CN109980398A - A kind of electric connector contact structure - Google Patents

Abstract

The invention discloses a contact piece structure of an electrical connector, which aims to realize that the contact piece of the connector can carry a larger current and effectively reduce the temperature rise. The inner wall surface of the socket base is provided with a closed-loop second elastic connecting piece, and the first elastic connecting piece is in contact with the second elastic connecting piece in a non-axial direction after being axially stressed; the structure of the present invention In the electrical connection, it is equivalent to adding a parallel circuit for the throat of the elastic contact to pass through the ring spring to the socket base to complete the current transfer. In this scheme, a parallel circuit is added to divide the current, thereby reducing the temperature rise and greatly improving Electrical contact reliability performance.

Description

An electrical connector contact structure

technical field

The invention relates to the field of electrical connectors, in particular to a contact structure of an electrical connector.

Background technique

One of the structural forms of the electrical connector contacts is the plug-in type, in which elastic contacts are installed in the jacks. The elastic contact piece is formed by stamping and winding the strip, and the structure can be a crown spring, a torsion spring, a torsion spring, etc. There is a minimum diameter in the middle of the elastic contact piece, that is, a throat neck. When the plug is inserted into the socket, the pin, the elastic contact piece, and the base body of the socket are attached to realize elastic contact connection. The current passes through the throat of the elastic contact piece through the pin, and is transmitted to both ends of the elastic contact piece to the socket base to complete the current transmission.

The existing connectors generally have two structures. One structure is to use a groove on the inner wall surface of the socket base, and a ring spring structure is set in the groove. The second structure uses a groove along the socket base. The axis is provided with a rotating spring, and both structures can currently meet some performance requirements and are widely used. However, at present, after the electrical connection between the two structures, there are still technical defects when the current flows. For example, the socket components of the ring spring structure may be damaged by straining, deformation, and fracture of the spring wire during the plugging and unplugging process. Seriously may cause the connection to fail. When a large current is loaded, the temperature rise of the reed-spring structure jack assembly is extremely high, and the product performance cannot meet the customer's requirements. In the current series of mass-produced products of new energy vehicle charging guns, the above-mentioned problems exist in this type of structure, which brings security risks to the use.

SUMMARY OF THE INVENTION

The purpose of the present invention is to design a new jack assembly structure on the basis of the prior art, so that the connector contacts can carry larger currents and effectively reduce the temperature rise.

In order to achieve the above object, the present invention adopts the following technical solutions:

A contact piece structure of an electrical connector comprises a socket base and a first elastic connecting piece arranged along an axis in the socket base, a closed-loop second elastic connecting piece is arranged on the inner wall of the socket base, and the first elastic connecting piece is arranged on the inner wall of the socket base. After being stressed, an elastic connecting piece is connected with the second elastic connecting piece in a non-axial direction reliably.

In the above technical solution, the first elastic connecting member includes two connecting ends and a plurality of elastic bodies connected between the two connecting ends.

In the above technical solution, the plurality of elastic bodies are formed into a coiled shape after connecting the connecting ends.

In the above technical solution, the second elastic connecting piece is ring-sleeved on the first elastic connecting piece and is in contact with the inner wall of the socket base.

In the above technical solution, the inner wall surface of the socket base is provided with an annular groove along the non-axial direction for arranging the second elastic connecting piece, the second elastic connecting piece is arranged in the annular groove, and the first connecting elastic connecting piece is inserted into the annular groove. through the second elastic connector.

In the above technical solution, there is not less than one annular groove on the inner wall surface of the socket, and each annular groove is provided with an independent second elastic connecting piece.

In the above technical solution, the inner wall surface of the socket base is a smooth wall surface, and the second elastic connecting piece is looped over the first elastic connecting piece.

In the above technical solution, a second elastic connecting piece is sleeved on the outer ring of the first elastic connecting piece, and the second elastic connecting piece is arranged at the center position of the winding shape.

The working principle of the present invention is as follows: the first elastic connecting piece is limited to the base of the jack, when the pin is inserted into the base of the jack, the first elastic connecting piece is subjected to a positive pressure in the diameter direction of the pin, and the first elastic connecting piece is elastically deformed. The neck enlarges and transmits positive pressure to the second elastic connection. The second elastic connecting piece is installed between the elastic connecting piece and the socket base. The second elastic connecting piece has strong elasticity. When it is under the positive pressure of the first elastic connecting piece, the second elastic connecting piece also compresses the first elastic connecting piece. For connectors, the contact area increases, the conductivity increases, and the temperature rise also decreases.

To sum up, due to the adoption of the above-mentioned technical solutions, the beneficial effects of the present invention are:

In the present invention, ring grooves are added in the socket base, and the number of ring grooves is determined by factors such as product structure size and current size. When assembling, a ring spring (second elastic connecting piece) is installed in the socket base first, and then the first elastic connecting piece is loaded, and the original elastic connecting piece becomes an elastic connecting piece plus one or more ring springs. When the plug is inserted into the socket, the pin, the elastic contact piece, the ring spring, and the socket body fit together to realize elastic connection. The current passes through the throat of the elastic contact piece through the pin, and is transmitted to both ends of the elastic contact piece to the socket base. The added parallel loop is that the throat of the elastic contact piece passes through the ring spring to the socket base to complete the current transmission. In this scheme, a parallel circuit is added to divide the current, thereby reducing the temperature rise and improving the electrical performance.

Description of drawings

The invention will be described by way of example and with reference to the accompanying drawings, in which:

1 is a schematic structural diagram of an embodiment of the present invention;

Figure 2 is a schematic structural diagram of an elastic connector;

Fig. 3 is the structural representation of ring spring;

4 is a schematic structural diagram of an embodiment of a ring spring;

5 is a schematic structural diagram of an embodiment of a ring spring;

6 is a schematic structural diagram of an embodiment of a ring spring;

Fig. 7 is the structural representation of socket base;

FIG. 8 is a schematic structural diagram of another embodiment of the present invention

Wherein: 1 is the socket base, 2 is the second elastic connecting piece, and 3 is the first elastic connecting piece.

Detailed ways

All features disclosed in this specification, or all disclosed steps in a method or process, may be combined in any way except mutually exclusive features and/or steps.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), unless expressly stated otherwise, may be replaced by other equivalent or alternative features serving a similar purpose. That is, unless expressly stated otherwise, each feature is but one example of a series of equivalent or similar features.

Example 1

The structure of this embodiment is shown in FIG. 1 , and the entire structure is composed of a socket base, a second elastic connecting piece, and a first elastic connecting piece.

As shown in Figure 7, it is the main body structure of the socket base. On the basis of the existing socket base structure, two annular grooves are arranged on the inner wall along the radial direction. connector. The second elastic connecting piece can be a component with elastic function. As shown in FIG. 3, a ring spring structure can be used. The cross-sectional shape of the ring spring structure can be unlimited, including but not limited to oval (as shown in One of the font type (as shown in FIG. 5 ) and the isosceles triangle (as shown in FIG. 6 ); of course, the second elastic connecting member may also adopt a sheet-like structure with an elastic portion. According to the elastic structures with different shapes, the corresponding ring grooves also use shapes corresponding to the elastic structures, including but not limited to one of ellipse, D-shape, and isosceles triangle.

As shown in FIG. 2 , which is a schematic diagram of the structure of the first elastic connecting piece, the first elastic connecting piece includes two connecting ends, and several elastic bodies are connected between the two connecting ends, and the connecting ends and the elastic body are wound into a Circular structure, the middle part after winding is the throat and neck. The first elastic connecting member may be a rotary spring structure or a drum spring structure.

Several elastic bodies in the first elastic connecting member are isolated from each other, or the elastic bodies are connected by at least one sheet-like belt. All the elastic bodies are not a complete integral structure. , the elastic body can also be provided with a convex portion at the throat and neck portion. The elastic body can be connected between the two connecting ends in any form, for example, using a connection parallel to the winding circular axis, or using an oblique connection deviating from the winding circular axis.

During the winding process, the entire first elastic connecting piece can be wound into a complete closed-loop cylindrical structure, or can be wound into an open-loop cylindrical structure.

The positional relationship between the first elastic connecting piece and the second elastic connecting piece is not unique, the second elastic connecting piece is arranged in the annular groove, the first elastic connecting piece passes through the annular groove, and the first elastic connecting piece can be connected with the second elastic connecting piece When the first elastic connecting piece is inserted into the pin, it will be in reliable contact with the second elastic connecting piece after being expanded by force.

Embodiment 2

As shown in FIG. 8 , the entire structure is composed of a socket base, a second elastic connecting piece, and a first elastic connecting piece.

Improvements are made on the basis of the connection of the first embodiment. The inner surface of the socket base is a smooth surface without any ring grooves. The second elastic connection will be a complete closed-loop structure, and the closed loop will be sleeved on the first elastic connector. , the second elastic connecting piece is in close contact with the first elastic connecting piece in the non-working state. When the first elastic connector is inserted into the pin, the first elastic connector is forced to expand and the second elastic connector is pressed against the inner wall of the socket base.

In the above two embodiments, the purpose of using the first elastic connector and the second elastic connector on the socket base at the same time is to use the second elastic connector to increase the first elastic connector and the socket base during the electrical connection process. The parallel lines between the pins allow the current flowing through the pins to pass through the first elastic connectors and then be shunted by the plurality of second elastic connectors, thereby reducing the temperature rise of the entire connector and greatly improving the electrical contact reliability performance.

The above-mentioned two kinds of embodiments are verified by comparative test:

Test 1: Use the socket base connector without the ring spring, the tail hole is crimped to the 70mm² cable, and the temperature rise of the entire connector is 55K after the current is 250A to thermal equilibrium.

Test 2: The socket base connector with the ring spring added in this embodiment is used. The test method and test conditions are the same as those of Test 1. The temperature rise of the entire connector after thermal equilibrium is 35K.

Comparing the two tests, it can be seen that after the ring spring is added, the temperature rise is significantly reduced, which protects the connector and reduces the potential safety hazard of electrical connection.

The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims (8)

1. a kind of electric connector contact structure, the first elasticity including jack matrix and in jack matrix along axis setting connects Fitting, it is characterised in that the second flexible connector of closed loop is provided on the jack matrix inner wall, first elasticity is even Fitting is connect with the second flexible connector in non axial upper reliable contacts after stress.

2. a kind of electric connector contact structure according to claim 1, it is characterised in that first flexible connector Including two connecting pins and several elastomers being connected between two connecting pins.

3. a kind of electric connector contact structure according to claim 2, it is characterised in that several elastomer connections At rolled behind connecting pin.

4. a kind of electric connector contact structure according to claim 1, it is characterised in that second flexible connector Ring set connects on the first flexible connector with jack matrix inner wall.

5. a kind of electric connector contact structure according to claim 4, it is characterised in that the jack matrix inner wall On along the non axial annular groove being provided with for the second flexible connector to be arranged, the second flexible connector is arranged in annular groove, the One company's flexible connector is inserted through the second flexible connector.

6. a kind of electric connector contact structure according to claim 5, it is characterised in that the receptacle body inner wall Annular groove is no less than one, and independent second flexible connector is provided in each annular groove.

7. a kind of electric connector contact structure according to claim 4, it is characterised in that the jack matrix inner wall For hydraulically smooth surface, the second flexible connector ring set is on the first flexible connector.

8. a kind of electric connector contact structure according to claim 7, it is characterised in that first flexible connector The center of rolled is arranged in one the second flexible connector of exterior ring cap, the second flexible connector.