CN111403235A - Pure temperature type thermal protector - Google Patents
Pure temperature type thermal protector Download PDFInfo
- Publication number
- CN111403235A CN111403235A CN202010284631.6A CN202010284631A CN111403235A CN 111403235 A CN111403235 A CN 111403235A CN 202010284631 A CN202010284631 A CN 202010284631A CN 111403235 A CN111403235 A CN 111403235A
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- bimetallic strip
- insulating layer
- shell
- fixed
- contact
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/04—Bases; Housings; Mountings
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/60—Means for producing snap action
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Thermally Actuated Switches (AREA)
Abstract
The invention provides a pure temperature type thermal protector which comprises a shell, a spring piece and a bottom plate, wherein one end of the spring piece is provided with a movable contact, the bottom plate is fixed at the bottom of the shell, and a first insulating layer is arranged between the shell and the bottom plate; the spring piece is fixed in the shell, and the bottom plate is provided with a fixed contact matched with the movable contact; a bimetallic strip is fixed between the bottom plate and the spring piece; and a second insulating layer is arranged in the shell and is used for preventing the bimetallic strip from communicating the circuits of the movable contact and the fixed contact when the movable contact and the fixed contact are disconnected. The ultrathin self-supporting thermal protector provided by the invention is smaller in overall thickness.
Description
Technical Field
The invention relates to the technical field of thermal protectors, in particular to a pure temperature type thermal protector.
Background
The thermal protector is the electrical apparatus component commonly used, the security of circuit can be directly influenced to the good or bad of its performance, in the current thermal protector design, the electric current all is through the bimetallic strip, utilizes the bimetallic strip temperature change to produce the purpose that the characteristic of deformation reaches high temperature open circuit, this kind of thermal protector, the circular telegram electric current is big more, the increase that corresponds the electric current needs the thickness of the spring leaf of thermal protector big more, consequently, the inner space of thermal protector casing also corresponds the increase. It can be seen that the existing thermal protectors suffer from at least the following disadvantages:
1. for a large-current thermal protector, the required spring piece is large in thickness and high in cost, and the large-thickness spring piece acts relatively slowly when being heated and deformed, so that the sensitivity is relatively low;
2. for a large-current thermal protector, the required spring piece is large in thickness, and the whole thickness of the thermal protector is large.
Disclosure of Invention
The present invention aims to provide a pure temperature type thermal protector to solve at least one of the above technical problems.
One technical scheme of the application is as follows: a pure temperature type thermal protector comprises a shell, a spring piece with a movable contact at one end and a bottom plate fixed at the bottom of the shell, wherein a first insulating layer is arranged between the shell and the bottom plate; the spring piece is fixed in the shell, and the bottom plate is provided with a fixed contact matched with the movable contact; a bimetallic strip is fixed between the bottom plate and the spring piece; and a second insulating layer is arranged in the shell and is used for preventing the bimetallic strip from communicating the circuits of the movable contact and the fixed contact when the movable contact and the fixed contact are disconnected.
Preferably, the second insulating layer is disposed between the bimetal and the spring plate.
Preferably, the first insulating layer is an insulating paper, and the second insulating layer is an insulating film.
Preferably, a positioning groove is formed in the bottom plate, the bimetallic strip and the second insulating layer are arranged in the positioning groove, a protruding portion is arranged on the spring piece corresponding to the bimetallic strip, and the protruding portion is located on one side, close to the bimetallic strip, of the spring piece; preferably, the bimetallic strip is arc-shaped, and the opening of the arc is towards the outer shell; a space is reserved between the edge of the bimetallic strip and the positioning groove; the protruding portion is in contact with the second insulating layer; the protruding part abuts against the bimetallic strip or has a distance with the bimetallic strip.
Preferably, a boss is arranged on the bottom plate, a positioning column is arranged on the boss, and the bimetallic strip is fixed on the positioning column; the spring plate is provided with a protruding part corresponding to the position of the bimetallic strip, and the protruding part is positioned on one side of the spring plate close to the bimetallic strip.
Preferably, the protruding portion is in contact with the second insulating layer; the protruding part abuts against the bimetallic strip or has a distance with the bimetallic strip.
Preferably, a welding boss is arranged at the top of the shell, and one end of the bimetallic strip, which is not provided with the moving contact, is welded with the welding boss.
The pure temperature type thermal protector is characterized in that the pure temperature type thermal protector is arranged in the casing, the bimetallic strip is arranged in the casing, and the bimetallic strip is arranged in the casing. It can be seen that the existing thermal protector has at least the following advantages:
1. for a large-current thermal protector, the required spring piece is small in thickness and low in cost, and the small spring piece can act relatively quickly when being heated and deformed, so that the sensitivity is relatively high;
2. for a large-current thermal protector, the required spring piece thickness is small, and the overall thickness of the thermal protector is small.
Another technical scheme of the application is as follows: a pure temperature type thermal protector comprises a shell, a spring piece with a movable contact at one end and a bottom plate fixed at the bottom of the shell, wherein a first insulating layer is arranged between the shell and the bottom plate; the spring piece is fixed in the shell, and a fixed contact matched with the movable contact is arranged on the shell; a bimetallic strip is fixed between the shell and the spring piece; and a second insulating layer is arranged in the shell and is used for preventing the bimetallic strip from communicating the circuits of the movable contact and the fixed contact when the movable contact and the fixed contact are disconnected.
Preferably, the second insulating layer is disposed between the bimetal and the spring plate.
Preferably, the first insulating layer is an insulating paper, and the second insulating layer is an insulating film.
Preferably, the shell is provided with a positioning groove, the bimetallic strip and the second insulating layer are arranged in the positioning groove, a protruding part is arranged on the spring piece corresponding to the bimetallic strip, and the protruding part is located on one side, close to the bimetallic strip, of the spring piece.
Preferably, the bimetallic strip is arc-shaped, and the opening of the arc is towards the bottom plate; a space is reserved between the edge of the bimetallic strip and the positioning groove; the protruding portion is in contact with the second insulating layer; the protruding part abuts against the bimetallic strip or has a distance with the bimetallic strip.
Preferably, a boss is arranged on the shell, a positioning column is arranged on the boss, and the bimetallic strip is fixed on the positioning column; the spring plate is provided with a protruding part corresponding to the position of the bimetallic strip, and the protruding part is positioned on one side of the spring plate close to the bimetallic strip.
Preferably, the protruding portion is in contact with the second insulating layer; the protruding part abuts against the bimetallic strip or has a distance with the bimetallic strip.
Preferably, a welding boss is arranged on the bottom plate, and one end of the bimetallic strip, which is not provided with the moving contact, is welded with the welding boss.
The pure temperature type thermal protector is characterized in that the pure temperature type thermal protector is arranged in the casing, the bimetallic strip is arranged in the casing, and the bimetallic strip is arranged in the casing. It can be seen that the existing thermal protector has at least the following advantages:
1. for a large-current thermal protector, the required spring piece is small in thickness and low in cost, and the small spring piece can act relatively quickly when being heated and deformed, so that the sensitivity is relatively high;
2. for a large-current thermal protector, the required spring piece thickness is small, and the overall thickness of the thermal protector is small.
3. The boss is arranged on the bottom plate, the bimetallic strip is arranged on the shell, the fixing of the bimetallic strip and the welding of the spring piece cannot affect each other during production, the welding process of the spring piece can be carried out outside the shell, and the bimetallic strip is assembled with the shell fixed with the thermistor after the welding is finished.
Drawings
FIG. 1 is a schematic view showing the internal structure of a pure temperature type thermal protector according to example 1;
FIG. 2 is a schematic view showing the internal structure of the pure temperature type thermal protector of embodiment 2;
FIG. 3 is a schematic view showing the internal structure of the pure temperature type thermal protector of embodiment 3;
FIG. 4 is a schematic view showing the internal structure of the pure temperature type thermal protector of embodiment 4;
reference numbers in the figures: the device comprises a movable contact 1, a spring piece 2, a convex part 2-1, an insulating film 3, a bimetallic strip 4, a shell 5, a welding boss 5-1, insulating paper 6, a bottom plate 7, a positioning groove 7-1, a positioning column 7-2, a boss 7-3 and a fixed contact 8.
Detailed Description
The invention is further illustrated by the following figures and examples.
In this embodiment, the bimetal is arc-shaped, and an opening of the arc is toward the housing; a space is reserved between the edge of the bimetallic strip and the positioning groove; the protruding portion is in contact with the second insulating layer; the bulge supports on the bimetallic strip or with the bimetallic strip has the interval, sets up the interval and does not receive the pressure limit of spring leaf in the twinkling of an eye when making the bimetallic strip be heated the inflation, and the system expands to have certain kinetic energy when contacting with the bulge for the thermal protector reaction is faster.
The pure temperature type thermal protector is characterized in that the pure temperature type thermal protector is arranged in the casing, the bimetallic strip is arranged in the casing, and the bimetallic strip is arranged in the casing. It can be seen that the existing thermal protector has at least the following advantages:
1. for a large-current thermal protector, the required spring piece is small in thickness and low in cost, and the small spring piece can act relatively quickly when being heated and deformed, so that the sensitivity is relatively high;
2. for a large-current thermal protector, the required spring piece thickness is small, and the overall thickness of the thermal protector is small.
In this embodiment, the protruding portion is in contact with the second insulating layer; the bulge supports on the bimetallic strip or with the bimetallic strip has the interval, sets up the interval and makes bimetallic strip be heated when the inflation in the twinkling of an eye not restricted by the pressure of spring leaf and expand to have certain kinetic energy when contacting with the bulge for the thermal protector reaction is faster.
Embodiment 3, embodiment 3 is the same as embodiment 1 in principle, except that the installation positions of the bimetal, the fixed contact and the spring plate are different, and the following is a specific structure of embodiment 3, referring to fig. 3, including a housing 5, a spring plate 2 with a movable contact 1 arranged at one end, and a bottom plate 7 fixed at the bottom of the housing, wherein a first insulating layer is arranged between the housing and the bottom plate, and in this embodiment, the first insulating layer is an insulating paper 6; the spring piece is fixed in the shell, as a fixing mode, a welding boss 5-1 is arranged on the bottom plate, one end of the bimetallic strip, which is not provided with the moving contact, is welded with the welding boss, and a fixed contact 8 matched with the moving contact is arranged on the shell; a bimetallic strip 4 is fixed between the shell and the spring piece; the second insulating layer is arranged in the shell and is an insulating film 3 in the embodiment, the second insulating layer is used for preventing the bimetallic strip from communicating with a circuit of the movable contact and the fixed contact when the movable contact and the fixed contact are disconnected, preferably, the second insulating layer is arranged between the bimetallic strip and the spring strip, the shell is provided with a positioning groove 7-1, the bimetallic strip and the second insulating layer are arranged in the positioning groove, a protruding part 2-1 is arranged on the spring strip corresponding to the position of the bimetallic strip, and the protruding part is arranged on one side, close to the bimetallic strip, of the spring strip. As a variation, the second insulating layer is disposed between the housing and the bimetal.
The pure temperature type thermal protector is characterized in that the pure temperature type thermal protector is arranged in the casing, the bimetallic strip is arranged in the casing, and the bimetallic strip is arranged in the casing. It can be seen that the existing thermal protector has at least the following advantages:
1. for a large-current thermal protector, the required spring piece is small in thickness and low in cost, and the small spring piece can act relatively quickly when being heated and deformed, so that the sensitivity is relatively high;
2. for a large-current thermal protector, the required spring piece thickness is small, and the overall thickness of the thermal protector is small.
3. The boss is arranged on the bottom plate, the bimetallic strip is arranged on the shell, the fixing of the bimetallic strip and the welding of the spring piece cannot affect each other during production, the welding process of the spring piece can be carried out outside the shell, and the bimetallic strip is assembled with the shell fixed with the thermistor after the welding is finished.
Embodiment 4, embodiment 4 is the same as embodiment 2 in principle, except that the installation positions of the bimetal, the fixed contact and the spring plate are different, and the following is a specific structure of embodiment 4, referring to fig. 4, including a housing 5, a spring plate 2 with a movable contact 1 arranged at one end, and a bottom plate 7 fixed at the bottom of the housing, wherein a first insulating layer is arranged between the housing and the bottom plate, and in this embodiment, the first insulating layer is an insulating paper 6; the spring piece is fixed in the shell, as a fixing mode, a welding boss 5-1 is arranged on the bottom plate, one end of the bimetallic strip, which is not provided with the moving contact, is welded with the welding boss, and a fixed contact 8 matched with the moving contact is arranged on the shell; a bimetallic strip 4 is fixed between the shell and the spring piece; a second insulating layer is arranged in the shell, the second insulating layer is an insulating film 3 in the embodiment and is used for preventing the bimetallic strip from communicating with a circuit of the movable contact and the static contact when the movable contact and the static contact are disconnected, preferably, the second insulating layer is arranged between the bimetallic strip and the spring strip, a boss 7-3 is arranged on the shell, a positioning column 7-2 is arranged on the boss, and the bimetallic strip is fixed on the positioning column; and a bulge (2-1) is arranged on the spring piece corresponding to the position of the bimetallic strip, and is positioned on one side of the spring piece close to the bimetallic strip. As a variation, the second insulating layer is disposed between the housing and the bimetal.
In this embodiment, the protruding portion is in contact with the second insulating layer; the bulge supports on the bimetallic strip or with the bimetallic strip has the interval, sets up the interval and makes bimetallic strip be heated when the inflation in the twinkling of an eye not restricted by the pressure of spring leaf and expand certain bulge contact when having certain kinetic energy for the thermal protector reaction is faster. This embodiment will be relative to embodiment 2, with the boss setting on the bottom plate, set up the bimetallic strip on the shell, when production, the fixed of bimetallic strip and the welding of spring leaf can not influence each other, and spring leaf welding process can be at the shell outside welding, welds the shell assembly that finishes with being fixed with thermistor again, is particularly useful for the automated production of heavy current thermal protector.
The above description is only for the purpose of illustrating preferred embodiments of the present invention and is not to be construed as limiting the present invention, and the terms first, second, etc. are used for distinguishing between similar terms and not for limiting the technical terms, and various modifications and variations of the present invention may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pure temperature type thermal protector is characterized by comprising a shell (5), a spring piece (2) with one end provided with a movable contact (1) and a bottom plate (7) fixed at the bottom of the shell, wherein a first insulating layer is arranged between the shell and the bottom plate;
the spring piece is fixed in the shell, and a fixed contact (8) matched with the movable contact is arranged on the bottom plate;
a bimetallic strip (4) is fixed between the bottom plate and the spring piece;
and a second insulating layer is arranged in the shell and is used for preventing the bimetallic strip from communicating the circuits of the movable contact and the fixed contact when the movable contact and the fixed contact are disconnected.
2. A protector according to claim 1, wherein the second insulating layer is disposed between the bimetal and the spring plate;
preferably, the first insulating layer is an insulating paper (6), and the second insulating layer is an insulating film (3).
3. A pure temperature type thermal protector according to claim 1, characterized in that the bottom plate is provided with a positioning groove (7-1), the bimetal and the second insulating layer are arranged in the positioning groove, a protrusion (2-1) is arranged on the spring plate corresponding to the bimetal, and the protrusion is arranged on one side of the spring plate close to the bimetal;
preferably, the bimetallic strip is arc-shaped, and the opening of the arc is towards the outer shell;
a space is reserved between the edge of the bimetallic strip and the positioning groove;
the protruding portion is in contact with the second insulating layer;
the protruding part abuts against the bimetallic strip or has a distance with the bimetallic strip.
4. A pure temperature type thermal protector according to claim 1, wherein a boss (7-3) is provided on the bottom plate, a positioning column (7-2) is provided on the boss, and the bimetallic strip is fixed on the positioning column;
a bulge (2-1) is arranged on the spring piece corresponding to the position of the bimetallic strip, and the bulge is positioned on one side of the spring piece close to the bimetallic strip;
preferably, the protruding portion is in contact with the second insulating layer;
the protruding part abuts against the bimetallic strip or has a distance with the bimetallic strip.
5. A pure temperature type thermal protector according to claim 3 or 4, characterized in that the top of the outer shell is provided with a welding boss (5-1), and the end of the bimetallic strip not provided with the moving contact is welded with the welding boss.
6. A pure temperature type thermal protector is characterized by comprising a shell (5), a spring piece (2) with one end provided with a movable contact (1) and a bottom plate (7) fixed at the bottom of the shell, wherein a first insulating layer is arranged between the shell and the bottom plate;
the spring piece is fixed in the shell, and a fixed contact (8) matched with the movable contact is arranged on the shell;
a bimetallic strip (4) is fixed between the shell and the spring piece;
and a second insulating layer is arranged in the shell and is used for preventing the bimetallic strip from communicating the circuits of the movable contact and the fixed contact when the movable contact and the fixed contact are disconnected.
7. A protector according to claim 6, wherein the second insulating layer is provided between the bimetal and the spring plate;
preferably, the first insulating layer is an insulating paper (6), and the second insulating layer is an insulating film (3).
8. A protector according to claim 6, characterized in that the casing is provided with a positioning slot (7-1), the bimetal and the second insulating layer are arranged in the positioning slot, and the spring plate is provided with a protrusion (2-1) corresponding to the bimetal, the protrusion being located on one side of the spring plate close to the bimetal.
Preferably, the bimetallic strip is arc-shaped, and the opening of the arc is towards the bottom plate;
a space is reserved between the edge of the bimetallic strip and the positioning groove;
the protruding portion is in contact with the second insulating layer;
the protruding part abuts against the bimetallic strip or has a distance with the bimetallic strip.
9. A pure temperature type thermal protector according to claim 6, characterized in that the housing is provided with a boss (7-3) on which a positioning post (7-2) is provided, the bimetal being fixed on the positioning post;
and a bulge (2-1) is arranged on the spring piece corresponding to the position of the bimetallic strip, and is positioned on one side of the spring piece close to the bimetallic strip.
Preferably, the protruding portion is in contact with the second insulating layer;
the protruding part abuts against the bimetallic strip or has a distance with the bimetallic strip.
10. A pure temperature type thermal protector according to claim 8 or 9, wherein a welding boss (5-1) is provided on the base plate, and an end of the bimetal not provided with the moving contact is welded with the welding boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010284631.6A CN111403235A (en) | 2020-04-13 | 2020-04-13 | Pure temperature type thermal protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010284631.6A CN111403235A (en) | 2020-04-13 | 2020-04-13 | Pure temperature type thermal protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111403235A true CN111403235A (en) | 2020-07-10 |
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ID=71431521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010284631.6A Pending CN111403235A (en) | 2020-04-13 | 2020-04-13 | Pure temperature type thermal protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111403235A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178355A (en) * | 2021-04-28 | 2021-07-27 | 江苏常荣电器股份有限公司 | Novel heat sensing protector |
-
2020
- 2020-04-13 CN CN202010284631.6A patent/CN111403235A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178355A (en) * | 2021-04-28 | 2021-07-27 | 江苏常荣电器股份有限公司 | Novel heat sensing protector |
| CN113178355B (en) * | 2021-04-28 | 2023-05-02 | 江苏常荣电器股份有限公司 | Thermal sensing protector |
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