CN204303707U - Breaker - Google Patents

Abstract

The utility model provides a kind of breaker, even if the terminal be connected with electric wire of this breaker is adopting with in prior art during same press mode, also can guarantees assembling property, and can guarantee the degree of being adjacent to screw mode peer-level.This terminal is L-shaped, between the electric wire that moving contact or static contact are connected with corresponding breaker, and be fixed by press mode, the bend of this terminal is provided with jut, this jut is extended out by the surface co-planar be connected with said wires, the extended surface of above-mentioned projection and the top of protuberance are arranged with coming close to or in contact with, and the interface that this protuberance is docked by cover portion and said base is outstanding to above-mentioned base side.

Description

Breaker

Technical field

The utility model relates to the breaker (Circuit Breaker) of wiring breaker and electric leakage breaker etc., specifically, relates to a kind of technology improved the terminal for being connected with external cable.

Background technology

Such as, in order to prevent because of excessive and cause this electric wire and loading robotics to be burnt to the electric current of the electric wire of loading robotics from transformer (Transfer), known method is at the midway of arranged corresponding electric wire configuration breaker.This breaker has terminal, the circuit that the number of poles of this terminal is formed with by electric wire and single-phase, three-phase or three-phase and four-line etc. are corresponding, by this terminal, this breaker can with corresponding electric wire (from breaker, corresponding electric wire is " external cable ", hereinafter referred to as " electric wire ") connect.

The method of attachment of known breaker and electric wire such as has fast connecting terminal mode and insertion (Plug-in) mode etc., speed connecting terminal mode namely, terminal is configured to leaf spring, the contact of terminal and electric wire is kept with this elastic force, inserted mode namely, electric wire is configured to the conductor being called as bus (bus bar), breaker is connected with this conductor.In addition, when needing current-carrying capacity to a certain degree, or to saving the engineering time and the when of having no special requirements, as under type is widely adopted, that is, pad (washer) or pressure line terminal by being arranged on the screw (screw) at terminal place are connected with the electric wire or electric wire itself being provided with crimp type terminal.

But, when being provided with multiple above-mentioned breaker in point electric cabinet etc., because installation space is to the restriction of this point of electric cabinet, making score electricity, cabinet is autologous needs miniaturization (downsizing), and then making built-in breaker also need miniaturization, each producer (maker) is all for realizing this miniaturization and effort.In addition, in order to overcurrent detecting device and switching mechanism (i.e. the mechanism of above-mentioned " preventing electric wire and loading robotics from being burnt "), arc-control device (for extinguishing the electric arc (arc) produced along with circuit breaker) etc. are installed in corresponding breaker, and improve the performance of breaker simultaneously, be also necessary to pay close attention to the parts directly not affecting breaker performance and improve.

Thus, known in the prior art, by the method using configuring above-mentioned terminal on the casing as breaker gabarit, press mode is changed to by screw mode of the prior art, the configuration space needed for screw mode can be saved, when being used for improving performance or maintaining equal performance in this space saved, the miniaturization (for example, referring to patent document 1) of this gabarit can be reached.

No. 2000-21284, [patent document 1] Japanese Laid-Open Patent Publication invention (the 3rd page of right hurdle the 28th row ~ 49 row)

But due to this terminal object that to be construction of cable run operator pay close attention to when connecting electric wire, thus the reduction of the degree of being adjacent to of reduction, i.e. itself and the casing of this terminal performance is not allowed to.But, although in order to obtain the degree of being adjacent to equal with above-mentioned screw mode, and take and longer press-in holding section is such as set grades measure, but, be only that the pushing force being pressed into casing increases, assembling property just may be caused to worsen, casing sometimes also can be caused because of press-in action damaged.

Utility model content

In view of the foregoing, the purpose of this utility model is to provide a kind of breaker, the terminal be connected with electric wire that this breaker has, even if when adopting the press mode identical with prior art, also while guaranteeing assembling property, the degree of being adjacent to screw mode peer-level can be had.

Breaker involved by the utility model has casing, open-close mechanism section, transverse arm (crossbar, moving contact supporting arm), moving contact, static contact, arc-control device and binding post.Wherein, casing is made up of the cover portion (cover) formed with insulator and pedestal (base); Open-close mechanism section is configured between the frame plate (frame plate) of relative configuration, has the operating grip (handle) stretched out by cover portion; Transverse arm and open-close mechanism section link and rotate; Moving contact and transverse arm link, and it at least has movable contact in one end; Static contact has stationary contact, and this stationary contact can contact with described movable contact and be separated, the two contact be separated and can be switched; Arc-control device is for cutting off the electric arc produced between described stationary contact and described movable contact; Binding post is L-shaped, between static contact and the electric wire connected with corresponding breaker, or between moving contact and the electric wire connected with corresponding breaker, is fixed by being pressed into pedestal.Jut is provided with at the bend of the binding post of above-mentioned L-shaped, this jut has by the extended surface that extends out of the coplanar ground of the table be connected with electric wire, the extended surface of this jut and the top of protuberance come close to or in contact with, and the interface that described protuberance is docked by cover portion and pedestal is outstanding to pedestal side.

In the utility model, Ke Yiwei, the surface formed after the surface curvature be connected with electric wire of described binding post and the top of above-mentioned jut coplanar.

In addition, above-mentioned protuberance can be integrally formed with above-mentioned cover portion.

As mentioned above, adopt the utility model, a kind of breaker of stay in grade as follows can be provided, namely, not only assembling property is excellent, cost is lower for it, and when electric wire connects with the terminal of corresponding breaker by construction of cable run operator, this terminal can not produce movement.

Accompanying drawing explanation

Fig. 1 is the stereoscopic figure of the breaker involved by embodiment 1 of the present utility model.

Fig. 2 is the stereogram of breaker before mounting cup portion in Fig. 1.

Fig. 3 is the sectional view along A-A line cutting in Fig. 1.

Fig. 4 is the enlarged drawing of the binding post in Fig. 1.

Fig. 5 is the stereogram being equivalent to Fig. 2 in variation.

[description of reference numerals]

1: cover portion; 1b: protuberance; 2: pedestal; 3: operating grip; 4: mains side binding post; 5: load side lug terminal; 5b: first surface; 5c: second surface; 5f: jut; 6: stationary contact; 7: static contact; 8: movable contact; 10: transverse arm; 11: moving contact; 51: open-close mechanism section; 52: arc-control device; 100: breaker.

Detailed description of the invention

[embodiment 1]

Fig. 1 and Fig. 2 is the outline drawing of the breaker involved by embodiment of the present utility model 1 being in dropout (trip) state, and specifically, Fig. 1 is installation state, and Fig. 2 is the state before mounting cup portion.In addition, Fig. 3 is the sectional view along A-A line cutting in Fig. 1, and Fig. 4 is the outline drawing of the wire conductors as significant points.

In figs. 1 to 3; the insulation box of 3 pole breakers 101 is made up of cover portion 1 and pedestal 2; wherein; be configured with open-close mechanism section 51, arc-control device 52 and overcurrent protection 53 on the base 2; wherein; open-close mechanism section 51 has operating grip 3, and the number (in this case 3) of arc-control device 52 is corresponding with the number of poles of terminal.Operating grip 3 is protruding by the handle window 1a in cover portion 1, thus can by ON or OFF direction operation, and this is known prior art.In addition; due to arc-control device 52 and the relation of overcurrent protection 53 position; binding post 4 is the mains side binding posts be connected with power side wire (not shown); binding post 5 is the load side binding posts be connected with load side electric wire (not shown), and this is also known.In addition, when being connected with each electric wire, at the screw of screw hole 4a, 5a place belt washer etc. of each binding post 4,5, securely connect electric wire or be crimped on the crimp type terminal of electric wire top (front end).

In addition, open-close mechanism section 51, arc-control device 52 and overcurrent protection 53 also adopt known technology.Namely; static contact 7 and moving contact 11 is provided with in breaker 101; wherein; static contact 7 is extended out by mains side binding post 4 and is formed; its one end has stationary contact 6, and moving contact 11 is the parts forming open-close mechanism section 51, and it is kept by the transverse arm 10 being such as resin-molded component; and be connected with load side lug terminal 5 by moving contact supporting member 8 and overcurrent protection 53, its one end has movable contact 9.The contact of static contact 7 and moving contact 11 be separated and can be switched, especially, when the two is separated, can produce electric arc between stationary contact and movable contact, this electric arc is cut off by arc-control device 52.In addition, the separation of the two is carried out in the following way, namely; make the two be separated by the operation to OFF direction of operating grip 3, or overcurrent protection 53 produce action according to the current overload state of circuit; open-close mechanism section makes respective action, makes the two be separated.And the breaker 101 involved by present embodiment 1 is the RCCBs with known zero phase current transformer 12 and earth leakage protective device 54, thus when the leakage current of this circuit is more than setting, also carry out above-mentioned separating action.These known devices are not piths of the present utility model, and thus description is omitted.

Below, be described for as each binding post of pith of the present utility model, especially load side lug terminal 5 (hereinafter referred to as terminal 5).As shown in Figure 4, the profile of terminal 5 is roughly in alphabetical L-shaped, and electric wire or the crimp type terminal being crimped on electric wire top are close on first surface 5b, the first surface 5b i.e. bottom surface of this L-shaped, by being arranged in screw hole 5a by not shown screw fastening, electric wire is electrically connected with terminal 5.In addition, erect relative to first surface 5b, longer second surface 5c and the 3rd shorter surperficial 5d has a pair bellying 5e bloated by these faces respectively, by terminal 5 being inserted in the insertion groove 2a (with reference to Fig. 3) of setting on pedestal 2, realizing so-called press-in and installing.In addition, second surface 5c is also terminal 5 and through the solder side of the conductor 13 of zero phase current transformer 12 or the solder side of terminal 5 and the conductor second surface 5c and static contact 7 (not shown).

Bend between the first surface 5b and second surface 5c of the terminal 5 of this L-shaped is provided with jut 5f, and this jut 5f is extended out by first surface 5b and coplanar with first surface 5b, namely forms same plane with the 1st surperficial 5b.In addition, as shown in Figure 2, cover portion 1 is provided with protuberance 1b, outstanding to pedestal 2 side with the interface that pedestal 2 docks by cover portion 1 of this protuberance 1b.Both, namely the position relationship of jut 5f and protuberance 1b is as shown in Figure 3, and protuberance 1b is positioned at the top of jut 5f on paper, and with jut 5f near arranging.Therefore, not only can guarantee to have enough spaces for connecting electric wire or being crimped on the crimp type terminal on electric wire top, namely the space of sufficient first surface 5b can be guaranteed, and, after electric wire and terminal 5 are fastenedly connected by construction of cable run operator, such as when extracting the screwdriver being inserted in screw head, and because of certain origin of an incident in the situation such as during electric wire imposed load, terminal 5 can be prevented to be moved upward (or distortion).Therefore for the insertion of terminal 5 to insertion groove 2a, its press-in situation can be decided from the angle of assembleability, be conducive to guaranteeing stay in grade, and can significantly reduce assembling expense.At this, " close " refers to, when chimeric cover portion 1 and pedestal 2, the distance between the protuberance 1b be oppositely arranged and jut 5f is nearer distance, but this distance can not make the two mutually interfere and hinder cover portion 1 chimeric with pedestal 2.That is, the distance of the protuberance 1b of relative configuration and the spaced apart nearer of jut 5f, the setting of this distance is the consideration having dimensional tolerance based on protuberance 1b.Certainly, only otherwise hinder the chimeric of cover portion 1 and pedestal 2, protuberance 1b also can contact with jut 5f.

In addition, as shown in Figure 3 or Figure 4, top and the second surface 5c of jut 5f are coplanar, and namely jut 5f does not protrude from second surface 5c, thus more can guarantee the insertion space of the leakage detecting circuit 12a that the zero phase current transformer 12 such as shown in Fig. 2 has, be preferably mode.In addition, in the present embodiment, protuberance 1b is integrally formed with cover portion 1, but such as also can be as shown in Figure 5, protuberance is other parts, namely consists of partition 14 and contacts with jut 5f, especially, when the gas produced when cutting off electric arc to arc-control device 52 is discharged and taked countermeasure, itself and mains side binding post 4 are combinationally used effect better.As partition 14, when arranging protuberance as other parts, when configuring breaker pedestal 2 being positioned at below, protuberance 1b contacts with jut 5f due to deadweight.In addition, when configuring breaker, when the deadweight of protuberance 1b is not towards jut 5f side, protuberance 1b also can not contact with jut 5f.That is, identical with the situation forming protuberance 1b in cover portion 1, as long as protuberance 1b (partition 14) and jut 5f are near arranging.

Claims (3)

1. a breaker, has:

Casing, it is made up of the cover portion formed with insulator and pedestal;

Open-close mechanism section, it is configured between the frame plate of relative configuration, has the operating grip stretched out by described cover portion;

Transverse arm, itself and described open-close mechanism section link and rotate;

Moving contact, itself and described transverse arm link, and it at least has movable contact in one end;

Static contact, it has stationary contact, and described stationary contact can contact with described movable contact and be separated, the two contact be separated and can switch;

Arc-control device, it is for being breaking at the electric arc produced between described stationary contact and described movable contact;

Binding post, it is L-shaped, between described static contact and the electric wire be connected with breaker, or between described moving contact and the electric wire be connected with breaker, is fixed by being pressed into described pedestal,

It is characterized in that,

Jut is provided with at the bend of the binding post of described L-shaped, described jut has by the extended surface that extends out of the surface co-planar be connected with described electric wire ground, the extended surface of described jut and the top of protuberance come close to or in contact with, and the interface that described protuberance is docked by described cover portion and described pedestal is outstanding to described pedestal side.

2. breaker according to claim 1, is characterized in that,

The surface formed after the surface curvature be connected with electric wire of described binding post and the top of described jut coplanar.

3. breaker according to claim 1 and 2, is characterized in that,

Described protuberance is integrally formed with described cover portion.