CN218975839U

CN218975839U - Terminal structure with high contact reliability

Info

Publication number: CN218975839U
Application number: CN202223278944.4U
Authority: CN
Inventors: 李建欣; 王英会; 毛鑫; 李闻; 金华军
Original assignee: Tianjin Kewen Industrial Co ltd
Current assignee: Tianjin Kewen Industrial Co ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-05-05
Anticipated expiration: 2032-12-08

Abstract

The utility model relates to a terminal structure with high contact reliability, which comprises a male terminal and a female terminal, wherein a terminal spring piece structure is fixedly arranged in a connecting end cavity of the female terminal in a limiting way, spring pieces are arranged at two opposite sides in the terminal spring piece structure, the spring pieces at two sides are equally divided into two pieces, and each spring piece is provided with two contacts. The structure is provided with eight contact points in total of four elastic sheets, and the current carrying capacity of the terminal is remarkably improved. The floating arc structure at the root of each elastic sheet can absorb the relative movement of the male terminal and the female terminal at the contact point caused by vibration when a vehicle runs, thereby effectively weakening the damage to products caused by fretting corrosion. The current carrying capacity of the terminal with the new structure is improved by more than 12% compared with that of the terminal with the same specification through the test, and the resistance of the contact point position of the male terminal and the female terminal is reduced by more than 50% compared with that of the terminal with the original structure after the long-time fretting corrosion.

Description

Terminal structure with high contact reliability

Technical Field

The utility model belongs to the field of terminal structures, and particularly relates to a terminal structure with high contact reliability.

Background

With the increasing demand for low carbonization, stringent carbon emission regulations are established in the global primary automotive market. Automobile manufacturing technology, cost and the like face increasing challenges, and the weight reduction of the whole automobile has become a necessary trend. Terminals are also being made to be lightweight and compact as an essential component of automobile harnesses. The small terminals are not limited to the signal circuits used in micro-currents, and the power terminals are gradually miniaturized, so that the current carrying capacity of the small terminals is challenging. How to improve the current carrying capacity of a small terminal is an important issue for the development of miniaturization.

At present, in a common tin plating terminal, the current carrying capacity of the terminal pair is continuously reduced because the contact point resistance is improved due to fretting friction in use, so that the fretting friction corrosion is reduced while the current carrying capacity is improved.

Technical term interpretation:

terminal: the members of the battery connected to the external conductor are generally male and female pairs.

Contact point: when the male terminal and the female terminal are matched, the elastic piece of the female terminal is contacted with the contact part of the male terminal.

Fretting corrosion: when the terminal is used, the contact point position of the male terminal and the female terminal can generate relative motion (micron-sized relative displacement) of microwaves due to vibration and inertia, and the contact surface of the contact point is oxidized due to long-time relative motion, so that the resistance is increased. This phenomenon is called fretting corrosion and is common on tin plated surfaces.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a terminal structure with high contact reliability, which improves poor current carrying capacity of a terminal and improves contact reliability.

The utility model solves the technical problems by adopting the following technical scheme:

the utility model provides a terminal structure with high contact reliability, includes public terminal and female terminal, its characterized in that: the terminal spring plate structure is fixedly arranged in the connecting end cavity of the female terminal in a limiting mode, spring plates are arranged on two opposite sides in the terminal spring plate structure, the spring plates on two sides are equally divided into two, and each spring plate is provided with two contacts.

Moreover, the root of the elastic sheet is provided with a floating arc structure.

Moreover, the terminal shell fragment structure includes terminal socket, goes up shell fragment and down the shell fragment, the terminal socket be with public terminal external diameter complex square frame, the upper edge of terminal socket axial one end system has two to go up the shell fragment side by side, the lower edge of terminal socket axial one end system has two to go down the shell fragment side by side, go up shell fragment and lower shell fragment and be cantilever structure, upward shell fragment is made in proper order from the root to the free end at last shell fragment has bellied floating circular arc structure, A contact and B contact downwards, lower shell fragment has upwards bellied floating circular arc structure, A contact and B contact from the root to the free end system in proper order.

And an outer spring plate is fixedly arranged at the upper end of the terminal socket, the outer spring plate is lifted in a cantilever mode, an upper limit bulge is formed at the root of the outer spring plate, and the upper limit bulge corresponds to the outer side of the contact A of the upper spring plate.

The female terminal comprises a connecting end cavity, a stop block and a female terminal tail, wherein the connecting end cavity is a rectangular cavity formed by a bottom plate, a left side wall and a right side wall, the connecting end cavity and the female terminal tail are coaxially connected into a whole, a limiting structure connected with an elastic sheet structure is arranged at the front end of the connecting end cavity, the stop block is arranged above the rear part of the connecting end cavity, and the stop block limits the opening angle of the upper elastic sheet.

And a lower limit bulge is arranged on the bottom plate of the connecting end cavity, and the lower limit bulge corresponds to the outer side of the contact A of the lower elastic sheet.

The utility model has the advantages and positive effects that:

the structure is provided with eight contact points in total of four elastic sheets, and the current carrying capacity of the terminal is remarkably improved. The floating arc structure at the root of each elastic sheet can absorb the relative movement of the male terminal and the female terminal at the contact point caused by vibration when a vehicle runs, thereby effectively weakening the damage to products caused by fretting corrosion. The current carrying capacity of the terminal with the new structure is improved by more than 12% compared with that of the terminal with the same specification through the test, and the resistance of the contact point position of the male terminal and the female terminal is reduced by more than 50% compared with that of the terminal with the original structure after the long-time fretting corrosion.

Drawings

FIG. 1 is a schematic diagram of a male terminal to female terminal connection;

fig. 2 is a schematic view of a female terminal structure;

FIG. 3 is a schematic diagram of a spring structure;

fig. 4 is a schematic side view of the present fuse box.

Detailed Description

The utility model will now be described in further detail by way of specific examples, which are given by way of illustration only and not by way of limitation, with reference to the accompanying drawings.

The utility model provides a terminal structure with high contact reliability, includes public terminal 1 and female terminal 3, and spacing solid dress terminal shell fragment structure 2 in female terminal's the link cavity 3-1, and the relative both sides system has the shell fragment in the terminal shell fragment structure, and the shell fragment of both sides is equallyd divide into two, and this four shell fragments press from both sides the public terminal of symmetrical clamp simultaneously from both sides, and every shell fragment all makes two contacts.

The specific structure is shown in the attached drawings, the terminal spring plate structure comprises a terminal socket 2-1, an upper spring plate 2-4, a lower spring plate 2-5 and an outer spring plate 2-3, the terminal socket is a square outer frame matched with the outer diameter of a male terminal, two upper spring plates are arranged in parallel at the upper edge of one axial end of the terminal socket, two lower spring plates are arranged in parallel at the lower edge of one axial end of the terminal socket, the upper spring plate and the lower spring plate are of cantilever structures, a floating arc structure 2-8, an A contact 2-6 and a B contact 2-7 which are downwards protruded are sequentially arranged at the upper spring plate from the root to the free end, and a floating arc structure, an A contact and a B contact which are upwards protruded are sequentially arranged at the lower spring plate from the root to the free end;

each elastic sheet is provided with 2 contact points, after the male terminal is inserted, the A, B contact points are contacted with the male terminal successively, and the total of eight contact points are formed by the four elastic sheets, so that according to the principle of electric contact, the more the contact points are, the higher the actual current carrying capacity of the terminal is, and the current carrying capacity of the terminal is obviously improved.

The floating arc structure at the root of each elastic sheet can absorb the relative movement of the male terminal and the female terminal at the contact point caused by vibration when a vehicle runs, thereby effectively weakening the damage to products caused by fretting corrosion. For example: when the male terminal is jogged left, the floating arc deformation enables the elastic sheet to be jogged left along with the movement of the male terminal, so that the relative movement at the contact point position is avoided.

An outer spring piece 2-3 is fixedly arranged at the upper end of the terminal socket, the outer spring piece is lifted in a cantilever mode, an upper limit protrusion 2-2 is arranged at the root of the outer spring piece, the upper limit protrusion corresponds to the outer side of an A contact of the upper spring piece, the moving range of the upper spring piece is limited, and the contact force between the terminals is ensured.

The female terminal comprises a connecting end cavity 3-1, a stop block 3-2 and a female terminal tail 3-3, wherein the connecting end cavity is a rectangular cavity formed by a bottom plate and left and right side walls, the connecting end cavity and the female terminal tail are coaxially connected into a whole, a limiting structure connected with an elastic sheet structure is arranged at the front end of the connecting end cavity, the stop block 3-2 is arranged above the rear part of the connecting end cavity, and the stop block limits the opening angle of the upper elastic sheet;

a lower limit bulge 3-4 is arranged on the bottom plate of the connecting end cavity, and the lower limit bulge corresponds to the outer side of the contact A of the lower elastic sheet to limit the moving range of the elastic sheet.

Although the embodiments of the present utility model and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the utility model and the appended claims, and therefore the scope of the utility model is not limited to the embodiments and the disclosure of the drawings.

Claims

1. The utility model provides a terminal structure with high contact reliability, includes public terminal and female terminal, its characterized in that: the terminal spring plate structure is fixedly arranged in the connecting end cavity of the female terminal in a limiting mode, spring plates are arranged on two opposite sides in the terminal spring plate structure, the spring plates on two sides are equally divided into two, and each spring plate is provided with two contacts.

2. The terminal structure with high contact reliability according to claim 1, characterized in that: the root of the elastic sheet is provided with a floating arc structure.

3. The terminal structure with high contact reliability according to claim 1, characterized in that: the terminal spring plate structure comprises a terminal socket, an upper spring plate and a lower spring plate, wherein the terminal socket is a square outer frame matched with the outer diameter of a male terminal, two upper spring plates are arranged on the upper edge of one axial end of the terminal socket in parallel, two lower spring plates are arranged on the lower edge of one axial end of the terminal socket in parallel, the upper spring plate and the lower spring plate are of cantilever structures, a floating arc structure, an A contact and a B contact which are downwards protruding are sequentially arranged on the upper spring plate from the root to the free end, and an upwards protruding floating arc structure, an A contact and a B contact are sequentially arranged on the lower spring plate from the root to the free end.

4. A terminal structure with high contact reliability according to claim 3, characterized in that: an outer spring plate is fixedly arranged at the upper end of the terminal socket, the outer spring plate is tilted in a cantilever mode, an upper limit bulge is arranged at the root of the outer spring plate, and the upper limit bulge corresponds to the outer side of the contact A of the upper spring plate.

5. A terminal structure with high contact reliability according to claim 3, characterized in that: the female terminal comprises a connecting end cavity, a stop block and a female terminal tail, wherein the connecting end cavity is a rectangular cavity formed by a bottom plate and left and right side walls, the connecting end cavity and the female terminal tail are coaxially connected into a whole, a limiting structure connected with an elastic sheet structure is arranged at the front end of the connecting end cavity, the stop block is arranged above the rear part of the connecting end cavity, and the stop block limits the opening angle of the upper elastic sheet.

6. A terminal structure with high contact reliability according to claim 3, characterized in that: a lower limit bulge is arranged on the bottom plate of the connecting end cavity, and the lower limit bulge corresponds to the outer side of the contact A of the lower elastic sheet.