CN201066658Y

CN201066658Y - Automatic protection switch for low-voltage electrical appliance

Info

Publication number: CN201066658Y
Application number: CNU2007201746611U
Authority: CN
Inventors: 沈世德
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-21
Filing date: 2007-08-21
Publication date: 2008-05-28
Anticipated expiration: 2017-08-21

Abstract

The utility model discloses an automatic protective switch of a low-voltage apparatus, which comprises a box, a reset handle and an on-off mechanism with a bimetallic plate working as the main body and arranged in the box. The utility model comprises a bimetallic plate, a sliding block, a hooked pressure plate a reset spring and an auxiliary plate of the sliding block. The middle part of the box is provide with an insulation clapboard, and the center is provided with a small hole slot. The rear end of the sliding block is provided with a concave cavity, and the inside thereof is provided with the reset spring, and the bottom thereof is embedded with the auxiliary plate of the sliding block. The bottom of the auxiliary plate is provided with a protruding arc ball; the arc ball is stressed on the hook pressure plate fixedly connected with the bimetallic plate under the insulation clapboard; the tip end of the hook pressure plate hooks or releases the ball on the bottom of the auxiliary plate of the sliding block through the small hole slot in the center of the insulation clapboard so as to control the on and the off of the circuit. The utility model has the advantages of novel structure, compact layout, sensitive control and convenient reset. Because of not using the spare fuse pipe, the utility model is quite applicable to the instruments used in hospital, army, ship, aviation and spacecraft.

Description

The Automatic Protection Switching of low-voltage electrical apparatus

Technical field

The utility model relates to the manufacturing technology field of electrical accessorie, specifically refers to a kind of Automatic Protection Switching of low-voltage electrical apparatus.

Background technology

Any electrical appliance that has big electric current to pass through; general promptly common alleged fuse or the fuse of self-protection device that all have; they have plenty of the discharge cock of front end serial connection at the whole piece circuit; in case to be the load of circuit excessive or form big electric current because of misoperation causes that some part short is short-circuited in its effect; for preventing that electrical appliance from burning automatic shutdown circuit, thus the safety of protection electrical appliance.Its form is various: fuse box, cartridge fuse, strip fuse, fuse are arranged, air switch or the like.But in some low-voltage electrical apparatuses (only referring to that here direct current DC, voltage are lower than the low-voltage electrical apparatus of 60V); existing this class fuse all adopts cartridge fuse usually; though its defencive function is unaffected; when making the fuse failure of cartridge fuse but in case circuit breaks down; want the operate as normal of restore circuit; must change an intact backup fuse pipe immediately, and if this moment, backup fuse was effective intact by chance, cause this equipment normally to come into operation.If this equipment is in hospital, the instrument that uses on naval vessels, boats and ships, the Aeronautics and Astronautics device in case of emergency will be incured loss through delay opportunity of combat, and the consequence that causes when serious is hardly imaginable.Therefore in recent years in the low-voltage electrical apparatus in these fields the fuse of institute's adapted or fuse also all adopt the form of air switch; need not spare parts; can in case of emergency in time reset after fault is got rid of, the utility model is exactly one of protection switch of this form wherein.

The utility model content

Technical problem to be solved in the utility model is: the cartridge fuse that overcomes adapted in low-voltage electrical apparatus uses the inconvenient and easy defective that influences operate as normal; be hospital, army, the instrument that naval vessel, Aeronautics and Astronautics field use provides a kind of and resets easily that fuse is the Automatic Protection Switching of low-voltage electrical apparatus.

The technical scheme of the utility model technical solution problem is: the closed and disconnected mechanism based on bimetal leaf that is provided with in the box body that the utility model is made of loam cake and base, reseting handle and the box body forms.Described box body is made of loam cake and base, be provided with insulating barrier at the box body middle part, the centre is provided with little hole slot, be provided with slide block above the insulating barrier, the mechanism of the closed and disconnected of the control circuit in the box body comprise bimetal leaf, slide block, with the slide block slide block accessory plate that connects together, the hook solid pressing plate and movable contact spring and the static contact that connect together with bimetal leaf.

Described reseting handle is hollow sleeve pipe, be provided with the push rod that resets that can move up and down within it in the chamber, reset push rod the upper end by one the compression spring withstand, the lower end withstands on the movable movable contact spring, reseting handle middle part is provided with lateral pin, and becomes rotating flexible connection between the upper body of base, and reseting handle can be pulled within the specific limits, and the lower end of reseting handle becomes fixedly connected with the connector of movable contact spring, and this connector can be stirred the slide block side-to-side movement by the groove of slide block side.

Described slide block rear end is provided with cavity, in be provided with back-moving spring, the bottom surface of slide block is embedded with the slide block accessory plate, be provided with compression spring above the slide block accessory plate, the bottom of slide block accessory plate is provided with the prominent pearl of arc of projection, and the prominent pearl of this arc is stressed in the hook solid pressing plate of fixedlying connected with bimetal leaf that is arranged under the insulation division board.

One end of described bimetal leaf is fixedlyed connected with steady pin, the other end is connected with adjustment screw, the effect of adjustment screw is the sensitivity of regulating height, gap and the control switch of bimetal leaf, the periphery of adjustment screw also is provided with spring, simultaneously bimetal leaf is electrically connected with static contact, and dynamic and static contact is electrically connected with separately access copper billet respectively again.

Described hook solid pressing plate of fixedlying connected with bimetal leaf, its tip is hooked the prominent pearl of slide block accessory plate bottom surface by the aperture groove in the middle of the insulating barrier or is discharged, and makes the slide block spring that can not be reset push a side to.

The utility model novel structure, compact in design, control is sensitive, resets conveniently.Owing to need not store standby cartridge fuse, be highly suitable for hospital, be equipped with in the instrument that uses on army, naval vessel, the Aeronautics and Astronautics device and use.

Description of drawings

Fig. 1 is the utility model closure state cutaway view;

Fig. 2 is the utility model off-state cutaway view;

Fig. 3 is a profile reference diagram of the present utility model;

Each title and mark among the figure: 1. loam cake, 2. reseting handle, 3. spring, 4. release link, 5. compression spring, 6. slide block, 7. movable contact spring, 8. static contact, 9. back-moving spring, 10. the prominent pearl of insulating barrier, 11. steady pins, 12. bimetal leafs, 13. hook solid pressing plates, 14. adjustment screw, 15. arcs, 16. slide block accessory plates, 17. connect electrolytic copper piece, 18. bases.

Embodiment

The contrast accompanying drawing describes in further detail structure of the present utility model and operating principle below: as shown in Figure 1 to Figure 3, closure and the releasing mechanism based on the bimetal leaf 12 that are provided with in the box body that the utility model is made of loam cake 1 and base 18, reseting handle 2 and the box body are formed.Electrified wire inserts the access copper billet 17 of movable contact spring 7, static contact 8 respectively, makes this product become a fuse cutout in the whole piece low-voltage circuit.During the circuit operate as normal,

movable contact spring

7,8 one-tenth closure states of static contact make circuit turn-on at ordinary times, and instrument or equipment can operate as normal.When circuit load overload or certain partial circuit are short-circuited, the electric current moment increase of circuit, the bimetal leaf 12 of connecting with circuit is bent downwardly because of being subjected to thermal stretching, the hook solid pressing plate 13 that links together with it also moves downward, the tip of crotch breaks away from the prominent pearl 15 of arc of slider bottom, slide block 6 is undone because of pressure, under the promotion of back-moving spring 9 to left movement, the groove of slide block 6 sides drives reseting handle 2 lower ends and movable contact spring 7 is fixedly coupled part, connector promotes the bending section that release link 4 is pressed to movable contact spring 7, after upwards takeofing, release link 4 in the reseting handle 2 pushes down bending section again, the contact and the static contact 8 of movable contact spring 7 are broken away from, circuit breaker, usually said " tripping operation " that Here it is.After the instrument end user checks side by side except fault, this moment, bimetal leaf 12 also returned to normal condition, the operator must pull reseting handle 2 and reset, the top of the release link 4 in the reseting handle 2 slips over the bending section of movable contact spring 7, push down the contact of movable contact spring 7 in the top under the promotion of spring 3 downwards, movable contact spring 7 is contacted once more with static contact 8, circuit turn-on, instrument or equipment can recover operate as normal.And the back-moving spring 9 of this moment is compressed, and slide block accessory plate 16 is got back to the origin-location, and hook solid pressing plate 13 is under self flexible effect, and hook the prominent pearl 15 of the arc of slide block accessory plate 16 bottom surfaces again at its tip, makes this protection switch be in normally off.

Claims

1. the Automatic Protection Switching of a low-voltage electrical apparatus; by box body; the closed and disconnected mechanism based on bimetal leaf (12) that is provided with in reseting handle (2) and the box body forms; it is characterized in that: described box body is made of loam cake (1) and base (18); be provided with insulating barrier (10) at the box body middle part; the centre is provided with little hole slot; be provided with slide block (6) above the insulating barrier (10); the mechanism of the closed and disconnected of control circuit comprises bimetal leaf (12); slide block (6); with slide block (6) the slide block accessory plate (16) that connects together, the hook solid pressing plate (13) and movable contact spring (7) and the static contact (8) that connect together with bimetal leaf (12).

2. the Automatic Protection Switching of low-voltage electrical apparatus as claimed in claim 1; it is characterized in that: described reseting handle (2) is hollow sleeve pipe; be provided with the release link (4) that can move up and down within it in the chamber; the upper end of release link (4) is withstood by a compression spring (3); the lower end withstands on the movable movable contact spring (7); reseting handle (2) middle part is provided with lateral pin; with become rotating flexible connection between the upper body of base (18); the lower end of reseting handle (2) becomes fixedly connected with the connector of movable contact spring (7) again, and this connector can be stirred slide block (6) side-to-side movement by the groove of slide block (6) side.

3. the Automatic Protection Switching of low-voltage electrical apparatus as claimed in claim 1; it is characterized in that: the two sides of described slide block (6) are provided with groove; the rear end is provided with cavity; in be provided with back-moving spring (9); slide block (6) bottom surface is embedded with slide block accessory plate (16); be provided with compression spring (5) above the slide block accessory plate (16); the bottom of slide block accessory plate (16) is provided with the prominent pearl (15) of arc of projection, and this arc pearl (15) that dash forward is stressed in the hook solid pressing plate (13) of fixedlying connected with bimetal leaf (12) that is arranged under the division board (10) that insulate.

4. the Automatic Protection Switching of low-voltage electrical apparatus as claimed in claim 1; it is characterized in that: an end of described bimetal leaf (12) is fixedlyed connected with steady pin (11); the other end is connected with adjustment screw (14); the periphery of adjustment screw (14) also is provided with spring; simultaneously bimetal leaf (12) is electrically connected with static contact (8), and movable contact spring (7), static contact (8) are electrically connected with separately the electrolytic copper piece (17) that connects respectively again.

5. the Automatic Protection Switching of low-voltage electrical apparatus as claimed in claim 1; it is characterized in that: the tip of described hook solid pressing plate (13) of fixedlying connected with bimetal leaf (12) is by the little hole slot in the middle of the insulating barrier (10), the prominent pearl (15) of the arc of slide block accessory plate (16) bottom surface is hooked or discharged.