JP2564841Y2 - Light source device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel light source device incorporating a rare gas discharge lamp with an outer wall electrode.

[0002]

2. Description of the Related Art In general, rare gas discharge lamps have a small outer diameter and are rare gas discharges. Therefore, they are characterized in that their brightness and discharge voltage are hardly affected by the ambient temperature and their life is long. It has been used as a light source for reading originals of equipment and as a backlight for liquid crystal devices.

However, a conventional rare gas discharge lamp has a pair of electrodes sealed at both ends of an elongated glass bulb and an outer wall of the glass bulb between both electrodes, as disclosed in, for example, Japanese Patent Application Laid-Open No. 62-281256. The auxiliary electrode is attached closely to the electrode, and the positive column is deflected to the auxiliary electrode side, so the excitation efficiency of the phosphor film is poor, and it is difficult to obtain a bright one, and the discharge is unstable. It was something.

Therefore, the applicant of the present invention has proposed a technique as shown in FIG.
A rare gas containing xenon gas as a main component is sealed in a tubular glass bulb 2 having a phosphor film 1 adhered to an inner wall thereof at a predetermined pressure, and a pair of strip electrodes 3A facing the outer wall of the glass bulb 2 are sealed. And the outer wall electrode type rare gas discharge lamp 4 having the 3B structure.

The rare gas discharge lamp 4 of the outer wall electrode type having such a structure has a high-frequency high voltage, for example, 30K, between the strip electrodes 3A, 3B.
When HZ, 2 KV is marked, a discharge of xenon gas is generated in the discharge space of the glass bulb 2 between the two strip electrodes 3A, 3B to excite the phosphor film 1 to emit visible light.
This rare gas discharge lamp 4 with an outer wall electrode is composed of two strip electrodes 3A, 3B.
When the area is formed to have a certain width, a stable discharge is obtained, and the illuminance is remarkably bright.

[0006]

The rare-gas discharge lamp 4 having the above-mentioned characteristics and being excellent in its characteristics, when it is incorporated in a lighting circuit as a light source device, has a high mark or voltage. It is difficult to connect to the circuit by taking the following measures.For example, in the past, the lead wire was soldered on the electrode and the circuit was connected, so the connection part needed to be further insulated, and the electrode was covered with insulation. For example, assembling the light source device required a lot of man-hours.

Accordingly, the present invention has been made in view of the above, and an object of the present invention is to provide an assembly structure in which an outer wall electrode type rare gas discharge lamp light source device can be easily assembled and has good insulation.

[0008]

In order to achieve the above object, the present invention provides a pair of electrode terminals for elastically supporting the outer wall electrode of the rare gas discharge lamp from both sides on a circuit board having a lighting circuit incorporated therein. The outer walls of both strip electrodes of the rare gas discharge lamp are sandwiched between the electrode terminals. Further, the circuit board and the discharge lamp assembled in this manner are covered with a resin compound except for the light emitting portion of the discharge lamp.

[0009]

In the light source device having such a structure, the circuit connection and assembly of the electrodes are extremely easy by sandwiching the outer walls of the two strip electrodes of the rare gas discharge lamp between the electrode terminals of the circuit board, and the connection portion is also made of resin. Good insulation is provided because it is covered with the compound made of the resin. Further, in the light source device, the circuit board and the electrode portion of the discharge lamp are not exposed except for the light emitting portion of the discharge lamp, so that electric shock is prevented during use and safety is ensured.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 2 is a perspective view showing an assembled state of the rare gas discharge lamp 4 of the outer wall electrode type of the light source device 11 according to the present invention.
In the figure, reference numeral 12 denotes a small circuit board on which a lighting circuit component 13 composed of an electronic component such as a semiconductor device and a pair of electrode terminals 14A and 14B for connecting the rare gas discharge lamp 4 are mounted. The electrode terminals 14A and 14B are formed by forming a conductive elastic metal plate such as nickel or phosphor bronze into an arc shape.
As shown in FIG. 3, the glass bulbs of the rare gas discharge lamp 4 are arranged opposite to each other so as to sandwich the glass bulb from both sides.

In the light source device 11 having such a structure, the rare gas discharge lamp 4 is disposed between the arc-shaped sections of the pair of electrode terminals 14A and 14B.
By attaching both band-shaped electrodes 3A and 3B on the outer wall of the glass bulb, the electrode connection of the discharge lamp 4 and the assembly of the discharge lamp are performed at the same time. The electrode terminals 14A, 14 of this discharge lamp 4
In the case of assembling with B, since both band-shaped electrodes 3A and 3B are formed in a band shape along the outer wall of the glass bulb 2, the axial position of the glass bulb can be freely set. The illustrated pair or a plurality of pairs as necessary can be provided at appropriate positions and can be easily mounted.

FIG. 4 shows the circuit board 12 of the light source device 11.
The mounting part of the rare gas discharge lamp 4 is made of a resin compound 15
1 shows a perspective view of a light source device 16 covered with. This light source device 16 is obtained by covering the entire circuit board 12 including one end mounting portion of the rare gas discharge lamp 4 with a resin compound 15, and has insulation of electrode connection portions, which is suitable for a copying machine or a light source for reading a document. . If the uncoated rare gas discharge lamp 4 is covered with a transparent resin cap (not shown), the entire surface of the rare gas discharge lamp 4 including the strip electrodes 3 is insulated.
For example, it can be used as an instruction light source.

FIG. 5 shows a light source device 1 in which the circuit board 12 and the entire rare gas discharge lamp 4 are covered with a resin compound 15 except for the light emitting portion of the rare gas discharge lamp 4 of the light source device 11.
7 shows a perspective view of FIG. The light source device 17 is insulated as a whole, including the rare gas discharge lamp 4 of the light source device 17, similarly to a normal light source device, and handling of the device is safe. Can be mounted on equipment. In this case, if the length of the rare gas discharge lamp 4 is shortened and reduced in size, it can be used as a night sphere of a lighting fixture.

[0014]

[Effects of the Invention] As described above, in the present invention, the electrode terminals for elastically supporting the outer wall electrodes of the rare gas discharge lamp from both sides are arranged on the circuit board in which the lighting circuit is incorporated. Because it was configured to be clamped from above the strip electrode, electrode connection,
Incorporation of a rare gas discharge lamp can be made extremely simple. Also,
Since the built-in circuit board and discharge lamp are covered with a resin compound leaving the light-emitting part of the discharge lamp, insulation of the device is ensured, and handling is as safe as normal light source devices. Can be.

[Brief description of the drawings]

FIG. 1 is a partially cutaway sectional view of an outer wall electrode type rare gas discharge lamp used in the light source device of the present invention.

FIG. 2 is a perspective view showing an assembled state of the light source device according to the embodiment of the present invention;

FIG. 3 is a side view showing a state where the rare gas discharge lamp of the electrode terminal of FIG. 2 is mounted.

FIG. 4 is a perspective view of a light source device according to another embodiment of the present invention.

FIG. 5 is a perspective view of a light source device according to another embodiment of the present invention;

[Explanation of symbols]

 3A, 3B Outer wall electrode 4 Rare gas discharge lamp 11, 16, 17 Light source device 12 Circuit board 13 Circuit component 14A, 14B electrode terminal 15 Resin compound

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H05B 41/00 H05B 41/00 A

Claims (2)

(57) [Scope of request for utility model registration] 1. A light source device wherein arc-shaped electrode terminals are provided on a circuit board in which a lighting circuit is incorporated, and an outer wall electrode of a rare gas discharge lamp is elastically supported from both sides. . 2. The light source device according to claim 1, wherein a connection portion between the circuit board and the discharge lamp is covered with a resin compound except at least a light-emitting portion of the rare gas discharge lamp.