CN218482174U - Circuit breaker - Google Patents

Abstract

The utility model relates to a circuit breaker, including moulding the shell, two golden subassemblies and circuit board, be equipped with terminal block and explosion chamber in moulding the shell, it is protruding to have the separation at the explosion chamber edge, two golden subassemblies are arranged along the protruding installation of separation, the run-on plate of two golden subassemblies stretches into in the explosion chamber, bimetallic strip is located the explosion chamber outside, bimetallic strip and run-on plate are connected through the run-on connecting plate, mould the shell including the lid shell of the mutual lock of two lamellas and press from both sides the well lid of establishing between two lamella lid shells, well lid one side extends the protruding outside edge of separation and pastes and leans on in the protruding edge of separation and the protruding location fit of separation, well lid thickness direction both sides form upper cavity and lower floor's cavity respectively, bimetallic strip and run-on connecting plate arrange in upper cavity, the circuit board is located lower floor's cavity, the cavity of lower floor extends to the protruding border of separation, and well lid has the bimetallic strip mounted position that staggers, the fretwork of intercommunication lower floor's cavity and upper cavity, it gets into upper cavity to pass lower floor's cavity to supply circuit board upper portion component. Has the advantages of compact structure and small volume.

Description

Circuit breaker

Technical Field

The utility model relates to a circuit breaker.

Background

The shell of the existing circuit breaker adopts an assembly structure of upper and lower two-piece cover shells buckled with each other, the circuit board is staggered in the circuit breaker to avoid the influence of a bimetallic assembly on the circuit board, and the installation space required in the shell of the circuit breaker is increased, so that the whole size of the circuit breaker is large, and the miniaturization design of the circuit breaker is not facilitated.

Disclosure of Invention

The utility model discloses the invention purpose: for overcoming the defect that prior art exists, the utility model provides a compact structure and small circuit breaker.

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

the utility model provides a circuit breaker, includes and moulds shell, two golden subassemblies and circuit board is equipped with the explosion chamber that is located the binding post seat of both sides and middle part in moulding the shell, and it is protruding to have the separation at the explosion chamber edge, and two golden subassemblies are arranged along the protruding installation of separation, and the striking plate of two golden subassemblies stretches into in the arc extinguishing chamber, and the bimetallic strip of two golden subassemblies is located the arc extinguishing chamber outside, and bimetallic strip and striking plate are connected through the striking connecting plate, mould shell includes the lid shell of the mutual lock of two lamellas, its characterized in that: the plastic shell is characterized in that the plastic shell further comprises a middle cover clamped between two cover shells, one side of the middle cover extends to the outer edge of the blocking protrusion and is attached to the protruding edge of the blocking protrusion and matched with the protruding locating of the blocking protrusion, an upper cavity and a lower cavity are formed in the two sides of the thickness direction of the middle cover respectively, the bimetallic strip and the arc striking connecting plate are arranged in the upper cavity, the circuit board is located in the lower cavity, the lower cavity extends to the protruding edge of the blocking protrusion, the middle cover is provided with a hollow part which is staggered in installation position of the bimetallic strip and communicated with the lower cavity and the upper cavity, and the hollow part of the circuit board penetrates through the lower cavity and enters the upper cavity.

Through adopting above-mentioned technical scheme, lid in increasing between two lamella lid shells, well lid plays the separation effect, thereby make the mounted position of circuit board extendible to the protruding border of separation, circuit board mounted position can partly overlap at bimetallic strip mounted position promptly, cover still in addition in the local fretwork design of staggering bimetallic strip mounted position, so that the space that the upper cavity of circuit board upper portion more bellied components and parts can utilize the upper cavity is installed, thereby make circuit board rational arrangement, make inside cavity obtain make full use of, the compact structure of circuit breaker, the miniaturized design of the circuit breaker of being convenient for.

Preferably, close on the wiring terminal seat of well lid is including the terminal base of shaping on the lid shell to and the middle pedestal of shaping on covering in, middle pedestal all is formed with half groove of terminal location along well lid thickness direction both sides, and two lamella lid shells upper end terminal base encloses into the terminal vestibule with two half groove one-to-ones locks of terminal location, is equipped with the location shrinkage pool on the terminal base, is equipped with the location bump of pegging graft the location with the location shrinkage pool on middle pedestal. Under this structural design, well lid extends to the binding post position and forms corresponding location structure for the cooperation of well lid and lid shell is more firm reliable, and utilizes the connecting portion that terminal block position provided well lid and lid shell location installation, and the saving space that can be better, terminal block part shaping is covered in, and the processing of being convenient for, the binding post's of being convenient for installation simultaneously.

Preferably, be equipped with respectively on the middle pedestal of well lid with the draw-in groove of two lamella lid shell buckles, be equipped with the joint arch in the draw-in groove, be equipped with on the lid shell insert in the draw-in groove and with the protruding buckle complex dop of joint, well cover respectively in the draw-in groove staggered arrangement of two lamella lid shell buckles, the draw-in groove extends to have and supplies the instrument to stretch into the dismantlement notch that the draw-in groove pried the dop. Under this structural design, well lid simultaneously with two lid shell snap-fit, the installation of well lid is firm reliable, the design of dismantling the notch can conveniently mould the dismantlement of shell, the required size of buckle and dismantlement notch design can be guaranteed to the draw-in groove dislocation arrangement.

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

Drawings

Fig. 1 is a schematic structural diagram of the circuit breaker of the present invention;

fig. 2 is an exploded view of the circuit breaker of the present invention.

Detailed Description

Referring to fig. 1 and 2, the present invention discloses a circuit breaker, the improvement of which only relates to the bimetal component and the circuit board mounting and matching structure, so as to explain the technical innovation point of the present invention more simply and clearly, and omit other irrelevant structures which can be known in the prior art by those skilled in the art. The circuit breaker comprises a plastic shell 1, a bimetal component 2 and a circuit board 3, wherein the plastic shell 1 is internally provided with wiring terminal seats 11 positioned at two sides and an arc extinguish chamber 12 at the middle part, the edge of the arc extinguish chamber 12 is provided with a blocking bulge 121, the double-metal component 2 is arranged along the blocking bulge 121, the arc striking plate 21 of the double-metal component 2 extends into the arc extinguish chamber 12, the bimetallic strip 22 of the double-metal component 2 is positioned at the outer side of the arc extinguish chamber 12, the bimetallic strip 22 and the arc striking plate 21 are connected through an arc striking connecting plate 23, the plastic shell 1 comprises a cover shell 1-1 (for convenience of illustration of a middle cover, only one cover shell is shown in the figure) with two mutually buckled flaps, the plastic shell 1 further comprises a middle cover 1-2 clamped between the two cover shells 1-1, one side of the middle cover 1-2 extends to the outer edge of the blocking bulge 121 and is attached to the edge of the blocking bulge 121 to be in positioning fit with the blocking bulge 121, an upper-layer cavity a and a lower-layer cavity b are respectively formed on two sides of the thickness direction (the direction of an X axis in the figure, namely the mutual buckling direction of the two cover shells) of the middle cover 1-2, the bimetallic strip 22 and the striking connecting plate 23 are arranged in the upper-layer cavity a, the bulges 1-21 are arranged in the upper-layer cavity a to position the bimetallic strip 22 and the striking connecting plate 23, the circuit board 3 is positioned in the lower-layer cavity b, and the lower-layer cavity b extends to the edge of the blocking bulge 121, and the middle cover 1-2 is provided with a hollow part 1-20 which is staggered with the installation position of the bimetallic strip 22 and is communicated with the lower layer cavity b and the upper layer cavity a, the hollow parts 1-20 are used for leading partial elements on the circuit board 3 to pass through the lower layer cavity b and enter the upper layer cavity a, the circuit board is a conventional part in the field, therefore, the electronic components thereon are well known to those skilled in the art, and detailed descriptions thereof will be omitted. The middle cover 1-2 is additionally arranged between the two cover shells 11, the middle cover 1-2 plays a role in separation, so that the mounting position of the circuit board can extend to the edge of a separation bulge, namely the mounting position of the circuit board can be partially overlapped at the mounting position of the bimetallic strip, and in addition, the middle cover 1-2 is also designed in a hollow-out mode 1-20 at the place where the mounting position of the bimetallic strip is staggered, so that components and parts with more bulges on the upper part of the circuit board can be mounted by utilizing the space of an upper cavity, the circuit board is reasonably arranged, the internal cavity of the circuit breaker is fully utilized, the structure of the circuit breaker is compact, and the miniaturization design of the circuit breaker is facilitated.

The wiring terminal base adjacent to the middle cover 1-2 comprises a terminal base 1-11 formed on a cover shell 1-1 and a middle base 1-22 formed on the middle cover 1-2, wherein terminal positioning half grooves 1-221 are formed on two sides of the middle base 1-22 in the thickness direction of the middle cover 1-2, the terminal base 1-11 and the two terminal positioning half grooves 1-221 are correspondingly buckled one by one on the two-piece cover shell 1-1 to enclose a terminal hole cavity, positioning concave holes 1-111 are formed in the terminal base 1-11, and positioning protrusions 1-222 inserted and positioned with the positioning concave holes 1-111 are arranged on the middle base 1-22. The middle cover extends to the wiring terminal position and forms a corresponding positioning structure, so that the matching of the middle cover and the cover shell is firmer and more reliable, the connecting part for positioning and installing the middle cover and the cover shell is provided by utilizing the wiring terminal seat position, the space can be better saved, the wiring terminal seat part is formed on the middle cover, the processing is convenient, and meanwhile, the installation of the wiring terminal is convenient.

The middle seat body 1-22 of the middle cover is provided with a clamping groove 1-223 which is respectively buckled with the two-piece cover shell 1-1, a clamping bulge 1-224 is arranged in the clamping groove 1-223, the cover shell 1-1 is provided with a clamping head 1-12 which is inserted into the clamping groove 1-223 and is buckled and matched with the clamping bulge 1-224, the middle cover 1-2 is respectively arranged in a staggered mode on the clamping groove 1-223 of the two-piece cover shell 1-1, and a disassembling notch 1-2231 for a tool to extend into the clamping groove 1-223 to pry the clamping head 1-12 is extended from the clamping groove 1-223. Well lid simultaneously with two lid shell snap-fit, the installation of well lid is firm reliable, the design of dismantling the notch can conveniently mould the dismantlement of shell, draw-in groove staggered arrangement can provide sufficient shaping position, can guarantee the required size of buckle to and can extend at the draw-in groove side and form and dismantle the notch.

Claims (3)

1. The utility model provides a circuit breaker, is equipped with the explosion chamber that is located the terminal block of both sides and middle part in moulding the shell including moulding the shell, two golden subassemblies and circuit board, and it is protruding to have the separation at the explosion chamber edge, and two golden subassemblies are arranged along the protruding installation of separation, and in two golden subassemblies's striking plate stretched into the arc extinguishing chamber, two golden subassemblies's bimetallic strip was located the arc extinguishing chamber outside, and bimetallic strip and striking plate were connected through the striking connecting plate, mould the shell that covers including the mutual lock of two lamellas, its characterized in that: mould the shell and still including pressing from both sides the well lid of establishing between two lamella lid shells, well lid one side extends to the protruding outside edge of separation and pastes and lean on in the protruding edge of separation and the protruding location fit of separation, well lid thickness direction both sides form upper cavity and lower floor's cavity respectively, bimetallic strip and striking connecting plate are arranged in upper cavity, the circuit board is located lower floor's cavity, lower floor's cavity extends to the protruding border of separation, and well lid has the bimetallic strip mounted position that staggers, the fretwork of intercommunication lower floor's cavity and upper cavity, this fretwork is supplied partial component to pass lower floor's cavity and gets into upper cavity on the circuit board.

2. The circuit breaker of claim 1, wherein: close on the wiring terminal seat of well lid is including the terminal base of shaping on covering the shell to and the middle pedestal of shaping on covering in, middle pedestal is covered thickness direction both sides along well and is all formed with half groove of terminal location, and two lamella cover shells upper end terminal base encloses into the terminal vestibule with two half groove one-to-ones locks of terminal location, is equipped with the location shrinkage pool on the terminal base, is equipped with the location bump of pegging graft the location with the location shrinkage pool on the pedestal in the middle of.

3. The circuit breaker of claim 2, wherein: the middle base body of the middle cover is provided with clamping grooves which are respectively buckled with the two cover shells, a clamping protrusion is arranged in each clamping groove, clamping heads which are inserted into the clamping grooves and matched with the clamping protrusion in a buckling mode are arranged on the cover shells, the middle cover is respectively arranged in the clamping grooves of the two cover shell buckles in a staggered mode, and the clamping grooves are extended to form detaching notches for tools to stretch into the clamping grooves to pry the clamping heads.

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