CN2141931Y

CN2141931Y - Magnetic-thermal timing switch

Info

Publication number: CN2141931Y
Application number: CN 92239617
Authority: CN
Inventors: 姚世培; 胡林; 李兴民; 区雪华
Original assignee: TAILAI ELECTRONIC APPARATUS FACTORY JIANGMEN CITY
Current assignee: TAILAI ELECTRONIC APPARATUS FACTORY JIANGMEN CITY
Priority date: 1992-10-29
Filing date: 1992-10-29
Publication date: 1993-09-08
Anticipated expiration: 2002-10-29

Abstract

The utility model relates to a magnetic-thermal timing switch, comprising a casing body, a button, a spring, a permanent magnet, switch electrode leading pieces, a switch electrode, a soft magnet, a heat affording electrode, an electrothermal thread, temperature keeping materials, a thermo-sensitive resistance, etc. The utility model uses an automatic adjusting power apparatus to heat a soft magnet ferrite which is caused to get Curie temperature in a certain time; a ferromagnet is changed into a paramagnet, losing magnetoconductivity and releasing the permanent magnet, and the function of the timing switch is realized. The utility model has the advantages of reasonable design, small volume, low cost, safety, and convenient use. The magnetic-thermal timing switch is particularly suitable for bigger power electric appliance products of antisepsis cupboards, etc.

Description

Magnetic-thermal timing switch

The utility model relates to a kind of switch, the hot timing switch of particularly a kind of magnetic.Be suitable for the bigger electric equipment products of power consumption such as disinfection cupboard.

Existing electronics or mechanical timer construction of switch are complicated, and cost is higher; Timing switch in the existing commercially available disinfection cupboard will use start button, relay, three elements of temperature-sensitive protection tube to form, and cost is higher.

The purpose of this utility model be to avoid above-mentioned the deficiencies in the prior art part and provide a kind of utilize soft magnetic bodies within a certain period of time temperature rise reach Curie point and lose magnetic conductivity, discharge permanent magnet, thereby realize the hot timing switch of magnetic of timing switch function.

The purpose of this utility model can reach by following measure: the utility model comprises housing, button, spring, it is characterized in that: also have permanent magnet, switch electrode conducting sheet, switch electrode, soft magnetic bodies, heating wire, insulation material, thermistor, permanent magnet and switch electrode conducting sheet are housed on the button, and can move up and down by the effect of spring, switch electrode is loaded on the housing, and can contact with switch electrode conducting sheet, soft magnetic bodies and heating wire place on the insulation material, and the position of soft magnetic bodies is corresponding with permanent magnet.

The purpose of this utility model can also reach by following measure: join by heat supply electrode and power supply after thermistor is connected with heating wire, thermistor is loaded on the top in the housing.The gap that keeps 0.2～0.4mm when permanent magnet and soft magnetic bodies adhesive.

The utility model utilizes automatic power adjustment device heats soft magnetic ferrite, makes it reach Curie temperature in the regular hour, changes paramagnetic meterial into by ferromagnetic material, loses magnetic conductivity, discharges permanent magnet, thereby realizes the timing switch function.

Fig. 1 is an internal structure schematic diagram of the present utility model;

Fig. 2 is an outline drawing of the present utility model;

Fig. 3 is an electrical schematic diagram of the present utility model.

The utility model makes a detailed description below in conjunction with accompanying drawing (embodiment):

With reference to Fig. 1, Fig. 2, the utility model is made up of housing 1, button 2, spring 3, permanent magnet 4, switch electrode conducting sheet 5, switch electrode 6, soft magnetic bodies 7, heat supply electrode 8, heating wire 9, insulation material 10, thermistor 12 etc.11 is the fixed screw through hole in addition.Permanent magnet 4 and switch electrode conducting sheet 5 are housed on the button 2, and can move up and down by the effect of spring 3.Two switch electrodes 6 are loaded on the housing 1, and can contact with switch electrode conducting sheet 5, and soft magnetic bodies 7 and heating wire 9 place on the insulation material 10, and the position of soft magnetic bodies 7 is corresponding with permanent magnet 4, and its below is equipped with heating wire 9.

Operation principle: before switch does not start connection, permanent magnet 4 and switch electrode conducting sheet etc. are because the active force of spring 3 keeps upper end position in the drawings, at this moment permanent magnet 4 separates with soft magnetic bodies 7, and switch electrode 6 is in disconnected state (being the down circuitry that this switch is controlled).During startup, press the button 2, permanent magnet 4 is pushed to the surface of soft magnetic bodies 7, and suction at this moment is enough to overcome the pulling force of spring 3 and adhesive (Fig. 1 is in the attracted position), and the conducting sheet 5 that places the switch electrode 6 of the right and left to be fixed on the plastic stent is connected; Heating wire 9 obtains power supply simultaneously, produces 1～2 watt trace heat.The effect of insulation material 10 is to reduce distributing of heat, with the temperature that guarantees to reach required in the regular hour.When the temperature of soft magnetic bodies 7 when certain hour rises to Curie point, this material loses magnetic conductivity very soon, and is not attracted by permanent magnet 4, thus switch electrode conducting sheet 5 since the active force of spring pop up, power remove, the electric current of heat supply simultaneously also is cut off.In addition permanent magnet 4 and soft magnetic bodies 7 are not directly to contact when adhesive, but keep the gap of 0.2～0.4mm, are beneficial to the insulation of soft magnetic bodies 7.Its gap is to be determined by contacting of conducting sheet 5 and switch electrode 6.This switch after once regularly energising finishes, if start once more immediately, because of soft magnetic bodies 7 temperature still near Curie point, so start invalidly immediately, maybe can only connect blink, thereby play protective effect electrical appliance.

With reference to Fig. 3, the semistor 12 of on heating wire 9, having connected, when ambient temperature reduced, the heat radiation of device increased, and need provide more heat just can guarantee the stable of timing.At this moment the resistance Yin Wendu of thermistor descends and reduces, and has just in time played regulating action.Rationally select the resistance and the insulation situation of heating wire and thermistor for use, timing is met the demands.

The utility model has following advantage compared to existing technology: simple in structure, reasonable in design, volume is little, and cost is low, and is safe and reliable, easy to use, and the life-span is long, is specially adapted to the bigger electric equipment products of power consumption such as disinfection cupboard.

Claims

1, the hot timing switch of a kind of magnetic, comprise housing 1, button 2, spring 3, it is characterized in that: also have permanent magnet 4, switch electrode conducting sheet 5, switch electrode 6, soft magnetic bodies 7, heating wire 9, insulation material 10, thermistor 12, permanent magnet 4 and switch electrode conducting sheet 5 are housed on the button 2, and can move up and down by the effect of spring 3, switch electrode 6 is loaded on the housing 1, and can contact with switch electrode conducting sheet 5, soft magnetic bodies 7 and heating wire 9 place on the insulation material 10, and the position of soft magnetic bodies 7 is corresponding with permanent magnet 4.

2, switch according to claim 1 is characterized in that: join by heat supply electrode 8 and power supply after thermistor 12 is connected with heating wire 9, thermistor 12 is loaded on the top in the housing 1.

3, switch according to claim 1 is characterized in that: the gap that keeps 0.2～0.4mm when permanent magnet 4 and soft magnetic bodies 7 adhesives.