CN216161966U

CN216161966U - Secondary injection molding electric connector

Info

Publication number: CN216161966U
Application number: CN202121150355.0U
Authority: CN
Inventors: 周志恒; 陈建国; 唐林丁; 邝志辉
Original assignee: GAC Component Co Ltd
Current assignee: GAC Component Co Ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-04-01
Anticipated expiration: 2031-05-26

Abstract

The utility model discloses a secondary injection molding electric connector, which comprises a contact pin, wherein the surface of the contact pin is provided with an etching line, the secondary injection molding electric connector also comprises an intermediate and a shell, the intermediate is injected at the end part of the contact pin, the contact pin extends out of the intermediate, the intermediate is provided with an etching surface, the shell is injected on the surface of the intermediate and coats the contact pin and the intermediate, the etching surface is positioned at the connecting part of the intermediate and the shell, the shell is provided with a plugging part, the plugging part is hollow, and the contact pin is partially positioned in the plugging part.

Description

Secondary injection molding electric connector

Technical Field

The utility model relates to an electric connector, in particular to a secondary injection molding electric connector.

Background

Many mechatronics structures on automobiles have high sealing requirements, and the electric connector is an indispensable part of the mechatronics structure. At present, the electric connection adopts more wiring harnesses to be directly thrown out to be connected with a connector mature in application, glue is applied to a joint, and the wiring harnesses are sealed to cause problems and high in cost.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a secondary injection molding electric connector which is good in sealing performance and low in cost.

One of the purposes of the utility model is realized by adopting the following technical scheme:

the utility model provides an electric connector of moulding plastics twice, includes the contact pin, the contact pin surface is equipped with the sculpture, the electric connector of moulding plastics twice still includes midbody and casing, the midbody mould plastics in the contact pin tip, the contact pin is followed the midbody extends out, the midbody is equipped with the sculpture face, the casing mould plastics in midbody surface and cladding the contact pin and the midbody, the sculpture face is located the midbody with the junction of casing, the casing is equipped with grafting portion, grafting portion cavity, the contact pin part is located in the grafting portion.

Furthermore, the intermediate body is provided with ribs which are convex, so that the contact area between the intermediate body and the shell is increased.

Further, the cross section of each rib is triangular.

Further, the pin is made of brass.

Further, the contact pin surface is plated with nickel and is formed nickel-plated layer, and the thickness of nickel-plated layer is 1um-2 um.

Furthermore, the nickel plating layer of the contact pin is plated with tin and forms a tin plating layer, and the thickness of the tin plating layer is 0.5-1.5 um.

Further, the intermediate is made of polycarbonate.

Further, the shell is formed by mixing and injection molding 100:30 parts by mass of PA66 plastic and glass fiber.

Further, the pin part is exposed from the other end of the intermediate body to form a fixing part for clamping the die, and the length of the fixing part is 0.2mm-0.5 mm.

Furthermore, the shell is provided with a first coating area and a second coating area, the first coating area and the second coating area are positions where the shell directly coats the contact pins, and the depth of the first coating area and the depth of the second coating area are 0.7mm-1.3 mm.

Compared with the prior art, the intermediate of the secondary injection molding electric connector is injected at the end part of the contact pin, the shell is injected on the surface of the intermediate and coats the contact pin and the intermediate, the whole electric connector is manufactured by secondary injection molding, and the electric connector is good in sealing performance and low in cost.

Drawings

FIG. 1 is a front view of a two shot electrical connector of the present invention;

FIG. 2 is a cross-sectional view A-A of the two shot electrical connector of FIG. 1;

FIG. 3 is a schematic view of the internal structure of the two-shot electrical connector of FIG. 1;

fig. 4 is a partial cross-sectional view of the two shot electrical connector of fig. 1.

In the figure: 10. inserting a pin; 11. a fixed part; 20. an intermediate; 21. ribs; 22. etching the textured surface; 30. a housing; 31. a plug-in part; 32. a first cladding region; 33. a second cladding region.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 to 4 show a two-shot electrical connector according to the present invention, which includes a plurality of pins 10, a middle body 20 and a housing 30.

The pin 10 is made of brass. The surface of the contact pin 10 is plated with nickel to form a nickel plating layer, and the thickness of the nickel plating layer is 1um-2 um. Specifically, the thickness of the nickel plating layer is 1.5 um. The nickel plating layer of the contact pin 10 is plated with tin and forms a tin plating layer, and the thickness of the tin plating layer is 1 um. The surface of the pin 10 is provided with the texture, so that the contact area between the pin 10 and the intermediate body 20 is increased, and the close contact between the pin 10 and the intermediate body 20 is ensured. The length of the pin 10 is 100mm, which is longer than the conventional pin, so that the length of the pin 10 mounted on the intermediate body 20 and the housing 30 is increased, the connection tightness is increased, and the terminal of the pin 10 is electrically connected with other parts after being bent.

The intermediate body 20 is cast from polycarbonate (type sabic PC940 material). The polycarbonate can ensure adhesion between the intermediate body 20 and the pin 10. The intermediate body 20 covers the end of the pin 10, and during injection molding, the end of the pin 10 is engaged with a mold to position the pin 10, so that the end of the pin 10 protrudes (is not covered) from the intermediate body 20 to form the holding portion 11. The length of the fixing part 11 is 0.2mm-0.5 mm. The plane of the intermediate body 20 is provided with an etching forming etching surface 22, and the etching surface 22 increases the contact area between the intermediate body 20 and the shell 30, so as to ensure the close contact between the intermediate body 20 and the shell 30. The middle body 20 is also provided with ribs 21, the ribs 21 extend on the surface of the middle body 20, and the cross section of each rib 21 is triangular. The ribs 21 increase the contact area between the intermediate body 20 and the shell 30, and ensure the close contact between the intermediate body 20 and the shell 30.

The shell 30 is formed by mixing and injection molding 100:30 parts of PA66 plastic and glass fiber. The housing 30 covers the pin 10 and the intermediate body 20. The housing 30 is provided with a first coating region 32 and a second coating region 33. The first coating region 32 and the second coating region 33 are portions of the shell 30 directly coating the pins 10, and the depth of the first coating region 32 and the second coating region 33 is 0.7mm-1.3 mm. The housing 30 is further provided with a plug part 31, the plug part 31 is a hollow structure, and the pin 10 is located in the plug part 31.

According to the secondary injection molding electric connector, the existing wire harness and wire harness sealing structure are omitted, the contact pin 10, the intermediate body 20 and the shell 30 are tightly connected by adopting the secondary injection molding structure, the connection strength after injection molding can be enhanced by arranging the ribs 21 and the etched surfaces 22, the integral waterproof grade of the connector meets the requirement of IP67, and poor sealing caused by the failure of a sealing rubber ring of a male-female connector is avoided; meanwhile, the problem of poor sealing of the traditional connector due to water seepage of the wire core is avoided; the cost is reduced.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the spirit of the utility model, and all equivalent modifications and changes can be made to the above embodiments according to the essential technology of the utility model, which falls into the protection scope of the utility model.

Claims

1. The utility model provides an electric connector of secondary moulds plastics, includes the contact pin, its characterized in that: the secondary injection molding electric connector further comprises an intermediate body and a shell, the intermediate body is injected at the end of the contact pin, the contact pin extends out of the intermediate body, the intermediate body is provided with an etched surface, the shell is injected on the surface of the intermediate body and coats the contact pin and the intermediate body, the etched surface is located at the joint of the intermediate body and the shell, the shell is provided with a splicing part, the splicing part is hollow, and the contact pin is partially located in the splicing part.

2. The two shot electrical connector of claim 1, wherein: the intermediate body is provided with ribs which are convex, so that the contact area of the intermediate body and the shell is increased.

3. The two shot electrical connector of claim 2, wherein: the cross section of the rib is triangular.

4. The two shot electrical connector of claim 1, wherein: the pins are made of brass.

5. The two shot electrical connector of claim 4, wherein: the contact pin surface is plated with nickel and is formed the nickel-plated layer, and the thickness of nickel-plated layer is 1um-2 um.

6. The two shot electrical connector of claim 5, wherein: the nickel plating layer of the contact pin is plated with tin to form a tin plating layer, and the thickness of the tin plating layer is 0.5-1.5 um.

7. The two shot electrical connector of claim 1, wherein: the intermediate is made of polycarbonate.

8. The two shot electrical connector of claim 1, wherein: the pin part is exposed from the other end of the intermediate body to form a fixing part for clamping a die, and the length of the fixing part is 0.2mm-0.5 mm.

9. The two shot electrical connector of claim 1, wherein: the shell is provided with a first coating area and a second coating area, the first coating area and the second coating area are used for directly coating the positions of the contact pins, and the depth of the first coating area and the depth of the second coating area are 0.7mm-1.3 mm.