CN212695114U

CN212695114U - Adjustable patch type fuse for low-power supply

Info

Publication number: CN212695114U
Application number: CN202021339432.2U
Authority: CN
Inventors: 蒋明明; 刘凤涛
Original assignee: Tangshan Hangyu Electric Power & Electronic Equipment Co ltd
Current assignee: Tangshan Hangyu Electric Power & Electronic Equipment Co ltd
Priority date: 2020-07-09
Filing date: 2020-07-09
Publication date: 2021-03-12
Anticipated expiration: 2030-07-09

Abstract

The utility model relates to a SMD fuse with adjustable be used for miniwatt power. The utility model comprises a shell, a first end face electrode, a second end face electrode, a metal clamping groove, a fuse main body and a movable slotted cover plate; the first end face electrode and the second end face electrode are respectively fixed at the left end and the right end of the bottom of the shell and are completely or partially exposed out of the shell; the metal clamping groove is positioned in the inner cavity of the shell, and two ends of the metal clamping groove are connected with the first end surface electrode and the second end surface electrode; openings are formed in the left end and the right end of the shell, the width of each opening is equal to the diameter of the fuse main body, and the height of each opening enables the metal contact piece of the fuse main body to be in contact with the metal clamping groove; the fuse main part with both ends joint about the shell to activity joint in remove the fluting apron. The utility model discloses can be under the prerequisite of not changing the fuse body, the fusing current of regulation fuse that can be convenient fast.

Description

Adjustable patch type fuse for low-power supply

Technical Field

The utility model relates to a miniwatt power supply circuit protection device technical field, specific paster type fuse that is used for miniwatt power supply adjustable that says so.

Background

With the rapid development of power electronic technology, power electronic equipment has increasingly close relationship with the work and life of people. Electronic equipment cannot be powered on reliably, and low-power supplies can be applied to various occasions. More and more power supplies have very strict requirements on protection circuits, and fuses often restrict the protection and application of low-power supplies.

Fuses, which are commonly used as circuit protection devices, make electrical connections to components of the circuit to be protected. Generally, a fuse has its unique current rating capacity determined by the metal components constituting the fuse. With the development of the electronic industry, the requirements for miniaturization and integration of elements in the field of power supply products are higher and higher, and the volume of a chip type protection element is greatly reduced. Meanwhile, power sources are required regardless of electronic products, intelligent devices, and various power devices in the industrial field. The requirements of small power supplies on miniaturization, reliability and the like of fuses are higher and higher, and particularly in power circuit protection, the fuses need to meet the strict requirements of equipment: the characteristics should be clean and clean, the resistance after breakage is high, the whole fusing process is carried out in the package, the characteristics of suppressing the electric arc should be good, and the electric arc can bear impact and vibration.

The existing patch fuse is still in a stage that one fuse can only be used in a specific power circuit, or when the fuse is burnt out, only another fuse with the same model can be replaced, and the problem brought by the state is that only professionals can replace the fuse, and each replacement is troublesome; meanwhile, as the patch fuse is mostly in a welding type, and the service life of a PCB pad is limited, the PCB of the power circuit is damaged due to heat because of multiple welding; in the initial design stage of a product circuit, various indexes of a power supply need to be tested, and the fusing current of a fuse needs to be adjusted, so that the aim of debugging various states is fulfilled; some fuses also fail to blow properly due to the problem of blowing space. Therefore, research a SMD fuse that is used for miniwatt power supply adjustable under the prerequisite of not changing the fuse body, the fusing current of the regulation fuse that can be convenient fast, perhaps change the fuse that can be timely when the fuse of circuit fuses has important meaning.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned weak point that exists among the prior art, the to-be-solved technical problem of the utility model is to provide a SMD fuse with adjustable be used for miniwatt power supply, under the prerequisite of not changing the fuse body, the fusing current of regulation fuse that can be convenient fast to change the fuse that can be timely when the fuse of circuit fuses

The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: a patch type fuse with adjustable small power supply comprises a shell, a first end surface electrode, a second end surface electrode, a metal clamping groove, a fuse main body and a movable slotted cover plate;

the first end face electrode and the second end face electrode are respectively fixed at the left end and the right end of the bottom of the shell and are completely or partially exposed out of the shell; the metal clamping groove is positioned in the inner cavity of the shell, and two ends of the metal clamping groove are connected with the first end surface electrode and the second end surface electrode; openings are formed in the left end and the right end of the shell, the width of each opening is equal to the diameter of the fuse main body, and the height of each opening enables the metal contact piece of the fuse main body to be in contact with the metal clamping groove; the fuse main part with both ends joint about the shell to activity joint in remove the fluting apron.

The shell comprises an upper substrate, a lower substrate, a left substrate and a right substrate; the upper substrate is connected with the lower substrate, the left end of the connecting structure is connected with the left substrate, and the right end of the connecting structure is connected with the right substrate.

The upper substrate comprises a front cover plate, an upper cover plate and a rear cover plate which are integrally formed; the bottom of front cover plate and back cover plate is connected the infrabasal plate, the left end of front cover plate, upper cover plate and back cover plate is connected the left base plate, and the right end is connected the right base plate.

The inner cavity of the shell is filled with heat-insulating filler.

The metal clamping groove comprises an elastic element and two connecting parts, and the elastic element is connected between the two connecting parts; each connecting portion comprises a metal contact surface, a left metal card and a right metal card, the metal contact surfaces are fixed to the bottom surfaces of the left metal card and the right metal card and used for being connected with the first end surface electrode or the second end surface electrode, the distance between the left metal card and the right metal card is the thickness of the metal contact piece of the fuse main body, two semicircular spherical surfaces are arranged on the opposite sides of the left metal card and the right metal card, and the spherical surfaces are in crossed layout.

The upper parts of the left metal card and the right metal card are of an outward inclined side opening type.

The lower side of the spherical surface at the bottom of the left metal card and the right metal card is provided with a metal conductor, and the metal conductor is flush with the tangent line of the corresponding spherical surface.

The fuse main body comprises a metal contact piece, rotating equipment, an arc extinguishing cavity, a fuse wire and an outer cavity; the two rotating devices are respectively connected to two ends of the arc extinguishing cavity in a sealing manner; the rotating equipment is of a circular structure, and the two opposite ends of the rotating equipment are connected with the metal contact pieces; the metal contact piece is positioned at the position where the rotating equipment is connected with the arc extinguishing cavity; a plurality of fuse wires of the same grade or different grades are connected between two metal contact pieces connected with different rotating equipment, the fuse wires are positioned in the arc extinguishing cavity, and arc extinguishing materials are arranged in the arc extinguishing cavity; the outer cavity is wrapped outside the arc extinguishing cavity.

And two ends of the outer cavity are respectively provided with a groove matched with the opening.

The fuse main part still includes the handle, the handle adopts insulating material, connects rotary equipment for the opposite side of arc extinguishing cavity.

The utility model has the advantages of it is following and beneficial effect:

1. the utility model discloses can be under the prerequisite of not changing the fuse body, the fusing current of regulation fuse that can be convenient fast to change the fuse that can be timely when the fuse of circuit fuses, improved the multiple performance of fuse in the circuit, but the controllability has improved the operating performance, has reduced the research and development degree of difficulty of circuit, has reduced the research and development cost, has guaranteed the reliability of research and development, is favorable to the test and the use of product.

2. The utility model discloses a fuse major structure has realized having a plurality of the same or different fusing currents of a fuse, can select different fusing currents according to the application scenario of reality, has improved the selectivity of fuse.

3. The main body structure of the fuse can be continuously used without replacing the fuse when one fuse is fused, thereby improving the usability of the fuse and increasing the repeatability of the fuse; and the structural integrity of the PCB is ensured without replacing the fuse body, and the service life is prolonged.

4. The utility model discloses an every fuse has independent arc extinguishing cavity, has guaranteed the quick reliable fusing of fuse, has guaranteed the quick response of fuse, has improved the reliability of equipment.

5. The utility model discloses an outer cavity contains every independent arc extinguishing cavity together, the effectual entering that prevents the foreign matter, has guaranteed the performance index of fuse, has prevented the contact of arc extinguishing cavity and other objects, has improved the stability of fuse.

6. The utility model discloses an adopted the structure of fuse metal draw-in groove, there is protruding part on every metal draw-in groove, in the middle of elastic element connects and the metal draw-in groove simultaneously, this structure is favorable to the locking of metal contact piece, has increased the maneuverability of fuse, has guaranteed the effective contact of fuse, has improved the reliability of fuse.

7. The utility model discloses an adopted handle and removed grooved structure, strengthened the practicality of fuse, made easy operation, reliable.

Drawings

FIG. 1 is a schematic view of the overall structure of the fuse of the present invention;

FIG. 2 is a sectional view of the fuse of the present invention;

FIG. 3 is a side view of the fuse of the present invention;

fig. 4 is a schematic view of a metal slot of the present invention;

fig. 5 is a main body structure diagram of the fuse of the present invention.

The fuse structure comprises a fuse body, a fuse cover plate, a movable slotted cover plate, a first end face electrode, a second end face electrode, a metal clamping groove, a fuse body and a movable slotted cover plate, wherein the upper base plate is 1, the lower base plate is 2, the left base plate is 3, the right base plate is 4, the first end face electrode is 5, the second end face electrode is 6, the metal clamping groove is 7, the fuse body.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1-3, an adjustable patch fuse for a low-power supply comprises a housing, a first end surface electrode 5, a second end surface electrode 6, a metal card slot 7, a fuse main body 8 and a movable slotted cover plate 9; wherein, the shell comprises an upper substrate 1, a lower substrate 2, a left substrate 3 and a right substrate 4; the upper substrate 1 is connected with the lower substrate 2, the left end of the connecting structure is connected with the left substrate 3, and the right end of the connecting structure is connected with the right substrate 4. The upper substrate 1 comprises a front cover plate, an upper cover plate and a rear cover plate which are integrally formed; the bottom of front cover plate and back cover plate is connected the infrabasal plate, the left end of front cover plate, upper cover plate and back cover plate is connected the left base plate, and the right end is connected the right base plate. The upper substrate 1, the lower substrate 2, the left substrate 3 and the right substrate 4 are connected together to form a cavity or a cavity with filler. The first end face electrode 5 and the second end face electrode 6 are connected to the front cover plate and a part of the rear cover plate of the upper substrate 1, and are connected to the left substrate 3 and the right substrate 4. The first end face electrode 5 and the second end face electrode 6 can be wrapped outside the cover plate and the substrate or embedded inside the cover plate and the substrate to form a whole with the cover plate and the substrate. The metal clamping groove 7 is connected with the first end surface electrode 5 and the second end surface electrode 6 together and can be wrapped by filler in the cavity, and the filler is a heat insulation material. The fuse body 8 is connected with the left base plate 3 and the right base plate 4, and is movably connected with the movable slotted cover plate 9.

The upper substrate 1 can be formed by cold pressing or hot pressing raw materials into a required contact surface through a forming die with a specific shape, and then is cured and formed; alternatively, the cavity may be formed by etching or machining after the material is cured. A thermally insulating filler may be added to the cavity if desired, the volume of the filler taking into account the path of movement of the fuse body 8. The upper substrate 1 mainly comprises a front cover plate, a rear cover plate and an upper cover plate in the overall schematic diagram of the fuse shown in fig. 1, wherein the front cover plate, the rear cover plate and the upper cover plate form a cavity and wrap three surfaces of a fuse main body 8; or the front cover plate, the rear cover plate and the upper cover plate are formed by three inner wall fillings and are wrapped on three surfaces of the fuse main body 8, but the movable slotted cover plate 9 or the three inner wall fillings of the front cover plate, the rear cover plate and the upper cover plate are ensured to have a slot with the same size as the fuse main body 8, so that the movement of the fuse main body 8 is ensured. The upper substrate 1 mainly protects the fuse main body 8 in a peripheral structure, and prevents other foreign objects from colliding with the fuse main body 8 and affecting the performance and the service life of the fuse.

The lower substrate 2 can be formed by cold pressing or hot pressing the raw materials into a required contact surface through a forming die with a specific shape, and then is cured and formed; or the cavity can be realized by etching or machining after the material is solidified, and if necessary, the cavity can be added with heat-insulating fillers. The lower substrate 2 is mainly a carrier of the first end surface electrode 5 and the second end surface electrode 6 shown in fig. 1, plays a role in fixing and bearing the first end surface electrode 5 and the second end surface electrode 6, and is simultaneously matched with the upper substrate 1 to form a cavity with left and right open surfaces, like the upper substrate 1, only an empty cavity or a cavity with fillers is needed, but an operation space between the lower substrate and the metal clamping groove 7 and the fuse main body 8 is guaranteed, and the fuse main body 8 is guaranteed to move freely.

The left substrate 3 and the right substrate 4 mainly form a cavity together with the upper substrate 1, and form a shell of the fuse together with the lower substrate 2, so that the fuse body 8 and the support are protected. The surfaces of the left substrate 3 and the right substrate 4 are respectively connected with the first end face electrode 5 and the second end face electrode 6, and can be in seamless connection or the end face electrodes are wrapped on the outer surfaces of the left substrate 3 and the right substrate 4. The left base plate 3 and the right base plate 4 need to be opened, the size of the opening is the same as the diameter of the fuse main body 8, meanwhile, the height of the opening is not smaller than the contact distance between the metal contact piece 8-1 and the metal clamping groove 7 in the fuse main body 8, the fuse main body 8 can be guaranteed to rotate smoothly, and meanwhile, the fuse main body 8 is guaranteed to move normally.

The first end face electrode 5 and the second end face electrode 6 are manufactured in the following manner: the method comprises the steps of forming a metal thin layer on an upper substrate 1, a lower substrate 2, a left substrate 3 and a right substrate 4 in a metal copper sheet pressing or sputtering electroplating mode, and etching end face electrodes on the metal thin layer according to the required size, wherein the end face electrodes can be wrapped around the upper substrate 1, the lower substrate 2, the left substrate 3 and the right substrate 4 or embedded on the upper substrate 1, the lower substrate 2, the left substrate 3 and the right substrate 4. The first end face electrode 5 and the second end face electrode 6 are mainly used for welding with a welding pad of a PCB, and the fuse and the PCB can be effectively combined.

As shown in fig. 4, the metal card slot 7 includes an elastic member 7-4 and two connecting portions, and the elastic member is connected between the two connecting portions. The two connecting parts have the same structure and respectively comprise a left metal card 7-1, a metal connecting surface 7-2 and a right metal card 7-3. The metal clamping groove 7 has the main functions of: (1) electrically connected to the first end face electrode 5 and the second end face electrode 6; (2) to contact with the metal contact pieces 8-1 (shown in fig. 5) in the fuse body 8, and to lock. The metal clamping groove 7 ensures the electrical connection of the fuse, improves the reliability of the fuse and ensures the stability of the fuse.

The left metal card 7-1 and the right metal card 7-3 are provided with semicircular spherical surfaces, and meanwhile, the spherical surface at the lowest part is taken as a tangent line, and a contact metal conductor is additionally arranged. The distance between the left metal card 7-1 and the right metal card 7-3 is the thickness of the metal contact sheet 8-1, and the spherical surfaces of the left metal card 7-1 and the right metal card 7-3 are in an intersecting layout. Meanwhile, the upper half parts of the left metal clamping piece 7-1 and the right metal clamping piece 7-3 are in the shape of an oblique side opening and can be cast through a forming die.

The metal contact surface 7-2 is connected with the left metal card 7-1 and the right metal card 7-3 through electroplating or other methods, and is connected with the first end surface electrode 5 and the second end surface electrode 6, so that effective connection is guaranteed.

The elastic element 7-4 is arranged on the side surface of the left metal card 7-1/the right metal card 7-3, so that the metal contact piece 8-1 is guaranteed to be pressed.

As shown in fig. 5, the fuse body 8 includes a metal contact 8-1, a rotating device 8-2, a handle 8-3, an arc extinguishing chamber 8-4, a fuse wire 8-5, and an outer chamber 8-6. The fuse main body 8 mainly ensures the installation of different fusible links or multiple identical fusible links, the installation of metal contact pieces, the installation of arc extinguishing cavities, outer cavities and the like.

The metal contact sheet 8-1 is connected with the fuse wire 8-5 and is positioned at the position where the rotating equipment 8-2 is connected with the arc extinguishing cavity 8-4. The fuse can be provided with 1-N fuses 8-5 with the same level or different levels according to different requirements. The arc extinguishing chamber 8-4 and the rotating equipment 8-2 form a closed connection to enclose the fuse wire 8-5 therein. Meanwhile, arc extinguishing materials are put into the arc extinguishing cavity 8-4. The outer cavity 8-6 is wrapped outside the arc extinguishing cavity 8-4 to form a sealed cavity. Meanwhile, the arc extinguishing cavity 8-4 is connected with the rotating equipment 8-2. The handle 8-3 is cast integrally with the rotating device 8-2, i.e. an insulation extending a distance from the outside of the rotating device 8-2. The above are all insulating and heat insulating materials except the metal contact sheet 8-1 and the fuse wire 8-5. The rotating device 8-2 is marked with a serial number, and the position of the serial number is consistent with the position of the actual contact piece of the fuse wire 8-5, so that the adjustment of the fuse wire 8-5 is facilitated. Meanwhile, the outer cavity 8-6 of the fuse main body 8 is provided with a groove matched with the openings of the left substrate 3 and the right substrate 4, so that the stability of the up-and-down movement of the fuse main body 8 is ensured.

The fuse body realizes that one fuse has a plurality of same or different fusing currents, different fusing currents can be selected according to actual application occasions, and the selectivity of the fuse is improved; the fuse can be continuously used without replacing the fuse when being fused at one position, so that the usability of the fuse is improved, and the repeatability of the fuse is increased; the arc extinguishing cavity ensures that each fuse wire has an independent arc extinguishing cavity, ensures the quick and reliable fusing of the fuse wires, ensures the quick response of the fuse, and improves the reliability of the equipment. The outer cavity contains every independent arc extinguishing cavity together, the effectual entering that prevents the foreign matter has guaranteed the performance index of fuse, has prevented the contact of arc extinguishing cavity with other objects, has improved the stability of fuse.

Fuse main part 8 is mainly by different or the same fuse, through rotatory fuse main part, adjusts different electric currents, when a set of fuse fuses, also can rotatory main part, changes the fuse.

Remove fluting board 9 and mainly make with insulating thermal-insulated softwood material, make into the draw-in groove with the open-ended edge of left base plate 3 and right base plate 4, be favorable to the sealed of fuse main part 8, mainly seal the opening of left base plate 3 and right base plate 4, be used for blocking fuse main part 8 simultaneously, guarantee that the fuse is inside not getting into other objects in the use, guaranteed fuse main part 8 simultaneously and can not remove, the reliability and the stability of fuse have been improved, the security of whole circuit has been guaranteed.

The utility model discloses a processing flow that is used for SMD fuse with adjustable miniwatt power as follows:

(1) processing an upper substrate, a lower substrate, a left substrate and a right substrate;

(2) electroplating or embedding the first end face electrode and the second end face electrode on the upper substrate, the lower substrate, the left substrate and the right substrate;

(3) processing metal clamping grooves, installing the metal clamping grooves on the two end surface electrodes, and fixing;

(4) processing the fuse main body, and clamping a certain metal sheet of the fuse main body into the metal clamping groove;

(5) the upper substrate, the lower substrate, the left substrate and the right substrate are packaged, and corresponding insulating and heat-insulating objects can be added and then sealed.

Claims

1. A patch type fuse with adjustable small power supply is characterized by comprising a shell, a first end surface electrode, a second end surface electrode, a metal clamping groove, a fuse main body and a movable slotted cover plate;

2. The patch fuse of claim 1, wherein the housing comprises an upper substrate, a lower substrate, a left substrate and a right substrate; the upper substrate is connected with the lower substrate, the left end of the connecting structure is connected with the left substrate, and the right end of the connecting structure is connected with the right substrate.

3. The adjustable patch fuse of claim 2, wherein the upper substrate comprises a front cover plate, an upper cover plate and a rear cover plate which are integrally formed; the bottom of front cover plate and back cover plate is connected the infrabasal plate, the left end of front cover plate, upper cover plate and back cover plate is connected the left base plate, and the right end is connected the right base plate.

4. The adjustable patch fuse of claim 1, wherein the internal cavity of the housing is filled with a thermally insulating filler.

5. The adjustable patch fuse of claim 1, wherein the metal card slot comprises an elastic element and two connecting portions, the elastic element is connected between the two connecting portions; each connecting portion comprises a metal contact surface, a left metal card and a right metal card, the metal contact surfaces are fixed to the bottom surfaces of the left metal card and the right metal card and used for being connected with the first end surface electrode or the second end surface electrode, the distance between the left metal card and the right metal card is the thickness of the metal contact piece of the fuse main body, two semicircular spherical surfaces are arranged on the opposite sides of the left metal card and the right metal card, and the spherical surfaces are in crossed layout.

6. The adjustable chip fuse of claim 5, wherein the upper portions of the left and right metal cards are outwardly-inclined side-opened.

7. The patch fuse with the adjustable small power supply as claimed in claim 5, wherein the metal conductors are arranged below the lowest spherical surfaces of the left and right metal cards and are flush with the tangent lines of the corresponding spherical surfaces.

8. The patch fuse of claim 1, wherein the fuse body comprises a metal contact piece, a rotating device, an arc extinguishing chamber, a fuse wire and an outer chamber; the two rotating devices are respectively connected to two ends of the arc extinguishing cavity in a sealing manner; the rotating equipment is of a circular structure, and the two opposite ends of the rotating equipment are connected with the metal contact pieces; the metal contact piece is positioned at the position where the rotating equipment is connected with the arc extinguishing cavity; a plurality of fuse wires of the same grade or different grades are connected between two metal contact pieces connected with different rotating equipment, the fuse wires are positioned in the arc extinguishing cavity, and arc extinguishing materials are arranged in the arc extinguishing cavity; the outer cavity is wrapped outside the arc extinguishing cavity.

9. The patch type fuse of claim 8, wherein two ends of the external cavity are respectively provided with a slot matching with the opening.

10. The patch fuse of claim 8, wherein the fuse body further comprises a handle made of an insulating material and connected to the other side of the rotating device opposite to the arc extinguishing chamber.