CN201130636Y

CN201130636Y - Heat protector

Info

Publication number: CN201130636Y
Application number: CNU2007200420253U
Authority: CN
Inventors: 常光友
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-12-04
Filing date: 2007-12-04
Publication date: 2008-10-08
Anticipated expiration: 2017-12-04

Abstract

The utility model relates to a thermal protector of an electric appliance, belonging to the technical field of electric appliance protection units. The thermal protector comprises a casing, a bracket, a bi-metallic strip, a dynamic contact sheet, a moving contact, a static contact, a permanent seat, sealant, a wire and a bushing; wherein, the longitudinal section of the bracket is a resistant metal sheet, which both ends are linear and the middle part is folded into an upward triangle and a downward triangle; the front end of the bracket is a welding platform; when using the bracket as the supporting body, clamp the bi-metallic strip, which bends downwards and the middle section overlaps the triangle tip in the center section of the bracket, between the bracket and the dynamic contact sheet, on which a downward arc notch is arranged adjacent to the moving contact arranged under the dynamic contact sheet; weld the bi-metallic strip, the bracket and the dynamic contact sheet together; the permanent seat is riveted in the rear part of the bracket; and the tail end of the bracket is connected with the wire. Compared with prior thermal protector, the thermal protector has the advantages of reduced heat emission, increased load performance and stable controlled temperature.

Description

Thermal protector

Technical field

The present invention is a kind of thermal protector that is used for electrical equipment, belongs to Protector for electric appliances.

Technical background

Existing portion of hot protector bimetallic element position is fixing, can produce noise after the vibration, and welding portion is the plane welding, a little less than the weld strength; Secondly, directly by thermosensitive bimetal, the stability and the accuracy of rated temperature are not enough for existing portion of hot protector product, electric current, and load performance is lower, and by different electric currents, temperature can change to some extent in the loop.

Summary of the invention

Purpose of the present invention just is to overcome on the one hand the welding of above-mentioned plane, firmly low, the unfixed shortcoming in heat-sensitive duplex metal position of intensity; On the other hand heat-sensitive duplex metal is separated with the conduction movable contact spring, improve load performance, in the rated current scope, when electrical current changes, make the actual temperature of thermosensitive bimetal unaffected.

Main solution of the present utility model is such realization: thermal protector is made up of shell, support, bimetal leaf, movable contact spring, moving contact, static contact, holder, sealant, lead and sleeve pipe, and its project organization is: support is that a longitudinal cross-section is that two ends are that straight line, centre are converted into the sheet metal that upper and lower triangle has proper resistor; The front end of support is a jig, with the support is supporter, with one have camber down, the pars intermedia bimetal leaf that is overlapped on the mid-stent apex be installed in support and one one end below be provided with moving contact, having near the moving contact place in the middle of the movable contact spring of an arc-shaped notch down, weld its three fixing; The rear end riveted and fixed seat of support, the afterbody of support connects lead.Static contact is injection-moulded in the holder, and its silver faces up and contacts with moving contact, and afterbody connects lead.Shell is that one one end has opening, inner chamber is the hollow shell of cuboid, and said modules is set within it in the chamber, with the opening sealing of sealant with shell, puts sleeve pipe again.

Advantage of the present utility model is: compare with the thermal protector of prior art, heating reduces, and load performance improves, the control temperature stabilization.In the prior art, unfixing because of inner heat-sensitive duplex metal position, can produce the spring of noise and heat-sensitive duplex metal and easily be obstructed; Directly by electric current, its actual temperature just can change with the electrical current size variation bimetal leaf; And the accurate upset kick that the conduction of the movable contact spring in the utility model does not hinder heat-sensitive duplex metal, movable contact spring adopts the beryllium-bronze of high conductivity, good, the interior resistance of energising performance is little, and the periphery of bimetal leaf leaves enough safety clearances, has guaranteed freely bouncing of temperature-sensitive element.

Description of drawings

Fig. 1 is structure master's cross-sectional schematic of the present utility model

Embodiment

As shown in Figure 1, a kind of thermal protector is made up of support 1, bimetal leaf 2, movable contact spring 3, holder 4, lead 5, static contact 6, lead 7, shell 8, sealant 9 and sleeve pipe 10, and its project organization is: support 1 is that a longitudinal cross-section is that two ends are that straight line, centre are converted into the sheet metal that upper and lower triangle has proper resistor; The front end of support 1 is a jig, with support 1 is supporter, with one have camber down, the pars intermedia bimetal leaf 2 that is overlapped on support 1 middle part apex is installed in support 1 and one one end below is provided with moving contact 31, in the centre that the movable contact spring 3 of an arc-shaped notch is down arranged near the moving contact place, weld its three fixing; The rear end riveted and fixed seat 4 of support 1, the afterbody of support 1 connects lead 5.Static contact 6 is injection-moulded in the holder 4, and its silver faces up and contacts with moving contact 31, and afterbody connects lead 7.Shell 8 is that one one end has opening, inner chamber is the hollow shell of cuboid, is provided with the assembly of support 1, bimetal leaf 2, movable contact spring 3, holder 4, lead 5, static contact 6, lead 7 in its inner chamber, and opening part puts sleeve pipe 10 again with sealant 9 sealings.

During use, two leads 5,7 of thermal protector are connected in series in the primary circuit of the secondary circuit of various motor devices and household electrical appliance or little electric current, or thermal protector is located at the inside or the point for measuring temperature place of the device that need carry out heat protection, when the temperature around it is higher than the operating temperature value of thermal protector, the upset spring just takes place in bimetal leaf 2, static contact 6 is upspring, and the silver-colored emaciated face that is riveted on moving contact 31 and static contact 6 on the movable contact spring 3 is from contacting, thereby cuts off the electricity supply; After environment temperature was reduced to a certain numerical value, bimetal leaf 2 reverse flip returned to normal, and moving contact 3 resumes contacts again with the silver-colored face of static contact 6, from and energized.

Claims

1, a kind of thermal protector is made up of support (1), bimetal leaf (2), movable contact spring (3), holder (4), lead (5), static contact (6), lead (7), shell (8), sealant (9) and sleeve pipe (10), it is characterized in that: described support (1) is that a longitudinal cross-section is that two ends are that straight line, centre are converted into the sheet metal that upper and lower triangle has proper resistor.

2, by the described a kind of thermal protector of claim 1; it is characterized in that: the front end of described support (1) is a jig; with support (1) is supporter; with one have camber down, the pars intermedia bimetal leaf (2) that is overlapped on support (1) middle part apex be installed in support (1) be provided with moving contact (31) with one one end below, in the centre that the movable contact spring (3) of an arc-shaped notch is down arranged near the moving contact place, the three welds fixing.

3, by the described a kind of thermal protector of claim 1, it is characterized in that: the rear end riveted and fixed seat (4) of described support (1), the afterbody of support (1) connects lead (5).

4, by the described a kind of thermal protector of claim 1, it is characterized in that: described static contact (6) is injection-moulded in the holder (4), and its silver faces up and contacts with moving contact (31), and afterbody connects lead (7).

5, by the described a kind of thermal protector of claim 1, it is characterized in that: shell (8) is that one one end has opening, inner chamber is the hollow shell of cuboid; Be provided with the assembly of support (1), bimetal leaf (2), movable contact spring (3), holder (4), lead (5), static contact (6), lead (7) in its inner chamber, opening part seals with sealant (9).