CN220085958U

CN220085958U - Fuse connecting mechanism

Info

Publication number: CN220085958U
Application number: CN202321455697.2U
Authority: CN
Inventors: 徐庆伍
Original assignee: Hefei Chengdian Power Equipment Co ltd
Current assignee: Hefei Chengdian Power Equipment Co ltd
Priority date: 2023-06-08
Filing date: 2023-06-08
Publication date: 2023-11-24
Anticipated expiration: 2033-06-08

Abstract

The utility model discloses a fuse connecting mechanism which comprises a PCB, wherein a fuse clamping seat is arranged on the surface of the PCB, a fuse body is arranged on the fuse clamping seat, metal caps are fixed at two ends of the fuse body, the metal caps at two ends of the fuse body are respectively clamped inside two groups of metal contacts on the PCB, the metal contacts are electrically connected with the fuse clamping seat, and the bottoms of right side contact pieces on the metal contacts are connected with a base. This fuse coupling mechanism, the inside of the holding tank that the metal cap at fuse body both ends was offered at metal contact inside respectively the joint, through the elasticity between right side contact, the left side contact, with the inside of metal cap joint at the holding tank, the area of contact between multiplicable metal cap and the metal contact reduces the resistance between metal cap and the metal contact, reduces the temperature of the contact position of fuse during operation, slows down oxidation, ageing of contact position metal, improves its life.

Description

Fuse connecting mechanism

Technical Field

The utility model relates to the field of electrical equipment, in particular to a fuse connecting mechanism.

Background

The fuse is a current protector which melts the melt by heat generated by the fuse after the current exceeds a specified value for a period of time, so that a circuit is disconnected, the fuse protects electronic equipment from being damaged by overcurrent, and serious damage to the electronic equipment caused by internal faults can be avoided.

The tubular fuse is convenient to replace and widely used in electrical equipment, the tubular fuse is generally composed of a glass tube, metal cap electrodes and fuses, the two metal cap electrodes are sleeved at two ends of the glass tube, the fuses are arranged in the glass tube, the two ends of each fuse are welded on central holes of the two metal cap electrodes respectively, and when the tubular fuse is used, the tubular fuse is arranged in a fuse base and connected with a circuit in series.

At present, a connecting structure of a tubular fuse clamps the side surface of a metal cap electrode of the tubular fuse by utilizing a metal contact fixed on a base of the tubular fuse to conduct current, the contact area between the metal contact and the side surface of the metal cap electrode is small, and the oxidation and aging of metals at the contact position are accelerated according to the physical principle that the resistance is inversely proportional to the cross section of the same material and the resistance is large when the metal contact is used for conducting the electrical current.

Disclosure of Invention

The present utility model is directed to a fuse connecting mechanism, which solves the above-mentioned drawbacks of the prior art.

In order to achieve the above-mentioned purpose, provide a fuse coupling mechanism, including the PCB board, PCB board surface mounting fuse cassette, and install the fuse body on the fuse cassette, the metal cap is all fixed at the both ends of fuse body simultaneously, the metal cap at fuse body both ends is inside two sets of metal contacts of joint on the PCB board respectively, and metal contact and fuse cassette electric connection, right side contact bottom on the metal contact links to each other with the base, and left side contact bottom links to each other with the base, and the fixed setting of base bottom and locating piece simultaneously, and the constant head tank is seted up on the surface of fuse cassette, and fixes through two sets of screws between fuse cassette and the PCB board.

Preferably, the metal contact comprises a right side contact piece, a left side contact piece and a base, and a containing groove is formed between the right side contact piece and the left side contact piece.

Preferably, the size of holding tank and metal cap looks adaptation, and metal cap joint is in the inside of holding tank, and metal cap and holding tank inner wall contact simultaneously.

Preferably, the top of the right side contact piece and the top of the left side contact piece are respectively fixedly provided with a first poking piece and a second poking piece, and the right side contact piece and the left side contact piece are of symmetrical structures relative to the metal cap.

Preferably, the inner wall of the first plectrum is provided with an inner groove, the outer wall of the first plectrum is provided with an outer groove, and meanwhile, the first plectrum and the second plectrum are arranged in an inverted splayed shape.

Preferably, the positioning block is matched with the positioning groove in size, the positioning block is inserted into the positioning groove, two groups of screw holes are formed in the bottom of the positioning block, and the positioning block is fixed in the positioning groove through two groups of screws.

Compared with the prior art, the utility model has the beneficial effects that: the metal caps at two ends of the fuse body are respectively clamped in the accommodating grooves formed in the metal contacts, the metal caps are clamped in the accommodating grooves through the elasticity between the right side contact piece and the left side contact piece, the contact area between the metal caps and the metal contacts can be increased, the resistance between the metal caps and the metal contacts is reduced, the temperature of contact parts of the fuse during operation is reduced, oxidation and aging of metals at the contact parts are slowed down, and the service life of the fuse is prolonged.

Drawings

FIG. 1 is a schematic elevational view of the structure of the present utility model;

FIG. 2 is a schematic view of section A-A of FIG. 1, which is a structural diagram of the present utility model;

FIG. 3 is a schematic view of the outward expansion of the right and left side contact of the present utility model;

fig. 4 is a schematic three-dimensional view of a structural metal contact according to the present utility model.

Reference numerals in the drawings: 1. a PCB board; 2. a fuse body; 21. a metal cap; 3. a fuse holder; 4. a metal contact; 40. a first plectrum; 41. an inner groove; 42. an outer groove; 43. a right side contact; 44. a receiving groove; 45. a base; 46. a left side contact; 47. a second pulling piece; 48. a positioning block; 49. and a positioning groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the utility model provides a fuse connection mechanism, which comprises a PCB board 1, a fuse holder 3 is mounted on the surface of the PCB board 1, a fuse body 2 is mounted on the fuse holder 3, and metal caps 21 are fixed at both ends of the fuse body 2, and is characterized in that: the metal caps 21 at two ends of the fuse body 2 are respectively clamped inside two groups of metal contacts 4 on the PCB 1, the metal contacts 4 are electrically connected with the fuse clamping seat 3, the bottoms of right side contact pieces 43 on the metal contacts 4 are connected with the base 45, the bottoms of left side contact pieces 46 are connected with the base 45, meanwhile, the bottoms of the base 45 are fixedly arranged with the positioning blocks 48, positioning grooves 49 are formed in the surface of the fuse clamping seat 3, and the fuse clamping seat 3 is fixed with the PCB 1 through two groups of screws.

Working principle: when the handheld fuse body 2 is used, the metal caps 21 at two ends of the fuse body 2 are respectively clamped in the accommodating grooves 44 formed in the metal contacts 4, the metal caps 21 are clamped in the accommodating grooves 44 through the elasticity between the right side contact piece 43 and the left side contact piece 46, the contact area between the metal caps 21 and the metal contacts 4 can be increased, the resistance between the metal caps 21 and the metal contacts 4 is reduced, the temperature of contact parts of the fuse during operation is reduced, oxidation and aging of metals at the contact parts are slowed down, and the service life of the fuse is prolonged.

As a preferred embodiment, the metal contact 4 includes a right side contact 43, a left side contact 46 and a base 45, and a receiving groove 44 is formed between the right side contact 43 and the left side contact 46.

As shown in fig. 1-3: the metal contact 4 comprises a right side contact piece 43, a left side contact piece 46 and a base 45, and the right side contact piece 43, the left side contact piece 46 and the base 45 are respectively wrapped on the outer side of the metal cap 21, so that the contact area between the metal cap 21 and the metal contact 4 can be increased.

As a preferred embodiment, the size of the accommodating groove 44 is matched with that of the metal cap 21, and the metal cap 21 is clamped inside the accommodating groove 44, and meanwhile, the metal cap 21 is contacted with the inner wall of the accommodating groove 44.

As shown in fig. 1-3: the metal cap 21 is contacted with the inner wall of the accommodating groove 44, so that the contact area between the metal cap 21 and the metal contact 4 is increased;

according to the physical principle that the resistance is inversely proportional to the cross section of the material for the same material with the same resistivity, the resistance generated by the metal cap 21 and the metal contact 4 during conduction can be reduced, and the temperature of the contact part can be reduced.

As a preferred embodiment, the top parts of the right side contact piece 43 and the left side contact piece 46 are respectively and fixedly provided with the first poking piece 40 and the second poking piece 47, and the right side contact piece 43 and the left side contact piece 46 are symmetrical structures relative to the metal cap 21.

As shown in fig. 2-3: when the fuse body 2 is disassembled, the first pulling piece 40 and the second pulling piece 47 are respectively held by two fingers, so that the volume of the accommodating groove 44 is increased, and the metal cap 21 is conveniently disassembled from the inside of the accommodating groove 44.

As a preferred embodiment, the inner wall of the first plectrum 40 is provided with an inner groove 41, the outer wall of the first plectrum 40 is provided with an outer groove 42, and the first plectrum 40 and the second plectrum 47 are arranged in an inverted splayed shape.

The first poking piece 40 and the second poking piece 47 are arranged in an inverted splayed mode, the inner walls of the first poking piece 40 and the second poking piece 47 are provided with the inner groove 41, the metal cap 21 is arranged in the inner groove 41 and is pressed downwards, the metal cap 21 overcomes the elasticity between the right side contact piece 43 and the left side contact piece 46, is clamped in the accommodating groove 44, and is clamped in the outer side of the metal cap 21 under the reset rebound operation of the right side contact piece 43 and the left side contact piece 46, so that the metal cap 21 is fixed.

As a preferred embodiment, the positioning block 48 is matched with the positioning groove 49 in size, the positioning block 48 is inserted into the positioning groove 49, two sets of screw holes are formed in the bottom of the positioning block 48, and the positioning block 48 is fixed in the positioning groove 49 through two sets of screws.

The metal contact 4 is made of copper metal material, and has good conductivity and ductility.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fuse coupling mechanism, includes PCB board (1), PCB board (1) surface mounting fuse cassette (3), and installs fuse body (2) on fuse cassette (3), all fixes metal cap (21), its characterized in that at the same time at the both ends of fuse body (2): the metal caps (21) at two ends of the fuse body (2) are respectively clamped inside two groups of metal contacts (4) on the PCB (1), the metal contacts (4) are electrically connected with the fuse clamping seat (3), the bottoms of the right side contact pieces (43) on the metal contacts (4) are connected with the base (45), the bottoms of the left side contact pieces (46) are connected with the base (45), meanwhile, the bottoms of the base (45) are fixedly arranged with the positioning blocks (48), positioning grooves (49) are formed in the surface of the fuse clamping seat (3), and the fuse clamping seat (3) is fixed with the PCB (1) through two groups of screws.

2. A fuse connection mechanism in accordance with claim 1, wherein: the metal contact (4) comprises a right side contact piece (43), a left side contact piece (46) and a base (45), and a containing groove (44) is formed between the right side contact piece (43) and the left side contact piece (46).

3. A fuse connection mechanism in accordance with claim 2, wherein: the size of holding groove (44) and metal cap (21) looks adaptation, and metal cap (21) joint is in the inside of holding groove (44), and metal cap (21) and holding groove (44) inner wall contact simultaneously.

4. A fuse connection mechanism in accordance with claim 1, wherein: the tops of the right side contact piece (43) and the left side contact piece (46) are respectively fixedly provided with a first poking piece (40) and a second poking piece (47), and the right side contact piece (43) and the left side contact piece (46) are of symmetrical structures relative to the metal cap (21).

5. A fuse attachment mechanism in accordance with claim 4 wherein: an inner groove (41) is formed in the inner wall of the first poking piece (40), an outer groove (42) is formed in the outer wall of the first poking piece (40), and meanwhile the first poking piece (40) and the second poking piece (47) are arranged in an inverted splayed mode.

6. A fuse connection mechanism in accordance with claim 1, wherein: the positioning block (48) is matched with the positioning groove (49) in size, the positioning block (48) is inserted into the positioning groove (49), two groups of screw holes are formed in the bottom of the positioning block (48), and the positioning block (48) is fixed in the positioning groove (49) through two groups of screws.