CN102036440A

CN102036440A - Sensor type door lamp control switch

Info

Publication number: CN102036440A
Application number: CN2010102896148A
Authority: CN
Inventors: 吕海涛; 史大勇
Original assignee: Hamlin Electronics Suzhou Co Ltd
Current assignee: Hamlin Electronics Suzhou Co Ltd
Priority date: 2010-09-25
Filing date: 2010-09-25
Publication date: 2011-04-27

Abstract

The invention relates to a sensor type door lamp control switch which is characterized by comprising a sensor and a trigger magnet. The sensor and the trigger magnet are respectively arranged on two relatively moving members; a sensor circuit is arranged in the sensor and comprises a normally open reed switch used as a sensing element, a bidirectional thyristor for controlling the ON and OFF of a lighting circuit, and a capacitance-type resistor; the normally open reed switch is connected between a T1 pole and a gate pole of the bidirectional thyristor; the members are a box body and a box door; the sensor is fixed to the open periphery of the box body; and the trigger magnet for controlling the ON and OFF of the normally open reed switch is arranged at the corresponding position on the inner side of the box door. The reed switch and the capacitance-type resistor form a control loop, when the trigger magnet approaches to the sensor, the normally open reed switch is closed, the bidirectional thyristor is switch off due to no trigger signals coming from the gate pole, the lighting circuit is off, and thus, the non-contact type control of the door lamp is completed, the mechanical wear of a switch key is reduced, and the service life of the control switch is prolonged.

Description

A kind of sensor type gate light control switch

Technical field

The present invention relates to a kind of trigger-type controllable switch, especially relate to a kind of can control also and can avoid button the sensor type gate light control switch of mechanical wear to occur by magnetic field.

Background technology

Disclosed in the market a kind of patent No. is 94227773.2 contact bridge type door lamp switch, by terminals, touch bridge, compression spring, push silver contact strong and riveted joint and form, when door is opened, push and be good for when not being pressed, switch is by touching the bridge conducting, the external modulation circuit turn-on, bulb plays illuminating effect; Close when door, when pushing strong being pressed, touch bridge and binding post and disconnect, external circuit disconnects, bulb does not play a role in lighting, like this, and in the each luminous lamp switch of control, all must press the triggering button, the mechanical wear that button for a long time just can appear in the time has reduced its useful life.

Summary of the invention

The technical problem that the present invention solves provides a kind ofly to be avoided occurring the keyboard mechanical wearing and tearing and can improve useful life, and the sensor circuit of forming by tongue tube open in usual cooperates a kind of sensor type gate light control switch of formation with outside permanent magnetic field excitation.

The present invention solves the technical scheme that its technical problem takes: a kind of sensor type gate light control switch, it is characterized in that: but comprise and be arranged at two transducers on the relative motion member respectively and trigger magnet, sensor circuit is arranged in transducer, comprise the tongue tube open in usual as sensing element, the bidirectional triode thyristor of execution lighting circuit break-make in the described sensor circuit, described tongue tube open in usual is connected between the T1 utmost point and gate pole of bidirectional triode thyristor.

In order to form control loop with tongue tube open in usual, in described sensor circuit, also comprise capacitance resistance, be connected between the T2 utmost point and gate pole of bidirectional triode thyristor after the described capacitance resistance series connection.

When opening chamber door in order to be implemented in, trigger sensor circuit, described member is casing and chamber door, and transducer is fixed on the uncovered periphery of casing, and the triggering magnet that is used to control tongue tube folding open in usual is installed in the inboard corresponding position of chamber door.

After adopting said structure, its advantage is: the present invention adopts the principle of magnetic field excitation dry-reed tube switch, has realized the function of non-contact switch control, has overcome the mechanical loss that the traditional mechanical squash type brings; Use tongue tube as switch element, prolonged the useful life of switch greatly, and the tongue tube volume is small and exquisite, sensor circuit is simplified, and the profile of whole sensor can be made to measure according to client's needs.

Description of drawings

Fig. 1 is sensor circuit of the present invention and functional schematic;

Fig. 2 is the circuit diagram of the present invention in concrete enforcement;

Fig. 3, Fig. 4 are the mobile schematic diagrames that triggers magnet on the rotary chamber door;

Fig. 5, Fig. 6 trigger magnet to vertically move schematic diagram along tongue tube center line open in usual;

Fig. 7, Fig. 8 trigger the schematic diagram that magnet laterally moves along tongue tube center line open in usual.

Among the figure: 1, casing 2, transducer 2-1, sensor circuit 3, bidirectional triode thyristor 4, tongue tube open in usual 5, triggering magnet 6, chamber door

Embodiment

A kind of sensor type gate light control switch shown in Figure 1, but comprise and be arranged at two transducer 2 and triggering magnet 5 on the relative motion member respectively, sensor circuit 2-1 is arranged in transducer 2, comprise among the described sensor circuit 2-1 that described tongue tube 4 open in usual is connected between the T1 utmost point and gate pole of bidirectional triode thyristor 3 as the tongue tube open in usual 4 of sensing element and the bidirectional triode thyristor 3 of carrying out the lighting circuit break-make.Add tongue tube open in usual 4 as senser in transducer 2, tongue tube 4 open in usual can be realized billions of operations under the low voltage logic loading condition.

Sensor type gate light control switch shown in Figure 2 is applied to refrigerator, household freezer, refrigerating box, refrigerator-freezer, in the lighting circuit of household electrical appliance such as disinfection cabinet, transducer 2 is fixed on the uncovered periphery of casing 1, the triggering magnet 5 that is used to control tongue tube 4 open in usual is installed in correspondence position chamber door 6 inboards, tongue tube 4 open in usual and capacitance resistance are formed control loop, when triggering the induction zone of magnet 5 close transducers 2, be connected on the T1 utmost point of bidirectional triode thyristor 3 and tongue tube open in usual 4 closures between the gate pole, bidirectional triode thyristor 3 disconnects because of the gate pole Triggerless, cause lighting circuit to disconnect, bulb extinguishes; When triggering magnet 5 away from the induction zone of transducer 2, tongue tube 4 open in usual disconnects, and bidirectional triode thyristor 3 receives the triggering signal conducting because of gate pole, and the lighting circuit conducting brightens after the bulb energising.

Trigger the mobile schematic diagram of magnet 5 on Fig. 3, the rotary chamber door shown in Figure 4, the triggering magnet 5 that is installed on the chamber door 6 rotates along the axle on the casing 1, leave the lateral cross section or the longitudinal cross-section of tongue tube 4 open in usual when triggering magnet 5, behind the induction zone away from transducer 2, tongue tube 4 open in usual disconnects, sensor circuit 2-1 exports Continuity signal, gate light conducting; When chamber door 6 is closed, trigger the induction zone that magnet 5 enters transducer 2, tongue tube 4 closures open in usual, sensor circuit 2-1 exports break signal, and gate light extinguishes.

Trigger the mobile schematic diagram of magnet 5 on Fig. 5, the plug-type chamber door shown in Figure 6, chamber door 6 moves along the groove on the casing 1, triggering magnet 5 vertically moves along the center line of tongue tube 4 open in usual, behind the induction zone away from transducer 2, tongue tube 4 open in usual disconnects, sensor circuit 2-1 exports Continuity signal, gate light conducting; When chamber door 6 was closed, it was vertically close along the center line of tongue tube 4 open in usual to trigger magnet 5, entered the induction zone of transducer 2, tongue tube 4 closures open in usual, and sensor circuit 2-1 exports break signal, and gate light extinguishes.

Trigger the mobile schematic diagram of magnet 5 on Fig. 7, the plug-type chamber door shown in Figure 8, chamber door 6 moves along the groove on the casing 1, it is laterally mobile along the center line of tongue tube 4 open in usual to trigger magnet 5, behind the induction zone away from transducer 2, tongue tube 4 open in usual disconnects, sensor circuit 2-1 exports Continuity signal, gate light conducting; When chamber door 6 was closed, it was laterally close along the center line of tongue tube 4 open in usual to trigger magnet 5, entered the induction zone of transducer 2, tongue tube 4 closures open in usual, and sensor circuit 2-1 exports break signal, and gate light extinguishes.

Claims

1. sensor type gate light control switch, it is characterized in that: but comprise be arranged at respectively two on the relative motion member transducer (2) and trigger magnet (5), sensor circuit (2-1) is arranged in transducer (2), comprise the tongue tube open in usual (4) as sensing element, the bidirectional triode thyristor (3) of execution lighting circuit break-make in the described sensor circuit (2-1), described tongue tube open in usual (4) is connected between the T1 utmost point and gate pole of bidirectional triode thyristor (3).

2. a kind of sensor type gate light control switch according to claim 1 is characterized in that: also comprise capacitance resistance in described sensor circuit (2-1), be connected between the T2 utmost point and gate pole of bidirectional triode thyristor (3) after the described capacitance resistance series connection.

3. a kind of sensor type gate light control switch according to claim 1, it is characterized in that: described member is casing (1) and chamber door (6), described transducer (2) is fixed on the uncovered periphery of casing (1), and the triggering magnet (5) that is used to control tongue tube open in usual (4) folding is installed in the inboard corresponding position of chamber door (6).