CN218160210U

CN218160210U - Circuit breaker

Info

Publication number: CN218160210U
Application number: CN202222344313.1U
Authority: CN
Inventors: 黄谢军; 曹健; 居春伟; 金建磊; 李学琳; 张盼
Original assignee: Shanghai Liangxin Electrical Co Ltd
Current assignee: Shanghai Liangxin Electrical Co Ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-12-27
Anticipated expiration: 2032-09-02

Abstract

The utility model relates to the technical field of low-voltage electrical appliances, in particular to a circuit breaker, which comprises a shell, a thermal element, a contact system and an electronic circuit board, wherein the thermal element, the contact system and the electronic circuit board are arranged in the shell; the static contact conducting rod of the thermal element and the contact system is respectively connected with a load busbar and a power supply busbar of an external conducting structure, and the load busbar, the thermal element, the contact system and the power supply busbar form a conducting loop; the circuit breaker further comprises a shunt which is arranged in the conductive loop in series and is electrically connected with the electronic circuit board. Compared with the structure that the shunt and an electronic circuit board for processing the collected current, the incoming line terminal and the outgoing line terminal are packaged into a whole base in the prior art, the current collection is realized by serially connecting the shunt in a conductive loop formed by the load busbar, the thermal element, the contact system and the power supply busbar, the circuit breaker has the advantages of simple structure, rapid action response and small occupied size, and is suitable for occasions with narrow installation space of the circuit breaker.

Description

Circuit breaker

Technical Field

The utility model belongs to the technical field of the low-voltage apparatus technique and specifically relates to a circuit breaker is related to.

Background

The detection of the direct current is one of the most important parts of the direct current molded case circuit breaker, and basically, a shunt is adopted as the collection of the direct current. In the prior art, a current divider for realizing a current collection function and an electronic circuit board for processing collected current are generally packaged with an incoming terminal and an outgoing terminal to form an integral base, so that the current divider and the electronic circuit board occupy most of the space of the integral base. The existing breaker with the shunt has larger volume and is difficult to meet the requirement of the market on the size miniaturization of the breaker.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a circuit breaker when can realize gathering the current signal in the circuit breaker conductive loop, reduces the volume of circuit breaker.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a circuit breaker comprises a shell, a thermal element, a contact system and an electronic circuit board, wherein the thermal element, the contact system and the electronic circuit board are arranged in the shell; the static contact conducting rod of the thermal element and the contact system is respectively connected with a load busbar and a power supply busbar of an external conducting structure, and the load busbar, the thermal element, the contact system and the power supply busbar form a conducting loop;

the circuit breaker further includes a shunt disposed in series with the conductive loop, and the shunt is electrically connected with the electronic circuit board.

Further, the shunt is connected in series with the load busbar or the power supply busbar.

Furthermore, the contact system comprises a moving contact component and a static contact component, the moving contact component comprises a moving contact conducting rod and a moving contact arranged at one end of the moving contact conducting rod, and the moving contact conducting rod is used for driving the moving contact to be in contact with or separated from the static contact component;

the shunt is connected in series with the moving contact conducting rod.

Furthermore, the moving contact conducting rod comprises a first moving contact conducting rod and a second moving contact conducting rod which are arranged in parallel, and the shunt is located between the first moving contact conducting rod and the second moving contact conducting rod.

Furthermore, the first moving contact conducting rod comprises a first part and a second part, and two ends of the shunt are respectively connected with the first part and the second part; or the like, or, alternatively,

the second moving contact conducting rod comprises a third part and a fourth part, and two ends of the shunt are respectively connected with the third part and the fourth part.

Furthermore, the moving contact assembly also comprises a soft connecting piece, and two ends of the soft connecting piece are respectively and electrically connected with the thermal element and the moving contact conducting rod;

the shunt is connected with the soft connecting piece in series.

Further, the flexible connector comprises a first portion and a second portion, and two ends of the shunt are respectively connected with the first portion and the second portion.

Further, the fixed contact assembly comprises the fixed contact conducting rod and a fixed contact arranged on the fixed contact conducting rod, and the movable contact is in contact with or separated from the fixed contact;

the circuit breaker further comprises a plugging system, and the hot element, the fixed contact conducting rod, the load busbar and the power supply busbar are in plugging fit with the plugging system.

Furthermore, the plugging system comprises two bridge-type contacts which are arranged in parallel;

the thermal element and the load busbar are respectively inserted at the upper end and the lower end of one of the bridge-shaped contacts, and the static contact conducting rod and the power supply busbar are respectively inserted at the upper end and the lower end of the other bridge-shaped contact.

Further, the shunt is connected to the conductive loop by welding.

Further, the shunt is connected to the conductive loop by means of a threaded connection.

The utility model has the advantages that:

the utility model provides a circuit breaker, which comprises a shell, a thermal element, a contact system and an electronic circuit board, wherein the thermal element, the contact system and the electronic circuit board are arranged in the shell; the static contact conducting rod of the thermal element and the contact system is respectively connected with a load busbar and a power supply busbar of an external conducting structure, and the load busbar, the thermal element, the contact system and the power supply busbar form a conducting loop; the circuit breaker further comprises a shunt which is arranged in the conductive loop in series and is electrically connected with the electronic circuit board. Compared with the structure that the shunt and the electronic circuit board for processing the collected current, the incoming line terminal and the outgoing line terminal are packaged into a whole base in the prior art, the current collection is realized by serially connecting the shunt in the conductive loop formed by the load busbar, the thermal element, the contact system and the power supply busbar, the circuit breaker has the advantages of simple structure, rapid action response and small occupied size, the size of the circuit breaker can be reduced, and the circuit breaker is suitable for occasions with narrow installation space.

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 prior art descriptions will be briefly described below, it is obvious that the drawings in the following descriptions are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a circuit breaker according to a first embodiment of the present invention;

fig. 2 is a schematic front view of a shunt in a circuit breaker according to a first embodiment of the present invention, in a welding manner;

fig. 3 is a schematic three-dimensional structure diagram of a shunt in a circuit breaker according to a first embodiment of the present invention when a welding method is adopted;

fig. 4 is a schematic front view of a shunt in a circuit breaker according to a first embodiment of the present invention, the shunt being connected to a screw;

fig. 5 is a schematic three-dimensional structure diagram of a shunt in a circuit breaker according to an embodiment of the present invention when the shunt is connected by a thread;

fig. 6 is a schematic structural diagram of a circuit breaker according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a circuit breaker according to a third embodiment of the present invention;

fig. 8 is a schematic connection diagram of a shunt in a circuit breaker according to a third embodiment of the present invention;

fig. 9 is a schematic structural diagram of a circuit breaker according to the fourth embodiment of the present invention.

Icon:

1-a shell; 2-a thermal element; 3-a contact system; 31-moving contact assembly; 311-moving contact conducting rod; 3111-a first moving contact conducting rod; 3112-a second moving contact conducting rod; 312-movable contact; 313-a flexible connector; 32-a stationary contact assembly; 321-a static contact conducting rod; 322-stationary contact; 4-an electronic circuit board; 5-load busbar; 6-power supply bus bar; 7-a flow divider; 8-plug system; 81-bridge type contacts.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that 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.

It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

It should be noted that, in the description of the present invention, the terms "connected" and "mounted" should be interpreted broadly, for example, they may be fixedly connected, detachably connected, or integrally connected; can be directly connected or connected through an intermediate medium; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example one

Referring to fig. 1, the present embodiment provides a circuit breaker, including a housing 1, and a thermal element 2, a contact system 3, and an electronic circuit board 4 disposed in the housing 1; the static contact conducting rods 321 of the thermal element 2 and the contact system 3 are respectively connected with a load busbar 5 and a power supply busbar 6 of an external conducting structure, and the load busbar 5, the thermal element 2, the contact system 3 and the power supply busbar 6 form a conducting loop; the circuit breaker further comprises a shunt 7, the shunt 7 is arranged in series in the conductive loop, and the shunt 7 is electrically connected with the electronic circuit board 4.

The utility model discloses a theory of operation does:

when the circuit breaker provided by the embodiment works, a conductive loop formed by the load busbar 5, the thermal element 2, the contact system 3 and the power supply busbar 6 in the circuit breaker is conducted, and when current flows through the conductive loop, the shunt 7 correspondingly generates a feedback model and transmits the feedback model to the electronic circuit board 4 through the auxiliary loop, so that the current signal collection is realized. The current signal can be displayed on the display screen of the electronic circuit board. After the current signal is transmitted to the electronic circuit board 4, the electronic circuit board processor analyzes and processes the current signal and outputs a signal to an external accessory execution unit (external accessories such as shunt excitation and the like), when the processor analyzes and judges that the current signal feeds back the current of the breaker and the current is abnormal, the external accessory execution unit acts, the breaker operation mechanism trips, and the breaker cuts off the current.

Compared with the structure that the shunt and the electronic circuit board for processing the collected current, the incoming line terminal and the outgoing line terminal are packaged into a whole base in the prior art, the embodiment has the advantages of simple structure, rapid action response and small occupied volume by serially connecting the shunt 7 in a conductive loop formed by the load busbar 5, the thermal element 2, the contact system 3 and the power supply busbar 6 so as to realize the collection of the current, and is suitable for occasions with narrow installation space of the circuit breaker.

In this embodiment, the shunt 7 is connected in series with the load busbar 5. In the embodiment, the shunt 7 is disposed outside the housing 1, so that the internal structure of the circuit breaker can be further simplified, and the volume of the circuit breaker can be reduced.

Referring to fig. 2 and 3, the shunt 7 may be connected to the conductive loop by soldering. Specifically, the load busbar 5 includes a first load busbar and a second load busbar, the shunt 7 is disposed between the first load busbar and the second load busbar, and the upper end and the lower end of the shunt 7 are welded to the first load busbar and the second load busbar, respectively.

Referring to fig. 4 and 5, the shunt 7 may also be connected to the conductive loop by means of a screw connection. Specifically, the upper end and the lower end of the shunt 7 are respectively connected with the first load busbar and the second load busbar through screws.

Example two

Referring to fig. 6, the difference between the present embodiment and the first embodiment is: the shunt 7 is connected in series with the power supply bus bar 6.

Other structures and working principles are the same as those of the first embodiment.

EXAMPLE III

The difference between this embodiment and the first embodiment is as follows:

referring to fig. 7, the contact system 3 includes a moving contact assembly 31 and a static contact assembly 32, the moving contact assembly 31 includes a moving contact conductive rod 311 and a moving contact 312 disposed at one end of the moving contact conductive rod 311, and the moving contact conductive rod 311 is configured to drive the moving contact 312 to contact with or separate from the static contact assembly 32; the shunt 7 is connected in series with the movable contact conductive rod 311.

In the embodiment, the shunt 7 is arranged inside the housing 1, so that the structure of the circuit breaker is more compact; the shunt 7 is connected in series with the moving contact conductive rod 311, so that the shunt 7 can move synchronously along with the opening and closing actions of the moving contact conductive rod 311, the current flowing through the moving contact conductive rod 311 can flow through the shunt 7, and the accuracy of current collection is improved.

Further, the fixed contact assembly 32 includes a fixed contact conductive rod 321 and a fixed contact 322 disposed on the fixed contact conductive rod 321, and the movable contact 312 is in contact with or separated from the fixed contact 322.

In this embodiment, since the shunt 7 does not occupy the internal space of the circuit breaker, the space left inside the circuit breaker can be provided with the plug system 8, and the hot element 2, the static contact conducting rod 321, the load busbar 5 and the power supply busbar 6 are in plug-in fit with the plug system 8, so as to realize the rapid plug-in and pull-out of the circuit breaker.

Specifically, the plugging system 8 includes two bridge-type contacts 81 arranged in parallel; the thermal element 2 and the load busbar 5 are respectively inserted into the upper and lower ends of one of the bridge-type contacts 81, and the static contact conductive rod 321 and the power busbar 6 are respectively inserted into the upper and lower ends of the other bridge-type contact 81.

Referring to fig. 8, in this embodiment, the movable contact conducting rod 311 includes a first movable contact conducting rod 3111 and a second movable contact conducting rod 3112 which are arranged in parallel, and the shunt 7 is located between the first movable contact conducting rod 3111 and the second movable contact conducting rod 3112. Correspondingly, two movable contacts 312 are also disposed, and are disposed on the first movable contact conducting rod 3111 and the second movable contact conducting rod 3112 respectively. The arrangement of the first moving contact conducting rod 3111 and the second moving contact conducting rod 3112 improves the reliability of the on-off current of the circuit breaker; the shunt 7 is disposed between the first moving contact conducting bar 3111 and the second moving contact conducting bar 3112, so as to maximally reduce the space occupied by the shunt 7.

Specifically, the first moving contact conductive rod 3111 includes a first portion and a second portion, and two ends of the shunt 7 are respectively connected to the first portion and the second portion; alternatively, the second movable contact conductive bar 3112 includes a third portion and a fourth portion, and both ends of the shunt 7 are connected to the third portion and the fourth portion, respectively.

Example four

The difference between this embodiment and the third embodiment is as follows:

referring to fig. 9, the movable contact assembly 31 further includes a soft connection member 313, and two ends of the soft connection member 313 are electrically connected to the thermal element 2 and the movable contact conductive rod 311, respectively; the shunt 7 is connected in series with the flexible connection 313. The embodiment can still ensure that the current flowing through the moving contact conducting rod 311 can flow through the shunt 7, so as to improve the accuracy of current collection, and the shunt 7 does not need to follow the moving contact conducting rod 311 to act simultaneously, so that the looseness of a wire connected with the shunt 7 is avoided.

Specifically, the flexible connection member 313 includes a first portion and a second portion to which both ends of the shunt 7 are connected, respectively. Preferably, both ends of the flow divider 7 are welded with the first and second portions, respectively.

Other structures and working principles are the same as those of the third embodiment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A circuit breaker is characterized by comprising a shell (1), a thermal element (2), a contact system (3) and an electronic circuit board (4), wherein the thermal element, the contact system and the electronic circuit board are arranged in the shell (1); the static contact conducting rod (321) of the thermal element (2) and the contact system (3) are respectively connected with a load busbar (5) and a power supply busbar (6) of an external conducting structure, and the load busbar (5), the thermal element (2), the contact system (3) and the power supply busbar (6) form a conducting loop;

the circuit breaker further comprises a shunt (7), the shunt (7) is connected in series with the conductive loop, and the shunt (7) is electrically connected with the electronic circuit board (4).

2. The circuit breaker according to claim 1, characterized in that the shunt (7) is connected in series with the load busbar (5) or the power busbar (6).

3. The circuit breaker according to claim 1, wherein the contact system (3) comprises a moving contact component (31) and a fixed contact component (32), the moving contact component (31) comprises a moving contact conducting rod (311) and a moving contact (312) arranged at one end of the moving contact conducting rod (311), and the moving contact conducting rod (311) is used for driving the moving contact (312) to contact with or separate from the fixed contact component (32);

the shunt (7) is connected in series with the moving contact conducting rod (311).

4. The circuit breaker according to claim 3, wherein the movable contact conducting rod (311) comprises a first movable contact conducting rod (3111) and a second movable contact conducting rod (3112) which are arranged side by side, and the shunt (7) is located between the first movable contact conducting rod (3111) and the second movable contact conducting rod (3112).

5. The circuit breaker according to claim 4, characterized in that said first movable contact conducting bar (3111) comprises a first portion and a second portion, to which two ends of said shunt (7) are connected respectively; or the like, or, alternatively,

the second moving contact conducting rod (3112) comprises a third part and a fourth part, and two ends of the shunt (7) are respectively connected with the third part and the fourth part.

6. The circuit breaker according to claim 3, wherein said moving contact assembly (31) further comprises a soft connection member (313), both ends of said soft connection member (313) are electrically connected with said thermal element (2) and said moving contact conductive rod (311), respectively;

the shunt (7) is connected in series with the soft connecting piece (313).

7. The circuit breaker according to claim 6, characterized in that said soft connection (313) comprises a first and a second portion, to which the two ends of said shunt (7) are connected, respectively.

8. The circuit breaker according to claim 3, wherein the fixed contact assembly (32) comprises the fixed contact conductive rod (321) and a fixed contact (322) disposed on the fixed contact conductive rod (321), and the movable contact (312) is in contact with or separated from the fixed contact (322);

the circuit breaker further comprises a plug-in system (8), wherein the hot element (2), the static contact conducting rod (321), the load busbar (5) and the power supply busbar (6) are in plug-in fit with the plug-in system (8).

9. The circuit breaker according to claim 8, characterized in that said plugging system (8) comprises two bridge-type contacts (81) arranged side by side;

the thermal element (2) and the load busbar (5) are respectively inserted into the upper end and the lower end of one of the bridge-type contacts (81), and the static contact conducting rod (321) and the power supply busbar (6) are respectively inserted into the upper end and the lower end of the other bridge-type contact (81).

10. The circuit breaker according to any of claims 1 to 9, characterized in that said shunt (7) is connected in said conductive circuit by means of welding.

11. The circuit breaker according to any of claims 1 to 9, characterized in that the shunt (7) is connected in the conductive circuit by means of a screw connection.