High-efficiency high-quality snap-action temperature controller

Abstract

The invention relates to a high-efficiency high-quality snap-action temperature controller. The temperature controller is provided with a boot-shaped hollow rivet of an integrated structure, a rivet body is vertical to a rivet cap, a first protruded arc in the edge of one side of the rivet cap is connected with an arched groove of a casing in a matched way, a second recessed arc in the edge of theother side of the rivet cap is connected with a outer cylindrical surface of a central cylinder of the casing in the matched way, the bottom side of the rivet cap is tightly connected with a first plane of the casing, and the rivet body is in riveted joint with the inner end portion of a fourth binding post by penetrating a first circular through hole of the casing. The boot-shaped hollow rivet can be used to rivet the fourth binding post to the preset accurate position of the casing rapidly accurately, it is ensured that a static contact is in button joint with a moving contact completely torealize contact in the full surface, riveting crack is eliminated, and the qualified rate and assembling efficiency of products are improved.

Description

technical field [0001] The invention relates to the technical field of jump-type temperature controllers, in particular to a high-efficiency and high-quality jump-type temperature controller. Background technique [0002] The sudden jump thermostat is widely used in some electric heating appliances to control the temperature and play the role of overheating protection. There is an existing jump type thermostat, see figure 1 As shown, it includes cover 1, bimetal disc 2, action rod 3, housing 4, third terminal 5, fourth terminal 9, moving contact bracket 11, moving contact 12, fixed contact 13 , the bimetallic disc 2 is placed in the horizontal concave ring groove at the top of the housing 4, and the action rod 3 moves vertically through the central through hole of the central cylindrical boss 4-2 of the housing 4. One end of the contact bracket 11 is fixed with a movable contact 12, the fixed contact 13 is fixed on the inner end of the fourth terminal 9 and is opposite to ...

AI Technical Summary

Problems solved by technology

[0003] When riveting, the pressure block 14 is first placed on the first surface 4-1 of the housing 4, and its position cannot be fixed, which makes it difficult for the fifth hollow rivet 10 to pass through the middle through hole of the pressure block 14 smoothly. There is an offset, when it interferes with the first plane 4-1 of the housing 4, it is easy to cause riveting and reduce the product qualification rate; There is a large gap, and the shank of the fifth hollow rivet 10 and the through hole of the connected shell 4 also need a large tolerance. Therefore, there may be a gap between the fourth terminal 9 and the connected shell 4 after riveting. Fixed at a non-preset position, causing the fixed contact 13 and the movable contact 12 fixed at the inner end of the fourth terminal 9 to change from the entire surface contact to a small part of the surface contact, or even to a line contact, which greatly reduces the Overload capacity, the contact is easy to catch fire, greatly reducing its working life

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