CN107123580B - Anti-lightning chip type protection element and manufacturing method thereof - Google Patents
Anti-lightning chip type protection element and manufacturing method thereof Download PDFInfo
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- CN107123580B CN107123580B CN201710431427.0A CN201710431427A CN107123580B CN 107123580 B CN107123580 B CN 107123580B CN 201710431427 A CN201710431427 A CN 201710431427A CN 107123580 B CN107123580 B CN 107123580B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
- H01H85/0411—Miniature fuses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
- H01H69/02—Manufacture of fuses
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/055—Fusible members
- H01H85/12—Two or more separate fusible members in parallel
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/05—Component parts thereof
- H01H85/18—Casing fillings, e.g. powder
- H01H85/185—Insulating members for supporting fusible elements inside a casing, e.g. for helically wound fusible elements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
- H01H85/02—Details
- H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
- H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
- H01H85/0411—Miniature fuses
- H01H2085/0412—Miniature fuses specially adapted for being mounted on a printed circuit board
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- Fuses (AREA)
Abstract
The invention discloses a chip type protective element for resisting lightning stroke, which comprises an upper cover plate, a lower cover plate, a bearing plate and two fuses, wherein the bearing plate is clamped between the upper cover plate and the lower cover plate; the middle of the bearing plate is provided with a transversely extending baffle for blocking the mutual influence of impact force when two fuses blow up, the protective element is divided into two cavities by the baffle, the effect of suspending the fuses can still be achieved, and the lightning surge resistance and the breaking capacity of the protective element are greatly improved in a small volume.
Description
Technical Field
The present invention relates to a protection element, and more particularly to a chip-type protection element having a small size and a high lightning surge resistance, and a method for manufacturing the protection element.
Background
The protection element is widely applied to the circuit board of the electronic product to provide the overcurrent protection at present, and along with the continuous multifunctionalization and miniaturization of the electronic product, the requirements of miniaturization, thinning and high safety performance are also put forward for each electronic element on the circuit board. The surge resistance of the protection element needs to be improved simultaneously in a small volume, and chinese patent 201110428907.4 provides a suspended fuse type surface-mount fuse, wherein a fuse wire is respectively arranged above and below a middle cavity plate, the two fuse wires are connected in parallel to improve the surge resistance of the protection element, and the suspension design of the fuse wire can ensure the breaking capacity of the protection element. However, the above prior art has a problem that the cavities in the protection element are entirely communicated, and there is no barrier between the upper and lower fuses, so that when a breaking test is performed, an impact force generated by the burst of one fuse will break the other fuse, resulting in an insignificant improvement in breaking capacity, and if the upper fuse is blown first, a metal liquid dropped will contaminate the lower fuse.
In view of the above, a new technical solution is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a wafer type anti-lightning protection element, which can prevent two parallel fuses from influencing each other when the two parallel fuses are fused when a scheme of parallel fuses is adopted so as to improve the anti-lightning surge capacity and the breaking capacity of the protection element.
Meanwhile, the invention also provides a manufacturing method of the anti-lightning chip type protection element.
In order to achieve the above object, the chip-type protection device for preventing lightning strike provided by the present invention can adopt the following technical scheme:
a chip-type protection element for preventing lightning strike comprises an upper cover plate, a lower cover plate, a bearing plate clamped between the upper cover plate and the lower cover plate, an upper fuse wire borne on the upper surface of the bearing plate, and a lower fuse wire borne on the lower surface of the bearing plate; the fuse wire comprises a bearing plate and is characterized in that a partition baffle extending transversely is arranged in the middle of the bearing plate, an upper groove is concavely arranged in the middle of the bearing plate from the upper surface to the lower surface, a lower groove is concavely arranged in the middle of the bearing plate from the lower surface to the upper surface, the partition baffle partitions the upper groove and the lower groove into independent spaces, the middle part of an upper fuse wire is suspended in the upper groove, and the middle part of a lower fuse wire is suspended in the lower groove.
Has the advantages that: compared with the prior art, the anti-lightning chip-type protection element has the advantages that the separation baffle is arranged in the cavity between the two fuses and used for separating the mutual influence of impact force when the two fuses are exploded, the separation baffle divides the protection element into the two cavities, the suspension effect of the fuses can still be achieved, and the anti-lightning surge capacity and the breaking capacity of the protection element are greatly improved in a small volume.
The two ends of the upper cover plate are provided with upper blind holes, the bottom of each upper blind hole is the upper surface of the bearing plate, and the two ends of each upper fuse wire are respectively exposed in the upper blind holes; lower blind holes are formed in two ends of the lower cover plate, the top surfaces of the lower blind holes are the lower surfaces of the bearing plates, and two ends of the lower fuse wire are exposed in the lower blind holes respectively.
Furthermore, the upper blind hole and the lower blind hole are triangular blind holes, and the tips of the triangles face the center of the protection element. Wherein the tip of the triangle (the end towards the center of the protection element) creates a tip effect where the plated layer is thicker, here the critical part where the plated layer joins the fuse, the thicker plated layer making the electrode and fuse electrically better connected.
Furthermore, the inner side surface of the upper blind hole is an upper electrode surface; the inner side surface of the lower blind hole is a lower electrode surface, and electroplated layers are laid on the upper surfaces of the two sides of the upper cover plate, the upper electrode surface, the end surface of the bearing plate, the lower surfaces of the two sides of the lower cover plate and the lower electrode surface. The plated layer can form a good electrical connection with the fuse.
Furthermore, one of the upper fuse and the lower fuse is a fast-breaking fuse, and the other one is a slow-breaking fuse, wherein the effective internal resistance of the fast-breaking fuse is greater than that of the slow-breaking fuse. The two types of fuses have the advantages that when the protection element normally operates in a circuit, current preferably passes through the slow-breaking fuse, a small amount of current passes through the fast-breaking fuse, but when the protection element bears lightning surge, the two fuses share the same time, after enough surge impact, one fuse of the fast-breaking fuse has high aging degree and is firstly fused, the protection element is not disconnected at the moment, the current still passes through one fuse of the slow-breaking fuse, the protection element can be used for a period of time, and the service life of the protection element is prolonged.
Further, arc extinguishing materials are filled in the upper groove and the lower groove.
Furthermore, two ends of the upper surface of the bearing plate are provided with upper wire embedding grooves for accommodating upper fuses, and two ends of the lower surface of the bearing plate are provided with lower wire embedding grooves for accommodating lower fuses.
Furthermore, the upper fuse wire is provided with two upper fuse wires, the lower fuse wire is provided with two lower fuse wires, and a transversely extending separation baffle is arranged between the two upper fuse wires and the two lower fuse wires; an upper partition plate extending longitudinally is arranged between the two fuses, and a lower partition plate extending longitudinally is arranged between the two lower fuses. The technical scheme of the increase shows that when the upper fuse wire and the lower fuse wire are provided with a plurality of fuse wires, each fuse wire is isolated from each other by increasing the mode of the upper baffle plate and the lower baffle plate which extend longitudinally, so that the mutual influence of impact force during fuse wire explosion is reduced when the fuse wires are arranged.
Furthermore, the upper baffle extends downwards from the lower surface of the upper cover plate; the lower baffle plate extends upwards from the upper surface of the lower cover plate.
The method for manufacturing the lightning strike resistant wafer type protective element can adopt the following technical scheme, and comprises the following steps:
(1) dividing an insulating material flat plate into a plurality of upper cover plates, and manufacturing electrode surface patterns on the upper cover plates according to requirements; dividing an insulating material flat plate into a plurality of lower cover plates, and manufacturing electrode surface patterns on the lower cover plates according to requirements;
(2) dividing an insulating material flat plate into a plurality of bearing plates, processing wire embedding grooves on two sides of a bearing plate array to be positioned at the longitudinal center line of each bearing plate unit, processing upper grooves and lower grooves on two sides of the bearing plate array with the wire embedding grooves processed, and forming a separation baffle between the upper grooves and the lower grooves;
(3) arranging fuses in the wire embedding grooves on the two sides of the bearing plate array, adding an adhesive to the unsettled part of the fuse to fix the fuse in the wire embedding grooves, and bonding the upper and lower cover plate arrays on the two sides of the bearing plate array to enable each upper cover plate unit and each lower cover plate unit to correspond to one bearing plate unit;
(4) and cutting the protection element array into protection element rows according to the longitudinal simulation cutting line, electroplating electrode areas at two ends of the rows, and cutting the protection element rows into single protection element finished products according to the transverse simulation cutting line.
The manufacturing method has the advantages that the upper cover plate unit and the lower cover plate unit are respectively manufactured and then combined with the bearing plate array for manufacturing the bearing plate unit, and then the bearing plate array is uniformly cut, so that the finished products of all elements have the same specification and uniform performance, and the manufacturing efficiency is improved.
The invention also provides another lightning-strike-resistant wafer type protection element which can adopt the following technical scheme:
a chip-type protection element for preventing lightning strike comprises an upper cover plate, a lower cover plate, a bearing plate group clamped between the upper cover plate and the lower cover plate, an upper fuse wire and a lower fuse wire; the bearing plate group is provided with a baffle plate in the middle, a first upper bearing plate on the baffle plate, a second upper bearing plate on the first upper bearing plate, a first lower bearing plate under the baffle plate and a second lower bearing plate under the first lower bearing plate, wherein the second upper bearing plate is clamped between the upper cover plate and the first upper bearing plate, and the second lower bearing plate is clamped between the lower cover plate and the first lower bearing plate; the middle of the first upper bearing plate is provided with a hollow first opening, the middle of the second upper bearing plate is provided with a hollow second opening communicated with the first opening, the middle of the first lower bearing plate is provided with a hollow third opening, and the middle of the second lower bearing plate is provided with a hollow fourth opening communicated with the third opening; the upper fuse is clamped between the first upper bearing plate and the second upper bearing plate, and the middle part of the upper fuse is suspended between the first opening and the second opening; the lower fuse is clamped between the first lower bearing plate and the second lower bearing plate, and the middle part of the lower fuse is suspended between the third opening and the fourth opening.
Has the advantages that: compared with the prior art, the anti-lightning chip-type protection element has the advantages that the separation baffle is arranged in the cavity between the two fuses and used for separating the mutual influence of impact force when the two fuses are exploded, the separation baffle divides the protection element into the two cavities, the suspension effect of the fuses can still be achieved, and the anti-lightning surge capacity and the breaking capacity of the protection element are greatly improved in a small volume.
Furthermore, the upper cover plate and two ends of the second upper bearing plate are provided with upper blind holes together, the bottom of each upper blind hole is the upper surface of the first upper bearing plate, and two ends of each upper fuse wire are exposed in the upper blind holes respectively; the lower cover plate and the two ends of the second lower bearing plate are jointly provided with lower blind holes, the top surfaces of the lower blind holes are the lower surfaces of the bearing plates, and the two ends of the lower fuse wire are respectively exposed in the lower blind holes.
Furthermore, the upper blind hole and the lower blind hole are triangular blind holes, and the tips of the triangles face the center of the protection element.
Furthermore, the inner side surface of the upper blind hole is an upper electrode surface; the inner side surface of the lower blind hole is a lower electrode surface, and electroplated layers are laid on the upper surfaces of the two sides of the upper cover plate, the upper electrode surfaces, the end surfaces of the first upper bearing plate, the lower surfaces of the two sides of the lower cover plate, the lower electrode surfaces, the end surfaces of the first lower bearing plate and the end surfaces of the partition plates.
Furthermore, one of the upper fuse and the lower fuse is a fast-breaking fuse, and the other is a slow-breaking fuse, i.e. the fast-breaking fuse is thinner than the slow-breaking fuse in the line diameter of the fast-breaking fuse, and the effective internal resistance of the fast-breaking fuse is greater than that of the slow-breaking fuse.
Drawings
FIG. 1 is a schematic view of a solid cover plate according to the present invention.
FIG. 2 is a schematic view of a carrier plate according to a first embodiment of the invention.
Fig. 3 is a perspective view of a protection device according to a first embodiment of the present invention.
FIG. 4 is a schematic diagram of an array of upper and lower cover plates according to a second embodiment of the present invention.
FIG. 5 is a schematic view of a carrier array according to a second embodiment of the invention.
Fig. 6 is a schematic view of a cavity plate according to a third embodiment of the present invention.
Fig. 7 is a perspective view of a protection device according to a third embodiment of the present invention.
Fig. 8 is a perspective view of a protection device according to a fourth embodiment of the present invention.
FIG. 9 is a diagram illustrating a carrier plate according to a fourth embodiment of the present invention.
FIG. 10 is a schematic view of the upper and lower cover plates and the carrier plate according to the fourth embodiment of the present invention.
Detailed Description
For the purpose of illustrating the technical solutions and technical objects of the present invention, the following detailed descriptions of the products of the present invention are provided with reference to the accompanying drawings and examples.
The first embodiment is as follows:
referring to fig. 1 to fig. 3, a wafer-type protection device for preventing a lightning strike according to an embodiment of the disclosure includes:
(1) the upper cover plate 11: as shown in fig. 1, a solid plate.
(2) Bearing plate 2: as shown in fig. 2, an opening 5 is formed in the middle of the plate, and the through hole can be in a circular shape, an oval shape, a square shape, or a combination of the above shapes; the upper surface and the lower surface of the bearing plate are both provided with wire embedding grooves 4, and the wire embedding grooves are arranged on two sides of the through hole and are communicated with the through hole and a groove on the outer side edge of the bearing plate; the through hole of the bearing plate is provided with a baffle 6 in the middle of the thickness direction, and the baffle 6 has the same size as the opening 5 and is smaller than the thickness of the opening 5; the baffle 6 can be made of the same material as the bearing plate or different materials, the baffle 6 can be integrally formed with the bearing plate, and the baffle can also be adhered to the middle of the opening 5 after the opening 5 is processed on the bearing plate.
(3) Two fuses 3: two ends of the fuse wire are placed in the wire embedding groove 4 of the bearing plate and fixed in the wire embedding groove 4 through adhesive, and the middle of the fuse wire is suspended in the through hole. The fuse wire can be a metal wire material or a metal sheet, and can also be formed by a metal wire wound on an insulator; the two fuses may be of the same material and shape or of different materials and shapes.
(4) Lower cover plate 12: as shown in fig. 1, a solid plate; the upper and lower cover plates and the carrier plate are made of a polymeric material, preferably a thermoplastic or thermoset.
(5) An electrode: and (3) placing the two ends of the finished product of the protection element, namely the finished product of the protection element as shown in fig. 3, sequentially overlapping the upper cover plate 11, the bearing plate 2 and the lower cover plate 12, and bonding and fixing the two together through an adhesive, wherein electrode surfaces 7 which are easily electrically connected with the circuit board bonding pads through solder paste are processed on the two sides of the finished product. Plating layers 9 are provided on portions of the upper and lower cover plates of the protection element near both ends, on the electrode surfaces, on both end surfaces of the carrier plate, and the like, and the plating layers 9 are electrically connected to the fuse 3 well.
The electrode surface 7 can be a triangular concave surface which penetrates through the upper cover plate, the lower cover plate and the bearing plate; or the upper and lower cover plates are processed into triangular concave surfaces, the bearing plate is not processed to form triangular blind holes, and two ends of the fuse wire 3 are arranged at the bottoms of the blind holes; or the upper and lower cover plates are shorter and the bearing plate is longer, and the upper and lower cover plates and the bearing plate form a step surface; the triangular concave surface may be replaced with a semicircular shape, a trapezoidal shape, a square shape, etc., and it is preferable to use a triangular shape whose tip (end toward the center of the protective member) generates a tip effect when the plating layer 9 is formed, and at which the plating layer is thicker, which is a critical portion where the plating layer is combined with the fuse, and the thicker plating layer makes the electrical connection between the electrode and the fuse better.
According to the technical scheme, the two fuses are arranged in parallel, the protection element can bear multiple times of normal lightning surge in normal circuit environment use, the two fuses share the surge current at the same time, the reliability is higher than that of one fuse which bears the same surge current, and the aging degree is lower than that of the protection element with one fuse after the protection element bears multiple surge impacts. The preferred scheme is that one of the two fuses is of a fast breaking type, and the other one of the two fuses is of a slow breaking type, so that the required effect can be achieved by changing the materials, components, wire diameters, shapes and other modes of the fuses. For example, the fast-break fuse is made of an alloy material such as iron or nickel having a low melting point or high internal resistance, and the slow-break fuse is made of an alloy material such as copper or silver having a high melting point or low internal resistance. Taking the two fuses as an example, the two fuses are both straight lines, the materials and the components are the same, the wire diameter of the fast-breaking fuse is smaller, the effective internal resistance is larger (the resistance of the part of the fuse suspended in the cavity is the effective internal resistance), the wire diameter of the slow-breaking fuse is thicker, and the effective internal resistance is smaller. When the protection element normally operates in a circuit, current preferably passes through the slow-breaking fuse, a small amount of current passes through the fast-breaking fuse, but when the protection element bears lightning surge, two fuses share at the same time, after enough surge impact, one fuse of the fast-breaking fuse has high aging degree and is firstly fused, the protection element is not disconnected, the current still passes through one fuse of the slow-breaking fuse, the protection element can be continuously used for a period of time, and the service life of the protection element is prolonged.
When fault current passes through or is subjected to breaking test, the protection element must be thoroughly broken without arc discharge and residual resistance, and the fuse wire is suspended in the cavity, so that the product has enough space to disperse impact force when encountering breaking current, and higher breaking capacity can be achieved. In order to further improve the breaking capacity, arc extinguishing materials can be filled in the cavity. In the embodiment, two fuses of the protection element bear huge current impact at the same time, the current impact blasting force is smaller than that borne by one fuse, and the partition plate is arranged, so that the impact force between the two fuses does not influence each other, at the moment, the fast-breaking fuse explodes first, the other slow-breaking fuse cannot be exploded due to the partition plate, and then the slow-breaking fuse is also quickly broken, namely, the explosion impact force of one fuse is divided into two time periods, each fuse bears a part of impact force, and the anti-explosion capability is improved. If one fuse wire explodes and simultaneously blows the other fuse wire according to the scheme without the partition plate in the prior art, the breaking capacity cannot be improved, and if one fuse wire located at the upper geographical position is blown first, metal drops formed by high-temperature melting fall onto the lower fuse wire, so that the fusing performance among the protective elements is inconsistent.
Example two
The second embodiment is a manufacturing method of the protection device product in the first embodiment, taking the manufacturing method of the finished product in fig. 3 as an example, and referring to fig. 4 and 5, the technical solution of the manufacturing method includes the following steps:
(1) manufacturing an upper cover plate array and a lower cover plate array: as shown in fig. 4, a large flat plate of an insulating material, preferably FR-4 epoxy resin, BT resin, polyimide, cyanate ester, or polytetrafluoroethylene, which has excellent flame resistance and is easy to process, is taken, and broken lines in the drawing are vertical and horizontal simulated cutting lines, and divided into a plurality of upper/cover units 1, and electrode surface patterns 7 are formed on the upper/cover units as required.
(2) Manufacturing a bearing plate array: as shown in fig. 5, a large flat plate of insulating material is selected, preferably FR-4 epoxy resin, BT resin, polyimide, cyanate ester or polytetrafluoroethylene which has excellent flame resistance and is easy to process, the dotted line in the figure is a longitudinal and transverse simulated cutting line, and is divided into a plurality of bearing plate units 2, a buried line groove 4 is processed on both sides of the bearing plate array and is located at the longitudinal center line of each bearing plate unit, blind holes 5 are processed on both sides of the bearing plate array on which the buried line groove is processed, and a thin piece is left between the bottoms of the blind holes 5 on both sides to serve as a baffle 6.
In this step, an opening 5 may also be processed on the carrier plate array where the wire embedding groove is processed, a baffle 6 having the same shape and size as the through hole is disposed in the opening 5, and the baffle 6 may be made of the same material as the carrier plate and the cover plate, or may be made of a ceramic material with higher hardness, or may be made of a material such as polyamide with better arc extinguishing function.
(3) Adhesive protection element array: arranging a whole long fuse in the wire embedding grooves on the two sides of the bearing plate array, adding an adhesive to fix the unsettled part of the fuse in the wire embedding grooves, and bonding the upper and lower cover plate arrays on the two sides of the bearing plate array, so that each cover plate unit 1 corresponds to each bearing plate unit 2.
(4) Cutting: and cutting the protection element array into protection element rows according to a longitudinal simulation cutting line, electroplating electrode areas 9 at two ends of the protection element rows, and cutting the protection element rows into single protection element finished products according to a transverse simulation cutting line.
Example three:
as shown in fig. 7, the protection device of the present embodiment includes 7 layers of boards, and unlike the first embodiment, the fuse is suspended without providing the wire-embedding groove, but two surfaces of two fuses are respectively disposed with a layer of cavity board 6 as shown in fig. 6 to achieve the effect of suspension. The protective element of the embodiment comprises an upper cover plate 11, a lower cover plate 12 and a bearing plate group which are bonded together, wherein the bearing plate group comprises: the fuse wire structure comprises a first upper cavity plate 81, a second upper cavity plate 82, a baffle plate 6, a first lower cavity plate 83 and a second lower cavity plate 84, wherein an upper fuse wire is arranged between the first upper cavity plate 81 and the second upper cavity plate 82, a lower fuse wire is arranged between the first lower cavity plate 83 and the second lower cavity plate 84, an opening is formed in the middle of each cavity plate, and the upper cover plate 11, the lower cover plate 12 and the baffle plate 6 are solid plates. The middle of the first upper bearing plate is provided with a hollow first opening, the middle of the second upper bearing plate is provided with a hollow second opening communicated with the first opening, the middle of the first lower bearing plate is provided with a hollow third opening, and the middle of the second lower bearing plate is provided with a hollow fourth opening communicated with the third opening; the upper fuse is clamped between the first upper bearing plate and the second upper bearing plate, and the middle part of the upper fuse is suspended between the first opening and the second opening; the lower fuse is clamped between the first lower bearing plate and the second lower bearing plate, and the middle part of the lower fuse is suspended between the third opening and the fourth opening. As shown in fig. 6, the first upper loading plate, the second upper loading plate, the first lower loading plate and the second lower loading plate in this embodiment have the same structure, and may all be the structure of the loading plate 8 in fig. 6, and the loading plate 8 has the opening 5.
The electrode surface 7 can be a triangular concave surface penetrating through the 7 layers of plates; or the upper cover plate, the lower cover plate, the first cavity plate and the fourth cavity plate are processed into triangular concave surfaces, the second cavity plate, the third cavity plate and the baffle are not processed to form triangular blind holes, and two ends of the fuse wire 3 are arranged at the bottoms of the blind holes; or forming a step surface; the triangular concave surface may be replaced by a semicircle, a trapezoid, a square, etc., and a triangle is preferably used.
Plating layers 9 are provided on portions near both ends of the upper and lower surfaces of the protection element, and portions on both end surfaces, etc., and the plating layers 9 are electrically connected to the two fuses 3 in a satisfactory manner.
In order to further improve the breaking capacity, arc extinguishing materials can be filled in the through holes of the cavity plate.
The upper cover plate, the lower cover plate and the baffle plate are preferably made of materials such as FR-4 epoxy resin, BT resin, polyimide, cyanate ester or polytetrafluoroethylene which have excellent flame resistance and are easy to process.
On the basis of the invention, two longitudinal fuses can be changed into a plurality of longitudinal fuses, and the number of the bearing plate, the cavity plate and the baffle plate is correspondingly increased, so that the effect of the invention can be achieved.
Example four:
as shown in fig. 8 to 9, the embodiment is different from the first embodiment in that there are 4 fuses, including two upper fuses 31 supported on the upper surface of the carrier 22 and arranged in parallel, and two lower fuses 32 supported on the lower surface of the carrier 22 and arranged in parallel. Correspondingly, two wire embedding grooves 4 are transversely arranged on both sides of the bearing plate 22, and an upper baffle plate 62, a lower baffle plate 63 and a transverse baffle plate 61 are longitudinally arranged in the through hole of the bearing plate. The baffles 61, 62, 63 may be directly disposed in the carrier plate as shown in fig. 9, or may be elongated protrusions 62, 63 (i.e. upper and lower baffles 62, 63) protruding from the middle of the upper and lower cover plates 11, 12 as shown in fig. 10, and the two opposite protrusions 62, 63 abut against each other to form a longitudinal baffle. The cross-section separating baffle is composed of longitudinal and transverse separating baffles 61, 62 and 63, and the four fuses are separated in four spaces and respectively suspended.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention. All the components not specified in the present embodiment can be realized by the prior art.
Claims (14)
1. A chip-type protective element against lightning strikes, characterized in that: the fuse wire fuse comprises an upper cover plate, a lower cover plate, a bearing plate clamped between the upper cover plate and the lower cover plate, an upper fuse wire borne on the upper surface of the bearing plate, and a lower fuse wire borne on the lower surface of the bearing plate; the middle of the bearing plate is provided with a transversely extending baffle, the middle of the bearing plate is provided with an upper groove which is concave downwards from the upper surface, the middle of the bearing plate is provided with a lower groove which is concave upwards from the lower surface, the upper groove and the lower groove are separated into independent spaces by the baffle, the middle part of the upper fuse is suspended in the upper groove, and the middle part of the lower fuse is suspended in the lower groove; arc extinguishing materials are filled in the upper groove and the lower groove.
2. The wafer type protective element against lightning stroke according to claim 1, characterized in that: the two ends of the upper cover plate are provided with upper blind holes, the bottom of each upper blind hole is the upper surface of the bearing plate, and the two ends of each upper fuse wire are respectively exposed in the upper blind holes; lower blind holes are formed in two ends of the lower cover plate, the top surfaces of the lower blind holes are the lower surfaces of the bearing plates, and two ends of the lower fuse wire are exposed in the lower blind holes respectively.
3. The wafer type protective element against lightning stroke according to claim 2, characterized in that: the upper blind hole and the lower blind hole are triangular blind holes, and the tips of the triangles face to the center of the protection element.
4. A wafer-type lightning-resistant protective element according to claim 2 or 3, characterized in that: the inner side surface of the upper blind hole is an upper electrode surface; the inner side surface of the lower blind hole is a lower electrode surface, and electroplated layers are laid on the upper surfaces of the two sides of the upper cover plate, the upper electrode surface, the end surface of the bearing plate, the lower surfaces of the two sides of the lower cover plate and the lower electrode surface.
5. The wafer type protective element against lightning stroke according to claim 1, characterized in that: one of the upper fuse and the lower fuse is a fast-breaking fuse, and the other one is a slow-breaking fuse, and the effective internal resistance of the fast-breaking fuse is larger than that of the slow-breaking fuse.
6. The wafer type protective element against lightning stroke according to claim 1, characterized in that: the fuse wire device comprises a bearing plate and is characterized in that upper wire embedding grooves for containing upper fuse wires are formed in two ends of the upper surface of the bearing plate, and lower wire embedding grooves for containing lower fuse wires are formed in two ends of the lower surface of the bearing plate.
7. The wafer type protective element against lightning stroke according to claim 1, characterized in that: the upper fuse wire is provided with two upper fuse wires, the lower fuse wire is provided with two lower fuse wires, and a transversely extending partition plate is arranged between the two upper fuse wires and the two lower fuse wires; an upper partition plate extending longitudinally is arranged between the two upper fuses, and a lower partition plate extending longitudinally is arranged between the two lower fuses.
8. The wafer type protective element against lightning stroke according to claim 7, characterized in that: the upper baffle extends downwards from the lower surface of the upper cover plate; the lower baffle plate extends upwards from the upper surface of the lower cover plate.
9. The method for manufacturing a wafer-type lightning protection element according to any one of claims 1 to 8, comprising the steps of:
(1) dividing an insulating material flat plate into a plurality of upper cover plates, and manufacturing electrode surface patterns on the upper cover plates according to requirements;
dividing an insulating material flat plate into a plurality of lower cover plates, and manufacturing electrode surface patterns on the lower cover plates according to requirements;
(2) dividing an insulating material flat plate into a plurality of bearing plates, processing wire embedding grooves on two sides of a bearing plate array to be positioned at the longitudinal center line of each bearing plate unit, processing upper grooves and lower grooves on two sides of the bearing plate array with the wire embedding grooves processed, and forming a separation baffle between the upper grooves and the lower grooves;
(3) arranging fuses in the wire embedding grooves on the two sides of the bearing plate array, adding an adhesive to the unsettled part of the fuse to fix the fuse in the wire embedding grooves, and bonding the upper and lower cover plate arrays on the two sides of the bearing plate array to enable each upper cover plate unit and each lower cover plate unit to correspond to one bearing plate unit;
(4) and cutting the protection element array into protection element rows according to the longitudinal simulation cutting line, electroplating electrode areas at two ends of the rows, and cutting the protection element rows into single protection elements according to the transverse simulation cutting line.
10. A chip-type protective element against lightning strikes, characterized in that: comprises an upper cover plate, a lower cover plate, a bearing plate group clamped between the upper cover plate and the lower cover plate, an upper fuse wire and a lower fuse wire; the bearing plate group is provided with a baffle plate in the middle, a first upper bearing plate on the baffle plate, a second upper bearing plate on the first upper bearing plate, a first lower bearing plate under the baffle plate and a second lower bearing plate under the first lower bearing plate, wherein the second upper bearing plate is clamped between the upper cover plate and the first upper bearing plate, and the second lower bearing plate is clamped between the lower cover plate and the first lower bearing plate; the middle of the first upper bearing plate is provided with a hollow first opening, the middle of the second upper bearing plate is provided with a hollow second opening communicated with the first opening, the middle of the first lower bearing plate is provided with a hollow third opening, and the middle of the second lower bearing plate is provided with a hollow fourth opening communicated with the third opening; the upper fuse is clamped between the first upper bearing plate and the second upper bearing plate, and the middle part of the upper fuse is suspended between the first opening and the second opening; the lower fuse is clamped between the first lower bearing plate and the second lower bearing plate, and the middle part of the lower fuse is suspended between the third opening and the fourth opening; arc extinguishing materials are filled in the first opening and the second opening, and arc extinguishing materials are filled in the third opening and the fourth opening.
11. A wafer-type lightning-resistant protective element according to claim 10, characterized in that: the upper cover plate and two ends of the second upper bearing plate are provided with upper blind holes together, the bottom of each upper blind hole is the upper surface of the first upper bearing plate, and two ends of each upper fuse wire are exposed in the upper blind holes respectively; the lower cover plate and the two ends of the second lower bearing plate are jointly provided with lower blind holes, the top surfaces of the lower blind holes are the lower surfaces of the bearing plates, and the two ends of the lower fuse wire are respectively exposed in the lower blind holes.
12. A wafer-type lightning-resistant protective element according to claim 11, characterized in that: the upper blind hole and the lower blind hole are triangular blind holes, and the tips of the triangles face to the center of the protection element.
13. A wafer-type lightning-resistant protective element according to claim 11 or 12, characterized in that: the inner side surface of the upper blind hole is an upper electrode surface; the inner side surface of the lower blind hole is a lower electrode surface, and electroplated layers are laid on the upper surfaces of the two sides of the upper cover plate, the upper electrode surfaces, the end surfaces of the first upper bearing plate, the lower surfaces of the two sides of the lower cover plate, the lower electrode surfaces, the end surfaces of the first lower bearing plate and the end surfaces of the partition plates.
14. A wafer-type lightning-resistant protective element according to claim 11, characterized in that: one of the upper fuse and the lower fuse is a fast-breaking fuse, and the other one is a slow-breaking fuse, and the effective internal resistance of the fast-breaking fuse is larger than that of the slow-breaking fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710431427.0A CN107123580B (en) | 2017-06-09 | 2017-06-09 | Anti-lightning chip type protection element and manufacturing method thereof |
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| CN201710431427.0A CN107123580B (en) | 2017-06-09 | 2017-06-09 | Anti-lightning chip type protection element and manufacturing method thereof |
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| CN107123580B true CN107123580B (en) | 2020-06-05 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004171923A (en) * | 2002-11-20 | 2004-06-17 | Koa Corp | Current fuse and its manufacturing method |
| CN105551905A (en) * | 2016-02-18 | 2016-05-04 | Aem科技(苏州)股份有限公司 | Suspended fuse type surface mounting fuse and preparation method thereof |
| CN106663575A (en) * | 2014-05-16 | 2017-05-10 | 釜屋电机株式会社 | Chip fuse and method for producing same |
| CN207149511U (en) * | 2017-06-09 | 2018-03-27 | 南京萨特科技发展有限公司 | Anti-lightning wafer type protection component |
-
2017
- 2017-06-09 CN CN201710431427.0A patent/CN107123580B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004171923A (en) * | 2002-11-20 | 2004-06-17 | Koa Corp | Current fuse and its manufacturing method |
| CN106663575A (en) * | 2014-05-16 | 2017-05-10 | 釜屋电机株式会社 | Chip fuse and method for producing same |
| CN105551905A (en) * | 2016-02-18 | 2016-05-04 | Aem科技(苏州)股份有限公司 | Suspended fuse type surface mounting fuse and preparation method thereof |
| CN207149511U (en) * | 2017-06-09 | 2018-03-27 | 南京萨特科技发展有限公司 | Anti-lightning wafer type protection component |
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| CN107123580A (en) | 2017-09-01 |
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