A fuse core structure with low loop resistance and high reliability

Abstract

The present invention provides a fuse core structure with low loop resistance and high reliability, including a fuse core. Both ends of the positioning plate of the fuse core are respectively connected with current-carrying components through boss structures. The tail end of the upper current-carrying component is connected to the upper end of the fuse core, and the front end extends into a connection component arranged on the upper side of the fuse core and is continuously electrically connected to the connection component. The tail end of the lower current-carrying component is connected to the lower end of the fuse core, and after the front end is bent, it is movably and electrically connected to a moving contact component arranged at one side position of the fuse core. The present invention adopts an integrated design of the metal cap of the fuse core and the conductive circuit. The metal cap of the fuse core is directly connected to the wire and the contact, reducing the loop resistance during conduction, improving the assembly convenience of the fuse core at the same time, and saving the time spent on assembly. The metal caps at both ends of the fuse core and the positioning parts adopt a limit boss design, which is sleeved on the fuse tube and is mutually buckled and limited through the boss structure, ensuring the firmness and reliability of the fixation of the two, and having good development prospects.

Description

Technical Field

[0001] The present invention relates to the field of low-voltage electrical appliances, and specifically to a fuse core structure. Background Art

[0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their application scope. A low-voltage circuit breaker, also known as an automatic switch and commonly referred to as an "air switch", is also a low-voltage circuit breaker. It is an electrical appliance that has the function of a manual switch and can automatically perform undervoltage, overvoltage, overload, and short-circuit protection. It can be used to distribute electric energy, start asynchronous motors infrequently, and protect power supply lines and motors, etc. When they encounter serious overload, short-circuit, undervoltage and other faults, it can automatically cut off the circuit. Its function is equivalent to the combination of a fuse switch and an over- and under-heat relay, etc. Moreover, generally no components need to be changed after breaking the fault current, and it has been widely used.

[0003] In the existing fuse, both ends of the fuse tube are wrapped by metal caps and installed in the conductive circuit, which easily leads to excessive heat generation in the conductive circuit, affects the components in the conductive circuit, reduces the service life of the components in the conductive circuit, and there is a risk of unqualified assembly and fixation methods for the metal caps and the fuse tube. Summary of the Invention

[0004] The purpose of the present invention is to provide a fuse core structure in which the metal cap and the fuse tube are stably matched and the heat generation of the conductive circuit is low after installation.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A fuse core structure with low loop resistance and high reliability, including a fuse core. Both ends of the fuse core are respectively connected with current-carrying parts through boss structures. The tail end of the upper current-carrying part is connected to the upper end of the fuse core, and the front end extends into the connection component arranged on the upper side of the fuse core and is continuously electrically connected to the connection component. The tail end of the lower current-carrying part is connected to the lower end of the fuse core, and the front end is bent and is movably and electrically connected to the moving contact component arranged on one side of the fuse core.

[0007] As a further scheme of the present invention: The fuse core includes a positioning plate and a fuse tube. The fuse tube is in a long strip shape, and the positioning plate is a rectangular panel, which is bent and wrapped outside the side surface of the fuse tube and connected end to end.

[0008] As a further scheme of the present invention: Limiting card slots and positioning plate limiting bosses are respectively arranged at the joints of the positioning plates. The limiting card slots are concave structures, and the positioning plate limiting bosses correspond to the shapes of the limiting card slots. The head and tail ends of the positioning plates are snap-limited and connected through the limiting card slots and the positioning plate limiting boss structures.

[0009] As a further scheme of the present invention: Limiting card slots are arranged at the positions of the four side surfaces of the positioning plate close to the upper and lower end surfaces of the fuse tube.

[0010] As a further solution of the present invention: The current-carrying member includes a wiring board and a static contact. The wiring board is connected to the connection component, and the static contact is movably connected to the moving contact component. The bottom surfaces of the wiring board and the static contact are rectangular panels. One side of the rectangle extends out a long strip structure to be connected to the connection component and the moving contact component, and the other three sides are provided with protruding rectangular structures. The outer ends of the rectangular structures are connected with current-carrying member limiting bosses in a boss shape.

[0011] As a further solution of the present invention: The current-carrying member wraps the end position of the fuse tube through the bent protruding rectangular structure and the long strip structure, and realizes the stable connection between the current-carrying member and the fuse core through the snap limit of the current-carrying member limiting boss and the limit card slot of the positioning plate.

[0012] Beneficial effects

[0013] 1. The present invention adopts an integrated design of the metal cap of the fuse core and the conductive circuit, which is directly connected to the wire and the contact, reduces the loop resistance of the conduction, and improves the assembly convenience of the fuse core at the same time.

[0014] 2. The present invention adopts a limiting boss design for the metal cap and the positioning member, and sleighs it on the fuse tube, ensuring the firmness and reliability of the fixation of the two. Description of the drawings

[0015] Figure 1 It is a schematic diagram of the fuse core installation of the first embodiment of the present invention.

[0016] Figure 2 It is a schematic diagram of the fuse core structure of the first embodiment of the present invention.

[0017] Figure 3 It is a schematic diagram of the wiring board structure of the first embodiment of the present invention.

[0018] Figure 4 It is a schematic diagram of the static contact structure of the first embodiment of the present invention.

[0019] Figure 5 It is an unfolded view of the fuse core structure of the first embodiment of the present invention.

[0020] Figure 6 It is a schematic diagram of the fuse core installation of the second embodiment of the present invention.

[0021] Figure 7 It is a schematic diagram of the fuse core structure of the second embodiment of the present invention.

[0022] Figure 1-7 Among them: 1 - fuse core, 101 - positioning plate, 102 - fuse tube, 103 - limit card slot, 104 - positioning plate limiting boss, 2 - current-carrying member, 201 - wiring board, 202 - static contact, 203 - current-carrying member limiting boss, 3 - connection component, 4 - moving contact component. Detailed implementation manners

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Unless otherwise defined, the technical terms or scientific terms used in this disclosure shall have the ordinary meanings understood by those of ordinary skill in the art to which this disclosure pertains. The words such as "including" or "comprising" used in this disclosure mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. The words such as "connected" or "coupled" are not limited to physical or mechanical connections, and may also include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0025] Embodiment 1

[0026] Please refer to Figure 1-5 , in the embodiments of the present invention, a fuse core structure with low loop resistance and high reliability includes a fuse core 1, a positioning plate 101, a fuse tube 102, a limit card slot 103, a positioning plate limit boss 104, a current-carrying member 2, a wiring board 201, a static contact 202, a current-carrying member limit boss 203, a connection assembly 3, and a moving contact assembly fuse core 4. Both ends of the fuse core 1 are respectively connected to the current-carrying member 2 through a boss structure. The tail end of the upper current-carrying member 2 is connected to the upper end of the fuse core 1, and the front end extends into the connection assembly 3 arranged on the upper side of the fuse core 1 and is continuously electrically connected to the connection assembly 3. The tail end of the lower current-carrying member 2 is connected to the lower end of the fuse core 1, and the front end is bent and is movably and electrically connected to the moving contact assembly 4 arranged on one side of the fuse core 1.

[0027] Among them: The fuse core 1 includes a positioning plate 101 and a fuse tube 102. The fuse tube 102 is in a long strip shape, and the positioning plate 101 is a rectangular panel, which is bent and wrapped around the outer side of the side surface of the fuse tube 102 and is connected end to end.

[0028] Among them: The joints of the positioning plate 101 are respectively provided with a limit card slot 103 and a positioning plate limit boss 104. The limit card slot 103 is a concave structure, and the positioning plate limit boss 104 corresponds to the shape of the limit card slot 103. The two ends of the positioning plate 101 are snap-limitedly connected through the limit card slot 103 and the positioning plate limit boss 104 structures.

[0029] Wherein: Limited position clamping grooves 103 are arranged at positions on four side surfaces of the positioning plate 101 close to upper and lower end faces of the fuse tube 102.

[0030] Wherein: The current-carrying part 2 includes a wiring board 201 and a static contact 202. The wiring board 201 is connected to the connection assembly 3, and the static contact 202 is movably connected to the moving contact assembly 4. Bottom surfaces of the wiring board 201 and the static contact 202 are rectangular panels. A long strip structure extends from one side of the rectangle and is connected to the connection assembly 3 and the moving contact assembly 4. Rectangular structures protruding are arranged on the other three sides, and carrier part limited position bosses 203 in the shape of a boss are connected to outer ends of the rectangular structures.

[0031] Wherein: The current-carrying part 2 wraps the end positions of the fuse tube 102 through the bent protruding rectangular structures and the long strip structure, and realizes stable connection between the current-carrying part 2 and the fuse core 1 through snap limit of the carrier part limited position boss 203 and the limited position clamping groove 103 of the positioning plate 101.

[0032] When using the present invention, the front end of the wiring board 201 in the current-carrying part 2 is connected to the connection assembly 3 in the fuse. The fuse core 1 is fixed by snap of a corresponding installation groove in the fuse housing. After the fuse is installed and started, the moving contact assembly 4 rotates driven by the fuse switch assembly and fits with the static contact 202 to realize connection of the conductive circuit. Through the integrated design of the metal cap of the fuse core 1 and the conductive loop, it is directly connected to the wire and the contact, reducing the loop resistance of the conduction, improving the assembly convenience of the fuse core 1 at the same time. The structural connection between the fuse core and the current-carrying part increases the firmness and reliability of the fixation between the fuse core 1 and the current-carrying part 2.

[0033] Embodiment 2

[0034] Please refer to Figure 1-7 , in the embodiment of the present invention, a fuse core structure with low loop resistance and high reliability includes a fuse core 1, a positioning plate 101, a fuse tube 102, a limited position clamping groove 103, a positioning plate limited position boss 104, a current-carrying part 2, a wiring board 201, a static contact 202, a carrier part limited position boss 203, a connection assembly 3, and a moving contact assembly fuse core 4. Both ends of the fuse core 1 are respectively connected with a current-carrying part 2 through a boss structure. The tail end of the upper current-carrying part 2 is connected to the upper end of the fuse core 1, and the front end extends into the connection assembly 3 arranged on the upper side of the fuse core 1 and is continuously electrically connected to the connection assembly 3. The tail end of the lower current-carrying part 2 is connected to the lower end of the fuse core 1, and the front end is bent and is movably and electrically connected to the moving contact assembly 4 arranged at a position on one side of the fuse core 1.

[0035] Wherein: The fuse core 1 includes a positioning plate 101 and a limited position clamping groove 103. The fuse tube 102 is in a long strip shape, and strip-shaped limited position clamping grooves are arranged at both ends of four side surfaces of the fuse tube. The head end of the limited position clamping groove is in a concave platform shape.

[0036] Among them: The current-carrying member 2 includes a wiring board 201 and a static contact 202. The wiring board 201 is connected to the connection assembly 3, and the static contact 202 is movably connected to the moving contact assembly 4. The bottom surfaces of the wiring board 201 and the static contact 202 are rectangular panels. A long strip structure extends from one side of the rectangle to be connected to the connection assembly 3 and the moving contact assembly 4, and protruding rectangular structures are provided on the other three sides. The outer ends of the rectangular structures are connected with current-carrying member limiting bosses 203 in a boss shape.

[0037] Among them: The current-carrying member 2 wraps the end position of the fuse tube 102 through the bent protruding rectangular structure and the long strip structure, and realizes the stable connection between the current-carrying member 2 and the fuse core 1 through the snap limit of the current-carrying member limiting boss 203 and the limit card slot 103.

[0038] When using the present invention, the front end of the wiring board 201 in the current-carrying member 2 is connected to the connection assembly 3 in the fuse. The fuse core 1 is fixed by snap in the corresponding installation groove in the fuse housing. After the fuse is installed and started, the moving contact assembly 4 rotates driven by the fuse switch assembly and fits with the static contact 202 to realize the connection of the conductive circuit. Through the integrated design of the metal cap of the fuse core 1 and the conductive circuit, it is directly connected to the wire and the contact, reducing the loop resistance of the conduction, and at the same time improving the assembly convenience of the fuse core 1. The limit card slot 103 is directly arranged on the surface of the fuse tube 102, reducing the cost of the positioning plate 101 and the connection fluctuation brought by the positioning plate 101, and further improving the firmness and reliability of the fixation of the two.

[0039] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. A fuse core structure with low loop resistance and high reliability, characterized in that, It includes a fuse core (1). The two ends of the fuse core (1) are respectively connected with current-carrying components (2) through boss structures. The tail end of the upper current-carrying component (2) is connected to the upper end of the fuse core (1), and the front end extends into a connection component (3) arranged on the upper side of the fuse core (1) and is continuously electrically connected to the connection component (3). The tail end of the lower current-carrying component (2) is connected to the lower end of the fuse core (1), and after the front end is bent, it is movably and electrically connected to a moving contact component (4) arranged on one side of the fuse core (1). The fuse core (1) includes a positioning plate (101) and a fuse tube (102). The fuse tube (102) is in a long strip shape, and the positioning plate (101) is a rectangular panel, which is bent and wrapped around the outer side of the side surface of the fuse tube (102) and is connected end to end. Limiting card slots (103) and positioning plate limiting bosses (104) are respectively arranged at the joints of the positioning plate (101). The limiting card slot (103) is a concave structure, and the positioning plate limiting boss (104) corresponds to the shape of the limiting card slot (103). The two ends of the positioning plate (101) are connected by a snap limit connection through the limiting card slot (103) and the positioning plate limiting boss (104) structures. Limiting card slots (103) are arranged at positions on the four side surfaces of the positioning plate (101) close to the upper and lower end surfaces of the fuse tube (102). The current-carrying component (2) includes a wiring board (201) and a static contact (202). The wiring board (201) is connected to the connection component (3), and the static contact (202) is movably connected to the moving contact component (4). The bottom surfaces of the wiring board (201) and the static contact (202) are rectangular panels. A long strip structure extends from one side of the rectangle and is connected to the connection component (3) and the moving contact component (4). Rectangular structures protrude on the other three sides, and the outer ends of the rectangular structures are connected with boss-shaped current-carrying component limiting bosses (203).

2. The fuse core structure with low loop resistance and high reliability according to claim 1, characterized in that: The current-carrying component (2) wraps the end position of the fuse tube (102) through the bent protruding rectangular structure and the long strip structure, and realizes the stable connection between the current-carrying component (2) and the fuse core (1) through the snap limit of the current-carrying component limiting boss (203) and the limiting card slot (103) of the positioning plate (101).

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