CN208970429U - A kind of double rivet type thermal protectors - Google Patents
A kind of double rivet type thermal protectors Download PDFInfo
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- CN208970429U CN208970429U CN201822044788.2U CN201822044788U CN208970429U CN 208970429 U CN208970429 U CN 208970429U CN 201822044788 U CN201822044788 U CN 201822044788U CN 208970429 U CN208970429 U CN 208970429U
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- shell
- bottom plate
- bimetal leaf
- movable contact
- stationary contact
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Abstract
The utility model relates to double rivet type thermal protectors; the bimetal leaf, stationary contact, the bottom plate for being set to housing bottom of movable contact are provided with including shell, one end; insulation paper washer is provided between bottom plate and shell; the first terminals being electrically connected with bimetal leaf and the second terminals being electrically connected with stationary contact are provided on shell; it is riveted on shell at one end at least two of the not set movable contact of bimetal leaf; stationary contact is riveted on bottom plate in a manner of no rivet, is contacted with movable contact；It is further fixed on substrate on bottom plate, negative tempperature coefficient thermistor and metal spiral pipe are installed on substrate, solenoid connects to form auxiliary circuit with negative tempperature coefficient thermistor, and auxiliary circuit is in parallel with stationary contact；It is being fixed with magnet close to movable contact position on bimetal leaf, magnetic pole is opposite with magnet poles in the energized state for metal spiral pipe.The thermal protector, it is not easy to generate high temperature in link position and influence properties of product；Furthermore the sensitivity of thermal protector is also improved.
Description
Technical field
The utility model relates to thermal protector technical field more particularly to a kind of double rivet type thermal protectors.
Background technique
Thermal protector is common electric elements, and the quality of performance directly influences whether the safety of circuit.
Existing common thermal protector includes that shell, one end are provided with the bimetal leaf of movable contact, stationary contact, are set to
The bottom plate of housing bottom is provided with insulation paper washer, one end welding of the not set movable contact of bimetal leaf between bottom plate and shell
In on shell, stationary contact is welded on bottom plate, is contacted with movable contact, and first be electrically connected with bimetal leaf is provided on shell and is connect
Line end and the second terminals being electrically connected with stationary contact.
The thermal protector of this structure, has the disadvantage in that
1, the connection type and stationary contact of bimetal leaf and shell and the connection type of bottom plate are welding manner, are being welded
During often have welding slag remnants so that the position of stationary contact and bottom plate and bimetal leaf and case weld is conductive
Contact area connects reduction, generates high temperature in welding position, influences the performance of product；
2, movable contact only leans on the characteristic of bimetal leaf itself to play thermal cutoff protection, and sensitivity is relatively low.
Utility model content
The purpose of this utility model is to provide a kind of double rivet type thermal protectors, at least to solve an above-mentioned technology
Problem.
The technical solution of the application are as follows: a kind of double rivet type thermal protectors are provided with the double of movable contact including shell, one end
Sheet metal, stationary contact, the bottom plate for being set to housing bottom are provided with insulation paper washer, are provided on shell between bottom plate and shell
The first terminals being electrically connected with bimetal leaf and the second terminals being electrically connected with stationary contact, the bimetal leaf are not set
It sets and is riveted on shell at one end at least two of movable contact, stationary contact is riveted on bottom plate in a manner of no rivet, and dynamic
Contact contact；It is further fixed on substrate on the bottom plate, negative tempperature coefficient thermistor and metal spiral are installed on the substrate
Pipe, the solenoid connect to form auxiliary circuit with the negative tempperature coefficient thermistor, the auxiliary circuit and the stationary contact
Point is in parallel；It is fixed with magnet in the position close to the movable contact on the bimetal leaf, the metal spiral pipe is in energization shape
Magnetic pole under state is opposite with the magnetic pole of the magnet.
Preferably, the auxiliary circuit further includes heating wire, the heating wire, the solenoid and the negative temperature coefficient
Thermistor series connection, and the heating wire is close to the negative tempperature coefficient thermistor.
Preferably, the metal spiral pipe is magnetic metal solenoid.
The connection type and stationary contact of thermal protector provided by the present application, bimetal leaf and shell and the connection side of bottom plate
Formula is riveting, and no welding slag is remaining, it is not easy to influence the performance of product in link position generation high temperature；
In addition, by setting magnet, negative tempperature coefficient thermistor and metal spiral pipe, in normal state, negative temperature
Coefficient resistance is larger, can be neglected, and electric current mainly passes through stationary contact and movable contact conduction, when circuit occurs abnormal being to lead
During pyrogenicity protector temperature is raised, negative tempperature coefficient thermistor reduces with the raising resistance of temperature, so that metal spiral shell
Spool has electric current to flow through and increasing, to generate magnetic field, pole orientation and magnet are on the contrary, make metal spiral pipe and magnetic
Iron generates repulsion, assists bi-metal plate deformed, improves the sensitivity of thermal protector.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of internal structure of double rivet type thermal protectors of the utility model；
Fig. 2 is a kind of top view of double rivet type thermal protectors of the utility model；
Fig. 3 is a kind of left view of double rivet type thermal protectors of the utility model；
Fig. 4 is a kind of circuit diagram of one embodiment of the utility model；
Fig. 5 is a kind of mounting structure schematic diagram of heating wire of the utility model；
Fig. 6 is a kind of circuit diagram of one embodiment of the utility model；
Marked in the figure: shell 1, rivet 2, bimetal leaf 3, movable contact 4, stationary contact 5, insulation paper washer 6, bottom plate 7, first connecing
Line end 8, the second terminals 9, magnet 10, metal spiral pipe 11, negative tempperature coefficient thermistor 12, substrate 13.
Specific embodiment
Understand for the ease of those of ordinary skill in the art and implement the utility model, with reference to the accompanying drawing and is embodied
Mode is described in further detail the utility model.
Embodiment 1, the utility model provide a kind of double rivet type thermal protectors, as Figure 1-Figure 4, including shell 1,
One end is provided with the bimetal leaf 3, stationary contact 5, the bottom plate 7 for being set to housing bottom of movable contact 4, is arranged between bottom plate and shell
There is insulation paper washer 6, is provided with the first terminals 8 being electrically connected with bimetal leaf and be electrically connected with stationary contact second on shell
Terminals 9 are riveted on shell at one end at least two of the not set movable contact of the bimetal leaf, generally use 2 riveting of rivet
It connects, stationary contact is riveted on bottom plate in a manner of no rivet, is contacted with movable contact；Substrate is further fixed on the bottom plate
13, negative tempperature coefficient thermistor 12 and metal spiral pipe 11, the solenoid and the negative temperature are installed on the substrate
Coefficient resistance connects to form auxiliary circuit, and the auxiliary circuit is in parallel with the stationary contact；It is being leaned on the bimetal leaf
The position of the nearly movable contact is fixed with magnet 10, the magnetic of the metal spiral pipe magnetic pole in the energized state and the magnet
It is extremely opposite.
The connection type and stationary contact of thermal protector provided by the present application, bimetal leaf and shell and the connection side of bottom plate
Formula is riveting, and no welding slag is remaining, it is not easy to influence the performance of product in link position generation high temperature；
In addition, by setting magnet, negative tempperature coefficient thermistor and metal spiral pipe, in normal state, negative temperature
Coefficient resistance is larger, can be neglected, and electric current mainly passes through stationary contact and movable contact conduction, when circuit occurs abnormal being to lead
During pyrogenicity protector temperature is raised, negative tempperature coefficient thermistor reduces with the raising resistance of temperature, so that metal spiral shell
Spool has electric current to flow through and increasing, to generate magnetic field, pole orientation and magnet are on the contrary, make metal spiral pipe and magnetic
Iron generates repulsion, assists bi-metal plate deformed, improves the sensitivity of thermal protector.
In the application, it is preferable to use magnetic metal solenoids for metal spiral pipe, that is, the solenoid made using material,
For example the solenoid of conducting wire formation is wound on the solenoid or magnetic core done using nickel alloy, in this way, in normal state,
Magnet and solenoid attract, so that movable contact and stationary contact point contact are stronger.
Embodiment 2, on the basis of embodiment 1, applicant have also done following design, referring to figs. 5 and 6, the auxiliary
Circuit further includes heating wire R, and the heating wire, the solenoid are connected with the negative tempperature coefficient thermistor, and the electricity
Heated filament is close to the negative tempperature coefficient thermistor.This structure, when circuit occurs abnormal being that thermal protector temperature is caused to increase
During, after auxiliary circuit is powered, electrothermal wire heating is further such that negative tempperature coefficient thermistor is rapidly heated, in subzero temperature
During degree coefficient resistance is rapidly heated, resistance declines rapidly, further promotion electrothermal wire heating, quickly forms good
Property circulation so that metal spiral pipe and magnet generation repulsion quickly become larger, further improve the sensitivity of thermal protector.
In the application, the shell of existing metal material production is can be used in shell, insulating boot can also be arranged outside shell, absolutely
The setting of edge cover be it is well known to those skilled in the art, be not specifically limited herein.
Above embodiments are only a kind of embodiment of the utility model, and the description thereof is more specific and detailed, but cannot be because
This and be interpreted as that a limitation on the scope of the patent of the present invention.Its specific structure and size can carry out accordingly according to actual needs
Adjustment.It should be pointed out that for those of ordinary skill in the art, in the premise for not departing from the utility model design
Under, various modifications and improvements can be made, and these are all within the protection scope of the present invention.
Claims (3)
1. a kind of double rivet type thermal protectors are provided with bimetal leaf (3), the stationary contact of movable contact (4) including shell (1), one end
Point (5), the bottom plate (7) for being set to housing bottom, are provided with insulation paper washer (6) between bottom plate and shell, be provided on shell with
First terminals of bimetal leaf electrical connection and the second terminals being electrically connected with stationary contact, which is characterized in that
It is riveted on shell at one end at least two of the not set movable contact of the bimetal leaf, stationary contact is with no rivet
Mode is riveted on bottom plate, is contacted with movable contact；
It is further fixed on the bottom plate substrate (13), negative tempperature coefficient thermistor (12) and metal spiral shell is installed on the substrate
Spool (11), the solenoid connect to form auxiliary circuit with the negative tempperature coefficient thermistor, the auxiliary circuit and institute
State stationary contact parallel connection；
It is fixed with magnet (10) on the bimetal leaf in the position close to the movable contact, the metal spiral pipe is in energization shape
Magnetic pole under state is opposite with the magnetic pole of the magnet.
2. double rivet type thermal protectors as described in claim 1, which is characterized in that the auxiliary circuit further includes heating wire
(R), the heating wire, the solenoid are connected with the negative tempperature coefficient thermistor, and the heating wire is close to described negative
Temperature coefficient thermistor.
3. double rivet type thermal protectors as claimed in claim 1 or 2, which is characterized in that the metal spiral pipe is magnetic gold
Belong to solenoid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822044788.2U CN208970429U (en) | 2018-12-06 | 2018-12-06 | A kind of double rivet type thermal protectors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822044788.2U CN208970429U (en) | 2018-12-06 | 2018-12-06 | A kind of double rivet type thermal protectors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208970429U true CN208970429U (en) | 2019-06-11 |
Family
ID=66766204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822044788.2U Active CN208970429U (en) | 2018-12-06 | 2018-12-06 | A kind of double rivet type thermal protectors |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208970429U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110536493A (en) * | 2019-09-18 | 2019-12-03 | 扬州宝珠电器有限公司 | A kind of riveted type fever tablet |
| CN110752578A (en) * | 2019-10-29 | 2020-02-04 | 温州非迩网络科技有限公司 | Circuit protection device for paper shredder |
-
2018
- 2018-12-06 CN CN201822044788.2U patent/CN208970429U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110536493A (en) * | 2019-09-18 | 2019-12-03 | 扬州宝珠电器有限公司 | A kind of riveted type fever tablet |
| CN110752578A (en) * | 2019-10-29 | 2020-02-04 | 温州非迩网络科技有限公司 | Circuit protection device for paper shredder |
| CN110752578B (en) * | 2019-10-29 | 2021-11-30 | 台州市康新电容器有限公司 | Circuit protection device for paper shredder |
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