CN215869250U - Static contact and circuit breaker - Google Patents
Static contact and circuit breaker Download PDFInfo
- Publication number
- CN215869250U CN215869250U CN202121657437.4U CN202121657437U CN215869250U CN 215869250 U CN215869250 U CN 215869250U CN 202121657437 U CN202121657437 U CN 202121657437U CN 215869250 U CN215869250 U CN 215869250U
- Authority
- CN
- China
- Prior art keywords
- section
- connecting section
- supporting
- limiting
- sections
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
A static contact and a circuit breaker, the static contact comprises an installation part, a supporting part and a connecting part connected between the installation part and the supporting part, the support part is provided with a static contact, the connecting part comprises a first connecting part arranged below the support part, and a second connecting part connected with the mounting part, the first connecting part is connected between the support part and the second connecting part, the first connecting part comprises an upper connecting section and a lower connecting section which are different in height, and a current-limiting section respectively connected between the upper connecting section and the lower connecting section, wherein the upper connecting section, the lower connecting section and the current-limiting section form a bending structure in the vertical direction, which can improve the resistance of the static contact and enable the static contact to have a current-limiting function when in short-circuit fault, the breaker reduces short-circuit current through the static contact, can prevent the part damage in the breaker, effectively improves the reliability.
Description
Technical Field
The utility model relates to the field of low-voltage electric appliances, in particular to a static contact and a circuit breaker.
Background
The circuit breaker realizes the control of the on-off of the circuit through the on-off of the static contact and the moving contact and automatically cuts off the circuit when the circuit fails. However, the conventional low-ampere molded case circuit breaker has poor reliability of a short-circuit protection function, generates a large current when a short-circuit fault occurs to a circuit, causes a bimetal element and a heating resistor element inside the circuit breaker to generate permanent deformation, and causes a short-circuit breaking test failure or a safety accident if the circuit breaker fails.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a static contact with a current limiting function.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a static contact, includes installation department and supporting part to and connect the connecting portion between installation department and supporting part, be equipped with the stationary contact on the supporting part, connecting portion including set up the first connecting portion in the supporting part below, and with the second connecting portion that the installation department is connected, first connecting portion are connected between supporting part and the second connecting portion, first connecting portion include highly different last linkage segment and lower linkage segment to and connect the current-limiting section between last linkage segment and lower linkage segment respectively, go up the linkage segment and form the curved structure of vertical direction with lower linkage segment and current-limiting section.
Preferably, the connecting device comprises two first connecting parts which are arranged in parallel at intervals along the horizontal direction; the two ends of the two first connecting portions are connected through a front connecting section and a rear connecting section respectively, the front connecting section is connected with the supporting portion, and the rear connecting section is connected with the second connecting portion.
Preferably, the second connecting portion comprises a left connecting section and a right connecting section which are arranged in a horizontal staggered manner in the plane of the second connecting portion, and a second flow limiting section which is connected between the left connecting section and the right connecting section respectively, and the left connecting section, the right connecting section and the second flow limiting section form a second connecting portion bending structure.
Preferably, the support portion is correspondingly disposed above a gap between the two first connecting portions.
Preferably, the supporting part comprises a middle supporting section in a flat plate structure and an upper supporting section obliquely arranged on the middle supporting section, and a stationary contact matched with the moving contact is arranged on the upper supporting section.
Preferably, the upper connecting section and the lower connecting section are arranged in parallel, and the flow limiting section is respectively and vertically arranged with the upper connecting section and the lower connecting section.
Preferably, the first connecting portion comprises a plurality of upper connecting sections, a plurality of flow limiting sections and at least one lower connecting section, and the heights of the plurality of upper connecting sections are the same; and/or the first connecting part comprises a plurality of lower connecting sections, a plurality of current limiting sections and at least one upper connecting section, and the heights of the lower connecting sections are the same.
According to the static contact, the upper connecting section, the lower connecting section and the current limiting section form the first connecting part of the bending structure, so that the length of the first connecting part is effectively increased, the resistance of the static contact can be improved, the static contact has a current limiting effect, short-circuit current is reduced during short-circuit fault, the upper connecting section and the lower connecting section with different heights form the bending structure in the vertical direction, and the bending structure does not occupy extra space in the transverse direction, and the static contact has the characteristics of small size, simple structure and simple process.
The utility model also provides a circuit breaker, which comprises a circuit breaker shell, wherein the static contact is arranged in the circuit breaker shell.
Preferably, be equipped with the explosion chamber in the circuit breaker casing, the bottom of explosion chamber casing with the spacing cooperation in top side of last linkage segment.
The utility model also provides a circuit breaker, which comprises a circuit breaker shell, wherein the static contact is installed in the circuit breaker shell, a limiting boss for limiting the supporting part is arranged in the circuit breaker shell, the width of the limiting boss is smaller than the distance between the two first connecting parts, and the limiting boss is limited with the bottom side of the supporting part after penetrating through the two first connecting parts.
According to the breaker, the short-circuit current is reduced through the static contact, so that parts in the breaker can be prevented from being permanently deformed, burnt or broken, particularly, parts such as a bimetallic element, a heating resistor and the like in the breaker can be prevented from being damaged, and the reliability of the short-circuit protection function and the reliability of the breaking performance of the breaker are effectively improved.
Drawings
Fig. 1 is a schematic structural view of a static contact of the utility model;
fig. 2 is a side view of a stationary contact of the present invention;
fig. 3 is a top view of the stationary contact of the present invention;
figure 4 is a cross-sectional view of the circuit breaker of the present invention;
FIG. 5 is an enlarged view of a portion of FIG. 4 of the present invention;
fig. 6 is a schematic diagram of the matching of the base and the fixed contact of the circuit breaker of the present invention.
Detailed Description
The following describes a specific embodiment of the static contact according to the present invention with reference to the embodiments shown in fig. 1 to 6. The stationary contact of the present invention is not limited to the description of the following embodiments.
As shown in fig. 1-2, the static contact of the present invention includes a mounting portion 4, a supporting portion 3, and a connecting portion connected between the mounting portion 4 and the supporting portion 3, a static contact 30 matched with the moving contact is disposed on the supporting portion 3, the connecting portion includes a first connecting portion 1 disposed below the supporting portion 3, and a second connecting portion 2 connected with the mounting portion 4, the first connecting portion 1 is connected between the supporting portion 3 and the second connecting portion 2, the first connecting portion 1 includes an upper connecting section 11 and a lower connecting section 12 having different heights, and a current limiting section 10 respectively connected between the upper connecting section 11 and the lower connecting section 12, and the upper connecting section 11, the lower connecting section 12, and the current limiting section 10 form a bending structure in a vertical direction.
According to the static contact, the upper connecting section 11, the lower connecting section 12 and the current limiting section 10 form the first connecting part 1 of the bent structure, so that the length of the first connecting part 2 is effectively increased, the resistance of the static contact can be improved, the static contact has a current limiting effect, short-circuit current is reduced during short-circuit fault, the upper connecting section 11 and the lower connecting section 12 with different heights form the bent structure in the vertical direction, and the bent structure does not occupy additional space in the transverse direction, and has the characteristics of small size, simple structure and simple process.
As shown in fig. 4-6, the static contact of the present invention is applied to an embodiment of a low ampere molded case circuit breaker, and the embodiment of the present invention shows a base 5 of the circuit breaker, where the circuit breaker includes a three-pole contact circuit, the left end of each pole contact circuit is provided with the static contact, an installation portion 4 of each static contact is arranged outside, and is used for being connected with an external conductor in a matching manner with a wiring terminal, an arc extinguish chamber 6 is arranged above a support portion 3 of each static contact, the bottom of a housing of the arc extinguish chamber 6 is pressed on the top side of the upper connection section 11 for limiting, and the bottom of the lower connection section 12 is pressed on the base 5 of the circuit breaker for limiting. The first connecting part 1 can also play a role of limiting the arc extinguish chamber 6 on the basis of the current limiting function through the upper connecting section 11 and the lower connecting section 12 which are different in height.
According to the breaker, the short-circuit current is reduced through the static contact, so that parts in the breaker can be prevented from being permanently deformed, burnt or broken, particularly, parts such as a bimetallic element, a heating resistor and the like in the breaker can be prevented from being damaged, and the reliability of the short-circuit protection function and the reliability of the breaking performance of the breaker are effectively improved.
As shown in fig. 2, the first connection portion 1 includes two lower connection sections 12 and two upper connection sections 11 alternately arranged, the two lower connection sections 12 are respectively a first lower connection section 121 and a second lower connection section 122, the two upper connection sections 11 are respectively a first upper connection section 111 and a second upper connection section 112, the first upper connection section 111 is located inside the two lower connection sections 12, two ends of the first upper connection section 111 are respectively connected with the two lower connection sections 12 through two current limiting sections 10 to form a U-shaped first bending structure, the second upper connection section 112 is located outside the two lower connection sections 12, the second upper connection section 112 is connected with the second lower connection section 122 through another current limiting section 10 to form a Z-shaped second bending structure, the first lower connection section 121 is connected with the second connection portion 2, the reflection plate 61 of the housing of the arc extinguish chamber 6 of the present embodiment is pressed on the upper connection section 11 for limiting, the arc extinguish chamber 6 is generally limited by two side plates 62, 62, The reflecting plate 61 and the housing 63 form a casing, and a plurality of arc extinguishing grids 64 are arranged in the casing, and the embodiment does not limit the specific structure of the arc extinguishing chamber 6, and the reflecting plate 61 may not be arranged, and other parts of the casing of the arc extinguishing chamber 6 are pressed on the upper connecting section 11 for limiting, which all belong to the protection scope of the present invention.
In addition, the first connecting portion 1 of this embodiment is provided with two upper connecting sections 11 and two lower connecting sections 12 which are alternately arranged, and has two contact positions to respectively limit the housing of the arc extinguish chamber 6 and the circuit breaker base 5, or only one set of upper connecting section 11 and lower connecting section 12 may be provided, or more than two upper connecting sections 11 and lower connecting sections 12 may be provided. Namely, the connecting structure comprises a plurality of upper connecting sections 11, a plurality of flow limiting sections 10 and at least one lower connecting section 12, and the heights of the plurality of upper connecting sections 11 are the same; and/or, a plurality of lower connecting sections 12, a plurality of flow restricting sections 10 and at least one upper connecting section 11 are included, and the heights of the plurality of lower connecting sections 12 are the same, which belong to the protection scope of the present invention.
As shown in fig. 1 to 3, the present embodiment includes two first connection portions 1, the two first connection portions 1 are arranged in parallel at intervals along a horizontal direction, the two first connection portions 1 are respectively connected between the support portion 3 and the second connection portion 2, and because the heights of the upper connection section 11 and the lower connection section 12 are different, the horizontal occupied space of the first connection portions 1 is small, the two first connection portions 1 can be arranged in parallel, and the effect of current limiting is further improved. The two ends of the two first connecting parts 1 are connected through a front connecting section 14 and a rear connecting section 15 respectively, the front connecting section 14 is connected with the supporting part 3, and the rear connecting section 15 is connected with the second connecting part 2. Preferably, the support portion 3 is correspondingly disposed above the gap between the two first connecting portions 1.
Specifically, the second upper connecting sections 112 of the two first connecting portions 1 are connected through the front connecting section 14, the heights of the front connecting section 14 and the second upper connecting section 112 are the same, the middle part of the front connecting section 14 is connected with the supporting part 3, the first lower connecting sections 121 of the two first connecting portions 1 are connected through the rear connecting section 15, the heights of the rear connecting section 15 and the first lower connecting section 121 are the same, and the rear connecting section 15 is connected with the second connecting portion 2. It is understood that the front connection section 14 and the rear connection section 15 are connected between two ends of the two first connection portions 1, respectively, the front connection section 14 is used for connecting the support portion 3, and the rear connection section 15 is used for connecting the second connection portion 2. Of course, the front connecting section 14 and the rear connecting section 15 may not be provided, and the two first connecting portions 1 may be connected to the supporting portion 3 and the second connecting portion 2, respectively, all of which fall within the protection scope of the present invention.
As shown in fig. 4 to 6, a limiting boss 51 for limiting the supporting portion 3 is disposed on the circuit breaker base 5, a width of the limiting boss 51 is smaller than a distance between the two first connecting portions 1, and the limiting boss 51 is limited with a bottom side of the supporting portion 3 after passing through between the two first connecting portions 1. Through two first connecting portion 1 that set up side by side at the interval, not only make spacing boss 51 on the circuit breaker base 5 can directly pass between two first connecting portion 1, need not process alone the hole or spacing hole of dodging that correspond, have the characteristics of processing simply and the assembly of being convenient for.
As shown in fig. 1 to 3, the second connection portion 2 of this embodiment also has a current limiting function, the second connection portion 2 includes a left connection section 21 and a right connection section 22 that are arranged in a staggered manner, and a second current limiting section 20 connected between the left connection section 21 and the right connection section 22, the left connection section 21, the right connection section 22, and the second current limiting section 20 form a second connection portion bending structure, and the second current limiting section 20 has the same function as the current limiting section 10 on the first connection portion 1, and can also improve the resistance of the static contact, thereby reducing the current during the short-circuit fault.
Specifically, second connecting portion 2 slope of this embodiment is connected between first connecting portion 1 and installation department 4, second connecting portion 2 is U font structure, and it includes two right linkage segments 22 and a left linkage segment 21, and left linkage segment 21 sets up the one side between two right linkage segments 22, and the both ends of left linkage segment 21 are connected with two right linkage segments 22 respectively through two second current-limiting sections 20, the right linkage segment 22 that is located the top with the one end of supporting part 3 is connected, the right linkage segment 22 that is located the below with the one end of back linkage segment 15 is connected. Of course, the number of the left connecting section 21 and the right connecting section 22 of the second connecting portion 2 can be adjusted to form other shapes, such as a zigzag or S-shaped structure, and all fall within the protection scope of the present invention. It can be understood that, since the left connecting section 21 and the right connecting section 22 are laterally displaced in the plane of the second connecting portion 2, the occupied space in the lateral direction is large, and it is difficult to arrange two second connecting portions 2 side by side like two first connecting portions 1.
As shown in fig. 1-2, the supporting portion 3 includes a middle supporting section 32 in a flat plate structure, and an upper supporting section 31 and a lower supporting section 33 respectively disposed at two ends of the middle supporting section 32 in an inclined manner, a stationary contact 30 matched with the movable contact is disposed on the upper supporting section 31, the lower supporting section 33 is connected between the middle supporting section 32 and the front connecting section 14, the supporting portion 3 is located above the first connecting portion 1, and the directions of currents flowing through the supporting portion 3 and the first connecting portion 1 are opposite. The middle supporting section 32 is opposite to the current direction of the moving contact when being conducted, when the current at the initial stage of short circuit is smaller, the middle supporting section 32 of the flat plate structure can generate larger electric repulsion force, so that the moving contact can be quickly separated from the static contact, the peak value of the current passing through the short circuit is reduced, the electric arc is pulled to be longer, meanwhile, the upper supporting section 31 which is obliquely arranged forms an arc striking angle, the electric arc pulled out by the moving contact is quickly led into the arc extinguish chamber 6, and the electric arc extinguishment is accelerated.
The foregoing is a more detailed description of the utility model in connection with specific preferred embodiments and it is not intended that the utility model be limited to these specific details. For those skilled in the art to which the utility model pertains, several simple deductions or substitutions can be made without departing from the spirit of the utility model, and all shall be considered as belonging to the protection scope of the utility model.
Claims (10)
1. The utility model provides a static contact, includes installation department (4) and supporting part (3) to and connect the connecting portion between installation department (4) and supporting part (3), be equipped with stationary contact (30), its characterized in that on supporting part (3): connecting portion including set up first connecting portion (1) in supporting part (3) below, and with second connecting portion (2) that installation department (4) are connected, first connecting portion (1) are connected between supporting part (3) and second connecting portion (2), first connecting portion (1) are including last linkage segment (11) and lower linkage segment (12) of high difference to and connect respectively at last linkage segment (11) and current-limiting section (10) between lower linkage segment (12), go up linkage segment (11) and lower linkage segment (12) and current-limiting section (10) form the curved structure of vertical direction.
2. The stationary contact as set forth in claim 1, wherein: the connecting structure comprises two first connecting parts (1), wherein the two first connecting parts (1) are arranged in parallel at intervals along the horizontal direction; the two ends of the two first connecting portions (1) are connected through a front connecting section (14) and a rear connecting section (15) respectively, the front connecting section (14) is connected with the supporting portion (3), and the rear connecting section (15) is connected with the second connecting portion (2).
3. The stationary contact as set forth in claim 1, wherein: the second connecting portion (2) comprises a left connecting section (21) and a right connecting section (22) which are arranged in the plane of the second connecting portion (2) in a transverse staggered mode, and second current limiting sections (20) which are connected between the left connecting section (21) and the right connecting section (22) respectively, wherein the left connecting section (21), the right connecting section (22) and the second current limiting sections (20) form a second connecting portion bending structure.
4. The stationary contact as set forth in claim 2, wherein: the supporting part (3) is correspondingly arranged above the gap between the two first connecting parts (1).
5. The stationary contact as set forth in claim 1, wherein: the supporting part (3) comprises a middle supporting section (32) in a flat plate structure and an upper supporting section (31) obliquely arranged on the middle supporting section (32), and a static contact (30) matched with the moving contact is arranged on the upper supporting section (31).
6. The stationary contact as set forth in claim 1, wherein: the upper connecting section (11) and the lower connecting section (12) are arranged in parallel, and the flow limiting section (10) is respectively and vertically arranged with the upper connecting section (11) and the lower connecting section (12).
7. The stationary contact as set forth in claim 1, wherein: the first connecting part (1) comprises a plurality of upper connecting sections (11), a plurality of current limiting sections (10) and at least one lower connecting section (12), and the heights of the upper connecting sections (11) are the same; and/or the first connecting part (1) comprises a plurality of lower connecting sections (12), a plurality of current limiting sections (10) and at least one upper connecting section (11), and the heights of the lower connecting sections (12) are the same.
8. A circuit breaker comprising a circuit breaker housing (5), characterized in that: the static contact as set forth in any of claims 1-7 is mounted in the breaker housing (5).
9. The circuit breaker of claim 8, wherein: be equipped with explosion chamber (6) in circuit breaker casing (5), the bottom of explosion chamber (6) casing with the top side limit fit of last linkage segment (11).
10. A circuit breaker comprising a circuit breaker housing (5), characterized in that: the fixed contact of claim 2 or 4 is installed in the breaker housing (5), a limiting boss (51) used for limiting the supporting portion (3) is arranged in the breaker housing (5), the width of the limiting boss (51) is smaller than the distance between the two first connecting portions (1), and the limiting boss (51) penetrates between the two first connecting portions (1) and then is limited with the bottom side of the supporting portion (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121657437.4U CN215869250U (en) | 2021-07-19 | 2021-07-19 | Static contact and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121657437.4U CN215869250U (en) | 2021-07-19 | 2021-07-19 | Static contact and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215869250U true CN215869250U (en) | 2022-02-18 |
Family
ID=80331069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121657437.4U Active CN215869250U (en) | 2021-07-19 | 2021-07-19 | Static contact and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215869250U (en) |
-
2021
- 2021-07-19 CN CN202121657437.4U patent/CN215869250U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2492939B1 (en) | Circuit breaker with arc extinguishing mechanism | |
| CN215869250U (en) | Static contact and circuit breaker | |
| CN219180461U (en) | Miniature circuit breaker | |
| US3539961A (en) | Isolator | |
| CN211208376U (en) | Multifunctional circuit breaker | |
| CN112863965A (en) | Planar magnetic blowout arc extinguishing structure and circuit breaker | |
| CN213635879U (en) | Arc extinguish chamber of low-voltage circuit breaker | |
| CN107706063B (en) | Novel arc extinguishing grid piece and arc extinguishing chamber thereof | |
| CN219370911U (en) | High-power relay for high-reliability photovoltaic inverter | |
| CN112017925A (en) | Arc extinguishing mechanism and circuit breaker for circuit breaker | |
| KR200350108Y1 (en) | Extinguishing Apparatus for High Current Contact Breaker | |
| CN218274496U (en) | Small-sized circuit breaker | |
| CN219303588U (en) | Static contact | |
| CN211125548U (en) | Contact system of universal circuit breaker | |
| CN214175959U (en) | Planar magnetic blowout arc extinguishing structure and circuit breaker | |
| CN213242421U (en) | Plastic case circuit breaker | |
| CN107749361B (en) | Arc extinguishing bars piece, explosion chamber and circuit breaker | |
| CN220753350U (en) | Arc extinguishing structure of molded case circuit breaker | |
| CN220895439U (en) | Plastic case breaker static contact assembly | |
| CN213184178U (en) | Contact mechanism and switching device | |
| CN218004763U (en) | Arc extinguishing device of molded case circuit breaker | |
| CN219106054U (en) | Arc extinguishing mechanism and circuit breaker | |
| CN219163315U (en) | Fuse base capable of being installed in portable mode | |
| CN212517098U (en) | Arc isolating structure of static contact | |
| CN212342566U (en) | Arc control device and circuit breaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |