Overheat protector for automobile window
Technical Field
The invention relates to a protector, in particular to an overheat protector.
Background
The thermal protector is a temperature controller formed by combining two different alloys, when the electric appliance works normally, the bimetallic strip is in a free state, the contact is in a closed/open state, when the temperature rises to an action temperature value, the bimetallic element is heated to generate internal stress to act rapidly, the contact is opened/closed, and a circuit is cut off/connected, so that the thermal protection effect is achieved. When the temperature is reduced to the set temperature, the contact is automatically closed/opened, and the normal working state is recovered. The prior art discloses a window motor overcurrent protector, and it includes epitheca and split type inferior valve, form the accommodation space that is used for placing components and parts between epitheca and the inferior valve, its weak point lies in, the inferior valve of this protector is split type structure, can form the passageway between the split type structure, in the use, often can have the dust to get into accommodation space from this passageway to influence the work of inside components and parts.
Disclosure of Invention
The invention aims to provide an overheat protector for an automobile window, which enhances the sealing property and improves the reliability.
The purpose of the invention is realized as follows: the utility model provides an overheat protector for car door window, includes epitheca and inferior valve, form the accommodation space that is used for placing components and parts between epitheca and the inferior valve, components and parts include interior by supreme insulation paper, heater subassembly and bimetallic strip that set gradually in accommodation space down, its characterized in that, the heater subassembly includes nested first binding post and the second binding post in insulating frame, links to each other through electric heating plate between the first binding post that is located insulating frame inside and the second binding post, and the first binding post that is located insulating frame outside links to each other with the inferior valve, is located to be provided with the stationary contact on the outside second binding post of insulating frame, the one end of bimetallic strip be fixed with can with the movable contact that the stationary contact contacted or broke off, the other end of bimetallic strip is fixed in the epitheca bottom.
Compared with the prior art, the invention has the beneficial effects that: the lower shell is designed into a fully-closed structure, so that the sealing property in the accommodating space is enhanced; the thickness of the electric heating sheet structure is thinner relative to that of the electric heating wire, so that the thickness of the whole product can be compressed; the stability of two binding post has been guaranteed through insulating frame and two binding post's nested formula cooperation, and set up the electric heating piece and make insulating frame can play certain guard action to it in insulating frame, stability when further strengthening the use. The invention can be used in automobile window motors.
As a further limitation of the present invention, both sides of the first connection terminal located inside the insulating frame extend in a direction of the second connection terminal to form two sides, end portions of the two sides protrude out of the insulating frame from the other side of the insulating frame, and the second connection terminal is disposed between the two sides. Due to the design of the two edges, the contact area of the first connecting terminal is larger and the first connecting terminal is more reliable when the first connecting terminal is combined with the insulating frame in a nested mode.
As a further limitation of the present invention, the first connection terminal and the second connection terminal located inside the insulating frame are both bent upward to form an upward convex structure, a root of one side of the first connection terminal located inside the insulating frame extends toward a center of the insulating frame to form a first connection portion, the second connection terminal located inside the insulating frame extends inward to form a second connection portion, the first connection portion and the second connection portion are diagonally distributed inside the insulating frame, two ends of the electric heating plate are respectively connected to the first connection portion and the second connection portion, and the electric heating plate is of a serpentine structure. The upward convex structure enables a gap to be formed between the two wiring terminals in the insulating frame and the lower shell, and further enables the space layout of the electric heating piece to be arranged upwards, so that the electric heating piece is closer to the bimetallic strip, and the triggering of the bimetallic strip is more sensitive; just can make electric heating plate thickness thinner, length is longer through the electric heating plate of winding design on the cooperation of the first wiring portion and the second wiring portion of diagonal line formula overall arrangement, guarantee that the performance of its work does not receive the influence in space, and still make electric heating plate can keep balance when the installation, finally make the electric heating plate of thin slice formula just can realize better trigger effect for electric heating wire in the past under the prerequisite that does not influence, circular electric heating wire processes into and levels the structure and is higher for the electric heating plate degree of difficulty of slice.
In a further aspect of the present invention, the insulating frame is formed with a support edge on an inner periphery thereof, and the meandering portion of the electric heating sheet extends outward to form a overlapping edge overlapping the support edge. The design makes the installation of the electric heating plate more stable and reliable.
As a further limitation of the present invention, the first wire connecting portion and the second wire connecting portion are each formed with a protrusion for connecting both ends of the electric heating sheet.
Drawings
FIG. 1 is a side sectional view of the present invention.
FIG. 2 is a cross-sectional view of a heater assembly according to the present invention.
FIG. 3 is a top view of the heater assembly of the present invention.
The heating wire assembly comprises an upper shell 1, a lower shell 2, a boss 2a, insulating paper 3, a through hole 3a, a heating wire assembly 4, an insulating frame 41, a supporting edge 41a, a first wiring terminal 42, two edges 42a and 42b, a first wiring part 42c, a protrusion 42d, a second wiring terminal 43, a second wiring part 43a, a protrusion 42b, an electric heating sheet 44, a lap edge 44a, a bimetallic strip 5, a static contact 6, a movable contact 7, an accommodating space 8 and a spherical protrusion 9.
Detailed Description
As shown in fig. 1-3, an overheat protector for an automobile window comprises an upper shell 1 and a lower shell 2, a containing space 8 for placing components is formed between the upper shell 1 and the lower shell 2, the components comprise insulating paper 3, a heating wire assembly 4 and a bimetallic strip 5 which are sequentially arranged in the containing space 8 from bottom to top, the heating wire assembly 4 comprises a first connecting terminal 42 and a second connecting terminal 43 which are nested in an insulating frame 41, the first connecting terminal 42 and the second connecting terminal 43 which are positioned in the insulating frame 41 are connected through an electric heating strip 44, the first connecting terminal 42 which is positioned outside the insulating frame 41 is connected with the lower shell 2, a stationary contact 6 is arranged on the second connecting terminal 43 which is positioned outside the insulating frame 41, a movable contact 7 which can be contacted with or disconnected with the stationary contact 6 is fixed at one end of the bimetallic strip 5, and the other end of the bimetallic strip 5 is fixed at the bottom of the upper shell 1 through a rivet, the middle bottom of the upper shell 1 is provided with a spherical bulge 9 matched with the bimetallic strip 5.
The two sides of the first connecting terminal 42 located inside the insulating frame 41 extend towards the second connecting terminal 43 to form two sides 42a, 42b, the ends of the two sides 42a, 42b extend out of the insulating frame 41 from the other side, the second connecting terminal 43 is arranged between the two sides 42a, 42b, the first connecting terminal 42 and the second connecting terminal 43 located inside the insulating frame 41 are both bent upwards to form a convex structure, the root of one side 41a of the first connecting terminal 42 located inside the insulating frame 41 extends towards the center of the insulating frame 41 to form a first connecting portion 42c, the second connecting terminal 43 located inside the insulating frame 41 extends inwards to form a second connecting portion 43a, the first connecting portion 42c and the second connecting portion 43a are distributed diagonally inside the insulating frame 41, two ends of the electric heating sheet 44 are respectively connected to the first connecting portion 42c and the second connecting portion 43a, the electric heating sheet 44 is a winding structure, a supporting edge 41a is processed on the inner circumference of the insulating frame 41, a winding part of the electric heating sheet 44 extends outwards to form a lapping edge 44a lapped on the supporting edge 41a, and bulges 42d and 43b used for connecting two ends of the electric heating sheet 44 are processed on the first wiring part 42c and the second wiring part 43 a; a plurality of bosses 2a contacting with the first connecting terminals 42 are formed upwards on the lower case 2, through holes 3a for the bosses 2a to pass through are formed in the insulating paper 3, four bosses 2a are arranged, two of the bosses and two edges 42a and 42b extend out of two ends of the insulating frame 41 to be connected, and the other two bosses are connected with the first connecting terminals 42 located outside the insulating frame 41.
When the electric heating device works, two terminals extend from the upper shell 1 and the lower shell 2 to serve as positive and negative electrodes, current forms a loop through the upper shell 1= > the bimetallic strip 5= > the movable contact 7= > the stationary contact 6= > the second wiring terminal 43= > the electric heating strip 44= > the first wiring terminal 42= > the lower shell 2 after the electricity is electrified, when the motor works and is in resistance, the electric heating strip 44 is heated, the bimetallic strip 5 bounces after the heating is heated, the movable contact 7 is separated from the stationary contact 6, the loop is disconnected, no current flows through the electric heating strip 44 any more, the temperature of the electric heating strip 44 is reduced, the bimetallic strip 5 rebounds after the temperature is reduced, the movable contact 7 is in charging contact with the stationary contact 6, and the loop is conducted again.
The present invention is not limited to the above-mentioned embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some substitutions and modifications to some technical features without creative efforts according to the disclosed technical contents, and these substitutions and modifications are all within the protection scope of the present invention.