CN211628984U - Heavy-current thermal protector - Google Patents
Heavy-current thermal protector Download PDFInfo
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- CN211628984U CN211628984U CN202020660848.8U CN202020660848U CN211628984U CN 211628984 U CN211628984 U CN 211628984U CN 202020660848 U CN202020660848 U CN 202020660848U CN 211628984 U CN211628984 U CN 211628984U
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- shell
- lead
- thermal protector
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Abstract
The utility model relates to a protector technical field especially relates to a heavy current thermal protector, include: a housing; one end of the first lead is fixed in the shell, and the other end of the first lead is led out of the shell; the static contact is fixedly connected to the inner side of the first lead; the supporting seat is fixed inside the shell; one end of the bimetallic strip is fixed on the supporting seat, and the other end of the bimetallic strip is contacted with the static contact; one end of the second lead is fixed in the shell and connected with the supporting seat, and the other end of the second lead is led out of the shell; the supporting seat is made of conductive metal, the moving contact is fixed at the contact part of the bimetallic strip and the static contact, and the observation window is arranged on the upper wall or the side wall of the shell, which is positioned on the moving contact, and is made of transparent material. The utility model discloses an observation window that sets up on the upper wall or the lateral wall that lie in movable contact position department on the casing through setting up the observation window into transparent material, is convenient for to the observation of its inner structure and action condition, has realized the staff of being convenient for and has distinguished the function whether hot protector moves.
Description
Technical Field
The utility model relates to a protector technical field especially relates to a heavy current thermal protector.
Background
Along with the domestic economic level, the industry level is constantly developing and various industries are increasingly prosperous, the use amount of large-current motors is increasing day by day, and the protector is a necessary safety device of the motor. The thermal protector is formed by combining two different alloys, generates heat after current flows, and because the two different alloys have different thermal expansion coefficients, the alloys tend to bend in one direction, and the contacts leave, so that the electricity is cut off.
In the prior art, the thermal protector is usually packaged by using a sleeve shell, so that the internal elements are effectively protected, and the service life of the product is prolonged. However, in the use process, when an overcurrent or overheat state occurs, the circuit can be automatically broken due to the existence of the protector, and when the electric appliance is cooled to the reset temperature, the contact is automatically closed, so that the normal working state is recovered. However, the worker may also make a misjudgment, that is, when the circuit is broken due to other faults, the worker may misunderstand that the thermal protector is operated, which may result in delay of working time and reduction of working efficiency.
In view of the above problems, the designer is actively making research and innovation based on the practical experience and professional knowledge that the product engineering is applied for many years, so as to create a large-current thermal protector, which is more practical.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the large-current thermal protector is convenient for workers to distinguish whether the large-current thermal protector acts or not.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a high current thermal protector comprising:
a housing;
one end of the first lead is fixed in the shell, and the other end of the first lead is led out of the shell;
the static contact is fixedly connected to the inner side of the first lead;
the supporting seat is fixed inside the shell;
one end of the bimetallic strip is fixed on the supporting seat, and the other end of the bimetallic strip is contacted with the static contact;
one end of the second lead is fixed in the shell and connected with the supporting seat, and the other end of the second lead is led out to the outer side of the shell;
the supporting seat is made of conductive metal, a moving contact is fixed at a position where the bimetallic strip is in contact with the fixed contact, an observation window is arranged on the upper wall or the side wall of the moving contact on the shell, and the observation window is made of transparent material.
Furthermore, the surface of the static contact and the movable contact is in a cambered surface structure, and the static contact and the movable contact are mutually attached when in contact.
Furthermore, the contact surface of the static contact and the movable contact is made of silver.
Further, the bimetallic strip is in an arc-shaped structure before the bimetallic strip does not act, and is bent towards the same direction as the bimetallic strip acts.
Furthermore, the supporting seat is further provided with a supporting rod, the supporting rod is made of insulating materials, and the supporting rod is arranged at the bottom of the bimetallic strip and used for supporting the bimetallic strip.
Further, still include pilot lamp, second stationary contact, pilot lamp power and third lead wire, wherein:
the indicator light is arranged in the shell and close to the observation window;
the second static contact is arranged inside the upper wall of the shell, and when the bimetallic strip acts, the bimetallic strip is in contact with the second static contact;
the indicator light power supply is used for supplying power to the indicator light;
and two ends of the third lead are respectively connected with the indicator light power supply and the supporting seat.
Further, the power supply of the indicator light is a rechargeable power supply.
Furthermore, a solar panel is fixed on the outer surface of the shell and is connected with the power supply of the indicator light.
The utility model has the advantages that: the utility model discloses an observation window that sets up on the upper wall or the lateral wall that lie in movable contact position department on the casing through setting up the observation window into transparent material, is convenient for to the observation of its inner structure and action condition, has realized the staff of being convenient for and has distinguished the function whether hot protector moves.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a heavy-current thermal protector (when not in operation) in an embodiment of the present invention;
fig. 2 is a schematic structural diagram (in operation) of a large current thermal protector according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a large current thermal protector with an indicator light according to an embodiment of the present invention;
fig. 4 is a partial enlarged view of a portion a in fig. 3 according to an embodiment of the present invention.
Reference numerals: 10-a housing; 11-a viewing window; 12-an indicator light; 13-a second stationary contact; 14-indicator lamp power supply; 15-a third lead; 16-a solar panel; 20-a first lead; 30-a stationary contact; 40-a support seat; 42-a support bar; 50-bimetallic strip; 51-a moving contact; 60-second lead.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
The large-current thermal protector as shown in fig. 1 to 4 includes:
a housing 10;
one end of the first lead 20 is fixed in the shell 10, and the other end is led out of the shell 10;
a stationary contact 30 fixed to the inner side of the first lead wire 20;
a support base 40 fixed inside the case 10;
a bimetal 50 having one end fixed to the support base 40 and the other end contacting the stationary contact 30;
a second lead 60, one end of which is fixed in the housing 10 and connected with the support base 40, and the other end of which is led out to the outside of the housing 10;
the supporting seat 40 is made of conductive metal, the moving contact 51 is fixed at the contact part of the bimetal strip 50 and the fixed contact 30, the observation window 11 is arranged on the upper wall or the side wall of the casing 10 which is positioned at the moving contact 51, and the observation window 11 is made of transparent material.
In the above embodiment, the observation window 11 is provided on the upper wall or the side wall of the housing 10 at the position of the movable contact 51, and the observation of the internal structure and the action of the thermal protector is facilitated by providing the observation window 11 with a transparent material, so that the function of facilitating the worker to distinguish whether the thermal protector is actuated is realized. It should be noted that the transparent material may be silica gel or acrylic material, which is convenient for injection molding. The support base 40 is a conductor, which is used to support and fix the bimetal strip 50, and is conductive, such as copper.
Further, the contact surfaces of the fixed contact 30 and the movable contact 51 are configured as arc-shaped structures, and the two contact surfaces are attached to each other when contacting. Through the arrangement of the cambered surface structure, the movable contact 51 is more fully contacted with the fixed contact 30, the contact area is enlarged, the connection performance is improved, and the condition of poor contact is prevented.
Specifically, the contact surface between the fixed contact 30 and the movable contact 51 is made of silver. The contact made of silver has good conductivity, is not easy to corrode, and prolongs the service life of the product.
In the embodiment of the present invention, as shown in fig. 1, the bimetal strip 50 has an arc-shaped structure before being unmoved, and is bent toward the same direction as the movement of the bimetal strip itself. Through the setting of arc structure, guide for its action on the one hand for the inboard sheetmetal expands towards the direction of outside arcwall face, and on the other hand when the temperature reachd reset temperature, the sheetmetal in the outside makes bimetallic strip 50 reset according to the opposite direction of the route of originally expanding, improves the reliability of its action.
In order to further prolong the service life of the bimetal strip 50, the supporting seat 40 is further provided with a supporting rod 42, the supporting rod 42 is made of an insulating material, and the supporting rod 42 is arranged at the bottom of the bimetal strip 50 and is used for supporting the bimetal strip 50. Through the arrangement of the support rod 42, the support is provided for the bimetallic strip 50, and the deformation of the bimetallic strip 50 caused by self gravity and the like is reduced.
The embodiment of the utility model provides an in order to improve the discernment degree of heavy current heat protector in the environment that does not have illumination, still be provided with prompt facility, still include pilot lamp 12, second stationary contact 13, pilot lamp power supply 14 and third lead wire 15, wherein:
the indicator light 12 is arranged in the housing 10 at a position close to the observation window 11; it should be noted here that the indicator light 12 can also be changed to a buzzer, and the alarm is given by sound.
The second stationary contact 13 is disposed inside the upper wall of the housing 10, and when the bimetal 50 is actuated, the bimetal 50 is in contact with the second stationary contact 13;
the indicator light power supply 14 is used for supplying power to the indicator light 12;
both ends of the third lead 15 are connected to the power supply 14 of the indicator lamp and the support base 40, respectively. Through intercommunication when passing pilot lamp 12, second stationary contact 13, pilot lamp power 14 and supporting seat 40 through bimetallic strip 50 action for pilot lamp 12 opens, thereby makes light see through observation window 11 and is observed by the staff, has improved the degree of discerning.
Further, in order to improve its applicability, the indicator lamp power supply 14 is a rechargeable power supply. A solar panel 16 is fixed to an outer surface of the housing 10, and the solar panel 16 is connected to the indicator light power supply 14. In the above embodiment, the rechargeable power supply and the solar panel 16 are arranged, so that the endurance of the indicator light power supply 14 is improved, and the convenience of use is improved.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A high current thermal protector, comprising:
a housing (10);
one end of the first lead (20) is fixed in the shell (10), and the other end of the first lead is led out of the shell (10);
a stationary contact (30) fixed to the inner side of the first lead (20);
a support base (40) fixed inside the housing (10);
one end of the bimetallic strip (50) is fixed on the supporting seat (40), and the other end of the bimetallic strip is contacted with the static contact (30);
one end of the second lead (60) is fixed in the shell (10) and is connected with the supporting seat (40), and the other end of the second lead is led out to the outer side of the shell (10);
the support seat (40) is made of conductive metal, a moving contact (51) is fixed at a contact part of the bimetallic strip (50) and the fixed contact (30), an observation window (11) is arranged on the upper wall or the side wall of the movable contact (51) on the shell (10), and the observation window (11) is made of transparent material.
2. A high current thermal protector according to claim 1, wherein the contact surfaces of the fixed contact (30) and the movable contact (51) are arranged in a cambered surface structure, and the contact surfaces are mutually attached when in contact.
3. A high current thermal protector according to claim 2, characterized in that the contact surface of the fixed contact (30) and the movable contact (51) is made of silver.
4. A high current thermal protector according to claim 1 wherein the bimetal (50) is of arcuate configuration prior to non-actuation and bends in the same direction as it does itself.
5. A high current thermal protector according to claim 1, wherein the support base (40) further has a support rod (42), the support rod (42) is made of an insulating material, and the support rod (42) is disposed at the bottom of the bimetal (50) for supporting the bimetal (50).
6. A high current thermal protector according to claim 1 further comprising an indicator light (12), a second stationary contact (13), an indicator light power supply (14) and a third lead (15), wherein:
the indicator light (12) is arranged in the shell (10) and close to the observation window (11);
the second stationary contact (13) is arranged inside the upper wall of the housing (10), and when the bimetal (50) acts, the bimetal (50) is in contact with the second stationary contact (13);
the indicator light power supply (14) is used for supplying power to the indicator light (12);
and two ends of the third lead (15) are respectively connected with the indicator lamp power supply (14) and the supporting seat (40).
7. A high current thermal protector according to claim 6 wherein the indicator light power supply (14) is a rechargeable power supply.
8. A high current thermal protector according to claim 7, wherein a solar panel (16) is further fixed on the outer surface of the shell (10), and the solar panel (16) is connected with the indicator light power supply (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020660848.8U CN211628984U (en) | 2020-04-26 | 2020-04-26 | Heavy-current thermal protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020660848.8U CN211628984U (en) | 2020-04-26 | 2020-04-26 | Heavy-current thermal protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211628984U true CN211628984U (en) | 2020-10-02 |
Family
ID=72622699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020660848.8U Active CN211628984U (en) | 2020-04-26 | 2020-04-26 | Heavy-current thermal protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211628984U (en) |
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2020
- 2020-04-26 CN CN202020660848.8U patent/CN211628984U/en active Active
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