JPS643172Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a compact fluorescent lamp device suitable for use as a display pixel of a large display device, for example.

In recent years, they have been popular for their low power consumption and long lifespan.
Small, single-ended fluorescent lamp devices have been developed as display pixels for large display devices, but even if the conventional devices are small, they have a structure in which electrodes are provided at both ends of the bulb. When used in devices that require light to be emitted from one end of the bulb in the axial direction, such as a display pixel in a device, there is a problem in that the electrodes are in the shadow, impeding clear display.

In addition, when using small fluorescent lamp devices, especially in display devices installed outdoors, they are affected by temperature like other fluorescent lamps, and their starting characteristics are poor especially at low temperatures, making it difficult to produce sufficient light output. There was a problem that the discharge and light emission became unstable.

Therefore, the purpose of this invention is to configure a small, single-ended fluorescent lamp device suitable for display pixels for a display device, and to enable stable discharge and light emission without being affected by temperature. Our goal is to provide a structure that allows you to do this.

In order to achieve the above-mentioned object, this invention has a compact fluorescent lamp device equipped with a support stand provided with a plurality of terminals, and a small single-end type fixed to the support stand by connecting external lead wires to the terminals. It is composed of a fluorescent lamp and a protective tube fixed at the lower end to the support base, and the small fluorescent lamp is installed on a stem provided at the lower end inside the bulb via a pair of cathode supporting lead wires. The coiled filament-shaped cathode is configured to have a structure in which the anode is attached to the stem with a small distance from the cathode via an anode support lead wire that is shorter than the cathode support lead wire, and The protective tube is made of an opaque material with one end open.

An embodiment of this invention will be described in detail below based on the drawings. 1 and 2 show the entire compact fluorescent lamp device, and FIG. 3 shows a hot cathode type, single-ended compact fluorescent lamp 1 incorporated in this compact fluorescent lamp device. The diameter of the small fluorescent lamp 1 is approximately 9
It has a cylindrical valve 2 with a length of about 20 mm. A stem 3 is provided at one end inside the valve 2, and an exhaust pipe 4 connected to the stem 3 at its upper end is sealed at its lower end and hangs down to the outside of the valve 2. Three cathode supporting lead wires 5a, 5b and an anode supporting lead wire 5c are provided upright on the stem 3. A coil filament 6 coated with an electron emitting substance is installed between the cathode supporting lead wires 5a and 5b, and this coil filament 6 constitutes a cathode. On the other hand, the anode support lead wire 5
At c, an anode 7 is formed on the coil filament 6 at a small interval of about 3 mm. A getter 8 that emits mercury vapor by high temperature heating is attached to the anode support lead wire 5c. External lead wires 9a, 9b, and 9c are led out from the stem 3, and these external lead wires 9a to 9c are
Inside the stem 3, a cathode supporting lead wire 5a,
5b and anode support lead wire 5c, respectively. The other end of the bulb 2 is formed into a hemispherical shell shape, and a fluorescent substance 10 is attached to the inner surface from this end to the middle part.

The small fluorescent lamp 1 is supported on a support stand 11. As particularly shown in FIGS. 4 to 6, the support stand 11 has a circular base portion 11a and a support wall portion 11b formed around the periphery of the base portion 11a.
Three pin-shaped terminals 12 are inserted and fixed into the base portion 11a. The end of the bulb 2 of the small fluorescent lamp 1 is brought into contact with the end surface of the support wall 11b, and the external lead wires 9a to 9c are connected to terminals 12, respectively.
It is connected to the.

A metal reflector tube 13 is attached to the circumference of the small fluorescent lamp 1. The reflector tube 13 has a notch 13a and is formed to have a slightly smaller diameter than the outer diameter of the bulb 2, and is attached to the small fluorescent lamp 1 by utilizing its elastic force.

The small fluorescent lamp 1 further includes a protective tube 14 made of resin.
surrounded by. This protection tube 14 is attached to the support base 11. In detail below, the protective tube 14 has an elastic piece 15 at its end, as is clear from FIGS. 2 and 6 in particular. This elastic piece 15 has a protrusion 15a formed at its tip to protrude inward. When the protection tube 14 is inserted into the support wall portion 11b of the support base 11, the projection 15a hits the outer peripheral surface of the support wall portion 11b and the elastic piece 15 is elastically deformed. When the protective tube 14 is further pushed into the support base 11, the protrusion 15a enters the recess 11c formed at the peripheral edge of the base 11a of the support base 11, and the elastic piece 1
5 returns to its original shape. In this way, the protection tube 14 can be firmly attached to the support base 11 with a simple operation.

In the above configuration, mercury vapor is excited by the discharge between the coil filament 6, which is a cathode, and the anode 7, and emits ultraviolet rays, which is absorbed by the fluorescent material 10, and visible rays are emitted. The visible light is reflected by the reflecting tube 13 and blocked by the protective tube 14, so that it is concentrated in the axial direction of the arrow in FIG. 2 without being dispersed laterally.
Since the compact fluorescent lamp 1 is surrounded by the protective tube 14, there is little heat dissipation, so even when the external temperature is low, it can be turned on quickly and the temperature necessary for stable discharge can be secured.

Note that this invention is not limited to the above-mentioned embodiments and can be modified in various ways. For example, the protective tube 14 may be made of metal instead of resin.

As described above in detail, according to this invention,
The compact fluorescent lamp is firmly fixed to the support base and does not become unstable, and can be easily attached to the mounting base of a display device (not shown) using terminals. In addition, since no electrodes are provided on the side from which the light is emitted from the compact fluorescent lamp, the electrodes do not cast a shadow and a clear display can be produced. Furthermore, the compact fluorescent lamp can be surrounded by a protective tube to keep it warm, so that it is not affected by the external temperature, even when used in a display device installed outdoors, and it can light up quickly and discharge and emit light stably.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention, and Fig. 1 is a side view of a compact fluorescent lamp device, Fig. 2 is a sectional view taken along the line - in Fig. 1, and Fig. 3 is a partially cutaway view of the compact fluorescent lamp. 4 is a top view of the support base, FIG. 5 is a bottom view thereof, and FIG. 6 is an exploded perspective view of the small fluorescent lamp device. 1...Small fluorescent lamp, 9a, 9b, 9c...
External lead wire, 11... Support stand, 12... Terminal,
14...Protective tube.

Claims (1)

[Scope of utility model registration request] It consists of a support base provided with a plurality of terminals, a single-ended compact fluorescent lamp fixed to the support base by connecting external lead wires to the terminals, and a protective tube fixed to the support base at its lower end. , the small fluorescent lamp has a coiled filament cathode installed on a stem provided at the lower end of the bulb via a pair of cathode support lead wires, and a coil filament cathode that is also shorter than the cathode support lead wires on the stem. The anode is attached to the cathode at a small distance via an anode support lead wire, and the protective tube is made of an opaque material with one end open. A small fluorescent lamp device.