WO2023123623A1

WO2023123623A1 - Contact terminal, electric connector and electronic device

Info

Publication number: WO2023123623A1
Application number: PCT/CN2022/076271
Authority: WO
Inventors: 白云华; 汪晓华
Original assignee: 深圳连信精密技术有限公司
Priority date: 2021-12-30
Filing date: 2022-02-15
Publication date: 2023-07-06
Also published as: CN114374108A; CN114374108B

Abstract

Disclosed in the present invention is a contact terminal, comprising a support and a plurality of contact pieces. The plurality of contact pieces are strung together by means of the support, such that the plurality of contact pieces form an annular structure. Each contact piece comprises a first elastic arm, a second elastic arm and a third elastic arm, wherein the first elastic arm is located in the middle of the contact piece and located on an inner side of the annular structure; the second elastic arm and the third elastic arm are located at two ends of the contact piece; and the support penetrates into the second elastic arm and the third elastic arm. Further disclosed in the prevent invention are an electric connector comprising the contact terminal, and an electronic device. An assembled spring-type contact piece design is used in the embodiments of the present invention, and thus it can be ensured that the other contact pieces can still be in effective contact even when the disconnection of a single piece occurs, thereby ensuring the reliability of a contact scheme; in addition, the contact area can also be increased, thereby effectively reducing the contact resistance; and the characteristic of a low insertion and withdrawal force of a wire spring is provided while a current carried by the terminal is increased, thereby achieving the dual purposes of improving the current-carrying capability and prolonging the service life.

Description

Contact terminals, electrical connectors and electronic equipment

technical field

The invention relates to the technical field of connectors, in particular to a contact terminal, an electrical connector and electronic equipment.

Background technique

With the needs of social development, more stringent requirements are put forward for electrical connectors, which are mainly reflected in two aspects: First, the requirements for the current carrying capacity of terminals (male terminals and female terminals) are higher, especially for energy storage and new connectors. Energy and other application scenarios that have high requirements for product weight and size; Second, there are higher requirements for the service life of terminals, such as battery replacement technology or new energy charging connectors and other application scenarios that require frequent plugging and unplugging.

In the torsion spring scheme, its core component is an integrated copper alloy stamping shrapnel, and then uses processes such as rounding and twisting to make the contact surface form a twisted hyperboloid to increase the contact area to meet the current carrying requirements of the terminal.

technical problem

The contact terminals are stamped and formed in one piece, which leads to a large insertion force of the male and female terminals, a short service life of the terminals, and a low fault tolerance rate of the terminals.

The core component of the wire spring scheme is a copper alloy wire wound on a ring-shaped copper sheet support. The copper alloy wire can improve the width and spacing of the torsion spring stamping shrapnel, reduce the insertion and withdrawal force of the terminal, and improve the service life of the terminal. However, the wire spring generally uses a wire to wind the contact piece. If a disconnection occurs during use, the entire contact piece will be scattered and the contact will no longer be reliable.

technical solution

The purpose of the present invention is to provide a contact terminal, an electrical connector and an electronic device to ensure the reliability of the contact scheme.

In order to achieve the above object, the first aspect of the embodiment of the present invention discloses a contact terminal, which includes a bracket and a plurality of contact pieces, and the bracket strings the plurality of contact pieces together so that the plurality of contact pieces Forming a ring structure, the contact piece includes a first elastic arm, a second elastic arm and a third elastic arm, the first elastic arm is located in the middle of the contact piece and is located inside the ring structure, the second elastic arm The arm and the third elastic arm are located at both ends of the contact piece, and the bracket passes through the second elastic arm and the third elastic arm.

As an optional implementation mode, in the first aspect of the embodiment of the present invention, the contact piece is integrally formed, and the first elastic arm, the second elastic arm and the third elastic arm are all wound around a part of the line segment in the contact piece. Formed.

As an optional implementation manner, in the first aspect of the embodiment of the present invention, the contact piece includes a first end portion, a second end portion, a first connection section, a second connection section, a third connection section, and a first connection section. An arc portion and a second arc portion; one end of the first connecting section is wound around to form a first ring and then integrally formed with the first end, and the other end of the first connecting section passes through The first arc part is integrally formed with one end of the second connecting segment, the other end of the second connecting segment is integrally formed with one end of the third connecting segment through the second arc part, and the other end of the third connecting segment is formed integrally. One end is wound around to form a second annular body, and then integrally formed with the second end; the second connecting section and the first arc portion and the second arc portion at both ends form a first elastic arm, so The first annular body and the second annular body respectively constitute a second elastic arm and a third elastic arm.

As an optional implementation manner, in the first aspect of the embodiment of the present invention, both the first arc portion and the second arc portion protrude toward the outside of the first elastic arm.

As an optional implementation manner, in the first aspect of the embodiment of the present invention, the first connection section, the third connection section, the first end and the second end are located in the same plane, and the second connection segment is parallel to the first connecting segment.

As an optional implementation manner, in the first aspect of the embodiment of the present invention, the first elastic arm is C-shaped, and the second elastic arm and the third elastic arm are circular or oval.

As an optional implementation mode, in the first aspect of the embodiment of the present invention, there are two brackets, which respectively pass through the second elastic arm and the third elastic arm, and the brackets are provided with a fracture, the Compatible inclined surfaces are arranged on the support end surfaces on both sides of the fracture.

The second aspect of the embodiment of the present invention discloses an electrical connector, which includes a female terminal body, a plug, and the contact terminal described in the first aspect of the embodiment of the present invention, the contact terminal is installed in the female terminal body, The plug cooperates with the female terminal body and is used to block the contact terminal so as to limit the movement of the contact terminal in the vertical direction of the female terminal body.

As an optional implementation manner, in the second aspect of the embodiment of the present invention, an accommodating space is opened in the female terminal body, the contact terminal is installed in the accommodating space, and the shape of the bracket is the same as The shape of the accommodating space is matched.

The third aspect of the embodiment of the present invention discloses an electronic device, which includes the electrical connector described in the second aspect of the embodiment of the present invention.

Beneficial effect

Compared with the prior art, the beneficial effects of the present invention are:

1. The design of the assembled spring-type contact piece can ensure that even if a single piece is disconnected, other contact pieces can still be in effective contact to ensure the reliability of the contact scheme.

2. The design of the assembled spring-type contact piece increases the contact area and effectively reduces the contact resistance. While increasing the current carrying capacity of the terminal, it also has the characteristics of low insertion and withdrawal force of the wire spring, so as to increase the current carrying capacity and improve the use The dual purpose of life.

3. There are fewer parts in the overall contact scheme, and the assembly process is easy to realize fully automated assembly, so as to meet the needs of production capacity and price.

Description of drawings

FIG. 1 is a schematic structural diagram of a contact terminal according to Embodiment 1 of the present invention;

Fig. 2 is a structural schematic diagram of one direction of the contact piece of the present invention;

Fig. 3 is a structural schematic diagram of another direction of the contact piece of the present invention;

Fig. 4 is the schematic structural view of the bracket of the present invention;

FIG. 5 is a schematic structural diagram of a female terminal of an electrical connector according to Embodiment 2 of the present invention;

6 is a schematic diagram of an exploded structure of the female terminal of the electrical connector of the present invention;

Fig. 7 is a cross-sectional view of the female terminal of the electrical connector of the present invention.

In the figure: 10, female terminal body; 20, contact terminal; 21, contact piece; 211, first elastic arm; 2111, first arc portion; 2112, second connecting section; 2113, second arc portion; 2114 , the third connecting section; 2115, the first connecting section; 212, the second elastic arm; 2121, the first end; 2122, the first annular body; 213, the third elastic arm; 2131, the second end; 2132 , the second annular body; 22, the bracket; 30, the plug.

Embodiments of the present invention

Below, the present invention will be further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of not conflicting, the various embodiments described below or the technical features can be combined arbitrarily to form new embodiments. . Unless otherwise specified, the materials and equipment used in this embodiment can be purchased from the market. Examples of the described embodiments are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary, and are only for explaining the present application, and are not understood to limit the present application.

In the description of this application, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", The orientation or positional relationship indicated by "outside" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, constructed and operated in a particular orientation and therefore should not be construed as limiting the application. In the description of the present application, "plurality" means two or more, unless otherwise specified precisely.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected", "communicated", and "connected" should be understood in a broad sense, for example, it can be fixedly connected or through an intermediary The connection between media can be the internal communication of two elements or the interaction relationship between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

The terms "comprising" and "having" in the specification and claims of the present application and the above drawings, as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, A system, product or device is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to the process, method, product or device.

Embodiment one

Contact terminals, which are used in electrical connectors. 1-4, the contact terminal 20 mainly includes a bracket 22 and a contact piece 21, wherein there are multiple contact pieces 21, and the contact pieces 21 are strung together through the bracket 22, so that the contact terminal 20 has a ring structure as a whole.

The contact piece 21 is preferably formed by winding a spring machine, and the wound contact piece is provided with a first elastic arm 211, a second elastic arm 212 and a third elastic arm 213, wherein the first elastic arm 211 is located at the bottom of the contact piece 21. The middle part is located on the inner side of the ring structure, the second elastic arm 212 and the third elastic arm 213 are respectively located at both ends of the contact piece 21, and the first elastic arm 211 is used for plugging with the male terminal to realize the function of an electrical connector. It can be seen that in When the male terminal is plugged into the contact terminal 20 , it is in contact with the first elastic arms 211 of all the contact pieces 21 . The design of assembled spring-type contact pieces 21 (each contact piece 21 is similar to a spring individual) can ensure that even in the case of a single piece of wire breakage, other contact pieces 21 can still be in effective contact, ensuring the reliability of the contact scheme .

In some other embodiments, the contact sheet can also be made in other ways, for example, by stamping.

On the one hand, the second elastic arm 212 and the third elastic arm 213 are used to cooperate with the bracket 22 to complete the assembly of the contact terminal 20; 212 and the third elastic arm 213 are also used to interfere with the inner wall of the female terminal body during assembly. It can be understood that the second elastic arm 212 and the third elastic arm 213 have a certain degree of elasticity, which can adjust the male terminal and Insertion force between receptacles.

The first elastic arm 211 preferably adopts a C-shaped structure, and the two ends of the C-shaped structure are in the shape of an arc protruding outward. service life.

The second elastic arm 212 and the third elastic arm 213 can be circular or elliptical, and when in contact with the female terminal body, the outer space of the circle or ellipse can be reasonably used to increase the contact point between the female terminal body and the contact piece 21, Make the contact resistance smaller and improve the current carrying capacity of the product.

The initial contact piece 21 can be a section of cylindrical conductive material, which is wound by a spring machine to form a first elastic arm 211 , a second elastic arm 212 and a third elastic arm 213 . It can be understood that the final formed contact piece 21 is also an integrally formed structure. Of course, it can also be fixed together by means of multi-segment conductive material fixed connection such as welding, thermocompression connection, etc., regardless of the cost.

2 and 3, the initial contact piece 21 can be divided into a first end portion 2121, a second end portion 2131, a first connecting section 2115, a second connecting section 2112, and a third connecting section 2114. And the first arc portion 2111 and the second arc portion 2113, wherein the first arc portion 2111 and the second arc portion 2113 form an arc structure by winding.

One end of the first connecting section 2115 is wound around to form a first annular body 2122 and then integrally formed with the first end portion 2121, and the other end of the first connecting section 2115 is connected to the second end through the first arc portion 2111. One end of the connecting section 2112 is integrally formed, the other end of the second connecting section 2112 is integrally formed with one end of the third connecting section 2114 through the second arc portion 2113, and the other end of the third connecting section 2114 is wound The second ring-shaped body 2132 is integrally formed with the second end 2131 after one circle; the second connecting section 2112 and the first arc-shaped portion 2111 and the second arc-shaped portion 2113 at both ends constitute the first elastic arm 211 , the first annular body 2122 and the second annular body 2132 form the second elastic arm 212 and the third elastic arm 213 respectively.

Both the first arc portion 2111 and the second arc portion 2113 protrude toward the outside of the first elastic arm 211 , and one round of winding can also be completed by winding or stamping.

In a preferred embodiment of the present invention, the first connecting section 2115, the second connecting section 2112, the third connecting section 2114, the first end 2121 and the second end 2131 can all be linear sections, and the first connecting section 2115 , the third connecting section 2114 , the first end 2121 and the second end 2131 are located in the same plane, and the second connecting section 2112 is parallel to the first connecting section 2115 .

Of course, in other embodiments, the first connecting section 2115, the second connecting section 2112, the third connecting section 2114, the first end portion 2121 and the second end portion 2131 can also be set to slightly present a certain arc. line segment.

It can be understood that the bracket 22 strings the contact pieces 21 together so that the contact terminal 20 has a ring structure, so the bracket 22 should also have a ring structure. The bracket 22 is set according to the shape of the space for accommodating the contact terminal 20 inside the female terminal body, and may be circular, rectangular or other shapes, which are not limited here.

There are two brackets 22 , which pass through the second elastic arm 212 and the third elastic arm 213 respectively. Fractures are provided on the bracket 22, so that the number of contact pieces 21 of the entire contact terminal 20 can be adjusted within a certain range to ensure the reliability of the connection. In a preferred embodiment of the present invention, the end surfaces of the brackets 22 on both sides of the fracture are inclined surfaces.

Embodiment two

Embodiment 2 shows a structure of an electrical connector, which mainly includes a female terminal of the electrical connector. Please refer to FIGS. 5-7 , which show a cylindrical connector female terminal, and connector female terminals of other shapes are similar thereto. The connector female terminal includes a female terminal body 10 , a contact terminal 20 and a plug 30 .

Wherein, there is an accommodating space inside the female terminal body 10, the contact terminal is installed in the accommodating space, and the plug 30 is blocked at the end of the accommodating space, which is used to prevent the contact terminal from moving axially in the female terminal body 10. sports.

According to the shape of the interface formed by plugging between the male terminal and the female terminal, design the shape of the accommodation space and the bracket. For example, the bracket can be designed into circular, oval, rectangular, and other special-shaped structures according to the shape of the interface to be presented. In some high-current scenarios, the bracket can also be made into a flat rectangle or a rectangular structure with a certain curvature at the four corners. It can be understood that the bracket is adapted to the shape of the accommodation space.

The contact terminal can adopt the structural form of the first embodiment. FIG. 7 shows that the second elastic arm and the third elastic arm of the contact piece abut against the inner wall of the housing space, that is, the female terminal body 10 .

The mating structure of the plug 30 and the female terminal body 10 may be threaded connection, buckle connection or card connection. In a preferred embodiment of the present invention, for example, the plug 30 connected by thread, after the plug 30 is rotated, the plug 30 is connected to the female terminal body 10, and the lower end surface of the plug 30 abuts against the contact terminal .

The plug 30 is a hollow structure, so as to ensure that the male terminal can pass through the plug 30 and contact with the contact terminal. A groove may be provided on the inner wall of the plug 30 along the axial direction of the plug 30 for convenient rotation of the plug 30 .

Its processing and assembly process is as follows: first wind and form single-piece contact pieces, electroplate these contact pieces, then wind and form brackets and electroplate the brackets, arrange the contact pieces according to the number, and insert these contact pieces through the brackets. The processing and assembly of the contact terminal is completed in the second elastic arm and the third elastic arm of the sheet, and then the contact terminal is inserted into the accommodation space of the female terminal body 10, and the plug 30 is installed to complete the assembly of the entire electrical connector female terminal. Assemble.

In some other embodiments, a plug 30 may also be provided at the other end of the female terminal body 10 instead of providing a step at the bottom of the accommodating space in the present invention.

Embodiment Three

Embodiment 3 discloses an electronic device, which can be any electrical device or power supply device with the above-mentioned electrical connector (the mating structure of the female terminal of the electrical connector and the male terminal not shown in Embodiment 2) etc., of course, in some embodiments, it may also be an electronic device that realizes signal transmission through the above-mentioned electrical connector.

Finally, it should be noted that: the above-mentioned embodiment is only an optional embodiment of the present invention, which cannot limit the scope of protection of the present invention. Changes and substitutions all belong to the scope of protection claimed by the present invention.

Claims

A contact terminal, characterized in that it includes a bracket and a plurality of contact pieces, the bracket strings the plurality of contact pieces together so that the plurality of contact pieces form a ring structure, and the contact piece includes a first An elastic arm, a second elastic arm and a third elastic arm, the first elastic arm is located in the middle of the contact piece and is located inside the ring structure, the second elastic arm and the third elastic arm are located in the contact The two ends of the sheet, the bracket passes through the second elastic arm and the third elastic arm.
The contact terminal according to claim 1, wherein the contact piece is integrally formed, and the first elastic arm, the second elastic arm and the third elastic arm are formed by winding a part of a wire segment in the contact piece.
The contact terminal according to claim 1, wherein the contact piece comprises a first end portion, a second end portion, a first connecting segment, a second connecting segment, a third connecting segment, and a first arc portion and The second arc portion; one end of the first connecting section is wound around to form a first ring and integrally formed with the first end, and the other end of the first connecting section passes through the first arc portion integrally formed with one end of the second connecting segment, the other end of the second connecting segment is integrally formed with one end of the third connecting segment through a second arc, and the other end of the third connecting segment is wound around After forming the second annular body, it is integrally molded with the second end; the second connecting section and the first arc portion and the second arc portion at both ends constitute a first elastic arm, and the first annular body The body and the second annular body constitute the second elastic arm and the third elastic arm respectively.
The contact terminal according to claim 3, wherein both the first arc portion and the second arc portion protrude toward the outside of the first elastic arm.
The contact terminal according to claim 3, wherein the first connection section, the third connection section, the first end and the second end are located in the same plane, and the second connection section and the first connection segment parallel.
The contact terminal according to any one of claims 1-5, wherein the first elastic arm is C-shaped, and the second elastic arm and the third elastic arm are circular or oval.
The contact terminal according to any one of claims 1-5, characterized in that there are two brackets, respectively passing through the second elastic arm and the third elastic arm, the bracket is provided with a fracture, the Compatible inclined surfaces are arranged on the support end surfaces on both sides of the fracture.
An electrical connector, characterized in that it comprises a female terminal body, a plug, and the contact terminal according to any one of claims 1-7, the contact terminal is installed in the female terminal body, and the plug Cooperating with the female terminal body, it is used to block the contact terminal, so as to limit the movement of the contact terminal in the vertical direction of the female terminal body.
The electrical connector according to claim 8, wherein an accommodating space is opened in the female terminal body, the contact terminal is installed in the accommodating space, and the shape of the bracket is consistent with the accommodating space. Compatible with the shape of the space.
An electronic device, characterized in that it comprises the electrical connector according to claim 8 or 9.