CN216085437U

CN216085437U - Improved connector capable of preventing metal contact pin from slipping and pulling out

Info

Publication number: CN216085437U
Application number: CN202122306238.5U
Authority: CN
Inventors: 段正刚; 熊双
Original assignee: Suzhou QC Solar Co Ltd
Current assignee: Suzhou QC Solar Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2022-03-18
Anticipated expiration: 2031-09-23

Abstract

The utility model provides an improved connector for preventing a metal contact pin from slipping and pulling out, which comprises a negative connector and a positive connector, wherein the negative connector and the positive connector both comprise a plastic body, a screw cap in threaded connection with the plastic body, and a cable lock catch arranged in the screw cap; the metal contact pin is arranged in the plastic body, and the retaining ring is arranged on the metal contact pin; a sealing ring is arranged at the joint of the positive connector and the negative connector; the retaining ring is of a barrel-shaped structure, and a plurality of tongue piece structures are arranged on the retaining ring. According to the connector, the retaining ring is directly fixed with the metal contact pin of the connector and then is inserted into the plastic body of the connector, the problem of poor installation is avoided during installation, the retaining capability is remarkably improved, the metal contact pin can be prevented from being pulled out by a cable to cause the contact pin to slip from the plastic body, and the connection reliability is high.

Description

Improved connector capable of preventing metal contact pin from slipping and pulling out

Technical Field

The utility model relates to the technical field of electric connectors, in particular to an improved connector capable of preventing a metal contact pin from slipping and pulling out.

Background

With global climate change and the increasing severity of environmental pollution problems caused by traditional fossil energy, the green renewable energy industry has been rapidly developing over the last decade. Solar energy is a renewable resource, and solar cell technology for generating electricity by utilizing photovoltaic effect is well-paid attention by people. The solar cell is made of materials capable of generating photovoltaic effect, such as silicon, gallium arsenide, indium selenium copper and the like, and can convert light energy into electric energy. At present, a photovoltaic module formed by combining a plurality of solar cells is widely used for building various photovoltaic power generation systems or building curtain walls to build energy-saving and environment-friendly buildings.

Photovoltaic power generation system needs to be through the cable conductor with a plurality of photovoltaic module interconnect constitution photovoltaic module array and then outwards carry out big voltage output, and the electric connector is photovoltaic module interconnect's indispensable device. Photovoltaic module connector is inserted and is mother including public inserting, and public inserting all is provided with the metal contact pin fixed with cable conductor connection with the body inside that mother inserted, and the fixed strength of metal contact pin at the inside fixed strength direct decision cable conductor of plastic body and connector. For the electric connector, the loosening of the contact pin is a serious problem, and when the electric connector is installed, a cable needs to be dragged to connect the components into a photovoltaic power generation system, so that sometimes the metal contact pin in the connector can be subjected to a larger pulling force, and therefore, the fixing strength of the metal contact pin in the plastic body of the connector is ensured, and the phenomenon that the metal contact pin is slipped or even pulled out is an important consideration factor in the design and manufacturing process of the connector. The tradition way is design barb structure on metal contact pin, sets up a rand (stopping circle) in the plastic body inside of connector, during the installation, now fills in the plastic body with the rand inside, through the fixed rand of working of plastics, then inserts metal contact pin, and barb structure on the metal contact pin is injectd by the rand, plays the problem that prevents metal contact pin and pull out by the cable conductor so. The structure has some problems, firstly, the clamp is easy to be installed in place, so that the metal contact pin is difficult to insert or cannot achieve the backstop effect; second, metal pin's barb structure is die-cut by the wall thickness material of metal pin itself and forms, and its intensity directly receives the restriction of contact pin wall thickness, and the intensity that is difficult to the barb structure in addition improves, and when external force is great, still can take place barb structure deformation and rand and break away from the phenomenon of contact, influence metal pin at the inside fixed strength of plastic body. Therefore, there is a need for an improved anti-loose structure of metal pin to ensure the reliability of the connector.

SUMMERY OF THE UTILITY MODEL

Aiming at the application requirements of the photovoltaic system connector, the utility model aims to provide an improved connector for preventing a metal contact pin from slipping and pulling out, which can obviously improve the connection reliability of the metal contact pin of the connector and a cable and prolong the service life of the connector.

In order to achieve the purpose of the utility model, the improved connector for preventing the metal contact pin from slipping and pulling comprises a negative connector and a positive connector, wherein the negative connector and the positive connector comprise plastic bodies, screw caps in threaded connection with the plastic bodies, cable lock catches arranged inside the screw caps, the cable lock catches are sleeved on the upper parts of gaskets, and the lower parts of the gaskets are arranged in the plastic bodies; the metal contact pin is arranged in the plastic body, and the retaining ring is arranged on the metal contact pin; a sealing ring is arranged at the joint of the positive connector and the negative connector; the stopping ring is of a barrel-shaped structure, and a plurality of tongue piece structures forming a certain angle with the cylindrical surface of the barrel-shaped body are uniformly arranged on the barrel-shaped body at intervals along the circumferential direction;

the metal contact pin comprises a contact pin body, a cable fixing part and a retaining ring fixing part, wherein the retaining ring fixing part is a neck structure with a smaller outer diameter formed on the metal contact pin, and the retaining ring is sleeved on the retaining ring fixing part; the plastic body is internally provided with a step structure corresponding to the position of the tongue piece structure of the retaining ring, and after the metal contact pin with the retaining ring is inserted, the end part of the tongue piece structure is abutted against the step structure.

Preferably, the included angle between the tongue structure and the cylindrical surface of the barrel-shaped body is 10-30 degrees.

Preferably, the included angle between the tongue structure and the cylindrical surface of the barrel-shaped body is 10-20 degrees.

Still preferably, the number of the tongue structures is at least 3.

Preferably, a reinforcing rib is arranged at the joint of the tongue piece structure and the barrel-shaped body.

Preferably, the retaining ring fixing part is provided with a concave structure, and correspondingly, a protrusion matched with the concave structure is arranged at a corresponding position on the barrel-shaped body of the retaining ring.

Preferably, the outer diameter of the barrel-shaped body of the retaining ring is equal to the outer diameter of the pin body of the metal pin.

Preferably, the retaining ring is fixedly mounted with the metal contact pin through a welding or stamping process.

The improved connector for preventing the metal contact pin from slipping and pulling out is characterized in that the retaining ring is directly fixed with the metal contact pin of the connector and then is inserted into the plastic body of the connector, the metal contact pin and the retaining ring are tightly fixed into a whole, the retaining ring is limited by a step structure in the plastic body, the problem of improper installation cannot occur during installation, the retaining capability is obviously improved, the metal contact pin can be prevented from being pulled out by a cable to cause the contact pin to slip from the plastic body, and the connection reliability is high.

Drawings

The foregoing and other objects, features, and advantages of the utility model will be apparent from the following detailed description taken in conjunction with the accompanying drawings. Wherein:

FIG. 1 is a schematic perspective exploded view of the improved connector of the present invention for preventing a metal pin from slipping and pulling out;

FIG. 2 is a schematic perspective view of a metal pin/sleeve retaining ring of the connector of FIG. 1;

FIG. 3 is a schematic view of the positive insert of the connector of FIG. 1;

FIG. 4 is a schematic view of an assembly structure of the retaining ring of FIG. 2 and the metal insert of FIG. 3 after insertion;

FIG. 5 is a schematic view of the negative connector of the connector of FIG. 1;

FIG. 6 is a schematic cross-sectional view taken along line A-A of FIG. 5;

FIG. 7 is a schematic view of the positive connector of the connector of FIG. 1;

fig. 8 is a schematic cross-sectional view taken along the direction B-B in fig. 7.

In the drawings, part of the element names and reference numerals are as follows:

10. 20-a plastic body; 11. 21-a screw cap; 13. 23-cable locking; 14. 24-a gasket; 12. 22-metal pin/plug bush, 15, 25 backstop ring; 26-drum spring; 102-a sealing ring; 151. 251-a barrel-shaped body; 152. 252-a tongue structure 252; 153. 253-reinforcing ribs.

Detailed Description

The structural features and advantages of the present invention are described in detail below with reference to the accompanying drawings.

Referring to fig. 1, a schematic perspective exploded view of an improved connector for preventing a metal pin from slipping and pulling out according to an embodiment of the present invention is shown, the connector includes a negative connector and a positive connector, the negative connector includes a plastic body 10, a nut 11 in threaded connection with the plastic body 10, a cable lock 13 disposed inside the nut 11, the cable lock 13 is sleeved on an upper portion of a washer 14, and a lower portion of the washer 14 is mounted in the plastic body 10; a metal pin 12 arranged in the plastic body 10 and a retaining ring 15 arranged on the metal pin 12; the positive connector comprises a plastic body 20, a screw cap 21 in threaded connection with the plastic body 20, and a cable lock catch 23 arranged inside the screw cap 21, wherein the cable lock catch 23 is sleeved on the upper part of a gasket 24, and the lower part of the gasket 24 is arranged in the plastic body 20; a metal insert 22 arranged in the plastic body 20, a retaining ring 25 arranged on the metal insert 22, and a drum spring 26 arranged in the metal insert 22; and a sealing ring 102 is arranged at the joint of the positive connector and the negative connector.

Therefore, in this embodiment, for convenience of description, the metal pin in the negative connector is defined as a pin, and the metal pin in the positive connector is defined as a socket, but this application is not limited thereto, and the metal pin in the negative connector may also be defined as a socket, and the metal pin in the positive connector is defined as a pin, which should be regarded as equivalent alternatives; whether referred to as a PIN or a sleeve, is a metal PIN (PIN) of a connector in a broad sense.

In addition, in the embodiment, the structures of the retaining ring and the retaining ring in the positive and negative connectors are similar to the matching structures of the respective metal pins, so that, in the following description, for avoiding redundant description, only the retaining ring and the metal sleeve in the positive connector are taken as examples to specifically describe the structures of the retaining ring and the metal pins with reference to fig. 2 to 4.

Referring to fig. 2, the retaining ring 25 is a barrel-shaped structure, and a plurality of tongue structures 252 forming a certain angle with the cylindrical surface of the barrel-shaped body 251 are uniformly arranged on the barrel-shaped body 251 at intervals along the circumferential direction; referring to fig. 3, the metal insert sleeve 22 of the positive connector includes an insert sleeve body 221, a cable fixing portion 222, and a retaining ring fixing portion 223, the retaining ring fixing portion 223 is a neck structure with a smaller outer diameter formed on the metal insert sleeve 22, and the retaining ring 25 is sleeved on the retaining ring fixing portion 223 (see fig. 4); referring to fig. 8, the inner wall of the plastic body 20 is provided with a step structure 203 at a position corresponding to the tongue structure 252 of the retaining ring 25, and after the metal insert 22 with the retaining ring 25 inserted therein, the end of the tongue structure 252 abuts against the step structure 203 to prevent the metal insert from being pulled out. Similarly, referring to fig. 6, a step structure 103 abutting against the tongue structure 152 of the retaining ring is also formed on the inner side of the plastic body 10 of the negative connector.

In a preferred embodiment, the angle between the tongue structure 252 and the barrel 251 is 10 ° to 30 °, and more preferably, the angle between the tongue structure 252 and the barrel 251 is 10 ° to 20 °. The angle is bigger, and the about firm tensile strength that but tongue structure will reduce of butt of tongue structure and stair structure, consequently, can select reasonable contained angle according to the material strength of metal plug bush itself, the size of plastic body etc.. In another preferred embodiment, there are at least 3 tongue structures.

In another preferred embodiment, in order to improve the deformation resistance of the tongue structure 252, referring to fig. 2, at the junction of the tongue structure 252 and the barrel body 251, a rib 253 is provided, which may be a strip-shaped protrusion directly formed on the metal material through a stamping process.

In another preferred embodiment, referring to fig. 3, the retaining ring fixing portion 223 is formed with a concave structure 2231 at a local position, and correspondingly, a convex structure (not shown) is formed at a corresponding position on the barrel-shaped body of the retaining ring, so that the retaining ring can be prevented from rotating on the metal insert sleeve 22 after the retaining ring is mounted thereon.

In another preferred embodiment, referring to fig. 4, the outer diameter of the barrel-shaped body of the retaining ring is equal to the outer diameter of the plug body of the metal plug bush. When the anti-backing ring is installed, the anti-backing ring can be fixedly installed with the metal plug bush through a welding or stamping process. For example, before the retaining ring 25 is installed, the butt seam 254 is in an unwelded state, and after the retaining ring is sleeved on the metal plug bush, the butt seam 254 is welded to fix the metal plug bush; or the retaining collar may be secured to the metal insert by a stamping process.

The present invention is not limited to the embodiments described above, and those skilled in the art may make modifications or changes within the scope of the disclosure without departing from the spirit of the present invention, so that the scope of the present invention is defined by the appended claims.

Claims

1. The improved connector capable of preventing the metal contact pin from slipping and pulling out is characterized by comprising a negative connector and a positive connector, wherein the negative connector and the positive connector both comprise plastic bodies, screw caps in threaded connection with the plastic bodies, cable lock catches arranged inside the screw caps, the cable lock catches are sleeved on the upper portions of gaskets, and the lower portions of the gaskets are arranged in the plastic bodies; the metal contact pin is arranged in the plastic body, and the retaining ring is arranged on the metal contact pin; a sealing ring is arranged at the joint of the positive connector and the negative connector; the stopping ring is of a barrel-shaped structure, and a plurality of tongue piece structures forming a certain angle with the cylindrical surface of the barrel-shaped body are uniformly arranged on the barrel-shaped body at intervals along the circumferential direction;

2. The improved connector for preventing metal pins from sliding and pulling out as claimed in claim 1, wherein the included angle between the tongue structure and the cylindrical surface of the barrel-shaped body is 10-30 °.

3. The improved connector for preventing metal pins from sliding and pulling out as claimed in claim 2, wherein the included angle between the tongue structure and the cylindrical surface of the barrel-shaped body is 10-20 °.

4. An improved connector for preventing metal pins from sliding out as claimed in claim 1 or 2, wherein there are at least 3 said tongue structures.

5. The improved connector for preventing metal pins from sliding off and pulling out as claimed in claim 4, wherein a reinforcing rib is provided at the connection part of the tongue piece structure and the barrel-shaped body.

6. The improved connector for preventing metal pins from slipping off and being pulled out as claimed in claim 4, wherein the retaining portion of the retaining ring is formed with a recessed structure, and correspondingly, at a corresponding position on the barrel-shaped body of the retaining ring, a protrusion is formed to fit with the recessed structure.

7. An improved connector for preventing metal pins from slipping out and pulling out as claimed in claim 4, wherein the outer diameter of the barrel-shaped body of said retaining ring is equal to the outer diameter of the pin body of the metal pin.

8. The improved connector for preventing metal pins from slipping out and pulling out as claimed in claim 4, wherein said retaining ring is fixedly attached to the metal pins by welding or punching process.