CN218548348U

CN218548348U - Operating mechanism for switching-on/off miniature circuit breaker and miniature circuit breaker with operating mechanism

Info

Publication number: CN218548348U
Application number: CN202222716374.6U
Authority: CN
Inventors: 郭顺风; 周辉; 张�林; 范文哲; 冯锡丽
Original assignee: Eaton Electric Ltd
Current assignee: Eaton Electric Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-02-28
Anticipated expiration: 2032-10-14

Abstract

The utility model relates to an operating device and miniature circuit breaker that has it for divide-shut brake miniature circuit breaker. The operating mechanism includes: a handle pivotable about a handle pivot; a latch connected to the handle and having a first indication portion; the contact support piece can pivot around a support pivot and is provided with a second indicating part, and the lock catch is arranged on the contact support piece in a pivoting mode; the release piece is pivotally arranged on the contact support piece and has a first posture connected with the lock catch and a second posture disconnected with the lock catch; wherein one of the first and second indication parts is configured as an opening indication and the other is configured as a closing indication. The utility model discloses indicate the divide-shut brake of miniature circuit breaker integrated on original component hasp and contact support piece, save independent divide-shut brake and indicate the component, simplify miniature circuit breaker structure and optimize the overall arrangement, save material.

Description

Operating mechanism for switching-on/off miniature circuit breaker and miniature circuit breaker with operating mechanism

Technical Field

The utility model relates to a low-voltage apparatus technical field especially relates to a miniature circuit breaker that is used for divide-shut brake miniature circuit breaker's operating device and has it.

Background

A Miniature Circuit Breaker (MCB) is typically provided with an on/off indication to indicate the closed and open states. Such opening and closing indication is generally independently provided in a case of the micro circuit breaker and moves with the opening and closing to transfer a current state of the micro circuit breaker to the outside. In order to distinguish between opening and closing, it is also necessary to distinguish the individual opening and closing indications in terms of appearance, for example, by applying different colors. This results in a complicated internal structure of the miniature circuit breaker, which is not conducive to the development of miniaturization.

Therefore, there is a need in the industry for an improved miniature circuit breaker to simplify the structure.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an operating device that can solve above-mentioned technical problem at least, this operating device is used for divide-shut brake miniature circuit breaker.

The utility model discloses still aim at providing an use above-mentioned modified operating device's miniature circuit breaker.

According to the utility model discloses an aspect provides an operating device for divide-shut brake miniature circuit breaker, include: a handle pivotable about a handle pivot; a latch connected to the handle and having a first indicating portion; the contact support piece can pivot around a support pivot and is provided with a second indicating part, and the lock catch is arranged on the contact support piece in a pivoting mode; the release piece is pivotally arranged on the contact support piece and has a first posture connected with the lock catch and a second posture disconnected with the lock catch; wherein one of the first and second indication parts is configured as an opening indication and the other is configured as a closing indication.

In some embodiments, the latch includes a latch body pivotally disposed on the contact support and connected to the handle, a support arm extending from the latch body, and the first indicator is disposed at an extending end of the support arm.

In some embodiments, the first indicator has a circular arc indicating interface centered on the pivot axis of the latch.

In some embodiments, the second indicator has a circular arc indicating interface centered on the pivot axis of the contact support.

In some embodiments, a first biasing member is disposed between the handle and the release member, the first biasing member applying a biasing force to the handle to rotate in a first direction and applying a biasing force to the release member to rotate in the first direction to engage the catch.

In some embodiments, the first biasing member is a torsion spring having a first leg abutting the handle and a second leg abutting the release member.

In some embodiments, the release member abuts the catch from a side of the catch facing the handle under the bias of the first biasing member.

In some embodiments, the contact support member has a second biasing member abutting against it, the second biasing member applying a biasing force to the contact support member causing it to rotate in a second direction.

In some embodiments, the pivot axis of the contact support coincides with the pivot axis of the latch.

According to another aspect of the present invention, there is provided a miniature circuit breaker, including: a housing having an indication window; an operating mechanism as described above, wherein the handle pivot and the support pivot are provided in the housing, and the first indicator portion and the second indicator portion are selectively aligned with the indicator window; the contact system comprises a moving contact arranged on the contact support and a fixed contact arranged on the shell; and the brake-separating actuating mechanism is arranged corresponding to the tripping piece and can apply actuating force to the tripping piece to enable the tripping piece to rotate along the second direction so as to be disconnected with the lock catch.

Additional features and advantages of the invention will be set forth in part in the description which follows, and in part will be apparent to those having ordinary skill in the art upon examination of the following, or may be learned from the practice of the invention.

Drawings

Embodiments of the present invention are described in detail below with reference to the attached drawing figures, wherein:

fig. 1 is a schematic diagram of a miniature circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic view of a view angle inside a miniature circuit breaker according to an embodiment of the present invention;

fig. 3 is a schematic view of another view of the interior of a miniature circuit breaker according to an embodiment of the present invention;

fig. 4 is a schematic diagram of an operating mechanism of a miniature circuit breaker according to an embodiment of the present invention.

Description of reference numerals:

1. a miniature circuit breaker; 2. a housing; 21. a handle pivot; 22. a support pivot; 23.

an indication window; 3. an operating mechanism; 31. a handle; 311. an orifice; 32. locking; 32

1. A latch body; 322. a support arm; 323. a first indication unit; 33. releasing the fastener; 3

31. A chute; 34. a contact support; 341. a second indication unit; 342. a latch pivot;

35. a first biasing member; 351. a first leg; 352. a second leg; 36. second bias

Pressing a piece; 37. a connecting rod; 41. a moving contact; 42. static contact; 5. an arc extinguishing chamber; 6. is divided into

A gate actuation mechanism; 61. a brake-separating armature iron; 62. a coil; 71. a first connection terminal; 72.

a second connection terminal; 8. baffle plate

Detailed Description

Referring now to the drawings, exemplary aspects of the disclosed operating mechanism and a miniature circuit breaker having the same will be described in detail. Although the drawings are provided to present some embodiments of the invention, the drawings are not necessarily to scale of particular embodiments, and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the disclosure of the present invention. The position of some components in the attached drawings can be adjusted according to actual requirements on the premise of not influencing the technical effect. The appearances of the phrase "in the drawings" or similar language in the specification are not necessarily referring to all drawings or examples.

Certain directional terms used hereinafter to describe the drawings, such as "inner", "outer", "above", "below", and other directional terms, will be understood to have their normal meaning and refer to those directions as they normally relate to when viewing the drawings. Unless otherwise indicated, the directional terms described herein are generally in accordance with conventional directions as understood by those skilled in the art.

The terms "first," "second," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another.

Fig. 1 to 4 exemplarily show a miniature circuit breaker 1 according to the present invention. As shown in fig. 1, the miniature circuit breaker 1 defines an inner space with a housing 2 to accommodate an operating mechanism, a contact system, an arc extinguishing system, a breaking actuation mechanism, a circuit, and the like. The case 2 defines an indication window 23 for displaying an opening or closing state of the micro circuit breaker 1.

Fig. 2 and 3 show the structure and layout of the interior of the housing 2 in two opposite views. As shown in the figure, the first connection terminal 71 and the second connection terminal 72 are respectively disposed on opposite sides of the housing 2, and an operating mechanism, a contact system, an arc extinguishing system, a brake opening actuating mechanism, and the like are disposed therebetween.

Fig. 4 shows an exemplary detail of the operating mechanism 3. As shown in fig. 2 to 4, the operating mechanism 3 includes a handle 31, a lock catch 32 controllable by the handle 31, and a release member 33. The handle 31 has an aperture 311 for passing through a handle pivot 21 provided on the inner wall of the housing 2, whereby the handle 31 can pivot about the handle pivot 21. A portion of the handle 31 extends out of the housing 2 for manual opening and closing operation. The handle 31 is provided with a first biasing member 35, which first biasing member 35 always applies a biasing force to the handle 31 that causes it to pivot in a first direction (clockwise as viewed in fig. 2) or tends to pivot in the first direction. Once the handle 31 is pivoted in this first direction, it means that the miniature circuit breaker is open.

The handle 31 is connected to the latch 32 by a link 37 and the latch 23 is pivotably connected to the contact support 34 by a latch pivot 342. The latch pivot 342 may be a shaft that integrally extends from the contact support 34. The contact support 34 is pivotally journalled on a support pivot 22 provided on the inner wall of the housing 2. A second biasing member 36 is pressed between the contact support member 34 and the inner wall of the housing 2, the second biasing member 36 always applying a biasing force to the contact support member 34 causing it to pivot in the second direction (counterclockwise in fig. 2) or a tendency to pivot in the second direction. Once the contact support 34 is pivoted in the second direction, it means that the miniature circuit breaker is opened.

The release 33 is pivotably connected to the contact support 34. In the embodiment shown, the pivot axis of the release 33 coincides with the pivot axis of the contact support 34, which can be achieved by the release 33 also being sleeved on the support pivot 22, or the release 33 can be sleeved on a shaft formed on the support pivot 22 and coaxial with the support pivot 22.

During the closing of the miniature circuit breaker 1, the release 33 is always engaged with the latch 32. The aforementioned first biasing member 35 capable of biasing the handle 31 also applies a biasing force to the trip member 33 to pivot or generate a tendency to pivot in the first direction, so as to press the trip member 33 against the latch 32, to restrict the pivoting of the latch 32 together with the contact support 34 under the biasing of the second biasing member 36, and to maintain the miniature circuit breaker 1 in the closed state. When a prescribed circuit condition (e.g., short circuit, overload, etc.) occurs, the release member 33 is pivoted in the second direction against the biasing force of the first biasing member 35 by the opening actuation mechanism 6, and is released from the latch 32. The unlocking of the release 33 from the latch 32 allows the opening of the miniature circuit breaker 1.

The trip member 33 may be further formed with a slide groove 331, the slide groove 331 being configured in an arc shape centering on the pivot axis of the trip member 33. One end of the limiting rod 38 is inserted into the sliding groove 331 and can move along the sliding groove 331, and the other end is fixed to the housing 2. During the pivoting of the release member 33 about the support pivot 22, the stopper rod 38 moves along the slide groove 331, limiting the pivoting angle of the release member 33.

The first biasing member 35 disposed between the handle 31 and the release member 33 to simultaneously apply a biasing force to both the handle 31 and the release member 33 may be a torsion spring that is sleeved on the handle pivot 21, a first leg 351 of the torsion spring abutting the handle 31 to bias the handle 31 in the first direction, and a second leg 352 abutting the release member 33 on a side of the release member 33 facing away from the catch 32 and biasing the release member 33 in the first direction to thereby urge the release member 33 against the catch 32 from a side of the catch 32 facing the handle 31 for locking engagement therewith. Once the prescribed circuit condition is removed, the driving force of the opening actuator 6 is removed, and the release member 33 is pivoted in the first direction to re-engage with the catch 32 under the bias of the first biasing member 35.

The first biasing member 35 can simultaneously act on the handle 31 and the trip member 33, and combines the functions originally realized by the two biasing members into one member of the first biasing member 35, thereby simplifying the structure, saving materials and facilitating the optimization of the internal layout of the miniature circuit breaker. Of course, it is also conceivable for the person skilled in the art to use two biasing members for biasing the handle in the first direction and the release member 33 in the first direction, respectively, for example a torsion spring arranged between the housing and the handle, and a torsion spring arranged between the support pivot 22 and the release member 33.

In order to clearly communicate the current switching-on/off state of the miniature circuit breaker to the outside, the operating mechanism 2 is provided with an indicating part, and the indicating part is integrated on the original component of the operating mechanism 2. In the embodiment shown, the first indicator 323 is integrated in the latch 32, while the second indicator 341 is integrated in the contact support 34.

As shown in detail in fig. 4, a support arm 322 extends from the latch body 321 of the latch 32 toward the side wall of the housing 2, and a first indicator 323 is formed at an extending end of the support arm 322. During pivoting of the latch 32 about the latch pivot 342, the first indication portion 323 can follow to align with the indication window 23 of the housing 2 or be misaligned with the indication window 23 to indicate a first state of the miniature circuit breaker 1, such as an open state. In one embodiment, only a surface of the first indicating part 323 facing the side wall of the housing 2 may be configured as an arc-shaped indicating surface centering on the pivot axis of the latch 32, or the entirety of the first indicating part 323 may be configured as an arc-shaped indicating section centering on the pivot axis of the latch 32.

Furthermore, the contact support 34 is formed with a bend at one end near the side wall of the housing 2, which bend is configured as a second indicator 341. The second indicator 341 may be selectively aligned with or misaligned with the indicator window 23 of the case 2 during pivoting of the contact support 34 about the support pivot 22 to indicate a second state of the miniature circuit breaker 1, for example a closed state. In one embodiment, only the surface of the second indicator portion 341 facing the side wall of the housing 2 may be configured as an arc-shaped indicator face centered on the pivot axis of the contact support 34, or the entirety of the second indicator portion 341 may be configured as an arc-shaped indicator section centered on the pivot axis of the contact support 34.

Such an arc-shaped indication surface or arc-shaped indication section can fit more closely to the indication window 23 when the latch 32 or the contact support 34 is moved to align the first indication portion 323 or the second indication portion 341 with the indication window 23, so that the information is transmitted more clearly. The inner wall of the housing 2 corresponding to the indicator window 23 can also be adapted to form a curved wall section.

Although the utility model discloses the first instruction portion integration that will instruct the separating brake is on the hasp to the second instruction portion integration that will instruct the combined floodgate is on contact support piece, make two instruction portions can the alternative aim at the instruction window during hasp and contact support piece motion, but those skilled in the art will understand, the first instruction portion that instructs the separating brake also can be integrated on contact support piece alternatively, the second instruction portion integration that will instruct the combined floodgate simultaneously is on the hasp, make two instruction portions can the alternative aim at the instruction window of shell with the present divide-shut brake state of miniature circuit breaker during hasp and contact support piece motion. The first and

second indicators

323 and 341 may be marked with "ON", "OFF", "ON", or "OFF", or may be coated with different colors, such as green and red, to transmit clear information.

As shown in fig. 2 and 3, in the housing 2, the opening actuation mechanism 6 that drives the release member 33 is arranged corresponding to the release member 33. According to an embodiment of the present invention, the opening actuator 6 is configured as an electromagnetic trip mechanism, wherein the coil 62 is electrically connected to the first connection terminal 71, and the opening armature 61 is movably disposed along its axis and surrounded by the coil 62. When a prescribed circuit condition occurs, the coil 62 is energized to drive the opening armature 61 to move close to and strike the release member 33, so that the release member 33 pivots in the second direction, causing the release member 33 to unlock the latch 32 against the biasing force of the first biasing member to allow the miniature circuit breaker 1 to open.

In the miniature circuit breaker 1 of the present invention, the movable contact 41 of the contact system is mounted on the contact support 34 and electrically connected to the second connection terminal 72, while the stationary contact 42 is fixed in the housing 2, for example, on a mounting plate for mounting the opening actuating mechanism 6. During the pivoting of the contact support 34 about the support pivot 22, the moving contact 41 is brought into and out of engagement with the stationary contact 42.

The arc extinguishing system is installed corresponding to the stationary contact 42. As shown in fig. 2 and 3, the arc extinguishing chamber 5 is arranged directly below the stationary contact 42. Baffles 8 extending towards the arc chute 5 may also be arranged on opposite sides of the stationary contact 42 to ensure that the arc is directed towards the arc chute 5.

It should be understood that although the description is in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above description is only illustrative of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes, modifications and combinations that may be made by those skilled in the art without departing from the spirit and principles of the invention should be considered within the scope of the invention.

Claims

1. An operating mechanism for a miniature opening and closing circuit breaker, comprising:

a handle (31) pivotable about a handle pivot (21);

a latch (32) connected to the handle (31) and having a first indication portion (323);

a contact support (34) pivotable about a support pivot (22) and having a second indicator (341), the latch (32) being pivotably provided on the contact support (34);

a release member (33) pivotally provided to the contact support member (34) and having a first posture engaged with the lock catch (32) and a second posture disengaged from the lock catch (32);

wherein one of the first indicating part (323) and the second indicating part (341) is configured as an opening indication, and the other is configured as a closing indication.

2. The operating mechanism according to claim 1, wherein the latch (32) comprises a latch body (321) pivotally arranged at the contact support (34) and connected to the handle (31), a support arm (322) extending from the latch body (321), and the first indicator portion (323) is arranged at an extending end of the support arm (322).

3. The operating mechanism of claim 1 wherein the first indicator portion (323) has a circular arc indicating interface centered on the pivot axis of the latch (32).

4. Operating mechanism according to claim 1, characterized in that the second indicator (341) has a circular arc indicating interface centered on the pivot axis of the contact support (34).

5. The operating mechanism according to any one of claims 1 to 4, wherein a first biasing member (35) is provided between the handle (31) and the release member (33), the first biasing member (35) applying a biasing force to the handle (31) to rotate it in a first direction and applying a biasing force to the release member (33) to rotate it in a first direction to engage the catch (32).

6. Operating mechanism according to claim 5, characterized in that the first biasing member (35) is a torsion spring, a first leg (351) of which abuts against the handle (31) and a second leg of which abuts against the release member (33).

7. The operating mechanism according to claim 5, wherein the release member (33) abuts against the catch (32) from a side of the catch (32) facing the handle (31) under the bias of the first biasing member (35).

8. Operating mechanism according to any one of claims 1 to 4, characterized in that the contact support (34) has a second biasing member (36) in abutment, the second biasing member (36) exerting a biasing force on the contact support (34) causing it to rotate in a second direction.

9. Operating mechanism according to any one of claims 1 to 4, characterized in that the pivot axis of the contact support (34) coincides with the pivot axis of the catch (32).

10. A miniature circuit breaker, comprising:

a housing (2) having an indication window (23);

an operating mechanism (3) as claimed in any one of claims 1 to 9, wherein the handle pivot (21) and the support pivot (22) are provided in the housing (2), the first indicator portion (323) and the second indicator portion (341) being selectively aligned with the indicator window (23);

the contact system comprises a movable contact (41) arranged on the contact support (34) and a fixed contact (42) arranged on the shell (2);

and the brake-separating actuating mechanism (6) is arranged corresponding to the tripping piece (33) and can apply actuating force to the tripping piece (33) to enable the tripping piece to rotate along a second direction to be disconnected with the lock catch (32).