CN2140561Y

CN2140561Y - Improved switch structure without fuse

Info

Publication number: CN2140561Y
Application number: CN 92240660
Authority: CN
Inventors: 陈赞棋
Original assignee: 张莎莉
Current assignee: Chen Shaofeng
Priority date: 1992-12-31
Filing date: 1992-12-31
Publication date: 1993-08-18
Anticipated expiration: 2002-12-31

Abstract

The utility model provides an improved switch structure without fuse. The improved switch structure is characterized in that the upper side of a bimetallic piece of a tripping device is provided with an adsorption piece with nice magnetic conductivity, and a lever extended with a lug above the adsorption piece. Through the improvement, the adsorption piece can generate magnetism when the current is too large and absorb the lug of the lever, so that the lever is disengaged from a butting piece of a switch device, so an on-off piece is tripped from an input device to cut off a circuit. The utility model has the advantages of simple structure, easy manufacture and low cost.

Description

Improved switch structure without fuse

The utility model is about a kind of no-fuse switch structure, is meant more easy no-fuse switch improvement structure in a kind of simple structure, the manufacturing especially.

For guaranteeing the safety of electricity consumption, circuit arrangement mostly is provided with protective device, is with fuse control safe load amount the earliest, when the electric current overloading, and the blown fuse circuit interruption, dress changes very inconveniently again then, is the appearance that no-fuse switch is arranged therefore.

No-fuse switch commonly used shown in Figure 1 includes: housing 11, input unit 12, switching device 13, tripping device and output device 15.Input unit 12 is disposed at one of housing 11 side, which is provided with stretch into interior contact 121 of housing 11 and link spiral shell seat 122; Switching device 13 is disposed in the housing 11, it comprises toggle 131, clutch part 132 and supports part 133, one of clutch part 132 end is connected in one of toggle 131 end, the other end convexes with contact 1321 and makes and can engage with contact 121, support the wall that one of part 133 end is hubbed at housing 11, but its other end is provided with convex surface 1331 makes mat spring 134 be connected with clutch part 132, and sheathed push rod 135 makes and can peak at convex surface 1331 in the spring 134, makes can use to affect to part 133 when clutch part 132 rotates to rotate; Tripping device comprises bimetal leaf 141, lever 142, spring 143 and magnetizing coil 144, bimetal leaf 141 is located in the housing 11, lever 142 is located at one of bimetal leaf 141 side and mat spring 143 and is compressed and make the one end be butted on bimetal leaf 141, and its other end can be supported part 133 against, magnetizing coil 144 is located at lever 142 other ends top, and excitatory edge circle 144 mat electric wires 101 are electrically connected with clutch part 132; Output device 15 is located at the opposite side of housing 11, and mat copper sheet 151 and bimetal leaf 141 and magnetizing coil 144 are in succession.

During above-mentioned structure normal power supply state among Fig. 1, electric current by input unit 12-clutch part 132-electric wire 101-magnetizing coil 144-copper sheet 151-bimetal leaf 141-electric wire 102-guide card 103 to output device 15.Temperature rising (see figure 2) when the power load amount is excessive, bimetal leaf 141 pushes lever 142 because of heated bending, and the part 133 that supports of switching device 13 opens circuit because of losing against clutch part 132 escapes are formed; When current anomaly was excessive, big electric current made magnetizing coil 144 produce magnetic field effect, attracts one of lever 142 end (direction of arrow among the figure), supported part 133 and also opened circuit because of losing against clutch part 132 escapes are formed; And when desiring to connect again, toggle 131 must rightly earlier be dialled clutch part 132 is rotated, mat push rod 135 will make before part 133 is pushed to against one of lever 142 end (see figure 3), and so the contact of just understanding with input unit 12 when toggle 131 clutch part 132 when setting aside 121 connects.

Above-mentioned no-fuse switch really can improve the traditional insurance silk and use last shortcoming, and can open circuit by escape when guaranteeing the excessive or current anomaly of load, but it texturally must be provided with magnetizing coil, increases cost, push rod 135 must be sheathed in the spring 134 in addition, and is very inconvenient in the manufacturing.

The purpose of this utility model is to avoid the above-mentioned weak point of prior art, and a kind of more or less freely and no-fuse switch that reduces cost improvement structure in internal structure, the manufacturing of simplifying is provided.

Task of the present utility model is finished by following technical measures, and (in conjunction with the accompanying drawings) described in detail embodiment.

The explanation of accompanying drawing drawing:

Fig. 1 is that no-fuse switch commonly used is configured in the plane graph when connecting.

Fig. 2 is the plane graph of no-fuse switch commonly used when being configured in escape.

Fig. 3 is that no-fuse switch commonly used is configured in and desires to connect preceding plane graph.

Fig. 4 is the plane graph of the utility model when connecting.

Fig. 5 is the stereogram of the switching device of the utility model.

Fig. 6 is the plane graph of the utility model when escape.

The plane graph that Fig. 7 is the utility model before desiring to connect.

The utility model shown in Figure 4 includes housing 20, input unit 30, switching device 40, tripping device 50 and output device 60.

Housing 20 inside are provided with a division board 21, and input unit 30 is disposed at one of housing 20 side, which is provided with one and stretch into the interior contact 31 of housing 20 and the spiral shell seat 32 of link; Switching device 40(sees Fig. 5) be disposed in the housing 20, it comprises toggle 41, clutch part 42 and supports part 43.One end of clutch part 42 is connected in one of toggle 41 end, its other end convexes with contact 421 and makes and can engage with contact 31, other which is provided with the machine leader 422 and the sliding portion 423 that supports of projection, support part 43 1 ends and be hubbed at wall within the housing 20, but the other end be provided with a cover collude 431 make mat spring 401 and clutch part 42 before end is connected, its machine leader 422 can affect to part 43 rotations when clutch part 42 rotations.

Tripping device comprises bimetal leaf 51 and lever 52.Bimetal leaf 51 is located in the housing 20, and its right side is provided with the good absorption sheet of magnetic conductivity--iron plate 511 than upper end; Lever 52 is located at supporting between the part 43 of bimetal leaf 51 and switching device 40, and mat elastomer 501 compresses and makes lever one end 521 be butted on bimetal leaf 51, the lever other end 522 supported part 43 against, lever 52 extends to the right side of bimetal leaf 51 and is provided with a lug 523 in addition.

Output device 60 is located at one of housing 20 side, and mat copper sheet 601 is connected with bimetal leaf 51, is connected by the clutch part 42 of copper cash 602 switching devices 40.

During structure normal power supply shown in Figure 4, toggle 41 is pulled left, and then contact 31 engages with contact 421, electric current promptly by input unit 30 inputs through clutch part 42-copper cash 602-bimetal leaf 51-copper sheet 601-at last by output device 60 outputs.Temperature raises when the power load amount is excessive, and bimetal leaf 51(sees Fig. 6) because of heated bending pushes lever one end 521, lever 52 is rotated, the part 43 that supports of switching device 40 opens circuit because of losing against clutch part 42 escapes are formed; (see figure 4) when current anomaly is excessive, absorption sheet--iron plate 511 produces magnetic field effect, absorbs the lug 523 of lever, and lever thereby rotation (shown in dotted line) are also opened circuit because of losing against clutch part 42 escapes are formed as shown in Figure 6 and support part 43; When desiring to connect again, toggle 41(sees Fig. 6) must turn right earlier and dial the cunning make clutch part 42 to support the wall that portion 423 props up division board 21 be fulcrum, and mat traction piece 422 will make on lever one end 522 on part 43 be pushed to, as shown in Figure 7, so connect when this toggle 41 contact 31 that clutch part 42 is just understood with input unit 30 downwards the time.

Bimetal leaf 51 one sides of tripping device that are characterised in that of the present utility model are provided with the good absorption sheet of a magnetic conductivity--iron plate 511, lever 52 extensions are provided with a lug 523 to be made on iron plate 511, when electric current is too big, make iron plate 511 produce magnetic field effect, attract the lug 523 of lever, clutch part 42 escapes are formed open circuit.

The utility model--innovation structure can replace the higher magnetizing coil of cost in the no-fuse switch commonly used, clutch part 42 is provided with machine leader 422 in addition, direct forming is very simple and easy in the manufacturing, but have the identical effect that the push rod 135 among Fig. 1 promotes to support part, the push rod 135 among Fig. 1 is artificial sheathed time-consuming on making.

Claims

1, no-fuse switch improvement structure includes housing 20, input unit 30, switching device 40, tripping device 50 and output device 60, and input unit 30 is disposed at one of housing 20 side, which is provided with one and stretches into the interior contact 31 of housing 20; Switching device 40 is disposed in the housing 20, it comprises toggle 41, clutch part 42 and supports part 43, and an end of clutch part 42 is connected in one of toggle 41 end, and its other end convexes with contact 421, support part 43 1 ends and be articulated in the housing 20, and mat spring 401 is connected with clutch part 42; Tripping device 50 comprises bimetal leaf 51 and lever 52, bimetal leaf 51 is located in the housing 20, lever 52 is located between bimetal leaf 51 and the switching device 40, and an end of mat elastomer 501 supported part 43 against, the other end is then against bimetal leaf 51, opposite side and bimetal leaf 51 that output device 60 is located at housing 20 connect in succession and with switching device 40, bimetal leaf 51 right sides that it is characterized in that tripping device 50 are provided with the good absorption sheet 511 of magnetic conductivity, and lever 52 extends and is provided with lug 523 and makes that to be positioned at absorption sheet 511 other.

2, no-fuse switch improvement structure according to claim 1 is characterized in that the clutch part 42 of switching device 40 is provided with machine leader 422.