CN221176118U - Small-sized circuit breaker - Google Patents
Small-sized circuit breaker Download PDFInfo
- Publication number
- CN221176118U CN221176118U CN202323130603.7U CN202323130603U CN221176118U CN 221176118 U CN221176118 U CN 221176118U CN 202323130603 U CN202323130603 U CN 202323130603U CN 221176118 U CN221176118 U CN 221176118U
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- Prior art keywords
- shaft
- circuit breaker
- miniature circuit
- support
- shaft hole
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- 230000008878 coupling Effects 0.000 claims description 25
- 238000010168 coupling process Methods 0.000 claims description 25
- 238000005859 coupling reaction Methods 0.000 claims description 25
- 238000001746 injection moulding Methods 0.000 claims description 2
- 125000003003 spiro group Chemical group 0.000 claims description 2
- 238000004880 explosion Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Breakers (AREA)
Abstract
The utility model discloses a miniature circuit breaker with high voltage withstand level and good strength and connection stability. The technical scheme adopted comprises the following steps: the tripping mechanism comprises a support, a lock catch and a jump buckle, wherein the support and the lock catch are connected with the upper end of the support through a main shaft in the shell in a shaft mode, the jump buckle is connected with the operating handle through a connecting rod, the lock catch is connected with the bimetallic strip through a pull rod, the lower end of the support is connected with a movable contact in a shaft mode, the jump buckle is integrally injection molded and provided with a first shaft connection portion and a second shaft connection portion, the first shaft connection portion is provided with a first shaft hole, the second shaft connection portion is provided with a second shaft hole, the end portion of the connecting rod is connected with the first shaft hole of the first shaft connection portion in a shaft mode, the support comprises an integrally formed upper support plate and a lower support plate, and the upper ends of the upper support plate and the lower support plate are provided with third shaft holes which are coaxially arranged.
Description
Technical Field
The utility model relates to a low-voltage electrical appliance, in particular to a miniature circuit breaker.
Background
The miniature circuit breaker (English name: miniatureCircuitBreaker) is also called miniature circuit breaker (MicroCircuitBreaker), is suitable for overload and short-circuit protection of the line from the rated voltage of 230/400V to the rated current of 63A at the alternating current of 50/60Hz, and can also be used as the infrequent operation conversion of the line under the normal condition. The structure of the miniature circuit breaker comprises: the tripping mechanism comprises a bracket and a lock catch which are connected in the shell in a shaft mode through a main shaft and a jump buckle which is connected with the upper end of the bracket in a shaft mode, the jump buckle is connected with the operating handle through a connecting rod, the lock catch is connected with the bimetallic strip through a pull rod, and the lower end of the bracket is connected with a moving contact in a shaft mode. The support, the lock catch and the jump buckle are all formed by stamping a metal plate, and the pressure resistance level of the product can be reduced due to the fact that the lock catch and the jump buckle are directly connected with the movable contact. The plastic piece is used for replacing the plastic piece, but the difficulty of ensuring the strength and the connection stability of the plastic piece is currently to be solved.
Disclosure of utility model
The utility model aims to solve the technical problem of providing a miniature circuit breaker with high withstand voltage level and good strength and connection stability.
In order to solve the problems, the technical scheme adopted by the utility model comprises the following steps: the tripping mechanism comprises a support, a lock catch and a jump buckle, wherein the support is axially connected in the shell through a main shaft, the jump buckle is axially connected to the upper end of the support, the jump buckle is connected with the operating handle through a connecting rod, the lock catch is connected with the bimetallic strip through a pull rod, and the lower end of the support is axially connected with a moving contact, so that the tripping mechanism is characterized in that the tripping mechanism comprises a shell, an operating handle, a tripping mechanism, an electromagnetic coil mechanism, a fixed contact, a bimetallic strip and an arc-extinguishing chamber, wherein the operating handle is axially connected to the upper end of the shell, the tripping mechanism is arranged in the shell, the lock catch is axially connected to the upper end of the support through a main shaft, and the tripping mechanism is characterized in that: the jump knot integrative injection moulding, and be equipped with first coupling portion and second coupling portion, be equipped with first shaft hole in the first coupling portion, be equipped with the second shaft hole in the second coupling portion, connecting rod tip coupling in the first shaft hole of first coupling portion, the support includes integrated into one piece's last mounting panel and lower mounting panel, the upper end of going up mounting panel and lower mounting panel is equipped with the third shaft hole of coaxial setting, the second coupling portion is established go up between mounting panel and the lower mounting panel just through the round pin hub connection between second shaft hole and the third shaft hole, be equipped with the latch hook in the first coupling portion, be equipped with on the hasp with latch hook complex mount.
The miniature circuit breaker, its characterized in that: and a guide part which can be embedded between the upper support plate and the lower support plate is arranged between the first shaft connection part and the second shaft connection part, and the guide part extends to the lock hook.
The miniature circuit breaker, its characterized in that: the lower end of the lock hook and the two sides corresponding to the guide part are provided with first positioning parts for positioning the ends of the upper support plate and the lower support plate.
The miniature circuit breaker, its characterized in that: the bimetallic strip lower extreme one side is equipped with adjusting screw subassembly, adjusting screw subassembly include inlay nut on the casing and with nut spiro union's screw rod, through rotatory the screw rod can be close to or keep away from bimetallic strip.
The miniature circuit breaker, its characterized in that: and an opening and closing indicator is axially connected in the shell, and the lower end of the pin shaft is connected with a kidney-shaped hole at the lower end of the opening and closing indicator.
The miniature circuit breaker, its characterized in that: the lock catch is provided with a torsion spring, an upper force arm of the torsion spring is connected with a first force arm positioning groove on the support, and a lower force arm of the torsion spring is connected with a second force arm positioning groove on the lock catch.
The miniature circuit breaker, its characterized in that: and a second positioning part for positioning the connecting rod is integrally formed at one side of the upper end of the first shaft connection part of the jump buckle.
The miniature circuit breaker, its characterized in that: the bimetallic strip is connected with an arc striking strip extending to the bottom of the arc extinguishing chamber (7).
The miniature circuit breaker, its characterized in that: the upper end of the movable contact is provided with a positioning groove matched with the main shaft and a tension spring connected with the shell.
The miniature circuit breaker has the advantages that: 1. the jump buckle adopts a plastic piece, so that the pressure resistance level of the product can be improved; 2. the jump knot is equipped with first coupling portion and second coupling portion, and the tip coupling of connecting rod is in the first shaft hole of first coupling portion, and the support includes integrated into one piece's last mounting panel and lower mounting panel, and the upper end of going up mounting panel and lower mounting panel is equipped with the coaxial third shaft hole that sets up, establishes second coupling portion between last mounting panel and lower mounting panel, and through the round pin hub connection between second shaft hole and the third shaft hole, through above-mentioned structure to ensure the intensity and the connection stability of jump knot.
Drawings
The utility model is further described below with reference to the drawings.
Fig. 1 is a schematic structural view of a miniature circuit breaker of the present utility model;
FIG. 2 is a schematic view of the structure of the trip mechanism of the present utility model;
FIG. 3 is an exploded view of the trip mechanism of the present utility model;
FIG. 4 is a schematic view of the structure of the trip buckle of the present utility model;
fig. 5 is a schematic structural view of the stent of the present utility model.
Detailed Description
Referring to fig. 1 to 5, the miniature circuit breaker of the present utility model comprises a housing 1, an operating handle 2 pivotally connected to the upper end of the housing 1, and a trip mechanism 3, a solenoid mechanism 4, a stationary contact 5, a bimetal 6 and an arc extinguishing chamber 7 which are arranged in the housing 1. The tripping mechanism 3 comprises a bracket 8 and a lock catch 9 which are axially connected in the shell 1 through a main shaft 10, and a tripping buckle 1 which is axially connected to the upper end of the bracket 8. The bracket 8 is arranged in the lock catch 9. The jump button 11 is connected with the operating handle 2 through a connecting rod 12, and the lock catch 9 is connected with the bimetallic strip 6 through a pull rod 13. A rivet 39 at the lower end of the bracket 8 is connected with the movable contact 14 in an axial way. One end of the moving contact 14 is connected with the upper end of the bimetallic strip 6 through a flexible connecting conductor 42. The jump button 11 is integrally injection molded, the jump button 11 is provided with a first shaft joint part 15 and a second shaft joint part 16, the first shaft joint part 15 is provided with a first shaft hole 17, the second shaft joint part 16 is provided with a second shaft hole 18, and the end part of the connecting rod 12 is in shaft connection with the first shaft hole 17 of the first shaft joint part 15. The bracket 8 comprises an upper bracket plate 19 and a lower bracket plate 20 which are integrally formed, the upper ends of the upper bracket plate 19 and the lower bracket plate 20 are provided with a third shaft hole 21 which is coaxially arranged, the second shaft joint part 16 is arranged between the upper bracket plate 19 and the lower bracket plate 20, the second shaft hole 18 is connected with the third shaft hole 21 through a pin shaft 22, the first shaft joint part 15 is provided with a lock hook 40, and the lock catch 9 is provided with a hanging table 41 which is in hanging fit with the lock hook 40.
Preferably, a guide portion 2 capable of being inserted between the upper bracket plate 19 and the lower bracket plate 20 is disposed between the first shaft connection portion 15 and the second shaft connection portion 16, and the guide portion 23 extends to the latch hook 40. When the circuit breaker is closed, the guiding portion 23 is embedded between the upper support plate 19 and the lower support plate 20, so as to ensure that the latch hook 40 is accurately buckled into the hanging table 41, and simultaneously ensure the stability of connection between the trip buckle 11 and the latch 9. In addition, the guide portion 23 extends to the latch hook 40, so that the strength of the latch hook 40 can be improved to prevent breakage during opening and closing.
Preferably, a first positioning portion 24 is provided at the lower end of the latch hook 40, corresponding to both sides of the guide portion 23, for positioning the ends of the upper bracket plate 19 and the lower bracket plate 20. When the breaker is closed, the first positioning portion 24 is supported at the ends of the upper support plate 19 and the lower support plate 20, so as to perform the positioning and the stability after connection of the trip buckle 11.
Preferably, an adjusting screw assembly 25 is disposed at one side of the lower end of the bimetal 6, and the adjusting screw assembly 25 includes a nut 26 embedded in the housing 1 and a screw 27 screwed with the nut 26, and the bimetal 6 can be moved closer to or away from the bimetal by rotating the screw 27. For adjusting the bimetal 6 to a specific position so that the thermal trip performance of the circuit breaker meets the requirements.
Preferably, an opening and closing indicator 28 is axially connected in the casing 1, and the lower end of the pin 22 is connected to a kidney-shaped hole 29 at the lower end of the opening and closing indicator 28. When the circuit breaker is in switching on/off, the pin 22 can drive the switching on/off indicator 28 to rotate so as to realize switching on/off indication of the circuit breaker.
Preferably, the latch 9 is provided with a torsion spring 30, an upper arm of force of the torsion spring 30 is connected with a first arm of force positioning slot 32 on the bracket 8, and a lower arm of force is connected with a second arm of force positioning slot 34 on the latch 9. The upper end of the movable contact 14 is provided with a positioning groove 37 matched with the main shaft 10 and a tension spring 38 connected with the shell 1. So as to improve the sensitivity and stability of the opening and closing of the circuit breaker.
Preferably, a second positioning portion 35 for positioning the connecting rod 12 is integrally formed on one side of the upper end of the first shaft portion 15 of the trip buckle 11, so as to improve the stability of opening and closing of the circuit breaker.
Preferably, the bimetal 6 is connected with an arc striking plate 36 extending to the bottom of the arc extinguishing chamber 7, so as to improve the arc striking capability of the circuit breaker.
Preferably, a positioning groove 37 matched with the main shaft 10 and a tension spring 38 connected with the shell 1 are arranged at the upper end of the movable contact 14. The main shaft 10 is disposed in the positioning groove 37 to limit the moving contact 14, so as to improve stability. The movable contact 14 can be reset more sensitively and can be better kept on the fixed contact 5 through the tension spring 38.
Although the present utility model has been described with respect to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications can be made without departing from the scope of the utility model, and the utility model is not limited to the specific embodiments described above, but is intended to cover all modifications, equivalents and alternatives falling within the scope of the utility model.
Claims (9)
1. The utility model provides a miniature circuit breaker, includes casing (1), coupling in handle (2) of casing (1) upper end and setting are in tripping device (3), solenoid mechanism (4), stationary contact (5), bimetallic strip (6) and explosion chamber (7) in casing (1), tripping device (3) are in including through main shaft (10) coupling support (8) and hasp (9) in casing (1) and coupling in jump knot (11) of support (8) upper end, jump knot (11) are connected with handle (2) through connecting rod (12), hasp (9) pass through pull rod (13) with bimetallic strip (6) are connected, the lower extreme coupling of support (8) has moving contact (14), its characterized in that: the jump knot (11) integrative injection moulding, and be equipped with first coupling portion (15) and second coupling portion (16), be equipped with first shaft hole (17) on first coupling portion (15), be equipped with second shaft hole (18) on second coupling portion (16), connecting rod (12) tip coupling in first shaft hole (17) of first coupling portion (15), support (8) are including integrated into one piece's last mounting plate (19) and lower mounting plate (20), the upper end of going up mounting plate (19) and lower mounting plate (20) is equipped with coaxial third shaft hole (21) that set up, second coupling portion (16) are established between last mounting plate (19) and lower mounting plate (20), just be connected through round pin axle (22) between second shaft hole (18) and third shaft hole (21), be equipped with latch hook (40) on first coupling portion (15), be equipped with on hasp (9) with latch hook (40) complex hanging platform (41).
2. The miniature circuit breaker of claim 1, wherein: a guide part (23) which can be embedded between the upper support plate (19) and the lower support plate (20) is arranged between the first shaft connection part (15) and the second shaft connection part (16), and the guide part (23) extends to the lock hook (40).
3. The miniature circuit breaker of claim 2, wherein: the lower end of the lock hook (40) and two sides corresponding to the guide part (23) are provided with first positioning parts (24) for positioning the ends of the upper support plate (19) and the lower support plate (20).
4. The miniature circuit breaker of claim 1, wherein: the bimetallic strip (6) lower extreme one side is equipped with adjusting screw subassembly (25), adjusting screw subassembly (25) include inlay nut (26) on casing (1) and with screw rod (27) of nut (26) spiro union, through rotatory screw rod (27) can be close to or keep away from bimetallic strip (6).
5. The miniature circuit breaker of claim 1, wherein: an opening and closing indicator (28) is connected to the inner shaft of the shell (1), and the lower end of the pin shaft (22) is connected to a kidney-shaped hole (29) at the lower end of the opening and closing indicator (28).
6. The miniature circuit breaker of claim 1, wherein: the lock catch (9) is provided with a torsion spring (30), an upper force arm of the torsion spring (30) is connected with a first force arm positioning groove (32) on the support (8), and a lower force arm is connected with a second force arm positioning groove (34) on the lock catch (9).
7. The miniature circuit breaker of claim 1, wherein: a second positioning part (35) for positioning the connecting rod (12) is integrally formed on one side of the upper end of the first shaft connection part (15) of the jump buckle (11).
8. The miniature circuit breaker of claim 1, wherein: the bimetallic strip (6) is connected with an arc striking strip (36) extending to the bottom of the arc extinguishing chamber (7).
9. The miniature circuit breaker of claim 1, wherein: the upper end of the moving contact (14) is provided with a positioning groove (37) matched with the main shaft (10) and a tension spring (38) connected with the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323130603.7U CN221176118U (en) | 2023-11-21 | 2023-11-21 | Small-sized circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323130603.7U CN221176118U (en) | 2023-11-21 | 2023-11-21 | Small-sized circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221176118U true CN221176118U (en) | 2024-06-18 |
Family
ID=91463507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323130603.7U Active CN221176118U (en) | 2023-11-21 | 2023-11-21 | Small-sized circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221176118U (en) |
-
2023
- 2023-11-21 CN CN202323130603.7U patent/CN221176118U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |