Unlock instant, AI-driven research and patent intelligence for your innovation.

Photoelectric smoke detector

A smoke detector, photoelectric technology, applied in the direction of instruments, alarms, fire alarms, etc., can solve the problems of increasing assemblers, unable to remove stray light, etc., achieve the effect of reducing man-hours, reducing the number of parts, and easy manufacturing

Active Publication Date: 2011-06-01
NOHMI BOSAI LTD
View PDF1 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Conventional photoelectric smoke detectors have the problem of not being able to remove a certain amount of stray light because they only have one hole.
[0007] In addition, when assembling the optical system of the conventional photoelectric smoke detector, as mentioned above, since it is necessary to separately assemble the processing PD and the shield box, the assembly man-hours inevitably increase.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Photoelectric smoke detector
  • Photoelectric smoke detector
  • Photoelectric smoke detector

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] figure 1 (a) and (b) are the external view of the photoelectric smoke detector according to one embodiment of the present invention and its b-b sectional view. figure 2 and image 3 yes figure 1 An exploded perspective view of a photoelectric smoke detector. figure 2 is a perspective view when viewed from above, image 3 It is a perspective view when viewed from below. In addition, in figure 1 In (b), some internal parts are omitted.

[0030] The photoelectric smoke detector includes: a main body 1 equipped with electronic parts for detecting fire and driving an alarm speaker (details are not shown); a cover (protective cover) 2 covering the main body 1; Ending at the back of the main body 1, there are screw holes for installation to the ceiling, etc., and a dark box 4 is accommodated between the main body 1 and the cover 2, and the dark box 4 is equipped with parts that function as a smoke detector (details will be described later). The cover 2 has a plurality...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention provides a photoelectric smoke detector, capable of removing certain stray light. The detector has a black box (4) provided with a luminous element containing section (45) for containing LED (60) as luminous element; and holes arranged in front of the luminous element containing section (45); the holes include a plurality of holes (61, 62) having different distances to the LED (60), and opening sizes of the holes in width direction increase proportionally to increase of the distances to the LED (60).

Description

technical field [0001] The invention relates to a photoelectric smoke detector, in particular to the structure of the hole arranged in front of the light-emitting element. [0002] In addition, the present invention relates to a photoelectric smoke detector, and particularly relates to the structure of a shield box for accommodating a light receiving element. Background technique [0003] In the photoelectric smoke detector, a light-emitting element storage section is provided in the dark box for accommodating light-emitting diodes (hereinafter also referred to as LEDs) as light-emitting elements, and a hole is provided in front of the storage section for limiting The direction of travel of the light emitted by the LED. [0004] In addition, in the photoelectric smoke detector, the photosensitive diode (hereinafter referred to as PD) as the light receiving element receives the weak scattered light caused by the smoke for smoke detection, so in order to prevent it from being...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G08B17/107
Inventor 冈田昭雄
Owner NOHMI BOSAI LTD