CN214378296U - Small-sized circuit breaker - Google Patents

Abstract

The utility model relates to a leakage circuit breaker technical field, concretely relates to miniature circuit breaker, wherein miniature circuit breaker includes operating device, operating device includes jump buckle, hasp and contact support, jump buckle and hasp all with contact support pivot connection, hasp and jump buckle overlap joint, operating device still includes the hasp reset piece that makes the hasp reset, one end rigid coupling of hasp reset piece is on the contact support, the other end butt is on the hasp; when the circuit breaker is tripped, the lock catch rotates to be disconnected with the trip buckle by external force and drives the circuit breaker to be switched off, the lock catch reset piece applies positive reaction force to the lock catch, and the reaction force drives the lock catch to rotate in the positive direction to be reset to be connected with the trip buckle in a lap joint mode after the external force is cancelled. The reset force value of the lock catch reset piece can not be changed by the change of the motion state of the lock catch, the problem that the stability of the whole operating mechanism is poor due to the fact that the reset force value changes along with the change of the motion state of the mechanism by adopting the wavy elastic body as the reset piece is solved, and the lock catch reset piece is good in stability and reliable in reset.

Description

Small-sized circuit breaker

Technical Field

The utility model belongs to the technical field of the electric leakage circuit breaker, concretely relates to miniature circuit breaker.

Background

The circuit breaker is an important component of the electrical appliance industry and has been widely applied, and when an electrical circuit works normally, the circuit breaker can achieve the functions of power failure, power supply, circuit conversion and the like by closing or opening a circuit for supplying electric energy; when the electrical circuit is in overload, short circuit and other abnormalities, the circuit breaker can cut off the electrical circuit by tripping, so that the safety of workers and the normal operation of equipment are prevented from being endangered due to circuit faults.

The existing circuit breaker has two types of structures of modular assembly or integrated assembly. The modular assembly generally includes a universal circuit breaker module and a leakage release module. The general breaker module and the electric leakage release module are connected through a long lead. The existing general breaker module and the electric leakage release module are integrally designed in the same shell. A universal circuit breaker module is typically comprised of a housing, a handle, an operating mechanism, and a contact system. The operating mechanism comprises a linkage rod, a lock catch, a jump buckle and a contact support, the jump buckle is pivotally connected to the contact support and is connected with the handle through the linkage rod, and the lock catch is also pivotally connected to the contact support and can be lapped with the jump buckle. When an electric leakage fault occurs, the release pulls the lock catch to move to be separated from the tripping buckle and drive the breaker to open the brake. The existing operating mechanism is generally provided with a lever reset piece, the lever reset piece is made of plastic materials, the structural design is a wave-shaped elastic body, the lever reset is realized by utilizing deformation force generated by extrusion deformation between the wave-shaped elastic body and a contact support, the reset piece is easy to generate plastic deformation due to the material, and the reset force value of the reset piece is changed along with the change of the lap joint or the separation motion state of a jump buckle and a lock catch, so that the stability of the operating mechanism is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve lies in overcoming the reset force value that the lever of the circuit breaker resets the piece among the prior art and changes along with the hasp with the overlap joint of jump knot or the change of the motion state that breaks away from, leads to the relatively poor technical problem of operating device stability to a better miniature circuit breaker of stability is provided.

Therefore, an object of the utility model is to provide a miniature circuit breaker, including operating device, operating device includes jump knot, hasp and contact support, jump the knot with the hasp all with contact support pivotally connected, the hasp with jump the knot overlap joint, operating device still includes:

a latch resetting member for resetting the latch, wherein one end of the latch resetting member is fixedly connected to the contact support, and the other end of the latch resetting member abuts against the latch; when the circuit breaker is tripped, the lock catch is rotated by external force to be disconnected with the tripping buckle and drives the circuit breaker to be opened, the lock catch resetting piece is right the lock catch applies reaction force, and after the external force is cancelled, the reaction force drives the reverse rotation of the lock catch to be reset to be connected with the tripping buckle in a lap joint mode.

Optionally, the miniature circuit breaker, the hasp reset piece is the torsional spring, includes:

the body is arranged on the lock catch;

the first arm body is formed by extending the body outwards, and the end part of the first arm body, which is far away from the body, is fixed on the fixing part on the contact support;

the second arm body also extends outwards from the body and forms a preset included angle with the first arm body, and the end part of the second arm body, which is far away from the body, is abutted against the abutting part on the lock catch.

Optionally, the miniature circuit breaker, the latch comprises:

the contact support is provided with a first pivot hole, and the contact support is provided with a first pivot hole;

the buckle arm extends outwards from the lock buckle body, one end of the buckle arm, which is far away from the lock buckle body, is provided with a buckle part which is sunken from outside to inside, the rear end of the buckle part, which is positioned in the direction of separating the lock buckle from the jump buckle, is provided with a first abutting surface;

the end surface of the jump buckle facing the buckle arm is provided with a lapping part which protrudes outwards and extends and is lapped with the buckle part, and the lapping part is provided with a second abutting surface which can abut against the first abutting surface when in lapping.

Optionally, the miniature circuit breaker, the back of hasp body correspond on the side that the contact supported correspond first shaft hole position is equipped with along the outside extension post that extends of axial in first shaft hole, the body is suitable for cup jointing extend on the periphery of post.

Optionally, in the miniature circuit breaker, an extending wall extending away from the contact supporting direction is provided on a side surface of the latch body facing away from the contact support, the extending wall is formed as the abutting portion, and the second arm abuts against the extending wall.

Optionally, the miniature circuit breaker, the extension wall comprises:

one end of the first extending wall is connected with the lock catch body, the other end of the first extending wall extends towards the side surface which is far away from the lock catch body and is back to the contact support, and the extending direction of the first extending wall is vertical to the side surface;

the second extension wall is connected with one end, far away from the lock catch body, of the first extension wall, and the extension direction of the second extension wall forms an included angle with the extension direction of the first extension wall.

Optionally, the miniature circuit breaker, the side of the contact support facing the latch is provided with an extension portion protruding and extending towards the latch direction, and the fixing portion is disposed on the extension portion.

Optionally, in the miniature circuit breaker, the fixing portion is a fixing hole or a fixing groove formed on the extending portion.

Optionally, the miniature circuit breaker, the extension portion comprises:

one end of the first extension part is connected to the side surface of the contact support, which faces the lock catch, and the other end of the first extension part horizontally extends towards the lock catch;

the second extension part is connected to one end, far away from the contact support, of the first extension part and extends along the direction forming an included angle with the first extension part, a third extension part extending towards the contact support direction is arranged on the end, far away from the first extension part, of the second extension part, and a gap is formed between the third extension part and the contact support;

the first extension part, the second extension part and the third extension part jointly enclose the fixing part.

Optionally, the small circuit breaker, the side of the contact support facing the latch is provided with a yielding convex part located in the moving direction of the latch and the jump buckle.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a miniature circuit breaker resets through setting up the hasp on the hasp, and the hasp resets the one end of piece and fixes on the contact supports, the other end and hasp butt. Because the lock catch reset piece is additionally arranged between the lock catch and the contact support, the reset force value of the lock catch reset piece can not be changed by the change of the motion state of the mechanism, the lock catch can be reset reliably, and the problem that the stability of the whole operating mechanism is poor due to the fact that the wave-shaped elastic body is adopted as the reset piece and the reset force value changes along with the change of the motion state of the mechanism in the prior art is solved. The utility model discloses stability is better and reset reliably.

2. The utility model provides a miniature circuit breaker, hasp reset piece are the torsional spring, including body, the first arm body and the second arm body, the first arm body is fixed on the fixed part that the contact supported, and the butt is fixed on the butt portion of contact support to the second. Simple structure, low design cost and reliable reset.

3. The utility model provides a miniature circuit breaker is equipped with the extension wall on the hasp body, and the extension wall includes first extension wall and second extension wall, and first extension wall and second extension wall form roughly the L style of calligraphy, can form the effective butt to the second arm body, avoid in the hasp motion process, the second arm body breaks away from and loses the reset action with butt portion.

4. The utility model provides a miniature circuit breaker is equipped with the extension on the contact support, and the extension includes first extension, second extension and third extension, and first extension, second extension and third extension enclose into the fixed part of similar U type column structure, and simple structure can effectively realize fixing to the first arm body. The fixing part can also be a fixing hole or a fixing groove which is directly arranged on the extension part.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a miniature circuit breaker according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a case of the miniature circuit breaker of fig. 1 with a front side removed;

fig. 3 is a schematic perspective view illustrating a connection between an operating mechanism and a moving contact of a miniature circuit breaker according to an embodiment of the present invention;

fig. 4 is a schematic structural view of one of the angles of the latch of the operating mechanism of the miniature circuit breaker according to the embodiment of the present invention;

fig. 5 is a schematic structural view of another angle of the latch of the operating mechanism of the miniature circuit breaker according to the embodiment of the present invention;

fig. 6 is a schematic structural view of a side surface of a contact support of an operating mechanism of a miniature circuit breaker, which faces a latch, is located at the front side in an embodiment of the present invention;

fig. 7 is a schematic structural view of a side of a contact support of an operating mechanism of a miniature circuit breaker, which faces a latch, is located at the rear side in an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a trip buckle of an operating mechanism of a miniature circuit breaker according to an embodiment of the present invention.

Description of reference numerals:

1. a housing; 2. a handle; 3. an operating mechanism; 31. jumping and buckling; 311. a lapping part; 312. a second abutting surface; 313. a second shaft hole; 32. a contact support; 320. a fixed part; 321. an extension portion; 3211. a first extension portion; 3212. a second extension portion; 3213. a third extension portion; 322. a abdication convex part; 3221. a limiting inclined plane; 323. a second pivot; 324. a first pivot; 33. locking; 330. a lock catch body; 331. a buckle arm; 3311. a buckle part; 3312. a first abutting surface; 332. an extension wall; 3321. a first extension wall; 3322. a second extension wall; 333. extending the column; 3330. a first shaft hole; 34. a latch reset member; 341. a body; 342. a first arm body; 343. a second arm body; 35. a linkage rod; 36. a fastener; 4. moving contact.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The miniature circuit breaker of the present embodiment, as shown in fig. 1 to 8, includes a housing 1, a handle 2 movably disposed on the housing 1, an operating mechanism 3 connected to the handle 2 through a U-shaped linkage, and a contact system including a static contact disposed inside the housing 1 and a moving contact 4 disposed on the operating mechanism 3. The operating mechanism 3 includes a jumper 31, a latch 33, a contact support 32, and a latch reset member 34 for resetting the latch 33, wherein one end of the latch reset member 34 is fixed to the contact support 32, and the other end abuts against the latch 33. When the circuit breaker is tripped, the lock catch 33 rotates to be disconnected with the trip catch 31 by external force and drives the circuit breaker to open, the lock catch reset piece 34 applies positive reaction force to the lock catch 33, and the reaction force drives the lock catch 33 to rotate positively and reset to be connected with the trip catch 31 in a lap joint mode after the external force is removed.

In this embodiment, as shown in fig. 3, the latch 33 rotates counterclockwise to disconnect from the jump buckle 31 by an external force, where the external force refers to an acting force applied to the latch 33 when the electrical leakage release is tripped, after the circuit breaker is opened, the external force is removed, the latch resetting member 34 applies a clockwise reaction force to the latch 33, and the reaction force drives the latch 33 to rotate clockwise to reset to overlap with the jump buckle 31, so that the resetting is realized. Because the lock catch reset piece 34 is additionally arranged between the lock catch 33 and the contact support 32, the reset force value of the lock catch reset piece 34 is not changed by the change of the motion state of the contact support 32, so that the lock catch 33 can be reliably reset, and the problem that the stability of the whole operating mechanism 3 is poor due to the change of the reset force value caused by the adoption of the wavy elastic body as the reset piece in the prior art is solved. The utility model discloses stability is better and reset reliably.

Preferably, latch return 34 is a torsion spring. Specifically, as shown in fig. 3, the latch release 34 includes a body 341, a first arm 342 and a second arm 343. The body 341 is a hollow tubular spring tube, and the first arm 342 and the second arm 343 are disposed at two axial ends of the body 341 with a predetermined included angle. Specifically, a hollow extending column 333 which protrudes outward, i.e., forward as shown in fig. 3, is disposed on the lock catch 33 corresponding to the first shaft hole 3330 connected to the first pivot 324 on the contact support 32, and the first pivot 324 penetrates through the extending column 333. The body is sleeved on the periphery of the extending column 333. The end of the first arm 342 remote from the body 341 is fixed to the fixing portion 320 on the contact support 32. The end of the second arm 343 remote from the body 341 abuts against the abutment on the lock catch 33. As an alternative embodiment, the latch resetting member 34 of the present embodiment may also be a resetting member structure known to those skilled in the art and easily performing the same function of a torsion spring, such as a resetting spring, and the specific structure is not described and limited in detail.

As for the latch 33, as shown in fig. 4 to 5, the latch 33 includes a latch body 330 and a latch arm 331. The latch body 330 is substantially arc-shaped, the buckle arm 331 is formed by extending the top side wall of the latch body 330 upward, and a buckle portion 3311 overlapping with the release is disposed on one end of the buckle arm 331 away from the latch body 330. Specifically, the left upper end of the buckle arm 331 is provided with a downward-recessed buckle portion 3311, and the wall portion of the right upper end of the buckle portion 3311 is higher than the wall portion of the left upper end of the buckle portion 3311, specifically, the rear end of the buckle portion 3311 in the direction in which the buckle 33 is separated from the jumper buckle 31 is provided with a first abutting surface 3312, that is, the left wall surface of the wall portion of the right upper end of the buckle portion 3311 shown in fig. 5 is the first abutting surface 3312, correspondingly, as shown in fig. 8, the latch part 311 of the jump buckle 31 is formed with a second abutting surface 312, when the latch 33 and the jump buckle 31 are overlapped, the buckle portion 3311 is buckled with the buckle portion 311 and the first contact surface 3312 is contacted with the second contact surface 312 to maintain the state of the two buckles, meanwhile, when the lock catch 33 rotates counterclockwise by an external force, the first abutting surface 3312 abuts against the second abutting surface 312, that is, the jump buckle 31 rotates clockwise until the trip is completed with the lock catch 33, and the first abutting surface 3312 and the second abutting surface 312 are arranged to better realize the trip between the lock catch 33 and the jump buckle 31.

As shown in fig. 8, the jumper 31 is a cam-shaped structure, a second shaft hole 313 corresponding to the second pivot on the contact support 32 is formed on the jumper, a hook-shaped jumper 311 extending downward is formed at the bottom end of the jumper 31, and the outer side surface of the jumper 311, that is, the left side surface shown in fig. 8, is a second contact surface.

To facilitate the abutting connection of the second arm of the latch release 34 with the latch 33, as shown in fig. 4 and 5, an extension wall 332 is provided below the extension column 333, and the extension wall 332 extends from the side of the latch body 330 facing away from the contact holder 32, i.e., the front side of the latch body 330 shown in fig. 3, toward a direction away from the contact holder 32, i.e., toward the front side as shown in fig. 3. Specifically, as shown in fig. 4, the extension wall 332 includes a first extension wall 3321 and a second extension wall 3322. The first extending wall 3321 has one end connected to the latch body 330 and the other end extending forward toward the side away from the latch body 330 facing away from the contact support 32, i.e., the front side of the latch body 330 as shown in fig. 3. The second extending wall 3322 is connected to an end of the first extending wall 3321 away from the latch body 330, and an angle is formed between the extending direction of the second extending wall 3322 and the extending direction of the first extending wall 3321, that is, the extending wall 332 is substantially L-shaped, so that the second arm body can be effectively prevented from being pressed by the abutting portion to be separated from the abutting portion when the latch 33 rotates under an external force. In this embodiment, it is preferable that the extending direction of the second extending wall 3322 is perpendicular to the extending direction of the first extending wall 3321. As an alternative embodiment, the extending direction of the second extending wall 3322 may not be perpendicular to the extending direction of the first extending wall 3321, such as an acute angle. Optionally, the lock body 330 is provided with a through hole corresponding to the extending wall 332.

As for the contact holder 32, two pivots protruding forward are provided on the side of the contact holder 32 facing the latch 33 and the jumper 31, i.e. the front side as shown in fig. 5, which are a first pivot 324 and a second pivot 323, respectively, the second pivot 323 is located above the first pivot 324, the jumper 31 is pivotally connected to the second pivot 323, and the latch 33 is pivotally connected to the first pivot 324, i.e. the jumper 31 is located above the latch 33. The lower end of the contact support 32 is connected with a movable contact 4. The end surface of the contact support 32 facing away from the latch 33, i.e. the rear side as shown in fig. 3, is further provided with a third pivot (not shown), the third pivot is connected with a fastener 36, and the other end of the fastener 36 is connected with the latch 33 in a fastening manner.

An outer wall, namely a right wall surface shown in fig. 5, of the contact support 32 between the first pivot 324 and the second pivot 323 is provided with an extension 321 which protrudes and extends toward the latch 33, namely protrudes and extends forwards as shown in fig. 5, and the extension length of the extension 321 is consistent with the extension length of the extension column 333, namely, an end surface of the extension 321 away from the contact support 32 is substantially flat with an end surface of the extension column 333 away from the latch 33, namely, is on the same vertical plane. The fixing portion 320 is disposed on the extension portion 321. Alternatively, the fixing portion 320 is a fixing hole or a fixing groove formed on the extending portion 321. Alternatively, as shown in fig. 5, a relief protrusion 322 in the direction of disengaging the latch 33 from the jumper 31, i.e., in the above-mentioned counterclockwise direction of movement, is provided on the side of the contact support 32 facing the latch 33. The end surface of the receding protrusion 322 facing the buckle arm 331 of the buckle 33 is formed with a limit inclined surface 3221 matching with the buckle arm 331.

Preferably, as shown in fig. 7, the extension 321 of the present embodiment includes a first extension 3211, a second extension 3212, and a third extension 3213. The first extension portion 3211 has one end connected to the contact holder 32 and the other end extending horizontally toward the latch 33, i.e., forward as shown in fig. 3. The second extending portion 3212 is connected to an end of the first extending portion 3211 away from the contact support 32 and extends in a direction forming an included angle with the first extending portion 3211, in this embodiment, preferably, the second extending portion 3212 extends in a direction perpendicular to the first extending portion 3211, that is, the extending direction of the second extending portion 3212 is parallel to a plane of a side surface of the contact support 32 facing the latch 33. The third extending portion 3213 is disposed at an end of the second extending portion 3212 away from the first extending portion 3211 and extends toward the contact support 32, and a gap exists between the third extending portion 3213 and the contact support 32, that is, the length of the third extending portion 3213 is smaller than that of the first extending portion 3211, so that the first extending portion 3211, the second extending portion 3212 and the third extending portion 3213 together define a fixing portion 320 with a U-shaped structure. In this embodiment, the extending direction of the third extending portion 3213 is preferably parallel to the extending direction of the first extending portion 3211.

The circuit breaker of this embodiment also includes the arc extinguishing system of setting in casing 1 and sets up structures such as binding post and the conducting plate on casing 1. The circuit breaker is not particularly described or limited in detail, and is of a conventional structure of an existing circuit breaker.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. A miniature circuit breaker comprising an operating mechanism (3), said operating mechanism (3) comprising a trip (31), a latch (33) and a contact support (32), said trip (31) and said latch (33) all being pivotally connected to said contact support (32), said latch (33) overlapping said trip (31), characterized in that it further comprises:

a latch (33) reset piece for resetting the latch (33), wherein one end of the latch (33) reset piece is fixedly connected to the contact support (32), and the other end of the latch (33) is abutted to the latch (33); when the circuit breaker is tripped, the lock catch (33) is rotated by external force to be disconnected with the jump buckle (31) and drives the circuit breaker to be opened, the lock catch (33) resets and is right the lock catch (33) applies positive reaction force, and after the external force is cancelled the reaction force drives the lock catch (33) to rotate positively to reset to jump buckle (31) overlap joint.

2. A miniature circuit breaker according to claim 1, wherein said latch (33) return member is a torsion spring comprising:

a body (341) mounted on the latch (33);

a first arm (342) formed by extending the body (341) outward, and an end portion thereof away from the body (341) is fixed to a fixing portion (320) on the contact support (32);

the second arm body (343) also extends outwards from the body (341) and forms a preset included angle with the first arm body (342), and the end part of the second arm body, which is far away from the body (341), abuts against the abutting part on the lock catch (33).

3. A miniature circuit breaker according to claim 2 wherein said latch (33) comprises:

a latch body (330) having a first shaft hole (3330) formed therein for connection with a first pivot (324) provided on the contact support (32), the abutting portion being provided on the latch body (330);

a buckle arm (331) extending outward from the buckle body (330), wherein a buckle part (3311) recessed from outside to inside is arranged at one end of the buckle arm (331) far away from the buckle body (330), and a first abutting surface (3312) is formed at the rear end of the buckle part (3311) in the direction in which the buckle (33) and the jump buckle (31) are separated;

an overlapping part (311) which protrudes outwards and extends and is overlapped with the buckling part (3311) is formed on the end face of the jump buckle (31) facing the buckle arm (331), and a second abutting surface (312) which abuts against the first abutting surface (3312) when the overlapping part (311) is overlapped is formed.

4. The miniature circuit breaker as claimed in claim 3, wherein an extension column (333) extending outward in an axial direction of said first shaft hole (3330) is provided on a side of said latch body (330) facing away from said contact support (32) at a position corresponding to said first shaft hole (3330), said body (341) being adapted to be fitted over an outer periphery of said extension column (333).

5. The miniature circuit breaker according to claim 3, wherein an extension wall (332) extending in a direction away from said contact holder (32) is provided on a side of said latch body (330) facing away from said contact holder (32), said extension wall (332) being formed as said abutting portion, said second arm (343) abutting on said extension wall (332).

6. A miniature circuit breaker according to claim 5 wherein said extension wall (332) comprises:

a first extension wall (3321) having one end connected to the latch body (330) and the other end extending toward a side away from the latch body (330) facing away from the contact support (32) and extending in a direction perpendicular to the side;

the second extension wall (3322) is connected with one end of the first extension wall (3321) far away from the lock catch body (330), and the extension direction of the second extension wall (3322) forms an included angle with the extension direction of the first extension wall (3321).

7. The miniature circuit breaker according to claim 2, wherein said contact support (32) is provided with an extension portion (321) on a side thereof facing said latch (33) and protruding toward said latch (33), and said fixing portion (320) is provided on said extension portion (321).

8. A miniature circuit breaker according to claim 7, wherein said fixing portion (320) is a fixing hole or a fixing groove formed on said extending portion (321).

9. The miniature circuit breaker of claim 7 wherein said extension (321) comprises:

a first extension part (3211) having one end connected to a side surface of the contact support (32) facing the latch (33) and the other end extending horizontally in a direction facing the latch (33);

a second extension portion (3212) connected to an end of the first extension portion (3211) away from the contact support (32) and extending in a direction forming an included angle with the first extension portion (3211), wherein a third extension portion (3213) extending in a direction toward the contact support (32) is disposed on an end of the second extension portion (3212) away from the first extension portion (3211), and a gap is formed between the third extension portion (3213) and the contact support (32);

the first extension part (3211), the second extension part (3212) and the third extension part (3213) jointly enclose the fixing part (320).

10. A miniature circuit breaker according to claim 1, characterized in that a relief protrusion (322) in the direction of movement of the latch (33) away from the jumper (31) is provided on the side of the contact support (32) facing the latch (33).

Images