 12a and 12a and the engagement projections 11e and 11e in the engagement relationship with the base body 11, but the locking portions 17 and 17 are formed in the recesses 16 and 16, respectively. By fitting, the movement of the base pin cover 12 in the direction of engagement with the base body 11 can be reliably prevented. In other words, even when a pressing force is applied to the base pin cover 12, it is possible to prevent the base pin cover 12 from being pressed into the base body 11. The lower end surfaces 17a and 17a of the locking portions 17 and 17 do not come into contact with the upper surfaces 16a and 16a of the concave portions 16 and 16, and a slight gap is allowed to exist.

  Next, another embodiment of the base will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same part as the above-mentioned embodiment, or the overlapping description is abbreviate | omitted. The difference from the above embodiment is that the central separation wall 11c of the base 11 is extended in the direction of the base pin 13. The extension wall 112 substantially bisects the wiring space 11d of the base 11 and the lower end 121 of the peripheral edge of the base pin cover 12 is brought into contact with the upper end 112a in the drawing. That is, according to this embodiment, in addition to the engagement portions 17 and 17 being fitted in the recesses 16 and 16, the base edge 121 of the base pin cover 12 is also brought into contact with the extension wall 112, so that the base The pin cover 12 is prevented from moving in the direction of engagement with the base body 11.

  Connection to the socket of the fluorescent lamp 1 configured as described above will be described with reference to a side view of FIG. The socket 20 is disposed in a lighting fixture and includes a socket base 21 and a guide plate 22. The socket base 21 is provided with four receiving terminals 21a... Corresponding to the cap pins 13 of the fluorescent lamp 1. In addition, guide portions 22b and 22b to which the positioning projections 14 and 14 of the base 10 are fitted are formed inside the both wings 22a and 22a of the guide plate 22.

  To connect the fluorescent lamp 1 to the socket 20, first, insert the cap pins 13... Of the fluorescent lamp 1 to the receiving terminals 21 a of the socket 20 in the arrow A direction. At this time, the protrusions 14 and 14 of the base 10 are guided to the guide portions 22b and 22b. From this state, the fluorescent lamp 1 is rotated in the direction of arrow B around the cap pins 13. Then, the other end of the fluorescent lamp 1 is attached to a lamp holder (not shown) disposed in the lighting fixture, and the connection to the socket 20 is completed.

  As described above, according to the present embodiment, the base 10 is composed of the base body 11 and the base pin cover 12, and the wiring processing space is formed between the base body 11 and the base pin cover 12. Wiring members such as lead wires and thermal fuses can be provided. Further, the engagement portions 17 and 17 of the base pin cover 12 are fitted into the recesses 16 and 16 of the base body 11, thereby reliably preventing the movement of the base pin cover 12 in the engaging direction to the base body 11. In the case where the base 10 is connected to the socket, the base pin cover 12 does not dip into the base 11 even if a pressing force is applied to the base pin cover 12. Therefore, it is possible to provide the base 10 and the fluorescent lamp 1 that are safe and do not impair the merchantability. In addition, in this configuration, that is, since the projections 14 and 14 are effectively used to form the recesses 16 and 16, the space in the base 10 is effectively used, so that the base configuration and the molding die Complexity can be avoided. In addition, since obstacles such as protrusions are not formed in the wiring space 11d of the base 11, workability of wiring processing work such as lead wires is not deteriorated.

  Next, an embodiment of the lighting fixture of the present invention will be described. Although illustration is omitted, the fluorescent lamp of the above-described embodiment can be arranged in a fixture body and configured as a lighting fixture. For example, the present invention can be applied to a lighting device for tunnels used indoors or outdoors. Therefore, according to such a lighting fixture, the lighting fixture which has the effect of the fluorescent lamp of the said embodiment can be provided.

It is a front view which shows embodiment of the fluorescent lamp of this invention. It is a perspective view which shows embodiment of the nozzle | cap | die for fluorescent lamps of this invention. It is a perspective view which decomposes | disassembles and shows the nozzle | cap | die for the fluorescent lamp. It is a top view of the nozzle | cap | die pin cover and nozzle | cap | die base of the nozzle | cap | die for the same fluorescent lamp. It is the same front view. It is the same side view. It is sectional drawing which shows embodiment of the nozzle | cap | die for fluorescent lamps of this invention. It is sectional drawing which shows other embodiment of the nozzle | cap | die for the same fluorescent lamp. It is a side view which shows the connection to the socket of the fluorescent lamp.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluorescent lamp 2 Light emitting tube 10 Base 11 Base base 11a Opening part 11d Wiring space 12 Base pin cover 13 ... Base pin 14, 14 Protrusion 16, 16 Recess 17, 17 Locking part

Claims (3)

A tubular base body having an arc tube fixed thereto and having a wiring space and an opening communicating with the wiring space;
A base pin cover which is engaged with the base and is attached to the opening so as to close the wiring space of the base, and in which the base pin is disposed;
A pair of protrusions protruding from the outer peripheral surface of the base body;
A recess formed to communicate with the opening toward the inside of the protrusion;
A pair of locking portions protruding from the outer periphery of the base pin cover and engaging with the recess;
A base for a fluorescent lamp, comprising: A base for a fluorescent lamp according to claim 1;
An arc tube fixed to the lamp base and having a bent discharge path;
A fluorescent lamp characterized by comprising: An instrument body;
A fluorescent lamp according to claim 2 disposed in the instrument body;
The lighting fixture characterized by comprising.

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