CN2154535Y

CN2154535Y - Micro-current control switch

Info

Publication number: CN2154535Y
Application number: CN 93208802
Authority: CN
Inventors: 江新阶
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-07
Filing date: 1993-04-07
Publication date: 1994-01-26
Anticipated expiration: 2003-04-07

Abstract

The utility model relates to a micro-current control switch, in particular to a micro-current control switch used on an anti-theft alarm device. It includes a DC meter head and a normally closed switch, which are mounted in the same shell. A current-limiting resistor is connected in series in the series circuit of the control current coil, and the movable arm of the normally closed switch is a binding post rotating along with the control current coil. When no current passes through the control current coil, the normally closed switch is closed; when current flows, the normally closed switch movable arm swings along with the control current coil to be separated from the fixed contact of the switch, and the switch is in an off state. The control current can be as small as a mua level.

Description

Micro-current control switch

The utility model relates to a kind of little current-controlled switch, little current-controlled switch of particularly using on burglar alarm.It includes direct current gauge outfit and normally closed switch.

Present various motor switch all can not be used little Current Control.

Task of the present utility model provides a kind of switch of little Current Control, and its Control current can be little of μ A level, is particularly suitable for being used on the burglar alarm.

Task of the present utility model is finished as follows, it includes a direct current gauge outfit and a normally closed switch, they are contained in the same housing, in the sequential circuit of Control current coil, be serially connected with a current-limiting resistance, the lever arm of normally closed switch is the binding post that rotates with the Control current coil, when no current passes through the Control current coil, the normally closed switch closure, when electric current passes through, the Control current coil lead is the normally closed switch lever arm breaks away from switch with the swing of Control current coil a fixed contact, switch is off-state, and its Control current can be little of μ A level.

Concrete structure of the present utility model and operating position are provided by following examples and accompanying drawing thereof.

The decline internal structure schematic diagram of current-controlled switch of a kind of magnetoelectricity that Fig. 1 provides for the utility model.

Fig. 2 is that little current-controlled switch is as the electrical schematic diagram in the burglar alarm.

Below in conjunction with accompanying drawing the structure of little current-controlled switch and the operating position on burglar alarm are further described.

In Fig. 1,1-current-limiting resistance R, the last hairspring of 2-, 3-Control current coil L, 4-permanent magnet, 5-hairspring elastic force adjustable plate, 6-Control current coil lead, 7-dead axle screw, 8-housing, the 9-iron skeleton, 10-rotation axis, 11-iron skeleton, another binding post of 12-Control current coil (being the normally closed switch lever arm), the fixed contact of 13-normally closed switch (being normally closed switch binding post G3), hairspring under the 14-, 15-binding post G1,16-binding post G2.

The utility model can not only constitute (see figure 1) by the gauge outfit of magneto-electric, and is also suitable to the gauge outfit of electrodynamic type, electromagnetic type.

In Fig. 2, warning thin copper wire TT ' and G1, the G2 of this switch are serially connected in power supply E upward (saving No. 5 batteries with two gets final product).Under the normal condition, Control current coil L has electric current to pass through, the normally closed switch lever arm is the Control current coil lead | 12| breaks away from the fixed contact of normally closed switch | and 13|, when the warning thin copper wire disconnects, Control current coil L no current passes through, the normally closed switch closure (be the Control current coil lead | the fixed contact of 12| and normally closed switch | the 13| closure, control acoustic luminous device Y by normally closed switch and send chimes of doom and light.

Claims

1, a kind of little current-controlled switch, it includes one by binding post G2, last hairspring [2], Control current coil lead [6], Control current coil L[3], another binding post of Control current coil [12], direct current gauge outfit and a normally closed switch that following hairspring [14] and binding post G1 form, it is characterized by: normally closed switch is to be contained in the same housing [8] with the direct current gauge outfit, in the sequential circuit of Control current coil L, be serially connected with a current-limiting resistance R[1], the lever arm of normally closed switch [12] is that normally closed switch is by binding post G1 with another binding post of Control current coil of rotation axis [10] rotation of Control current coil L, following hairspring [14], the Control current coil lead is that the lever arm [12] of normally closed switch and the fixed contact [13] of normally closed switch are that normally closed switch binding post G3 forms.