CN1275785A - Circuit breaker - Google Patents

Abstract

In the present invention, the external cap is fixed at the foundation base of a circuit breaker through the use of snap fit to provide the circuit breaker, in which the external cap is not easily come off so as to prevent the snap portion of external cap side or the snap portion of foundation base side from being damaged when too large acting force is added to the external portion of the conductor connected to terminal portion or when too large acting force is added to the external cap during the handle operation. Multiple terminal portions are installed at the foundation base in which the separation wall is made to situate in the middle and the external cap is fixed at the foundation base of circuit breaker through the use of snap fit. The invention is characterized in having an inserting concave portion, which is installed at the separation wall by following the mounting direction of the external cap, and an inserting convex portion, which is installed at the external cap and is embedded into the inserting concave portion when mounting the external cap.

Description

Circuit breaker

The present invention relates to the circuit breaker of protective circuit, relate in particular to the assembly structure between its pedestal and the lid.

To Fig. 9 conventional art is described below in conjunction with Fig. 4.

Fig. 4 is the real pedestal on the circuit breaker shown in the flat 5-66857 communique and the stereogram of lid state before assembling opened of expression.Fig. 5 is the cutaway view along A-A line among Fig. 4, and Fig. 6 is the major part exploded perspective view of circuit breaker shown in Figure 4, and Fig. 7 is the cutaway view along B-B line among Fig. 4.

In Fig. 4, the 1st, in adorn not shown switching mechanism and many to opening and closing the pedestal of the container-like circuit breaker of box contact etc., that make with insulating material such as synthetic resin.Illustrated pedestal 1 is the pedestal that sets 2 utmost point switching mechanisms etc., thus be provided with realize 2 mutually between the partition wall 20,21 of insulation usefulness.

In Fig. 4 and Fig. 6, the 10th, portion of terminal, the no scolding tin terminal 3 that comprises the terminal board 2 made with the conductor of formations such as copper or copper alloy, makes with the conductor of formations such as copper or copper alloy, and terminal screw 4 etc.

In Fig. 4, the 5th, the lid with insulating material such as synthetic resin are made covers said base 1 with it during assembling from the top.

In Fig. 4, the 6th, the groove external conductor is arranged, be clipped between terminal screw 4 and the terminal board 2, be electrically connected with terminal board 2.The 7th, the slotless external conductor is clipped between terminal board 7 and the no scolding tin terminal 3, is electrically connected with terminal board 2.

In Fig. 6, have the base side chuck 1b of portion, the 1b of protuberance in an outside side setting that is arranged on the partition wall 20,21 of pedestal 1 central length direction in order to realize the insulation between each phase by casing.

In addition, 1c is the supporting base of the position of decision terminal board 2, and 1d inserts the conductor patchhole that external conductor is used, and 1e determines the vertical support seat that the position of terminal board 2 is used jointly with above-mentioned supporting base 1c, and 1f is the pedestal inner face that is equivalent to the inner face of pedestal 1.

The 3rd, no scolding tin terminal, intercalation is passed terminal screw 4 the through hole 2c on the horizontal upper part 2b of terminal board 2 and is tightened with threaded portion 3a on the horizontal lower 2a of terminal board 2, is assembled into one like this, constitutes portion of terminal 10 thus.

The vertical lower 2d that this portion of terminal 10 is assembled into terminal board 2 is positioned at the state on the supporting base 1c of pedestal 1, compressed part 5b with pedestal inner face 1f, supporting base 1c, vertical support seat 1e and the lid described later 5 of pedestal 1 comes it is supported and fixes, even there is external force to act on external conductor 6 or 7, portion of terminal 10 can not become flexible yet.5a is provided in a side of the lid side chuck portion on the lid 5, is in this example a hole that cooperates with the protuberance that is located at a base side chuck 1b of portion on the partition wall 20 is set.5b be push side daughter board 2 vertical top 2e and with the fixing compressed part of usefulness of terminal board 2.

In circuit breaker with said base 1 and lid 5, the lid side chuck 5a of portion of lid 5 earlier will be by clamping connection amount L1 distortion shown in Figure 5,1 chimeric with the pedestal chuck portion of the pedestal 1 of (not shown) such as interior dress switching mechanisms again (with call in the following text this chimeric be that chuck cooperates), like this pedestal 1 and lid 5 are assembled into one.

Fig. 8 is the cutaway view that expression has groove external conductor 6 and circuit breaker connection status, between the horizontal upper part 2b of terminal screw 4 and terminal board 2, insert the slot part of external conductor 6, and the threaded portion 3a of terminal and no scolding tin terminal 3 tightened, so that the external conductor 6 and the terminal board 2 of trough of belt are electrically connected.

In addition, Fig. 9 is the cutaway view of expression external conductor 7 and circuit breaker connection status, the leading section of external conductor 7 passes the conductor patchhole 1d of pedestal 1 and inserts between the horizontal lower 2a of no scolding tin terminal 3 and terminal board 2, and the terminal screw 4 threaded portion 3a with no scolding tin terminal 3 tightened, external conductor 7 and terminal board 2 are electrically connected.

In the conventional circuit breaker of said structure, shown in the arrow of Fig. 8, in case the external conductor 6 to trough of belt applies excessive power, the external conductor 6 of trough of belt will upwards push away lid 5, cause the chuck cooperation place to be thrown off, and then cause lid 5 to come off or lid side chuck 5a of portion and the base side chuck 1b of portion breakage from pedestal 1.

And for example shown in Figure 9, in case the external conductor 7 that inserts conductor patchhole 1d is applied excessive power, will apply power for the compressed part 5b of the lid 5 that is fixed terminal board 2 by terminal board 2, can cause lid 5 to come off from pedestal 1, or lid side chuck 5a of portion and the base side chuck 1b of portion breakage.

Shown in Figure 5 again, when handling the handle (not shown) of circuit breaker, in case lid 5 is applied the power of the direction of arrow, deflection will take place in power end or load end one side's the lid side chuck 5a of portion, cause an opposite side's lid side chuck 5a of portion and the clamping connection amount L1 between the base side chuck 1b of portion to disappear, lid 5 comes off easily.

Purpose of the present invention just is to address the above problem, and provides a kind of difficult generation lid 5 to come off, be difficult for taking place the circuit breaker of lid side chuck 5a of portion or the base side chuck 1b of portion breakage from pedestal 1.

The invention of technical scheme 1 is a kind of circuit breaker, have pedestal that a plurality of portion of terminal are set across partition wall and cooperate the lid that is fixed on the aforementioned pedestal by chuck, be characterized in having along the installation direction of aforementioned lid and be located at the insertion recess on the aforementioned partition wall and be located on the aforementioned lid and when lid is installed and the chimeric insertion protuberance of aforementioned insertion recess.

The invention of technical scheme 2 is on the circuit breaker of scheme 1, the chuck cooperation is the chimeric realization by base side chuck portion and lid side chuck portion, aforementioned base side chuck portion is arranged on the adjacent position of inserting recess, and aforementioned cover side chuck portion is arranged on the adjacent position of aforementioned insertion protuberance.

The invention of technical scheme 3 is on the circuit breaker of scheme 1 or 2, on lid, with this bottom surface the buffering joint-cutting is set abreast between the bottom surface of lid side chuck portion and lid.

Simple declaration to accompanying drawing

Fig. 1 is the stereogram of the circuit breaker of state before expression pedestal and the lid assembling.

Fig. 2 is the C-C line cutaway view of Fig. 1.

Fig. 3 is the load end end view of circuit breaker shown in Figure 1.

Fig. 4 is the pedestal of expression conventional circuit breaker and the stereogram of the preceding state of lid assembling.

Fig. 5 is the A-A line cutaway view of Fig. 4.

Fig. 6 is the major part exploded perspective view of circuit breaker shown in Figure 4.

Fig. 7 is the B-B line cutaway view of Fig. 4.

Fig. 8 is the cutaway view that expression has groove external conductor and conventional circuit breaker connection status.

Fig. 9 is the cutaway view of expression external conductor and conventional circuit breaker connection status.

Below in conjunction with description of drawings example of the present invention.

Example 1

Example 1 has by chuck and cooperates the lid 5 be fixed on the pedestal 1, is provided in a plurality of portion of terminal 10 in the pedestal 1 side by side, and will be equipped on the portion of terminal 10 spaced states in the said base 1 side by side, on pedestal 1, be arranged with as the insertion groove 30,31 that inserts recess, on above-mentioned lid, be convexly equipped with as inserting protuberance and lid partition wall 40,41 that can be chimeric with above-mentioned insertion groove 30,31.

In addition, chuck cooperates by the chimeric realization between the base side chuck 1b of portion, 1b and the lid side chuck 5a of portion, the 5a, an above-mentioned side's the base side chuck 1b of portion is positioned at the adjacent position of insertion groove 30, the opposing party's the base side chuck 1b of portion then is positioned at the adjacent position of insertion groove 31, an above-mentioned side's the lid side chuck 5a of portion is positioned at the adjacent position of lid partition wall 40, and the opposing party's the lid side chuck 5a of portion then is positioned at the adjacent position of lid partition wall 31.

Between the lid side chuck 5a of portion, 5a and lid bottom surface 5f, set buffering joint- cutting 5g, 5g abreast respectively with this lid bottom surface 5f.

Below to Fig. 1 this example 1 is described with Fig. 1.

Fig. 1 is the stereogram of the circuit breaker of the preceding state of expression pedestal and lid assembling, and Fig. 2 is the C-C line cutaway view of Fig. 1, and Fig. 3 is the load end end view of circuit breaker shown in Figure 1.

All parts identical or suitable with conventional circuit breaker are all represented with same-sign among the figure, and omit its explanation.

In Fig. 1 and Fig. 2,30, the 31st, be provided in respectively each self-forming on the partition wall 20,21 at central length direction two ends of pedestal 1, as the insertion groove that inserts recess, when lid 5 is installed, insert above-mentioned insertion groove as inserting the partition wall 40,41 that protuberance is located on the lid 5 respectively along installation direction with described later.

In this example, lid 5 is assembled into the state that covers pedestal 1 from the top, so insertion groove 30,31 forms in the width of base side partition wall 20,21 from the upper end to vertically extending hole, lower end, is to form flat square hole in this example.Correspondingly, 40,41 formation of lid side partition wall are to form tabular projection in this example from the projection that the bottom surface 5f of lid 5 extends vertically downward.

The tabular lid partition wall 40,41 that on this lid 5, forms under the insertion state with the horizontal side 1I driving fit of the longitudinal side 1h and the insertion groove 30,31 of insertion groove 30,31.5d is the bight of lid side partition wall 40,41, and 5e is the leading section of lid partition wall 40,41.5g is along lid bottom surface 5f or the parallel buffering joint-cutting that sets with lid bottom surface 5f between the lid side chuck 5a of portion and lid bottom surface 5f.

On above-mentioned circuit breaker, in lid 5 is installed on the pedestal 1 of dress switching mechanism etc. (not shown) time, it is chimeric with the insertion groove 30,31 that is provided on the pedestal 1 respectively at first the lid side to be separated the leading section 5e, the 5e that split wall 40,41, lid side partition wall 40,41 inserts along the longitudinal side 1h and the horizontal side 1I of insertion groove 30,31, lid chuck 5a of portion and the base side chuck 1b of portion realize that chuck cooperates, and is fixed on lid 5 on the pedestal 1.

Carrying out chuck when cooperating owing to be provided with buffering joint-cutting 5g, so the lid side chuck 5a of portion generation deflection, make with the base side chuck 1b of portion between chuck cooperate smooth.

In addition, because the fitting portion size between lid side partition wall 40,41 and the insertion groove 30,31 is made the minimum state in gap mutual under the insertion state, so when for example the external conductor 6 of trough of belt being applied the excessive forces of direction shown in image strip 8 arrows, before this power imposes on lid 5 the bight 5d of lid side partition wall 40,41 just with the longitudinal side 1h butt of pedestal 1, so power can directly not impose on the lid side chuck 5a of portion.

And for example when external conductor 7 is applied the excessive forces of Fig. 9 direction of arrow, before this power puts on compressed part 5b, the leading section 5e of lid 5 just with the horizontal side 1I butt of pedestal 1, so power can directly not impose on the lid side chuck 5a of portion.

In addition, when when control crank, lid 5 being applied the excessive forces of direction shown in Fig. 5 arrow, because the longitudinal side 1h butt of bight 5d and pedestal 1, so can guarantee clamping connection amount L1 between lid side chuck 5a of portion and the base side chuck 1b of portion.

Again since lid side partition wall 40,41 extend in vertical direction, and it is chimeric between the insertion groove 30,31 with enough insertion depths, even make lid 5 come-ups so be contained in the gas pressure that produces when switching contact (not shown) in the pedestal 1 cuts off big electric current, also can guarantee and insertion groove 30,31 between chimeric.

Adopt every invention of technical scheme 1 to 3, even when the external conductor that is connected with portion of terminal is applied in excessive power, or grasp when lid is applied in excessive power when vertical handle, lid is difficult drop-off also.

In addition, make the lid come-up, insert recess and insert chimeric between the protuberance and also can fully guarantee portion of terminal creeping discharge distance each other, so can not cause the insulating capacity reduction even open and close the gas pressure that produces when contact cuts off big electric current.

Again, adopt technical scheme 2, can prevent lid side chuck portion or the breakage of base side chuck portion.

Again because base side chuck portion and lid side chuck portion realize what chuck cooperated when the insertion protuberance is inserted into the recess guiding, so successfully lid is installed on the pedestal easily.

In addition, adopt technical scheme 3, when realizing that chuck cooperates, the buffering joint-cutting makes and covers the easy deflection of side chuck portion, so successfully lid is installed on the pedestal easily.

Claims (3)

1. circuit breaker, have pedestal that a plurality of portion of terminal are set across partition wall and cooperate the lid that is fixed on the described pedestal by chuck, it is characterized in that having along the installation direction of described lid and be located at the insertion recess on the described partition wall and be located on the described lid and when lid is installed and the chimeric insertion protuberance of described insertion recess.

2. circuit breaker according to claim 1, it is characterized in that, chuck cooperates by the chimeric realization between base side chuck portion and the lid side chuck portion, and described base side chuck portion is arranged on the adjacent position of insertion recess, and described lid side chuck portion is arranged on the adjacent position of described insertion protuberance.

3. circuit breaker according to claim 2 is characterized in that, on lid, with this bottom surface the buffering joint-cutting is set abreast between the bottom surface of lid side chuck portion and lid.

Images