Electric discharge tube, stroboscopic device using the tube, and camera
A technology of discharge tube and main electrode, applied in the field of discharge tube, can solve the problem that the strength of the glass shell cannot be obtained, etc.
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Embodiment approach 1
[0024] Fig. 1 is a sectional view of a discharge tube according to Embodiment 1 of the present invention. The discharge vessel comprises a glass envelope 1 made of borosilicate hard glass and main electrodes 2, 3 sealed at both ends of the glass envelope. The main electrode 2 is a cathode connected to the low-voltage side of a main discharge capacitor for supplying luminescence energy described later, and is composed of a metal body 4 and a sintered body 5 . The main electrode 3 is the anode connected on the high voltage side of the above-mentioned main discharge capacitor. The metal body 4 is sealed at the end of the glass envelope 1 to form the main electrode 2 and is the lead-in line for the electrical power input for luminescence. The sintered metal body 5 is installed on the front end of the metal body 4 positioned in the glass shell 1 by riveting or welding to form the electrode 2, and the bead glass 6 seals the metal body 4 on the end of the glass shell 1, and the bead...
Embodiment approach 2
[0060] FIG. 8 is a perspective view of a photographic flash device 22 according to Embodiment 2.
[0061] On the flash device 22, pack the DC power supply with the light-emitting test circuit of Fig. 5, and the main discharge capacitor is used for making necessary circuits and components of the discharge tubes such as trigger circuits and discharge tubes and reflectors shown in Fig. 7. Since the discharge tube and the reflector are small as described above, the photographic flash device in this embodiment is also downsized along with the miniaturization. The flash device 22 includes a light emitting panel 21 shown in FIG. 7 and a mounting portion 23 for mounting on a photographic camera.
Embodiment approach 3
[0063] Fig. 9 is a perspective view of a photographic camera according to Embodiment 3 incorporating the discharge tube configuration of the present invention. The camera 24 includes: a lens 25, the above-mentioned light-emitting panel 26 installed on the front of the reflective umbrella incorporating the discharge tube, a rangefinder 27, a shutter button 28 and other operating switches and circuits not shown in the figure. The camera may be either a camera using silver halide film or a so-called digital still camera that performs electronic recording on a recording medium such as a CCD.
[0064] The photographic flash device and photographic camera shown in FIGS. 8 and 9 are more compact in size as the reflector of the discharge tube becomes smaller, and are more excellent in portability.
[0065] Also, even when space is required for adding new functions, there is no need to increase the volume of the flash device and the main body of the photographic camera. In this camera...
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Abstract
Description
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Application Information
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