CN211350547U

CN211350547U - Plug-in type miniature circuit breaker

Info

Publication number: CN211350547U
Application number: CN202020437327.6U
Authority: CN
Inventors: 彭子龙; 孟亚军; 鲁开智
Original assignee: Shenzhen Taiyong Electric Co ltd
Current assignee: Shenzhen Taiyong Electric Co ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2020-08-25
Anticipated expiration: 2030-03-31

Abstract

The utility model discloses an insertion type miniature circuit breaker, which comprises a shell, a button and locking mechanism, a short-circuit protection mechanism, an arc extinguish chamber, a wire outlet end, a signal end, an overload protection mechanism, an operating mechanism and a wire inlet end, wherein the button and the locking mechanism are arranged in the shell and are connected with the operating mechanism; the short-circuit protection mechanism is connected with the wire outlet end through copper flexible connection and is arranged in the shell; the operating mechanism is connected with the overload protection mechanism, and the overload protection mechanism is connected with the wire outlet end; the operating mechanism is contacted with the short-circuit protection mechanism through the operating button and the locking mechanism, so that the connection between the incoming line end and the outgoing line end is realized; the signal end is connected with a bimetallic support in the overload protection mechanism, so that the equipotential is formed between the signal end and the moving contact, and the function of detecting a combined signal and a separated signal is realized. Adopt bayonet miniature circuit breaker, the narrow and small space of specially adapted can realize the high density distribution, can improve the installation effectiveness, has convenient and safe and reliable in the use and change process.

Description

Plug-in type miniature circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to bayonet miniature circuit breaker.

Background

The circuit breaker can be used for switching on, carrying and breaking current under normal circuit conditions, and can also be used for switching on, carrying and breaking current for a certain time under specified abnormal conditions, so that the circuit breaker is widely applied to a power distribution system.

The installation mode of the circuit breaker is mainly divided into three types: the circuit breaker is respectively fixed, drawer type and plug-in type, and has the functions of cutting off and switching on a load circuit and cutting off a fault circuit, so that the accident is prevented from being enlarged, and the safe operation is ensured. With the continuous development and upgrade of power distribution systems, the fixed circuit breakers are not convenient to install, replace and maintain. Especially to the biggest miniature circuit breaker of use amount, bayonet miniature circuit breaker selects less on the market at present, and realizes its installation through the annex base mostly, because occupation space is great, so need set up a bayonet miniature circuit breaker who is applied to narrow and small space, will improve the convenience of distribution density and installation, change and maintenance by a wide margin.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to the problem that exists among the background art, provide a simple structure, operation and convenient assembling's circuit breaker can improve distribution density and miniature circuit breaker installation effectiveness by a wide margin, still has the convenience of change and maintenance, specifically speaking is a bayonet miniature circuit breaker.

For solving the technical problem, the utility model discloses the technical scheme who adopts does: a plug-in type miniature circuit breaker comprises a shell, a button and locking mechanism, a short-circuit protection mechanism, an arc extinguish chamber, a wire outlet end, a signal end, an overload protection mechanism, an operating mechanism and a wire inlet end, wherein the button and the locking mechanism are arranged in the shell and are connected with the operating mechanism; the short-circuit protection mechanism is connected with the wire outlet end through copper flexible connection and is arranged in the shell; the operating mechanism is connected with the overload protection mechanism, and the overload protection mechanism is connected with the wire outlet end; the operating mechanism comprises a contact support, a lock catch and a moving contact, wherein the lock catch and the moving contact are both arranged on the contact support, and the wire inlet end comprises a spring piece and a wiring board; the wiring board is clamped in the spring sheet and is mounted in the shell together; the overload protection mechanism comprises a first annealed copper wire, a bimetallic strip, a pull rod, a second annealed copper wire and a bimetallic bracket; one end of the first soft copper wire is connected with the wiring board, and the other end of the first soft copper wire is connected with the bimetallic strip; the bimetallic strip is fixed on the bimetallic bracket; one end of the second annealed copper wire is connected with the bimetallic strip, and the other end of the second annealed copper wire is connected with the moving contact; one end of the pull rod is limited by the groove on the bimetallic strip, and the other end of the pull rod extends into the groove of the lock catch; the operating button and the locking mechanism are operated to make the operating button translate and drive the operating mechanism, so that a moving contact in the operating mechanism is contacted with the short-circuit protection mechanism, and the incoming line end is communicated with the outgoing line end; the signal end is connected with a bimetallic support in the overload protection mechanism, so that equipotential is formed between the signal end and the moving contact, and the function of detecting a combined signal and a separated signal is realized.

Further, the utility model discloses an inserted miniature circuit breaker, wherein button and locking mechanical system are including button, buckle, reset spring and indicator, be equipped with U type groove and cylinder structure in the button, and be equipped with the structure that has the boss on the button, the boss with can hold the indicator, be equipped with the face of cylinder on the indicator, be equipped with the restriction trench corresponding with the face of cylinder on the shell, the button is installed in the shell, and only has a translation degree of freedom through the shell spacing, through the linkage of U type groove and operating device; the indicating piece is arranged in the button through a boss on the button and can rotate around the boss, and a cylindrical surface on the indicating piece is inserted into a corresponding limiting slot position in the shell; the buckle is limited by the shell and has only one extended translational freedom degree, and is matched with the cylindrical structure on the button to realize the functions of mistakenly closing and mistakenly separating; one end of the reset spring is lapped on the extending structure of the shell, and the other end of the reset spring is lapped on the buckle.

Further, the utility model discloses a plug-in miniature circuit breaker, wherein short circuit protection mechanism includes axle, support, yoke, iron core, coil, annealed copper wire, plug, run-on arc piece, silver point, static contact and armature, connect through annealed copper wire between coil and the plug, run-on arc piece passes through silver point welding on the static contact, the static contact welds at the other end of coil; the coil penetrates through the iron core, the magnetic yoke, the iron core and the support are fixed into an integral structure through riveting, the armature penetrates into the support through a shaft, and the armature can rotate around the shaft; the operating button and the locking mechanism are operated to make the operating button translate and drive the operating mechanism, so that a moving contact in the operating mechanism is contacted with a silver point in the short-circuit protection mechanism, and the incoming line end is communicated with the outgoing line end; when a large short-circuit current passes through the coil, the armature can rotate around the shaft under the magnetic field generated by the coil, and the armature can flap the lock catch in the rotating process, so that a brake separating cut-off loop is formed.

Further, a bayonet miniature circuit breaker, wherein the explosion chamber is installed in the shell, and is located between run-on piece and the two golden supports, through the explosion chamber is favorable to accelerating the transfer of electric arc to utilize the extinguishing of metal grid piece arc extinguishing principle electric arc with higher speed, thereby protection circuit breaker and power consumption circuit and equipment.

Furthermore, the utility model discloses a plug-in miniature circuit breaker, wherein the signal end includes diode and bayonet joint, diode one end welding is on two golden support, the other end welding is on the bayonet joint; the plug connector and the moving contact are always kept at the same potential, when the breaker is used, the moving contact is in a closing state or an opening state, the potential can change along with the change, the potential of the same plug connector also changes along with the change, and the circuit breaker state monitoring function is realized through closing and opening signal detection.

Further, a bayonet miniature circuit breaker, wherein under the effect of bimetallic strip, pull rod and hasp between operating device and the overload protection mechanism, when overcurrent passes through the bimetallic strip, the bimetallic strip then can produce bending deformation because of heat altered shape under the electric current effect, and utilizes the bending deformation pulling of bimetallic strip the pull rod removes, through the pull rod drives the hasp unblock for the circuit breaker divides absolutely, thereby reaches the circuit breaker and has the overload protection function.

Adopt a bayonet miniature circuit breaker, compare with prior art, its beneficial effect lies in: in the process of closing and opening the brake, the locking mechanism can be operated through the operating button, the locking mechanism has the advantages of simplicity in use and the like, is particularly suitable for narrow and small spaces, can realize high-density power distribution, can improve the installation efficiency, is convenient, safe and reliable in use and replacement, is low in production cost, has higher practicability, and has wide application places.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a general schematic view of the switching-off state of the present invention;

fig. 2 is an overall schematic view of the switching-on state of the utility model;

FIG. 3 is a schematic view of the installation structure of the button and the locking mechanism of the present invention;

fig. 4 is a schematic structural diagram of the short-circuit protection mechanism in the present invention;

fig. 5 is a schematic view of the installation structure of the signal terminal, the overload protection mechanism, the operating mechanism and the incoming line terminal in the present invention;

fig. 6 is a schematic view of a buckle structure in the button and locking mechanism of the present invention;

fig. 7 is a schematic view of the bimetallic bracket structure in the overload protection mechanism of the present invention.

Shown in the figure: 1-shell, 2-button and locking mechanism, 201-button, 201 a-U-shaped groove, 201 b-cylindrical structure, 202-buckle, 202 a-extension, 203-reset spring, 204-indicator, 204 a-cylindrical surface, 3-shell, 301-shaft, 302-bracket, 303-magnetic yoke, 304-iron core, 305-coil, 306-soft copper wire, 307-plug, 308-arc-leading piece, 309-silver point, 310-static contact, 311-armature, 4-arc-extinguishing chamber, 5-outlet end, 6-signal end, 601-diode, 602-plug, 7-overload protection mechanism, 701-first soft copper wire, 702-bimetallic strip, 704-pull rod, 703-copper wire-second soft copper wire, 703, 705-double-gold support, 8-operating mechanism, 801-contact support, 802-lock catch, 803-moving contact, 9-wire inlet end, 901-spring piece and 902-wiring board.

Detailed Description

To further illustrate the concept of the present invention, the following detailed description will be made with reference to the accompanying drawings:

as shown in fig. 1 to 7, the small plug-in circuit breaker of the present invention comprises a housing 1, a button and locking mechanism 2, a short-circuit protection mechanism 3, an arc extinguish chamber 4, a wire outlet 5, a signal terminal 6, an overload protection mechanism 7, an operating mechanism 8 and a wire inlet terminal 9, wherein the button and locking mechanism 2 is installed in the housing 1 and connected with the operating mechanism 8; the short-circuit protection mechanism 3 is connected with the wire outlet end 5 through copper flexible connection and is arranged in the shell 1; the operating mechanism 8 is connected with the overload protection mechanism 7, and the overload protection mechanism 7 is connected with the wire outlet end 5; the operating mechanism 8 comprises a contact support 801, a lock 802 and a moving contact 803, wherein the lock 802 and the moving contact 803 are both arranged on the contact support 801, and the wire inlet end 9 comprises a spring piece 901 and a wiring board 902; the wiring board 902 is clamped into the spring piece 901 and is installed in the shell 1 together; the overload protection mechanism 7 comprises a first annealed copper wire 701, a bimetallic strip 702, a pull rod 703, a second annealed copper wire 704 and a bimetallic support 705; one end of the first annealed copper wire 701 is connected with the wiring board 902, and the other end is connected with the bimetallic strip 702; the bimetallic strip 702 is fixed on a bimetallic bracket 705; one end of the second annealed copper wire 704 is connected to the bimetallic strip 702, and the other end is connected to the moving contact 803; one end of the pull rod 703 is limited by a groove on the bimetallic strip 702, and the other end of the pull rod extends into the groove of the lock catch 802; the operating button and the locking mechanism 2 are operated to make the operating mechanism 8 be driven to move horizontally, so that a moving contact 803 in the operating mechanism 8 is contacted with the short-circuit protection mechanism 3, and the incoming line end 9 is communicated with the outgoing line end 5; the signal terminal 6 is connected with a bimetallic support 705 in the overload protection mechanism 7, so that an equipotential is formed between the signal terminal and the moving contact 803, and a combined signal and split signal detection function is realized.

Further, the utility model discloses a plug-in miniature circuit breaker, wherein button and locking mechanical system 2 is including button 201, buckle 202, reset spring 203 and indicator 204, be equipped with U type groove 201a and cylinder structure 201b in the button 201, and be equipped with the structure that has the boss on the button 201, the boss with can hold indicator 204, be equipped with cylinder surface 204a on indicator 204, be equipped with the restriction trench corresponding with cylinder surface 204a on shell 1, button 201 installs in shell 1, and only has a translation degree of freedom through shell 1 spacing, through U type groove 201a with operating device 8 linkage; the indicator 204 is arranged in the button 201 through a boss on the button 201 and can rotate around the boss, and a cylindrical surface 204a on the indicator 204 is inserted into a corresponding limiting slot position in the shell 1; the buckle 202 is limited by the shell 1 and has only one translational freedom degree of an extending edge 202a, and is matched with the cylindrical structure 201b on the button 201 to realize the functions of mistakenly closing and mistakenly separating; the return spring 203 has one end thereof lapped on the protruding structure of the housing 1 and the other end thereof lapped on the buckle 202.

Further, the utility model discloses a plug-in miniature circuit breaker, wherein short-circuit protection mechanism 3 includes axle 301, support 302, yoke 303, iron core 304, coil 305, annealed copper 306, plug 307, striking piece 308, silver point 309, static contact 310 and armature 311, connect through annealed copper 306 between coil 305 and the plug 307, striking piece 308 welds on static contact 310 through silver point 309, static contact 310 welds the other end at coil 305; a coil 305 penetrates through an iron core 304, the magnetic yoke 303, the iron core 304 and a bracket 302 are fixed into an integral structure through riveting, the armature 311 penetrates through the bracket 302 through a shaft 301, and the armature 311 can rotate around the shaft 301; the operating button and the locking mechanism 2 are operated to make the operating mechanism 8 move horizontally, so that a moving contact 803 in the operating mechanism 8 is contacted with a silver point 309 in the short-circuit protection mechanism 3, and the incoming line end 9 is communicated with the outgoing line end 5; when a large short-circuit current passes through the coil 305, the armature 311 will rotate around the shaft 301 under the magnetic field generated by the coil 305, and during the rotation process, the armature 311 will flap the lock catch 802 to form a brake-separating and disconnecting loop, so that the brake-separating and disconnecting function is realized by the short-circuit protection mechanism 3.

Further, a bayonet miniature circuit breaker, wherein explosion chamber 4 installs in shell 1, and is located between arc striking piece 308 and two golden supports 705, through explosion chamber 4 is favorable to accelerating the transfer of electric arc to utilize the extinguishing of metal grid piece arc extinguishing principle accelerating electric arc, thereby protection circuit breaker and power consumption circuit and equipment.

Further, the utility model discloses a plug-in type miniature circuit breaker, wherein signal terminal 6 includes diode 601 and bayonet joint 602, diode 601 one end welds on two golden support 705, and the other end welds on bayonet joint 602; the plug-in connector 602 and the moving contact 803 are always kept at the same potential, when the breaker is in use, the moving contact 803 is in a closing state or an opening state, the potential changes accordingly, the potential of the same plug-in connector 602 changes along with the change, and the circuit breaker state monitoring function is realized through the closing and opening signal detection.

Further, a bayonet miniature circuit breaker, wherein under the effect of bimetallic strip 702, pull rod 703 and hasp 802 between operating device 8 and overload protection mechanism 7, when overload current passes through bimetallic strip 702, bimetallic strip 702 then can produce bending deformation because of the heat altered shape under the electric current effect, and utilize bimetallic strip 702's bending deformation pulling pull rod 703 removes, through pull rod 703 drives the unblock of hasp 802 for the circuit breaker divides absolutely, thereby reaches the circuit breaker and has the overload protection function.

In the practical application process, when the plug-in type miniature circuit breaker is used, the circuit breaker can be directly pushed into the cabinet body during installation, and the wire inlet end 9 comprises a spring piece 901 and a wiring board 902; the wiring board 902 is clamped into the spring pieces 901 and is mounted in the shell 1 together, when the cable connector is used by a user, the cable can be directly inserted into the spring pieces 901 and fully contacted with the wiring board 902 under the clamping force of the spring pieces 901, so that the original screw wiring mode is replaced, and the cable connector is convenient to wire, safe and reliable; due to the overload protection mechanism 7, when overload current passes through the bimetallic strip 702, the bimetallic strip 702 generates bending deformation under the action of the current due to thermal deformation, the pull rod 703 is pulled to move by the bending deformation of the bimetallic strip 702, and the pull rod 703 drives the lock catch 802 to unlock, so that the breaker is disconnected, and the breaker has an overload protection function; in the process of switching on and switching off, the circuit breaker can not be switched on when not inserted in place by operating the button and the locking mechanism 2 and by the built-in locking function; and under the closing state, the breaker can be pulled continuously after being opened only by pulling the handle, so that the breaker is pulled out of the cabinet body, and the switch has the advantages of simplicity in use and the like.

Therefore, the plug-in miniature circuit breaker is applicable to narrow spaces, can realize high-density power distribution, can improve the installation efficiency, is convenient, safe and reliable in the use and replacement process, low in production cost, high in practicability and wide in application places.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and to those skilled in the art, the present invention can be variously modified and changed, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A plug-in miniature circuit breaker characterized in that: the device comprises a shell (1), a button and locking mechanism (2), a short-circuit protection mechanism (3), an arc extinguish chamber (4), a wire outlet end (5), a signal end (6), an overload protection mechanism (7), an operating mechanism (8) and a wire inlet end (9), wherein the button and locking mechanism (2) is arranged in the shell (1) and is connected with the operating mechanism (8); the short-circuit protection mechanism (3) is connected with the wire outlet end (5) through copper flexible connection and is arranged in the shell (1); the operating mechanism (8) is connected with the overload protection mechanism (7), and the overload protection mechanism (7) is connected with the wire outlet end (5); the operating mechanism (8) comprises a contact support (801), a lock catch (802) and a moving contact (803), the lock catch (802) and the moving contact (803) are both arranged on the contact support (801), and the wire inlet end (9) comprises a spring piece (901) and a wiring board (902); the wiring board (902) is clamped into the spring piece (901) and is installed in the shell (1) together; the overload protection mechanism (7) comprises a first annealed copper wire (701), a bimetallic strip (702), a pull rod (703), a second annealed copper wire (704) and a bimetallic bracket (705); one end of the first soft copper wire (701) is connected with the wiring board (902), and the other end of the first soft copper wire is connected with the bimetallic strip (702); the bimetallic strip (702) is fixed on the bimetallic bracket (705); one end of the second annealed copper wire (704) is connected with the bimetallic strip (702), and the other end of the second annealed copper wire is connected with the movable contact (803); one end of the pull rod (703) is limited by a groove on the bimetallic strip (702), and the other end of the pull rod extends into the groove of the lock catch (802); the operating button and the locking mechanism (2) are operated to make the operating button translate and drive the operating mechanism (8), so that a moving contact (803) in the operating mechanism (8) is contacted with the short-circuit protection mechanism (3), and the connection between a wire inlet end (9) and a wire outlet end (5) is realized; the signal end (6) is connected with a bimetallic support (705) in the overload protection mechanism (7), so that equipotential is formed between the signal end and the moving contact (803), and the function of signal combination and separation detection is realized.

2. A plug-in miniature circuit breaker according to claim 1, characterized in that: the button and locking mechanism (2) comprises a button (201), a buckle (202), a reset spring (203) and an indicating piece (204), a U-shaped groove (201a) and a cylindrical structure (201b) are arranged in the button (201), a structure with a boss is arranged on the button (201), the boss can accommodate the indicating piece (204), a cylindrical surface (204a) is arranged on the indicating piece (204), a limiting groove corresponding to the cylindrical surface (204a) is arranged on the shell (1), the button (201) is arranged in the shell (1), is limited by the shell (1) to have only one translational degree of freedom, and is linked with the operating mechanism (8) through the U-shaped groove (201 a); the indicating piece (204) is arranged in the button (201) through a boss on the button (201) and can rotate around the boss, and a cylindrical surface (204a) on the indicating piece (204) is inserted into a corresponding limiting slot position in the shell (1); the buckle (202) is limited by the shell (1) and has only one translational freedom degree of an extending edge (202a), and is matched with a cylindrical structure (201b) on the button (201) to realize the functions of mistakenly closing and mistakenly separating; one end of the return spring (203) is lapped on the extending structure of the shell (1), and the other end is lapped on the buckle (202).

3. A plug-in miniature circuit breaker according to claim 1, characterized in that: the short-circuit protection mechanism (3) comprises a shaft (301), a bracket (302), a magnet yoke (303), an iron core (304), a coil (305), a soft copper wire (306), a plug (307), an arc striking sheet (308), a silver point (309), a static contact (310) and an armature (311), wherein the coil (305) and the plug (307) are connected through the soft copper wire (306), the arc striking sheet (308) is welded on the static contact (310) through the silver point (309), and the static contact (310) is welded at the other end of the coil (305); a coil (305) penetrates through an iron core (304), the magnetic yoke (303), the iron core (304) and the support (302) are fixed into an integral structure through riveting, the armature (311) penetrates into the support (302) through a shaft (301), and the armature (311) can rotate around the shaft (301); the operating button and the locking mechanism (2) are operated to make the operating button translate and drive the operating mechanism (8), so that a moving contact (803) in the operating mechanism (8) is contacted with a silver point (309) in the short-circuit protection mechanism (3), and the incoming line end (9) is communicated with the outgoing line end (5); when a large short-circuit current passes through the coil (305), the armature (311) rotates around the shaft (301) under the magnetic field generated by the coil (305), and the armature (311) beats the lock catch (802) during the rotation process, so that a brake-separating cut-off loop is formed.

4. A plug-in miniature circuit breaker according to claim 3, characterized in that: arc extinguishing chamber (4) are installed in shell (1), and are located between arc ignition piece (308) and two golden support (705), through arc extinguishing chamber (4) are favorable to accelerating the transfer of electric arc to utilize the extinguishing of metal grid piece arc extinguishing principle acceleration electric arc, thereby protection circuit breaker and power consumption circuit and equipment.

5. A plug-in miniature circuit breaker according to claim 1, characterized in that: the signal end (6) comprises a diode (601) and a plug connector (602), one end of the diode (601) is welded on the double-gold bracket (705), and the other end of the diode (601) is welded on the plug connector (602); the plug connector (602) and the moving contact (803) are always kept at the same potential, when the breaker is used, the moving contact (803) is in a closing state or an opening state, the potential can be changed along with the change, and the potential of the same plug connector (602) is detected through a closing signal and an opening signal along with the change, so that the state monitoring function of the breaker is realized.

6. A plug-in miniature circuit breaker according to claim 1, characterized in that: under the action of the bimetallic strip (702), the pull rod (703) and the lock catch (802) between the operating mechanism (8) and the overload protection mechanism (7), when overload current passes through the bimetallic strip (702), the bimetallic strip (702) can generate bending deformation under the action of the current due to thermal deformation, the pull rod (703) is pulled to move by utilizing the bending deformation of the bimetallic strip (702), and the lock catch (802) is driven to unlock through the pull rod (703), so that the breaker is disconnected, and the overload protection function of the breaker is achieved.