CN2076706U

CN2076706U - Switching fuse

Info

Publication number: CN2076706U
Application number: CN 90214927
Authority: CN
Inventors: 薛箭
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-09-17
Filing date: 1990-09-17
Publication date: 1991-05-08

Abstract

The utility model relates to a switching fuse with indications for displaying a fusing state. A plurality of the switching fuses can be combined. The fuse is composed of a fuse body frame, a fuse body, a fuse body seat, etc., and is provided with a switching device, an auxiliary switching device, a locking device and a display device for the fusing state. A switch is provided with a linkage combined mechanism, so that the combined linkage operations of two poles, three poles and even a plurality of poles can be realized. The utility model concentrates a switch, a fuse, the combination thereof, and a display for fusing, and can be used for circuits of from 220V to 500V and loads of any natures. The utility model can replace HK1 fuse type switches below 25A, and RL1... fuses at home and aboard.

Description

Switching fuse

The utility model relates to a kind of switching regulator fuse, particularly relates to a kind of band blown state display unit, the switching regulator fuse of denumerable combination.

Utility model CN87207218U discloses a kind of switching device of built-in fuse, and it can make switch, can play overload and short-circuit protection again and use, and be applicable to the occasion of residential houses or similar applications, but also there are some shortcomings in this structure:

(1) fundamentally do not break away from the outmoded floor plan form of guillotine type switch, erection space is big, and is especially more remarkable when installing and using for many; In addition, it is also inconvenient to change fuse-link, operates more loaded down with trivial detailsly, and mounting means is single.

(2) bad adaptability.In display circuit, adopt light-emitting diode to make the display element device, and seal in the reverse protection element that rectifier diode is made light-emitting diode.Therefore, can only be applicable to the alternating voltage of corresponding certain value for the current-limiting resistor of certain value.Resistor as its given resistance value 82K Ω can only be used for 220 volts circuit, can not satisfy simultaneously in the industrial electric facility of 380V and the circuit thereof and use.Rectifier diode does not possess stabilized voltage characteristic, when being used in inductive load (as motor in refrigerator, washing machine, electric fan, the industrial electrical equipment equipment etc.), can puncture rectifier diode because of the instantaneous overvoltage of overload or short circuit, make display circuit ineffective, make troubles to the fault judgement and the eliminating of electric equipment and facility.Thereby it only is applicable in the resistive load of civilian circuit and uses.

(3) after switch cover is opened; the contact point of fuse is not closed state; after two standby fuse-links damage; the user who lacks electricity consumption general knowledge; easy-to-use sub-standard fuse, copper wire wait and replace using; make the meaning of Fuse switch forfeiture, cause power consumption equipment and facility to use and damage because of its misoperation as overload or short-circuit protection.

The purpose of this utility model is in order to overcome above-mentioned shortcoming, a kind of switching regulator fuse to be provided, particularly a kind of switching regulator fuse with blown state display unit, denumerable combination.This switching regulator fuse is suitable for that voltage range is wideer, load capacity is stronger, not only applicable to civilian but also applicable to using in industrial electrical installation and the circuit.

The utility model is achieved in that the switching regulator fuse, is a kind of protected cut-out, by rotary type melt frame (hereinafter to be referred as the melt frame), and tubular type fuse-link (hereinafter to be referred as fuse-link), left and right melt seat (hereinafter to be referred as the melt seat) is formed.The melt frame is provided with guide groove, cavity, coaxial spill round table surface and lock hole; Fuse-link is loaded in the cavity of melt frame; The melt seat is provided with coaxial convex round table surface, and the melt seat becomes whole by closing-up, is provided with switching device in the melt seat, auxiliary switchgear, locking device and blown state display unit; The melt frame is hinged by coaxial concave-convex round table surface with the melt seat, the melt frame is the center of circle with the hinge, do the rotation at 90 ° of angles with respect to the melt seat, thereby the pipe cap (making moving contact) that makes the fuse-link in the built on stilts chamber of melt causes the motion of " closing " and " branchs " with the sheet clipping type contact of band binding post in being fastened in the melt seat to (do fixed contact to) match switching device of forming, forms opening and breaking of electricity.The top of fixed contact is shaped on arc surface, with the contact area that increases dynamic and static contact, the breaking capacity that improves switching device.In order to improve the breaking capacity of switching device, on the melt seat, be provided with arc-extinguish chamber, arc-extinguish chamber is made of at least two narrow slit type arc-chutes, the direction of arc-chute and horizontal angle α=3 °-15 °.On the melt seat, also be provided with and the corresponding ventilation hole of arc-chute.Because the hot gas that forms in to breaking course at switch contact flows to consistent and matches with ventilation hole with the molten metallic stream that touches, so low-temperature airflow is unimpeded, thereby strengthened the arc extinguishing cooling-down effect, make arc-extinguish chamber have current interruption preferably, arc extinction performance, prolonged contact right useful life, thereby can realize that its switching device operates under band carrier strip spare.When changing fuse-link, melt frame handle is outwards overturn, from cavity, take out fuse-link.Because the switch fixed contact is to being hidden in melt seat middle part, thereby the user is difficult for fuse and copper wire that overlap joint violating the regulations falls short of specifications.Auxiliary switchgear is made of the push rod that reaches by melt frame driving moving linearly elasticity chip auxiliary switch contact, push rod one end is supported on the contact, the other end and melt bridge joint touch, the other end of this contact fixes in the melt seat, and keep in touch with one of fixed contact, an end of another contact fixes in the melt seat, and keeps in touch with printed circuit board (PCB), when push rod drives moving linearly " conducting " fuse-link fusing open circuit by the melt frame, give the power supply of blown state display circuit; When switch disconnected, one of contact of auxiliary switchgear made the blown state display circuit be in " outage " state by resiliency supported " disconnection ", reached complete electricity and isolated, and made when changing fuse-link safer.In order to prevent switching device misoperation in use, improve the security reliability of its use, on melt frame and melt seat, be respectively equipped with the locking device under " logical; disconnected " two states to switching device and auxiliary switchgear, it is by the lock hole on melt frame and the melt seat, lock face on the melt seat and stop pin are formed, the outer face of the lock hole on the melt seat has the circular arc flute, its direction is vertical with axially bored line, lock face and horizontal angle are greater than 75 °, one end of stop pin is made 90 ° bending segment, so that need not any specific purpose tool, just can easily stop pin be taken out from lock hole.When inserting stop pin in the lock hole on melt seat and the melt frame, the melt frame keeps good " electricity connection " state with respect to the locking of melt seat.When stop pin inserts in the lock hole on the melt frame, the melt frame is locked on the lock face of melt seat, keep its " electricity disconnects " state reliably, so that help the maintenance of equipment, improve its security reliability.The blown state display unit, form by fuse-link, current-limiting resistance, demonstration neon lamp, fuse-link is in parallel with the demonstration neon lamp that is in series with current-limiting resistance, current-limiting resistance is welded on the printed circuit board (PCB), be connected with the demonstration neon lamp by insulated conductor, show that neon lamp is installed in the cavity of melt seat, be with Shock-proof sleeve on it.When the melt frame went to the position of " closing ", fuse-link was in the short circuit state, and current in loop flow to right binding post through left binding post, fuse-link, and fusing show circuit no current passes through, and shows that neon lamp is not luminous.On the contrary; when opening a way if fuse-link is in fusing; the fusing show circuit is by protected circuit supply; electric current through left binding post, auxiliary switch contact to, be welded in current-limiting resistance on the printed circuit board (PCB), insulated conductor, demonstration neon lamp to right binding post; show that neon lamp indication starter is luminous this moment; to represent having overload or short trouble in protected circuit or the equipment, be in abnormal condition.Show that neon lamp has stabilized voltage characteristic, by gas luminescence, the current margin broad that is born, the operating voltage excursion of adaptation is bigger, positive-negative half-cycle to alternating current can both be utilized fully, and its performance is more more reliable than adopting light-emitting diode to make the display element device.Thereby when the suitable current-limiting resistance of series connection, make the fusing display unit can not only simultaneous adaptation normal luminous demonstration under the alternating current condition of 220V-500V, also make it can be applicable to resistive, inductive and Combination load behavior simultaneously.Strengthened its load capacity, enlarged accommodation, the reason overvoltage is damaged the display element device, is with Shock-proof sleeve on the demonstration neon lamp, can prevent that again neon lamp from damaging because of unexpected vibration, further improves the useful life and the reliability of the display unit that fuses.For easy to install and use, satisfy the different occasions of installing and using, be provided with mounting structure that guide tracked dovetail groove snaps in and screw hole on the melt seat to fastening mounting structure.Preceding a kind of mounting structure form is used for many even tens occasions of installing side by side, and a kind of mounting structure form in back is convenient to several or use installation separately.Is furnished with the compounded plate that two switching regulator fuses can be combined as a whole at least on the guide groove of melt frame.Compounded plate is inserted in the guide groove on the melt frame, just can be respectively two, three and even several switching regulator fuses be combined as a whole, realize the combination combined operation of two utmost points, three utmost points and even the number utmost points of switch.Melt frame and melt seat are made by arc resistant plastic, have excellent electric insulating energy and heat-resisting arc resistance energy.

The utility model compared with prior art has following advantage:

1, the utlity model has the fuse function of switch of holding concurrently, collection switch, fuse and combination thereof and fusing are shown as one, can be used for replacing the following HK1 Fuse switch of domestic and international 25A, RM10, RC1A, RL1, RL6, RL7, RT14 fuse have wide domestic and international market and development prospect.Table 1 is the utility model and several home products contrast table.

2, circuit structure is simple and reliable, and it is convenient to change fuse-link, simple to operate, and compact conformation, erection space are little, are suitable for the different occasions of installing and using.

3, adaptability is strong, can be applicable to the circuit of 220-500V and the load of any character simultaneously.

4, because switch is provided with corresponding arc-extinguish chamber and ventilation hole, can realize the operation under the band carrier strip spare in a big way.

5,, can realize two utmost points, three utmost points and even the combined operation of the number utmost point of switch because switch has the interlock combining structure.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.But the utility model is not subjected to the restriction of embodiment.

Fig. 1 is the stereogram of the switching regulator fuse that the utility model proposes.

Fig. 2 is the A-A cutaway view of the switching regulator fuse that the utility model proposes.

Fig. 3 is the B-B cutaway view of the switching regulator fuse that the utility model proposes.

Fig. 4 is the circuit theory diagrams of the switching regulator fuse that the utility model proposes.

Fig. 5 is switch gearing combination and " conducting " state locking schematic diagram of the switching regulator fuse that the utility model proposes.

Fig. 6 is " disconnection " state locking schematic diagram of the switch of the switching regulator fuse that the utility model proposes.

The switching regulator fuse, it is a kind of protected cut-out, by rotary type melt frame 1 { hereinafter to be referred as melt frame 1 }, tubular type fuse-link 2 { hereinafter to be referred as fuse-link 2 }, left and right melt seat 3,4 { hereinafter to be referred as melt seat 3,4 } is formed, and melt frame 1 is provided with guide groove 5, cavity 6, coaxial spill round table surface 7,8 and

lock hole

9,10; Fuse-link 2 is loaded in the cavity 6 of melt frame 1;

Melt seat

3,4 is provided with coaxial convex

round table surface

11,12, and

melt seat

3,4 becomes whole by closing-up, is provided with switching device 13, auxiliary switchgear 14, locking device 15 and blown state display unit 16 in the

melt seat

3,4; Melt frame 1 and

melt seat

3,4 by coaxial concave-convex

round table surface

7,11,8,12 are hinged, melt frame 1 is the center of circle with the hinge, with respect to

melt seat

3,4 do the rotation at 90 ° of angles, thereby the pipe cap (making moving contact) that makes the fuse-link 2 in the cavity 6 of melt frame 1 with fix at melt seat 3, the sheet clipping type contact of the band binding post in 4 is to 17,18(do fixed contact to) switching device 13 that forms of matching causes the motion of " closing " and " branch ", form opening of electricity with disconnected, fixed

contact

17,18 top is shaped on arc surface, moving to increase, fixed

contact

17,18 contact area, the breaking capacity of raising switching device 13.In order to improve the breaking capacity of switching device 13, on

melt seat

3,4, be provided with arc-extinguish chamber 19, arc-extinguish chamber 19 is made of at least two narrow slit type arc-chutes, the direction of arc-chute and horizontal angle α=10 °.On

melt seat

3,4, also be provided with and the corresponding ventilation hole of arc-chute.Because the hot gas that forms in to 17,18 breaking courses at the switch fixed contact flows to consistent with the motlten metal particle flux and matches with ventilation hole, so low-temperature airflow is unimpeded, thereby strengthened the arc extinguishing cooling-down effect, make arc-extinguish chamber 19 have current interruption preferably, arc extinction performance, prolonged the useful life of fixed

contact

17,18, thereby can realize that its switching device 13 operates under the carrier strip spare at band.When changing fuse-link 2, the handle of melt frame 1 is outwards overturn, take out fuse-link 2 from cavity 6, because the switch fixed contact is hidden in

melt seat

3,4 middle parts to 17,18, thereby the user is difficult for fuse or copper wire that overlap joint violating the regulations falls short of specifications.Auxiliary switchgear 14 reaches the push rod 22 that drives moving linearly by melt frame 1 by elasticity chip auxiliary switch contact to 20,21 and constitutes, push rod 22 1 ends are supported on the contact 20, the other end contacts with melt frame 1, contact 20 1 ends fix and keep in touch in

melt seat

3,4 and with fixed contact 17, one end of contact 21 fixes in

melt seat

3,4, and keeps in touch with printed circuit board (PCB) 30.When push rod 22 drives moving linearly " conducting ", fuse-link 2 fusing open circuits by melt frame 1, give the power supply of blown state display circuit; When switch disconnected, the contact 20 of auxiliary switchgear 14 made the blown state display circuit be in " outage " state by resiliency supported " disconnection ", reached complete electricity and isolated, and made when changing fuse-link 2 safer.In order to prevent switching device 13 misoperation in use, improve the security reliability of its use, at melt frame 1 and melt seat 3, be respectively equipped with the locking device 15 under " logical; disconnected " two states on 4 to switching device 13 and auxiliary switchgear 14, it is by the lock hole on the

melt frame

19,10, melt seat 3, lock hole 23 on 4,24 and

lock face

25,26 and stop pin 27 constitute, melt seat 3, lock hole 23 on 4,24 outer face has arc-shaped groove, its direction is vertical with axially bored line,

lock face

25,26 with horizontal angle greater than 75 °, one end of stop pin 27 is made 90 ° bending segment, so that need not any specific purpose tool, just can be easily with stop pin 27 from

lock hole

9,23, take out in 24 and 10.When inserting stop pin 27 in the

lock hole

23,24,9 on

melt seats

3,4 and the melt frame 1, melt frame 1 keeps good " electricity connection " state with respect to 3,4 lockings of melt seat.When stop pin 27 inserts in the lock hole 10 that melts on the frame 1, melt frame 1 is locked on the

lock face

25,26 of

melt seat

3,4, keep its " electricity disconnects " state reliably, so that help the maintenance of equipment, improve its security reliability.Blown state display unit 16 is made up of fuse-link 2, current-limiting resistance 28 and demonstration neon lamp 29, and fuse-link 2 is in parallel with the demonstration neon lamp 29 that is in series with current-limiting resistance 28, and current-limiting resistance 28 is welded on the printed circuit board (PCB) 30, is connected with demonstration neon lamp 29 by insulated conductor.Show that neon lamp 29 is installed in the cavity 31 of

melt seat

3,4, be with Shock-proof sleeve 32 on it.When melt frame 1 went to the position of " closing ", fuse-link 2 was in the short circuit state, and current in loop flow to right binding post through left binding post, fuse-link 2, and fusing show circuit no current passes through.Show that neon lamp 29 is not luminous.On the contrary; when opening a way if fuse-link 2 is in fusing; the fusing show circuit is by protected circuit supply; electric current through left binding post, auxiliary switch contact to 17,18, be welded in current-limiting resistance 28 on the printed circuit board (PCB) 30, insulated conductor, demonstration neon lamp 29 to right binding post; show that neon lamp 29 indication starters are luminous this moment; to represent having overload or short trouble in protected circuit or the equipment, be in abnormal condition.For 220V-500V, the switching regulator fuse of 25A and following electric current, current-limiting resistance 28 is selected RJ1W for use, resistance is 240K Ω, and demonstration neon lamp 29 is selected NH1-11 for use, and fuse-link 2 is selected IEC269-1 standard tubular type fuse-link for use, specification is 10.3 * 38, and domestic specification is 10.5 * 38.Be furnished with the compounded plate 33 that three switching regulator fuses are combined as a whole on the guide groove 5 of melt frame 1, in the guide groove 5 on the compounded plate 33 insertion melt framves 1, just three switching regulator fuses can be combined as a whole, realize three utmost points combination combined operation of switch.Be provided with mounting structure that guide tracked dovetail groove snaps in and screw hole on the melt seat to fastening mounting structure, snap in guide tracked dovetail groove here and get final product.Melt frame 1 and melt seat the 3, the 4th are made by arc resistant plastic, have excellent electric insulating can and heat-resisting arc resistance energy.

Claims

1, a kind of switching regulator fuse, it is a kind of protected cut-out, by rotary type melt frame (1) { hereinafter to be referred as melt frame (1) }, tubular type fuse-link (2) { hereinafter to be referred as fuse-link (2) }, left and right melt seat (3,4) hereinafter to be referred as the melt seat (3,4} forms, it is characterized in that:

(1) melt frame (1) is provided with guide groove (5), cavity (6), coaxial spill round table surface (7,8) and lock hole (9,10),

(2) fuse-link (2) is loaded in the cavity (6) of melt frame (1),

(3) melt seat (3,4) is provided with coaxial convex round table surface (11,12), melt seat (3,4) becomes whole by closing-up, be provided with switching device (13), auxiliary switchgear (14), locking device (15) and blown state display unit (16) in the melt seat (3,4)

(4) melt frame (1) is hinged by coaxial concave-convex round table surface (7,11,8,12) with melt seat (3,4), and melt frame (1) is the center of circle with the hinge, does the rotation at 90 ° of angles with respect to melt seat (3,4).

2, switching regulator fuse according to claim 1, it is characterized in that switching device (13) is by moving contact, fixed contact constitutes (17,18) and arc-extinguish chamber (19), moving contact is the pipe cap of fuse-link (2), and fixed contact is to constituting by the sheet clipping type contact that fixes the band binding post in melt seat (3,4) to (17,18).

3, switching regulator fuse according to claim 2 is characterized in that arc-extinguish chamber (19) is made of at least two narrow slit type arc-chutes, the direction of arc-chute and horizontal angle α=and 3 °-15 °.

4,, it is characterized in that the direction of arc-chute and horizontal angle α=10 ° according to claim 2 or 3 described switching regulator fuses.

5, switching regulator fuse according to claim 1, it is characterized in that auxiliary switchgear (14) reaches push rod (22) formation that is driven moving linearly by melt frame (1) by elasticity chip auxiliary switch contact to (20,21), push rod (22) one ends are supported on the contact (20), the other end contacts with melt frame (1), the other end of contact (20) fixes in melt seat (3,4), and keep in touch with fixed contact (17), one end of contact (21) fixes in melt seat (3,4), and keeps in touch with printed circuit board (PCB) (30).

6, switching regulator fuse according to claim 1, it is characterized in that locking device (15) is by the lock hole (9 on the melt frame (1), 10) and melt seat (3,4) lock hole (23 on, 24) and lock face (25,26) and stop pin (27) constitute, lock hole (23,24) outer face has the circular arc flute, its direction is vertical with axially bored line, lock face (25,26) with horizontal angle greater than 75 °, one end of stop pin (27) is made 90 ° bending segment, stop pin (27) is inserted melt seat (3,4) lock hole (23 on, 24) and the lock hole (9) on the melt frame (1) in the time, melt frame (1) is with respect to melt seat (3,4) locking, when the lock hole (10) on stop pin (27) the insertion melt frame (1) is middle, melt frame (1) is locked in melt seat (3,4) lock face (25,26) on.

7, switching regulator fuse according to claim 1, it is characterized in that blown state display unit (16) is by fuse-link (2), current-limiting resistance (28) with show that neon lamp (29) forms, fuse-link (2) is in parallel with the demonstration neon lamp (29) that is in series with current-limiting resistance (28), current-limiting resistance (28) is welded on the printed circuit board (PCB) (30), be connected with showing neon lamp (29) by insulated conductor, show that neon lamp (29) is installed in the cavity (31) of melt seat (3,4), is with Shock-proof sleeve (32) on it.

8, according to claim 1 or 7 described switching regulator fuses, it is characterized in that switching regulator fuse for 220V-500V, 25A and following electric current, current-limiting resistance (28) is selected RJ1W for use, resistance is 240K Ω, demonstration neon lamp (29) is selected NH1-11 for use, fuse-link (2) is selected IEC269-1 standard tubular type fuse-link for use, and specification is 10.3 * 38, and domestic specification is 10.5 * 38.

9, switching regulator fuse according to claim 1 is characterized in that being furnished with the compounded plate (33) that two switching regulator fuses can be combined as a whole at least on the guide groove (5) of melt frame (1).

10, switching regulator fuse according to claim 1 is characterized in that melt frame (1) and melt seat (3,4) made by arc resistant plastic.