CN114976715A

CN114976715A - Low-cost large-current flat terminal structure

Info

Publication number: CN114976715A
Application number: CN202210610518.1A
Authority: CN
Inventors: 许公杰; 倪泉
Original assignee: Huizhou Nisoco Connection Technology Co ltd
Current assignee: Huizhou Nisoco Connection Technology Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-08-30

Abstract

The invention discloses a low-cost large-current flat terminal structure, which comprises a contact element and a reinforcing sleeve, wherein the contact element comprises a clamping part and a connecting part, the clamping part is formed by bending, the clamping part is of a flat up-down symmetrical structure, the tail end of the clamping part is provided with a plurality of elastic sheets, and one side of the clamping part, which is close to the connecting part, is provided with a clamping part; the material intensity of reinforcement cover is greater than the material intensity of contact, the reinforcement cover is the integrated into one piece structure, the reinforcement cover includes parcel portion, multi-disc profile modeling reinforcement piece and a plurality of lock piece, the clamping part end is located to the parcel portion cover, the multi-disc profile modeling reinforcement piece lid is located on many bullet pieces, and is a plurality of lock piece cooperation stop portion is fixed. The invention provides a low-cost large-current flat terminal structure, which is relatively simple in structure and assembly process, greatly reduces the material and assembly cost, and improves the product quality; while also providing a more stable contact retention.

Description

Low-cost large-current flat terminal structure

Technical Field

The invention relates to the technical field of connectors, in particular to a low-cost large-current flat terminal structure.

Background

At present, the common large-current flat contact element on the market generally adopts a single-layer structure made of a single material, namely, the elastic contact piece is formed by a single part.

Because the contact pin that electric automobile used need possess heavy current load and the performance of high plug life-span, and does not have which kind of material to be satisfied with in the requirement of electric conductivity, yield strength, hardness simultaneously, and because need leave certain punching press clearance (considering the problem of punching press work piece self intensity) in the stamping process, so the contact point of current transmission also can reduce by a wide margin to make the big high temperature of contact resistance. And chinese patent CN202010430672.1 discloses a two reed formula jack structure has solved above-mentioned problem, and concrete adoption ladle copper two reed formula structure has good elasticity and electric conductivity, compares in single reed formula jack structure, and when two reed formula jack structure and piece formula contact pin joined in marriage and insert, contact quantity is many, promotes the stability of contact holding power.

Although the scheme meets the requirements of high current carrying and high contact holding force, the multilayer stacking structure is complex, and a plurality of required parts are needed, so that the part cost is increased sharply; meanwhile, the assembling process is relatively complex, and the assembling cost is greatly improved. Therefore, the overall cost is high, and the market competitiveness is greatly reduced. Meanwhile, the complicated processes can cause uneven quality of the assembled product, and the contact piece can be rapidly heated in serious cases, so that the charging stability is influenced, and potential safety hazards are buried.

Disclosure of Invention

The invention aims to provide a low-cost large-current flat terminal structure, which is relatively simple in structure and assembly process, greatly reduces the material and assembly cost, and improves the product quality; while also providing a more stable contact retention.

The invention discloses a low-cost large-current flat terminal structure, which adopts the technical scheme that:

a low-cost large-current flat terminal structure comprises a contact element and a reinforcing sleeve, wherein the contact element comprises a clamping part and a connecting part which are formed by bending, the clamping part is of a flat up-and-down symmetrical structure, the tail end of the clamping part is provided with a plurality of elastic sheets, and one side of the clamping part, which is close to the connecting part, is provided with a clamping part; the material intensity of reinforcement cover is greater than the material intensity of contact, the reinforcement cover is the integrated into one piece structure, the reinforcement cover includes parcel portion, multi-disc profile modeling reinforcement piece and a plurality of locking parts, the clamping part end is located to parcel portion cover, the multi-disc profile modeling reinforcement piece lid is located on many bullet pieces, and is a plurality of locking part cooperation clamping part is fixed.

Preferably, the middle part of the elastic sheet is provided with an inwards concave contact part.

Preferably, one piece of the profiling reinforcing sheet is covered on one or more elastic sheets.

Preferably, the tail end of the elastic sheet is provided with a plurality of sub elastic sheets.

Preferably, the tail end of the bullet sheet is provided with a raised part.

Preferably, a bent portion is provided between the clamping portion and the connecting portion, and the bent connecting portion is formed in an overlapping shape.

Preferably, the clamping portion, the bending portion and the connecting portion are integrally formed.

As preferred scheme, clamping part and contact are 90 °, the clamping part is the U-shaped clamp, parcel portion is the U-shaped board, parcel portion parcel clamping part is terminal, stop portion is a pair of first card and stop the groove, the locking piece includes a pair of first locking piece and second locking piece, parcel portion both sides are arranged respectively in to first locking piece and second locking piece, and is a pair of first card is gone into and is stopped inslot and fix in a pair of first card, the second locking piece top is touched the clamping part and is kept away from connecting portion one side and fix.

Preferably, a reinforcing area is arranged between the clamping part and the connecting part.

As preferred scheme, the clamping part is 180 with the contact, the clamping part is the lamination clamp, parcel portion is the annular cover, parcel portion cover is located around the clamping part, stop the portion and stop the groove for the second, the locking piece includes third locking piece and multi-disc fourth locking piece, parcel portion homonymy is arranged in to third locking piece and fourth locking piece, third locking piece card is gone into the second and is stopped the inslot and fix, the multi-disc fourth locking piece top is touched the portion of bending and is fixed.

The invention discloses a low-cost large-current flat terminal structure, which has the beneficial effects that: the contact piece comprises a clamping part and a connecting part, wherein the clamping part is formed by bending and is of a flat up-down symmetrical structure, a plurality of elastic pieces are arranged at the tail end of the clamping part, and a clamping part is arranged on one side, close to the connecting part, of the clamping part. The material intensity of reinforcement cover is greater than the material intensity of contact, and the reinforcement cover is the integrated into one piece structure, and the reinforcement cover includes parcel portion, multi-disc profile modeling reinforcement piece and a plurality of lock piece, and the clamping part is terminal to parcel portion cover, and multi-disc profile modeling reinforcement piece lid is located on many plays the piece, and a plurality of lock piece cooperation stop portion are fixed. Compared with the prior art, the technical scheme only needs two parts and structures, and the corresponding assembly process is simpler and more convenient, so that the material and assembly cost is greatly reduced; the simple assembly process greatly reduces the assembly error, further improves the product quality, reduces the probability of heating of the contact element due to the assembly error, and simultaneously the contact element is integrally bent, the integral conduction resistance value is the inner part of the contact element, other extra values do not need to be considered, so the heating probability of the contact element is greatly reduced after synthesis, and the probability of potential safety hazards is also reduced; because the material intensity of reinforcement cover is greater than the material intensity of contact, the reinforcement cover can provide comparatively permanent normal force for the contact, and then can provide comparatively stable contact holding power, makes the life of product more permanent, promotes market competition.

Drawings

Fig. 1 is a schematic structural diagram of a low-cost large-current flat terminal structure according to an embodiment of the present invention.

Fig. 2 is an assembly diagram of a low-cost large-current flat terminal structure according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a low-cost large-current flat terminal structure contact according to an embodiment of the present invention.

Fig. 4 is a schematic view of a first viewing angle structure of a reinforcing sleeve of a low-cost large-current flat terminal structure according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of a second view structure of a reinforcing sleeve of a low-cost large-current flat terminal structure according to an embodiment of the present invention.

Fig. 6 is a side view of a low cost high current flat terminal structure according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a low-cost large-current flat terminal structure according to another embodiment of the present invention.

Fig. 8 is an assembly diagram of a low-cost large-current flat terminal structure according to another embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a low-cost large-current flat terminal structure contact according to another embodiment of the present invention.

Fig. 10 is a schematic structural diagram of a reinforcing sleeve of a low-cost large-current flat terminal structure according to another embodiment of the present invention.

Fig. 11 is a side view of a low-cost high-current flat terminal structure according to another embodiment of the present invention.

Detailed Description

The invention will be further elucidated and described with reference to the embodiments and drawings of the specification:

the first embodiment is as follows:

referring to fig. 1-6, a low-cost high-current flat terminal structure includes a contact 10 and a reinforcing sleeve 20.

Referring to fig. 1-3, the contact 10 includes a clamping portion 11 and a connecting portion 12 formed by bending, and a bending portion 13 is disposed between the clamping portion 11 and the connecting portion 12, so that the bent connecting portion 12 is overlapped to facilitate connection with the outside. And the clamping portion 11, the bent portion 13 and the connecting portion 12 are integrally formed. The clamping part 11 is a flat vertically symmetrical structure, the end of the clamping part 11 is provided with a plurality of elastic sheets 111, and one side of the clamping part 11 close to the connecting part 12 is provided with a clamping part 112.

Referring to fig. 1, 2, 4 and 5, the strength of the material of the reinforcement sleeve 20 is greater than that of the contact member 10, the contact member 10 is preferably made of high-conductivity copper, and the reinforcement sleeve 20 is preferably made of high-strength steel. The reinforcing sleeve 20 is an integrally formed structure, the reinforcing sleeve 20 comprises a wrapping portion 21, a plurality of copying reinforcing sheets 22 and a plurality of locking pieces 23, the wrapping portion 21 is sleeved at the tail end of the clamping portion 11, the plurality of copying reinforcing sheets 22 are covered on the plurality of elastic sheets 111, and the plurality of locking pieces 23 are matched with the clamping stop portion 112 to be fixed.

Compared with the prior art, the technical scheme only needs two parts, has a structure, and is simpler and more convenient in corresponding assembly process, so that the material and assembly cost is greatly reduced.

The simple and convenient equipment process reduces the equipment error in very big degree, and then can promote the quality of product, makes contact 10 reduce because the equipment error probability that generates heat, and contact 10 is integrative to be buckled simultaneously and forms, and whole on-resistance is inside its self promptly, need not to consider other extra values, so synthesize contact 10 probability that generates heat and with greatly reduced, the probability that the potential safety hazard takes place also reduces thereupon.

Because the material intensity of reinforcement cover 20 is greater than the material intensity of contact 10, reinforcement cover 20 can provide comparatively permanent normal force for contact 10, and then can provide comparatively stable contact holding power, makes the life of product more permanent, promotes market competition.

The profiling reinforcing sheet 22 can be more attached to the elastic sheet 111.

In this embodiment, one copy reinforcement 22 is covered on one or more elastic sheets 111. When the plurality of elastic pieces 111 are simultaneously placed below the profiling reinforcing piece 22, the reverse force of the plurality of elastic pieces 111 more uniformly acts on the profiling reinforcing piece 22.

Meanwhile, the tail end of the elastic sheet 111 is provided with a plurality of bullet sheets 1111, so that the elasticity of the elastic sheet can be improved. The tail end of the bullet piece 1111 is provided with a raised part 1112 which plays a role in guiding and is convenient for the insertion of an external insertion piece.

Preferably, referring to fig. 6 and 11, the middle portion of the elastic sheet 111 is provided with a concave contact portion 113. When the external inserting sheet is inserted, the bullet sheet 1111 at the tail end of the elastic sheet 111 clamps and is connected with the external inserting sheet; at this time, the concave contact portion 113 also contacts the insert sheet. The bullet piece 1111 and the concave contact part 113 are superposed on the insertion piece, and the effective conductive sectional area is increased.

Combined with contact resistance R (Ω) analysis. The main factors influencing the contact resistance R are: a. effective conductive distance L (m) of the conductor, resistivity ρ (Ω. mm2/m) of the conductor, and effective conductive cross-sectional area A (mm2) of the conductor.

The corresponding principle expression is as follows:

it is assumed that the same material is used as the contact 10 material and that the conductive distances are the same (i.e., the resistivity ρ and the effective conductive distance L are unchanged). The increase of the effective conductive sectional area A can greatly reduce the contact resistance R, thereby realizing the effects of high current carrying and low loss.

Specifically, the method comprises the following steps:

the clamping portion 11 is at 90 ° to the contact 10 in this embodiment. The clamping part 11 is a U-shaped clamp, the wrapping part 21 is a U-shaped plate, and the wrapping part 21 wraps the tail end of the clamping part 11. The locking portion 112 is a pair of first locking grooves 1121, the locking member 23 includes a pair of first locking pieces 231 and a second locking piece 232, the first locking pieces 231 and the second locking pieces 232 are respectively disposed on two sides of the wrapping portion 21, the pair of first locking pieces 231 are clamped into the pair of first locking grooves 1121 for fixation, and the second locking piece 232 is abutted against the clamping portion 11 for fixation on the side away from the connecting portion 12.

Preferably, a reinforcing region 114 is disposed between the clamping portion 11 and the connecting portion 12 to enhance the strength of the overall structure and prevent the contact 10 from twisting relative to the connecting portion 12, which would affect the conductive efficiency.

Example two:

referring to figures 7-11 of the drawings,

in this embodiment, the holding portion 11 and the contact member 10 form an angle of 180 °, the holding portion 11 is a lamination clip, the wrapping portion 21 is an annular sleeve, and the wrapping portion 21 is sleeved around the holding portion 11. The clamping part 112 is a second clamping groove 1122, the locking piece 23 comprises a third locking piece 233 and a plurality of fourth locking pieces 234, the third locking piece 233 and the fourth locking pieces 234 are arranged on the same side of the wrapping part 21, the third locking piece 233 is clamped into the second clamping groove 1122 to be fixed, and the plurality of fourth locking pieces 234 are pressed against the bent part 13 to be fixed.

The wrapping portion 21 is further provided with a raising spring piece 211 outside for matching with an external structure for connection.

The invention provides a low-cost large-current flat terminal structure, wherein a contact piece comprises a clamping part and a connecting part which are formed by bending, the clamping part is of a flat up-and-down symmetrical structure, a plurality of elastic sheets are arranged at the tail end of the clamping part, and a clamping part is arranged on one side of the clamping part, which is close to the connecting part. The material intensity of reinforcement cover is greater than the material intensity of contact, and the reinforcement cover is the integrated into one piece structure, and the reinforcement cover includes parcel portion, multi-disc profile modeling reinforcement piece and a plurality of lock piece, and the clamping part is terminal to parcel portion cover, and multi-disc profile modeling reinforcement piece lid is located on many plays the piece, and a plurality of lock piece cooperation stop portion are fixed. Compared with the prior art, the technical scheme only needs two parts and structures, and the corresponding assembly process is simpler and more convenient, so that the material and assembly cost is greatly reduced; the simple assembly process greatly reduces the assembly error, further improves the product quality, reduces the probability of heating of the contact element due to the assembly error, and simultaneously the contact element is integrally bent, the integral conduction resistance value is the inner part of the contact element, other extra values do not need to be considered, so the heating probability of the contact element is greatly reduced after synthesis, and the probability of potential safety hazards is also reduced; because the material intensity of reinforcement cover is greater than the material intensity of contact, the reinforcement cover can provide comparatively permanent normal force for the contact, and then can provide comparatively stable contact holding power, makes the life of product more permanent, promotes market competition.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A low-cost large-current flat terminal structure is characterized by comprising a contact element, wherein the contact element comprises a clamping part and a connecting part which are formed by bending, the clamping part is of a flat up-and-down symmetrical structure, the tail end of the clamping part is provided with a plurality of elastic sheets, and one side of the clamping part, which is close to the connecting part, is provided with a clamping part;

the reinforcing sleeve is of an integrally formed structure and comprises a wrapping portion, a plurality of copying reinforcing pieces and a plurality of locking pieces, the wrapping portion is sleeved on the tail end of the clamping portion, the copying reinforcing pieces are arranged on the plurality of elastic pieces in a covering mode, and the locking pieces are matched with the clamping portion to be fixed.

2. A low cost high current flat terminal structure as claimed in claim 1, wherein said spring plate has a concave contact portion in the middle.

3. A low cost high current flat terminal structure as claimed in claim 1, wherein one said contoured stiffener is placed over one or more of said resilient tabs.

4. A low cost high current flat terminal structure as claimed in claim 1, wherein said spring plate has a plurality of sub spring plates at its ends.

5. A low cost high current flat terminal structure as claimed in claim 4, wherein said sub-spring plate has a raised portion at its end.

6. A low cost high current flat terminal structure as claimed in any one of claims 1 to 5, wherein a bent portion is provided between said clamping portion and said connecting portion, so that said connecting portion after bending is formed into an overlapping shape.

7. A low cost high current flat terminal structure according to claim 6, wherein said clamping portion, bending portion and connecting portion are integrally formed.

8. A low cost large current flat terminal structure as claimed in claim 7, wherein said clamping portion and contact member are 90 °, said clamping portion is a U-shaped clip, said covering portion is a U-shaped plate, said covering portion covers the end of said clamping portion, said locking portion is a pair of first locking grooves, said locking member includes a pair of first locking pieces and a pair of second locking pieces, said first locking pieces and said second locking pieces are respectively disposed on both sides of said covering portion, a pair of said first locking pieces are locked into a pair of said first locking grooves, and said second locking pieces are pressed against the clamping portion and fixed on the side away from said connecting portion.

9. A low cost high current flat terminal structure as claimed in claim 8, wherein a reinforcing region is provided between said clamping portion and said connecting portion.

10. The structure of claim 7, wherein the clamping portion and the contact member are 180 °, the clamping portion is a lamination clip, the covering portion is an annular sleeve, the covering portion is sleeved around the clamping portion, the locking portion is a second locking groove, the locking member comprises a third locking plate and a plurality of fourth locking plates, the third locking plate and the fourth locking plate are arranged on the same side of the covering portion, the third locking plate is clamped into the second locking groove and fixed, and the top contact bending portion of the plurality of fourth locking plates is fixed.