JPH0718339U - Straight tube fluorescent lamp - Google Patents

Abstract

(57) [Summary] [Structure] Contact portions that project in the radial direction from the outer peripheral surface of the base at both ends of the straight pipe type valve, a flange portion that is expanded to the back side of the outer peripheral surface of the base, and the base end surface or peripheral surface. And a contact piece provided so as to be exposed to the outside. The lead wire is soldered to the contact piece on the outer surface of the contact piece. [Effect] The total length of the lamp can be shortened, and it is possible to sufficiently resist the force of the bulb rotating. Moreover, the power supply terminal can be prevented from falling off, and the lead wire can be easily connected. These effects can be obtained even if there is a slight displacement in the valve axial direction.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a straight tube fluorescent lamp having an improved base structure.

[0002]

[Prior art]

 In general, a straight tube type fluorescent lamp has a base attached to both ends of a straight tube type glass bulb, and a power supply terminal protruding in the axial direction of the tube, that is, a base pin is provided on the end face of the base, and the base pin is To be mechanically and electrically connected to the instrument via.

[0003]

[Problems to be solved by the device]

 However, in a fluorescent lamp having such a base pin, the lamp length is increased by the protrusion amount of the base pin, so that not only the size of the fixture is increased but also the effective light emission length is shortened.

More specifically, FIG. 1 shows an aperture type straight tube fluorescent lamp used in a copying machine. In this fluorescent lamp, caps 2 and 2 are attached to both ends of a straight tube type glass bulb 1, and cap pins 3 projecting in the tube axial direction are provided on the end faces of these caps 2 and 2. . On the inner peripheral surface of the glass bulb 1, as shown in a sectional view in FIG. 3, a phosphor coating 4 is formed, and on the inner surface of the phosphor coating 4, a reflective coating 5 is formed at a predetermined angle. There is. The light emitted by the light emission based on the discharge between the electrodes 6 and 6 is reflected by the reflective coating 5 and is applied to the illuminated surface from the window 7 where the reflective coating 5 is not formed. As for the illuminance distribution on the irradiated surface, the relative light output decreases at the tube end, as shown in FIG. Such a reduction in the relative light output at the tube end limits the effective width of copying, and therefore an improvement in the relative light output at the tube end is required.

As a countermeasure for this, it is conceivable to lengthen the tube length of the bulb 1. However, in the fluorescent lamp having the base pins 3 as shown in FIG. 1, the equipment for supporting the lamp becomes large and the entire copying machine. Also becomes larger.

On the other hand, if the base pins 3 ... Are eliminated, the bulb length can be extended by the protruding length of the base pins 3, and the effective light emission length is maintained while the lamp total length L remains the same as the conventional length. It is possible to increase the relative light output at the tube end, that is, as shown by the phantom line in FIG.

As an alternative to the cap pin projecting in the tube axis direction, it is conceivable to arrange the power supply terminals on the outer peripheral surface of the insulating base attached to both ends of the valve 1. As such, the technology of Japanese Utility Model Publication No. 36-22239 is already known. However, since this structure has a structure in which the power supply terminal is screwed to the insulating base, it is troublesome to assemble, and there are drawbacks that the screw is easily loosened and the power supply terminal is easily separated from the base. The present proposal was made under these circumstances, and its purpose is to provide a straight-tube fluorescent lamp in which the power supply terminal can be easily assembled to the insulating base and the power supply terminal is hard to separate from the base. Is to provide.

[0008]

[Means for Solving Problems]

 The straight-tube fluorescent lamp of the present invention comprises an electrode at both ends and a straight-tube bulb having lead wires connected to the electrodes; and a pair of tubular insulating lamps attached to both ends of the straight-tube bulb. An edging base; and a pair of power supply terminals attached to each base; the power supply terminals project radially from the outer peripheral surface of the base, and are the same in the axial direction of the cylindrical insulating base. A contact part having an outer surface shape; a flange part that is continuous from the root of this contact part in parallel with the axis of the base, and is expanded to the back side of the outer peripheral surface of the base; A contact piece formed so as to extend parallel to the end surface or the peripheral surface and provided so as to be exposed at the base end surface or the peripheral surface; and the contact piece has a connection hole penetrating the front and back surfaces of the contact piece. However, the base has a conduction hole on the end surface or the peripheral surface facing the connection hole, Serial lead is characterized by being soldered to the contact piece on the outer surface of the contact piece through the connecting hole and through hole.

[0009]

[Action]

 Since the power supply terminal is formed on the outer peripheral surface of the base, the total length of the lamp is shorter than that when the pins are formed on the end surface. In addition, since the power supply terminal projects in the radial direction from the outer peripheral surface of the base as well, it is a structure that can sufficiently oppose the force that the valve tries to rotate by the amount of the projection. Therefore, positional deviation and rotational deviation of the valve can be reduced. Further, since the widened flange portion is formed on the back side of the outer peripheral surface of the base, the power supply terminal can be prevented from falling off due to the torque applied to the protruding portion. Furthermore, the contact piece is formed with a connection hole penetrating the front and back of the contact piece, and the base is provided with a conduction hole facing the connection hole on the end face or the peripheral surface, and the contact piece is exposed on the base end face or the peripheral surface. Therefore, the lead wire can easily penetrate the connection hole and the conduction hole, and can be easily soldered to the contact piece on the outer surface of the contact piece. And, these effects can be obtained even when the valve is axially displaced, because the outer surface shape of the contact portion is the same in the axial direction of the cylindrical insulating base.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS.

FIG. 4 shows one end of a straight tube type fluorescent lamp, and 10 is a base attached to the end of the straight tube type glass bulb 1 with an adhesive agent (not shown). The base 10 is formed of a flame-retardant insulating material such as bakerite or nylon resin into a cylindrical shape. On the peripheral surface of the base 10, for example, fitting grooves 11 1, 11 are formed so as to face each other at target positions. These fitting grooves 11, 11 are continuously opened over the axial end surface and the radial outer peripheral surface of the base 10. Guide grooves 12 are formed along the axial direction at the bottoms of the fitting grooves 11 and 11, and the width of these guide grooves 12 ... Is larger than the width of the opening of the fitting groove 11. Largely formed. The fitting groove 11 may be a dovetail groove instead of the guide groove 12 as long as the fitting groove 11 has a shape in which the center side (bottom side) is expanded more than the outer shape side. .

The power supply terminals 14 and 14 are press-fitted into the fitting groove 11 as described above. The power supply terminals 14 and 14 are made of a conductive material such as copper or a copper alloy, and are formed by pressing a plate material as shown in FIG. That is, the power supply terminal 14 has the flange portion 15 and the contact portion 16 protruding from the flange portion 15.

The power supply terminal 14 is attached to the fitting groove 11 by press-fitting the flange portion 15 into the guide groove 12. That is, the power supply terminal 14 is pushed in from the axial end surface side of the base 10 with the flange portion 15 thereof facing the guide groove 12. At this time, if the width of the flange portion 15 is formed to be slightly larger than the width between the guide grooves 12 and the power supply terminal 14 is press-fitted, the flange portion 15 is slightly elastically returned to the base portion. The power supply terminal 14 is fixed to the base 10. The outer end surface of the contact portion 16 of the power supply terminal 14 mounted as described above projects outward from the outer peripheral surface of the base 10. When the lamp is inserted into the appliance in a direction perpendicular to the axial direction, that is, in the direction of arrow A in FIG. 5, such a contact portion 16 is elastic to the receiving brackets 17, 17 on the appliance side shown in FIG. Sandwiched between. Therefore, the metal fittings 17 and 17 and the contact portions 16 of the power supply terminals 14 and 14 electrically contact each other, and the metal fittings 17 and 17 support the lamp.

Connection holes 18 and 18 are formed in the flange portions 15 and 15 of the power supply terminals 14 and 14, respectively, and the external holes connected to the electrode 6 (shown in FIG. 1) are connected to the connection holes 18 and 18. The lead wires 19 and 19 are guided through the through holes 20 and 20 formed in the base 10 and are connected by solder (not shown).

In the straight-tube fluorescent lamp having such a structure, since the power supply terminals 14 and 14 are arranged on the outer peripheral surface of the base 10, there is no base pin protruding in the axial direction at the tube end unlike the conventional case. Therefore, even if the bulb length is increased by the protrusion of the base pin, the total length L of the lamp does not increase, and the relative light output at the tube end can be improved by the length of the bulb, resulting in effective light emission. Length increases. Moreover, in this product, the base 10 and the fitting grooves 11, 11 can be molded by resin, and the feeding terminal 14 can be press-molded. In addition, the feeding terminals 14, 14 can be fitted in the fitting groove of the base 10. It can be assembled simply by press-fitting into 11, 11, and is extremely easy to assemble, which is suitable for mass production. Since the power supply terminals 14, 14 fitted by press fitting are elastically attached to the base 10, they do not come off even if shock or vibration is applied. Because of this, it can be manufactured at low cost.

In the above embodiment, the external lead wires 19 and 19 are connected to the connection holes 18 and 18 formed in the flange portion 15 of the power supply terminals 14 and 14 through the conduction holes 20 and 20 formed in the peripheral surface of the base 10. Although soldering is performed, the present invention is not limited to this, and may be configured as in the other embodiments shown in FIGS. 8 and 9. That is, in this one, a connection piece 21 extending to the end face of the base 10 is formed in the flange portion 15, a connection hole 18 is opened in this connection piece 21, and external lead wires 19 and 19 are provided on the end face wall of the base 10. It is guided through the opened conduction holes 20, 20 and connected by solder not shown.

Further, the power supply terminal 14 is not limited to a plate material formed by pressing, but may be formed in a solid shape such as swaging, and as described above, the fitting groove 11 is formed. If the dovetail groove is formed, no flange 12 is not required.

Furthermore, the present invention is not limited to the aperture type fluorescent lamp used as the light source of the copying machine, and can be implemented even for the straight tube fluorescent lamp used in a general household. is there.

[0019]

[Effect of device]

 According to the present invention, the total length of the lamp can be shortened, the rotational displacement and the positional displacement of the bulb can be reduced, and even if the axial positional displacement occurs, the connection can be securely held. In addition, it is possible to provide a high-quality straight tube fluorescent lamp that is easy to connect to the lead wire of the power supply terminal and yet does not drop the power supply terminal.

[Brief description of drawings]

FIG. 1 is a front view of a conventional straight tube fluorescent lamp.

FIG. 2 is a light distribution characteristic diagram of a conventional straight tube fluorescent lamp.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a perspective view of an end portion of a straight tube fluorescent lamp according to an embodiment of the present invention.

FIG. 5 is a side view of an end portion of a straight tube fluorescent lamp according to an embodiment of the present invention.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a perspective view of a power supply terminal.

FIG. 8 is a side view of a straight tube fluorescent lamp according to another embodiment of the present invention.

9 is a sectional view taken along line IX-IX in FIG. 1 ... Valve, 10 ... Base, 11 ... Fitting groove, 12
… Guide groove, 14… Power supply terminal, 15… Flange part,
16 ... Contact part

Claims (1)

[Scope of utility model registration request] 1. A straight-tube valve having electrodes at both ends and lead wires connected to the electrodes; a pair of cylindrical insulating bases attached to both ends of the straight-tube valve; A pair of power supply terminals attached to the base; the power supply terminals projecting in the radial direction from the outer peripheral surface of the base and having the same outer surface shape in the axial direction of the cylindrical insulating base. And a flange portion that extends continuously from the base of this contact portion in parallel with the axis of the base, and expands on the back side of the outer peripheral surface of the base; and extends from the base of this contact portion in parallel with the end surface or peripheral surface of the base. A contact piece formed so as to be exposed on the base end surface or the peripheral surface; and the contact piece has a connection hole penetrating the front and back surfaces of the contact piece,
The base has an end face or a peripheral face with a conduction hole facing the connection hole, and the lead wire penetrates the connection hole and the conduction hole and is soldered to the contact piece on the outer surface of the contact piece. A straight tube fluorescent lamp.