Joint gap adjusting method of flate-type siren and its adjusting clamp

Abstract

To provide a technology by which even an inexperienced inspector can easily adjust a contact point gap of a flat type alarm device. SOLUTION: In Fig.(a), when a movable iron core 27 is advanced by an amount of a target contact point gap by pushing with an outer case 72, a gap d2 still remains between a kick member 28 and a movable contact point lever 18, if the contact point gap before adjustment is large. As contact points 16 and 17 are closed, a lamp 111 keeps lighting on. In Fig.(b), if an adjusting screw 14 is kept turning right, the movable contact point lever 18 stops moving by hitting the kick member 28, but a fixed contact point lever 15 keeps on moving and the fixed contact point 16 is slightly separated from the movable contact point 17. As soon as it is separated, the lamp 111 turns off. The inspector turns the adjusting screw 14 right, if the lamp 111 is lighted on, and stops turning the adjusting screw 14 immediately after lighting off of the lamp 111.

Description

technical field [0001] The invention relates to the contact gap adjustment technology of a flat alarm. Background technique [0002] Inexpensive and simple horns are widely used as devices for generating warning sounds (for example, refer to Patent Document 1). [0003] [Patent Document 1] Japanese Unexamined Publication No. 2001-287588 ( figure 1 ) [0004] In Patent Document 1 figure 1 Among them, 2 is a vibrating plate, 3 is a fixed iron core, 4 is a movable iron core, 4b is a stepped part set on the movable iron core 4, 6 is an excitation coil, 7 is a fixed contact, 8 is a movable contact, 8a is a supporting movable The contact plate of the moving contact 8, 9 is the resonant plate, and G is the air gap. [0005] When the excitation coil 6 is energized, the movable iron core 4 is attracted by the fixed iron core 3 and moves downward in the figure. With this movement, the stepped portion 4b hits the contact plate 8a and moves downward in the figure. [0006] When th...

AI Technical Summary

Problems solved by technology

[0014] However, since the inspector decides to turn the adjustment screw to the right or left based on the sound he hears, it takes time for inexperienced inspectors to adjust.

That is, skilled inspectors are required

[0015] In addition, when the part accuracy or assembly accuracy is poor, and the deviation of the contact gap is large, it takes time to adjust even for skilled inspectors.

[0016] And, as in Patent Document 2 Image 6 As shown, the part of the contact gap after assembly is inside the flat electric alarm 1, and it is difficult to visually inspect

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