A kind of isolating switch
Technical field
The present invention relates to the low-voltage circuit terminal appliance, a kind of specifically isolating switch.
Background technology
Existing isolating switch is when closing by hand, and the moving contact closing speed depends on the handle velocity of rotation.The pressure of moving contact is to start from scratch gradually to increase, and this can cause and draw electric arc, thereby influence the useful life of contact.And existing isolator operating mechanism is complicated, and product cost is higher, and reliability is low.
Summary of the invention
To the defective that exists in the prior art, the object of the present invention is to provide a kind of isolating switch, simple in structure, modern design, operating handle is light, and reliability is high.
For reaching above purpose, the technical scheme that the present invention takes is: a kind of isolating switch, comprise the shell, fixed contact system, moving contact system and the break-make indicating mechanism that form by base and lid, particularly:
Handle places in the corresponding circle hole on base top, and a pin of handle torsion spring is inserted in the circular hole A44 on the base, and the another pin is inserted in the circular hole B45 on the handle;
Place the fixed contact system of the left end of base to comprise left wire frame, left terminal block and fixed contact; Fixed contact is fixed on left terminal block right-hand member; The left end of left side terminal block is inserted in the left wire frame that places chassis left side, and screw is screwed in the left wire frame after passing the circular hole on the left terminal block;
The moving contact system comprises gusset piece, moving contact and moving contact rack; Moving contact is fastening through gusset piece and moving contact rack; Gusset piece is connected with right terminal block left end through being flexible coupling; The right-hand member of right terminal block is inserted in the right wire frame that places the base right side; Screw is screwed in the right wire frame after passing the circular hole on the right terminal block, and the straddle mounting of moving contact torsion spring is between the sliding tray of moving contact rack both sides, and the moving contact fixed axis is inserted in the circular hole D47 on the base after passing the circular hole C42 of moving contact rack right-hand member;
One end of U-shaped connecting rod is inserted in second gathering sill of base after passing the sliding tray and the circular hole E41 on the moving contact torsion spring of moving contact rack both sides successively, and the other end is inserted among the circular hole F46 on the handle, and second gathering sill is arranged between fixed contact and moving contact;
Break-make indicating mechanism comprises indication piece, indication linkage bar and indication piece fixed axis; Indication piece is inserted in the circular hole on the base through the indication piece fixed axis; One end of indication piece trace hangs in the circular hole H43 on the moving contact rack, and the other end places sliding tray and first gathering sill on the base on the indication piece successively.
On the basis of technique scheme, the right side of left wire frame and the left side of right wire frame are provided with the spring leaf of its state that moves up and down of qualification, on base, are provided with the groove that spring leaf is played position-limiting action.
On the basis of technique scheme, the left lower end of base is provided with buckle, and lid is adaptive with base.
Isolating switch of the present invention, simple in structure, modern design, operating handle is light, and reliability is high.
Description of drawings
The present invention has following accompanying drawing:
The structural representation of Fig. 1 isolating switch base
The structural representation of Fig. 2 isolating switch lid
The structural representation of Fig. 3 fixed contact system
The structural representation of Fig. 4 moving contact system
The structural representation of Fig. 5 break-make indicating mechanism
Embodiment
Below in conjunction with accompanying drawing the present invention is done further explain.
The invention discloses a kind of isolating switch, comprise the shell, fixed contact system, moving contact system and the break-make indicating mechanism that are made up of base and lid, handle places in the corresponding circle hole on base top, and the handle torsion spring is arranged between base and the handle; The fixed contact system places the left end of base; The moving contact system places the right-hand member of base, and the U-shaped connecting rod connects moving contact rack and handle and an end and is arranged in the gathering sill on the base; Break-make indicating mechanism comprises indication piece, indication linkage bar and indication piece fixed axis; Indication piece is inserted in the circular hole G on the base through the indication piece fixed axis; One end of indication piece trace hangs in the circular hole H on the moving contact rack, and the other end places sliding tray and the gathering sill on the base on the indication piece successively.Specifically; Fig. 1 is the structural representation of isolating switch base of the present invention; Comprise the shell, fixed contact system 2, moving contact system 1 and the break-make indicating mechanism that are made up of base 3 and lid 12 (referring to Fig. 2), as shown in Figure 1, handle 9 places in the corresponding circle hole on base 3 tops; A pin of handle torsion spring 11 is inserted in the circular hole A44 on the base 3, and the another pin is inserted in the circular hole B45 on the handle 9;
As shown in Figure 3; Place the fixed contact system 2 of the left end of base 3 to comprise left wire frame 142, left terminal block 15 and fixed contact 16; Fixed contact 16 is fixed on left terminal block 15 right-hand members; The left end of left side terminal block 15 is inserted in the left wire frame 142 that places base 3 left sides, and screw 141 is screwed in the left wire frame 142 after passing the circular hole on the left terminal block 15;
As shown in Figure 4; Moving contact system 1 comprises gusset piece 19, moving contact 20 and moving contact rack 18; Moving contact 20 is fastening through gusset piece 19 and moving contact rack 18; Gusset piece 19 17 is connected with right terminal block 21 left ends through being flexible coupling, and the right-hand member of right terminal block 21 is inserted in the right wire frame 143 that places base 3 right sides, and screw 141 is screwed in the right wire frame 143 after passing the circular hole on the right terminal block 21; 22 straddle mountings of moving contact torsion spring are between the sliding tray 54 of moving contact rack 18 both sides, and moving contact fixed axis 5 is inserted in the circular hole D47 on the base 3 after passing the circular hole C42 of moving contact rack 18 right-hand members;
As shown in Figure 1; After one end of U-shaped connecting rod 8 passes the sliding tray 54 and the circular hole E41 on the moving contact torsion spring 22 of moving contact rack 18 both sides successively; Be inserted in the gathering sill 53 of base 3, the other end is inserted among the circular hole F46 on the handle 9, and gathering sill 53 is arranged on 20 of fixed contact 16 and moving contacts;
As shown in Figure 5; Break-make indicating mechanism comprises indication piece 13, indication linkage bar 7 and indication piece fixed axis 6; Indication piece 13 is inserted in the circular hole G48 on the base 3 through indication piece fixed axis 6; One end of indication piece trace 7 hangs in the circular hole H43 on the moving contact rack 18, and the other end places the gathering sill 51 on sliding tray 52 and the base 3 on the indication piece 13 successively.
On the basis of technique scheme, as shown in Figure 1, the left side of the right side of left wire frame 142 and right wire frame 143 is provided with the spring leaf 10 of its state that moves up and down of qualification, on base 3, is provided with the groove to 10 position-limiting actions of spring leaf.
On the basis of technique scheme, as shown in Figure 1, the left lower end of base 3 is provided with buckle 4, and lid 12 is adaptive with base 3.Lid 12 is snapped together by buckle 4 with base 3, constitutes the shell of isolating switch.
Isolating switch operation principle of the present invention is following:
When clockwise direction rotatablely moves under the effect of handle 9 in external force; The moment of handle torsion spring 11 strengthens gradually and drives 8 motions of U-shaped connecting rod simultaneously; Then cause that U-shaped connecting rod 8 drives 22 motions of moving contact torsion spring; And because 22 straddle mountings of moving contact torsion spring are in the both sides of moving contact rack 18, so when 22 motions of moving contact torsion spring, the moment of torsion that acts on moving contact rack 18 both sides makes moving contact rack 18 do counterclockwise to rotatablely move around its moving contact fixed axis 5.Fastening because of moving contact 20, gusset piece 19 and moving contact rack 18 threes again, thus when moving contact rack 18 motion, moving contact 20 also its around moving contact fixed axis 5 do counterclockwise to rotatablely move and with fixed contact 16 near.On the other hand, in the time of moving contact rack 18 motions, also driven indication piece 13 and done counterclockwise to rotatablely move around its indication piece fixed axis 6 through indication piece trace 7.
When the continuation clockwise direction rotatablely moves certain angle under the effect of handle 9 in external force; Handle button spring 11 acts on moment on the handle 9 acts on the moment on the handle 9 greater than external force moment; Even under the effect that does not have external force; Handle 9 also can rotatablely move as clockwise direction under the effect of handle button spring 11 fast in continuation, and the effect through the U-shaped connecting rod makes dynamic and static contact closed fast then.Indication piece shows closure state at this moment.
When counterclockwise rotatablely moving under the effect of handle 9 in external force, the moment of handle torsion spring 11 strengthens again gradually, because the effect of moving contact torsion spring 22; Dynamic and static contact is kept closed; When handle 9 continued counterclockwise to rotatablely move certain angle, even without the external force effect, handle 9 was under the effect of handle torsion spring 11 and moving contact torsion spring 22 moments; Also can continue to do fast counterclockwise to rotatablely move, and dynamic and static contact separated fast through the effect of U-shaped connecting rod 8.Indication piece shows off-state at this moment.