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Light receiver device having a shielding device extending on a back side of a substrate

A shielding device and light receiving technology, which is applied to fire alarms, instruments, alarms, etc., to achieve the effect of improving rigidity and simplifying installation

Active Publication Date: 2011-09-28
SIEMENS SWITZERLAND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this measure is not sufficient for some smoke alarms, which have particularly sensitive photoreceptors

Method used

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  • Light receiver device having a shielding device extending on a back side of a substrate
  • Light receiver device having a shielding device extending on a back side of a substrate
  • Light receiver device having a shielding device extending on a back side of a substrate

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Embodiment Construction

[0054] It should be pointed out here that the reference signs of identical or mutually corresponding elements in the figures differ only in their first numerals.

[0055] Furthermore, it should be pointed out that the embodiments described below are only selected from the possible embodiments of the present invention. It is especially possible that the features of the individual exemplary embodiments can be combined with one another in a suitable manner, so that a person skilled in the art can regard many different exemplary embodiments as obviously disclosed with the aid of the exemplary embodiments described in detail here.

[0056] figure 1 The configuration of the shielding device 150 on the base 110 of the smoke alarm 100 is shown. This base 110 has a mechanical carrier element 110a and a circuit board, wherein the circuit board is figure 1 Not visible in perspective view of .

[0057] A hook 112 is formed on the mechanical support element 110 a and is used to fasten a...

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PUM

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Abstract

The invention relates to a light receiver device (140), particularly provided for a smoke detector (100). The light receiver device (140) comprises a flat substrate (110, 210, 310), a light receiver (142) mounted on a front side of the substrate (110, 210, 310), and a shielding device (150) present on at least a back side of the substrate (110, 210, 310) opposite the front side. The shielding device (150) is designed such that it at least partially shields against electromagnetic interference radiation impinging on the light receiver (142) through the substrate (110, 210, 310). False alarms are thereby reduced, while the sensitivity of the light receiver is simultaneously increased. The shielding device comprises a metal strip inserted through the substrate from the front side to the back side, and bent over a recess on the back side provided therefor, so that the light receiver is protected against interference radiation even on the back side. The invention further relates to an assembly method for producing a light receiver device (140).

Description

technical field [0001] Generally speaking, the invention relates to the technical field of shielding optical receivers from electromagnetic interference radiation. In particular, the invention relates to a light receiving device, in particular for an optical smoke detector, having a light receiver and a shielding device, which are arranged on a common base. The present invention also relates to a mounting method for manufacturing a light-receiving device of the above-mentioned type. Background technique [0002] In order to be able to detect undesired dangerous situations in advance, such as the occurrence of a fire, hazard alarms are often used which are installed at suitable points in the monitored danger zone, for example in a building. The hazard alarm can also be part of a hazard warning system or a comprehensive building management system, which has several peripheral units in addition to the switchboard. These peripheral units can be connected to the switchboard via...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08B17/107G08B29/18
CPCG08B17/107G08B29/18G08B17/113Y10T29/49826
Inventor U 里迪
Owner SIEMENS SWITZERLAND