CN210110685U - Compact structure's miniature circuit breaker - Google Patents
Compact structure's miniature circuit breaker Download PDFInfo
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- CN210110685U CN210110685U CN201920682306.8U CN201920682306U CN210110685U CN 210110685 U CN210110685 U CN 210110685U CN 201920682306 U CN201920682306 U CN 201920682306U CN 210110685 U CN210110685 U CN 210110685U
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- Prior art keywords
- magnetic conduction
- conduction piece
- plate
- circuit breaker
- magnetic
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- 230000005291 magnetic effect Effects 0.000 claims abstract description 107
- 238000004880 explosion Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
A miniature circuit breaker with a compact structure. The miniature circuit breaker mainly solves the problems that 4 magnetic conduction plates are arranged in the existing miniature circuit breaker, so that the cost is increased on one hand, and the structure is relatively overstaffed on the other hand. The method is characterized in that: be equipped with first magnetic conduction piece (61), second magnetic conduction piece (62) and third magnetic conduction piece (63) in the casing, be equipped with recess (21) on the base plate, first magnetic conduction piece is located in recess (21), second magnetic conduction piece is located in the first cavity, third magnetic conduction piece is located in the second cavity, first magnetic conduction piece with form first magnetic field between the second magnetic conduction piece, first magnetic conduction piece with form the second magnetic field between the third magnetic conduction piece. The utility model provides a compact structure's miniature circuit breaker, form first magnetic field between its first magnetic conduction piece and the second magnetic conduction piece, form the second magnetic field between first magnetic conduction piece and the third magnetic conduction piece, saved a magnetic conduction piece, practice thrift cost and installation space.
Description
Technical Field
The utility model belongs to the circuit breaker field, in particular to compact structure's miniature circuit breaker.
Background
Each unit of the miniature circuit breaker comprises a shell and an operating handle, wherein an operating mechanism, a release, a contact system, an arc extinguishing system, an overcurrent protection system and a short-circuit protection system are arranged in the shell. The operating mechanism drives a moving contact in the contact system to move through the operating handle, so that the miniature circuit breaker is switched on and switched off, and the control on an electric circuit is realized; by sensing the current thermal effect and the magnetic effect, the protection is implemented when faults such as overload, short circuit and the like occur on an electric line.
When the moving contact and the static contact are contacted and have enough contact pressure, the miniature circuit breaker is connected with an electric loop, and the current of the loop system is judged by sensing the local temperature change of the miniature circuit breaker through the bimetallic element, so that the overcurrent protection function is realized. When the loop current is kept at the rated current value set by the miniature circuit breaker and below, the heat effect generated by the current causes the metal element to generate small deformation, and the release cannot be released; when the loop current exceeds the set rated current, the temperature of the metal element of the miniature circuit breaker rises, enough thermal deformation can be generated, the release is pushed to be tripped, at the moment, the movable contact and the fixed contact in the contact system are separated, the current loop is cut off, and the current protection function is realized.
The short-circuit protection system senses the change of loop current by an electromagnetic coil, when the loop current exceeds a normal value or is above a set short-circuit protection value, the electromagnetic force generated by the electromagnetic coil enables an iron core to push a push rod and acts on a release to trip the release and cut off a current loop, and the short-circuit protection function is realized.
The function of the arc extinguishing system is to realize the trend of continuously increasing the limiting current, namely the current limiting function, and finally extinguish the arc through the function of the arc when the miniature circuit breaker breaks the overlarge short-circuit current. When electric arc is introduced into the arc extinguish chamber, the metal grid sheet in the arc extinguish chamber is divided into a plurality of sections, and each section of electric arc generates a near-pole voltage near the metal grid sheet, so that the voltage drop of the whole electric arc is rapidly improved, and the electric arc is extinguished.
Traditional miniature circuit breaker generally includes the casing, the casing include upper cover, mesochite and bottom, the setting of mesochite is for more convenient installation operating device and contact system, the mesochite divide into the casing inner chamber extremely chamber of N and L, present miniature circuit breaker is equipped with the magnetic conduction board for increasing arc extinguishing effect mostly, be equipped with 4 magnetic conduction boards (two extremely blocks of N, two extremely blocks of L) in the ordinary miniature circuit breaker, so increased the cost on the one hand, on the other hand is structural also comparatively too fat.
SUMMERY OF THE UTILITY MODEL
In order to overcome the deficiency of the background art, the utility model provides a compact structure's miniature circuit breaker mainly solves and is equipped with 4 magnetic conduction boards in the present miniature circuit breaker, has increased the cost on the one hand like this, and on the other hand is structural also comparatively overstaffed problem.
The utility model adopts the technical proposal that:
the utility model provides a compact structure's miniature circuit breaker, includes the casing, the casing includes the base plate, the base plate with form first cavity between the casing one side inner wall, the base plate with form the second cavity between the casing opposite side inner wall, be equipped with first explosion chamber in the first cavity, be equipped with the second explosion chamber in the second cavity, be equipped with first magnetic conduction piece, second magnetic conduction piece and third magnetic conduction piece in the casing, be equipped with the recess on the base plate, first magnetic conduction piece is located in the recess, second magnetic conduction piece is located in the first cavity, third magnetic conduction piece is located in the second cavity, first magnetic conduction piece with form first magnetic field between the second magnetic conduction piece, first magnetic conduction piece with form the second magnetic field between the third magnetic conduction piece.
Still include with the base plate can dismantle the arc that separates of being connected and cover, separate the arc cover with form between the recess bottom inner wall and be used for the fixed slot that first magnetic conductive plate placed.
The inner wall of the groove is provided with a fixed seat and further comprises a fixing piece in threaded connection with the fixed seat, and the fixing piece is in abutting press fit with the top of the arc isolation cover.
The first magnetic conductive sheet is provided with a plurality of positioning holes, and the bottom of the arc isolating cover is provided with positioning pins in clearance fit with the positioning holes.
The arc separation cover comprises a top plate and a side plate, the bottom of the side plate is in contact with the inner wall of the bottom of the groove, and the positioning pin is arranged on the inner wall of the top plate.
The distance h1 between the first magnetic conductive plate and the second magnetic conductive plate is equal to the distance h2 between the first magnetic conductive plate and the third magnetic conductive plate.
The base plate comprises a first plate and a second plate, the top end face of the second plate is lower than that of the first plate, and the groove is formed in the second plate.
The base plate is provided with a front cover and a rear cover which are detachably connected, the first cavity is formed between the front cover and the base plate, and the second cavity is formed between the rear cover and the base plate.
The second magnetic conductive sheet is connected with the front cover, and the third magnetic conductive sheet is connected with the rear cover.
The utility model has the advantages that: the utility model provides a compact structure's miniature circuit breaker, form first magnetic field between its first magnetic conduction piece and the second magnetic conduction piece, form the second magnetic field between first magnetic conduction piece and the third magnetic conduction piece, saved a magnetic conduction piece, practice thrift cost and installation space.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is an exploded view of an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of an embodiment of the present invention.
Fig. 4 is an enlarged schematic view of a portion a of fig. 3.
Fig. 5 is a perspective view of an arc-isolating shield according to an embodiment of the present invention.
Fig. 6 is a perspective view of a substrate according to an embodiment of the present invention.
Fig. 7 is a schematic partial sectional view of an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings: as shown in the figure, a compact structure's miniature circuit breaker, including casing 1, the casing includes base plate 2, the base plate with form first cavity 3 between the inner wall of casing one side, the base plate with form second cavity 4 between the casing opposite side inner wall, be equipped with first explosion chamber 51 in the first cavity, be equipped with second explosion chamber 52 in the second cavity, be equipped with first magnetic conduction piece 61, second magnetic conduction piece 62 and third magnetic conduction piece 63 in the casing, be equipped with recess 21 on the base plate, first magnetic conduction piece is located in the recess 21, second magnetic conduction piece is located in the first cavity, third magnetic conduction piece is located in the second cavity, first magnetic conduction piece with form first magnetic field between the second magnetic conduction piece, first magnetic conduction piece with form second magnetic field between the third magnetic conduction piece.
This recess can be for sinking the groove, and first magnetic conduction piece sets up in the bottom that should sink the groove like this, also can be for leading to the groove, and first magnetic conduction piece and this recess circumference inner wall joint or bonding all can like this, make first magnetic conduction piece and second magnetic conduction piece, first magnetic conduction piece and third magnetic conduction piece all produce magnetic field, has saved a magnetic conduction piece, practices thrift cost and installation space.
In this embodiment, as shown in the figure, the magnetic shield further includes an arc shielding cover 7 detachably connected to the substrate, and a fixing groove for placing the first magnetic conductive sheet is formed between the arc shielding cover and the inner wall of the bottom of the groove. The first magnetic conduction sheet is arranged in the fixing groove, so that the electric arc is prevented from contacting with the first magnetic conduction sheet, and the first magnetic conduction sheet is protected.
In this embodiment, as shown in the figure, the inner wall of the groove is provided with a fixing seat 211, and further includes a fixing member in threaded connection with the fixing seat, and the fixing member is in abutting press fit with the top of the arc isolating cover. The arc separation cover is provided with a through hole 703 for the fixed seat to pass through, the fixed part can be a screw, a screw rod of the screw is connected with the fixed seat, and the diameter of the top of the screw is larger than that of the through hole and is pressed on the arc separation cover for compression.
In this embodiment, as shown in the figure, a plurality of positioning holes 611 are formed on the first magnetic conductive sheet, and a positioning pin 71 in clearance fit with the positioning holes is disposed at the bottom of the arc-isolating cover. After the arc isolating cover is installed, the positioning pin is inserted into the positioning hole to prevent the first magnetic conduction sheet from rotating.
In this embodiment, as shown in the figure, the arc-isolating cover includes a top plate 701 and a side plate 702, the bottom of the side plate contacts with the inner wall of the bottom of the groove, and the positioning pin is disposed on the inner wall of the top plate. The outer wall of the side plate is arranged corresponding to the circumferential inner wall of the groove.
In this embodiment, as shown in the figure, the distance h1 between the first magnetic conductive plate and the second magnetic conductive plate is equal to the distance h2 between the first magnetic conductive plate and the third magnetic conductive plate.
In this embodiment, as shown in the figure, the base plate includes a first plate 201 and a second plate 202, the top end surface of the second plate is lower than the top end surface of the first plate, and the groove is provided on the second plate.
In this embodiment, as shown in the figure, a front cover 101 and a back cover 102 are detachably connected to the substrate, the first cavity 3 is formed between the front cover and the substrate, and the second cavity is formed between the back cover and the substrate.
In this embodiment, as shown in the figure, the second magnetic conductive plate is connected to the front cover, and the third magnetic conductive plate is connected to the rear cover. The second magnetic conductive sheet is connected with the front cover, and the connection mode of the third magnetic conductive sheet and the rear cover can be the same as the arrangement structure of the first magnetic conductive sheet, namely, the mode of adopting the arc isolating cover and the mounting seat and adopting the fastener for mounting is adopted.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The embodiments described with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. The examples should not be construed as limiting the present invention, but any modifications made based on the spirit of the present invention should be within the scope of the present invention.
Claims (9)
1. The utility model provides a compact structure's miniature circuit breaker, includes casing (1), the casing includes base plate (2), the base plate with form first cavity (3) between the casing one side inner wall, the base plate with form second cavity (4) between the casing opposite side inner wall, be equipped with first explosion chamber (51) in the first cavity, be equipped with second explosion chamber (52), its characterized in that in the second cavity: be equipped with first magnetic conduction piece (61), second magnetic conduction piece (62) and third magnetic conduction piece (63) in the casing, be equipped with recess (21) on the base plate, first magnetic conduction piece is located in recess (21), second magnetic conduction piece is located in the first cavity, third magnetic conduction piece is located in the second cavity, first magnetic conduction piece with form first magnetic field between the second magnetic conduction piece, first magnetic conduction piece with form the second magnetic field between the third magnetic conduction piece.
2. A compact miniature circuit breaker according to claim 1 wherein: still include with the base plate can dismantle the arc cover (7) that separates of being connected, separate the arc cover with form between the recess bottom inner wall and be used for the fixed slot that first magnetic conductive plate placed.
3. A compact miniature circuit breaker according to claim 2 wherein: the recess inner wall is equipped with fixing base (211), still include with fixing base threaded connection's mounting, the mounting with the arc separation cover top is to the press fit.
4. A compact miniature circuit breaker according to claim 2 wherein: the first magnetic conductive sheet is provided with a plurality of positioning holes (611), and the bottom of the arc-isolating cover is provided with positioning pins (71) in clearance fit with the positioning holes.
5. A compact miniature circuit breaker according to claim 4 wherein: the arc-isolating cover comprises a top plate (701) and a side plate (702), the bottom of the side plate is in contact with the inner wall of the bottom of the groove, and the positioning pin is arranged on the inner wall of the top plate.
6. A compact miniature circuit breaker according to claim 1 wherein: the distance h1 between the first magnetic conductive plate and the second magnetic conductive plate is equal to the distance h2 between the first magnetic conductive plate and the third magnetic conductive plate.
7. A compact miniature circuit breaker according to claim 6 wherein: the base plate comprises a first plate (201) and a second plate (202), the top end face of the second plate is lower than that of the first plate, and the groove is formed in the second plate.
8. A compact miniature circuit breaker according to claim 1 wherein: the base plate is provided with a front cover (101) and a rear cover (102) which are detachably connected, the first cavity (3) is formed between the front cover and the base plate, and the second cavity is formed between the rear cover and the base plate.
9. A compact miniature circuit breaker according to claim 8 wherein: the second magnetic conductive sheet is connected with the front cover, and the third magnetic conductive sheet is connected with the rear cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920682306.8U CN210110685U (en) | 2019-05-14 | 2019-05-14 | Compact structure's miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920682306.8U CN210110685U (en) | 2019-05-14 | 2019-05-14 | Compact structure's miniature circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210110685U true CN210110685U (en) | 2020-02-21 |
Family
ID=69539336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920682306.8U Active CN210110685U (en) | 2019-05-14 | 2019-05-14 | Compact structure's miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210110685U (en) |
-
2019
- 2019-05-14 CN CN201920682306.8U patent/CN210110685U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 325600 No. 18, Sha Hung Road, North Bai Xiang Town, Yueqing, Wenzhou, Zhejiang. Patentee after: Zhejiang Chuangqi Electric Co.,Ltd. Address before: 325600 No. 18, Sha Hung Road, North Bai Xiang Town, Yueqing, Wenzhou, Zhejiang. Patentee before: ZHEJIANG CHUANGQI ELECTRIC Co.,Ltd. |