Since the products that need to use the connector are developed in the direction of appearance refinement, installation simplicity and long service life, the existence of the pin probe connector has well solved the needs of the connector manufacturer, the pin probe connector. Therefore, it has become the favor of many connector manufacturers. After a large number of related tests, the factors affecting the life of the pin probe connection are as follows.

1. Frictional corrosion

The friction of the pin probe connector during operation and the corrosion of various corrosive substances in the working environment are important factors for greatly reducing the life of the pin probe connector.

2. Electrical accident

This type of fault generally refers to the connection between the wire and the terminal and is a factor that directly affects the life of the pin probe connector. In order to solve this problem effectively, a new type of reinforced crimping technology has emerged, which is an upgraded version of the previous crimping technology. After testing, this technology can greatly reduce the occurrence of electrical faults, and has gradually begun to be applied in actual production.

3. Plugging problem

The problem of plugging and unplugging the pin probe connector has always been an important factor in the failure. The control of the insertion force is difficult, and it is easy to fall off when it is small, and it will be damaged when it is large. This has always been a big problem in this respect, so many designers can’t think of any good way. The more methods used now are to control different insertion and extraction forces depending on the place of use. Although the application of a part of the pin probe connector can be guaranteed to some extent, this problem cannot be completely solved.

Currently, the board-to-board connector used on mobile phones has the following characteristics:

First, “soft”, flexible connection, and has a strong corrosion resistance; secondly, no welding is required, installation is convenient, and there is no fire hazard, which also saves space.

In order to improve the combined force of the socket and the plug, a simple locking mechanism is adopted in the fixed metal part and the contact part, which not only improves the combined force, but also makes the locking more realistic. The connector minimizes the thickness of the product to achieve the purpose of connection, which has more and more ultra-thin mobile phones on the market.

The pitch of the pins is also narrower and narrower. At present, the main focus is 0.4mm pitch. The 0.35mm pitch should be the industry’s narrowest pitch-to-board connector. The 0.35mm pitch is currently used mainly for Apple mobile phones and domestic high-end machines. Type, its application will be the trend of the past two years, it has the advantages of the smallest volume, the highest precision, high performance.

Today, consumers are demanding more and more demand for product thickness and feel. Ultra-thin, ultra-narrow connectors put new demands on the electroplating process. On products with a height of 0.6mm and a single product of less than 0.4mm. How to ensure the gold plating thickness of the product and the tin effect does not climb the tin, which becomes the most critical problem of the miniaturization of the connector. At present, the common practice in the industry is to remove the gold plating layer by laser to block the upper tin path.

The waterproof rf coaxial connector is usually working in the water.and they are waterproof.The power cable and net cable can be put in their internal.They can not only provide normal and reliable power,single transmission,but also can be waterproof ans dust-proof.

At present.The standard for waterproof is according to IP waterproof grade standard.You can see the number XX after IPXX to estimate the waterproof performance, The first number X is from zero to six.the maximum is 6,The second number is from zero to eight,so the maximum waterproofing grade is IP68.

With the development of technology,We use many application in our daily life.And the thing with electric are not very good at our safety.so It’s very important if the the application is waterproof.The waterproof connector has excellent sealing performance,reliable waterproof performance,For example,some device need to be fixed in the water or at the button of the water,Then if we use waterproof rf coaxial connectors,we don’t need to worry about the water especially the water contains many chemical substances destroy the devices.

The appearance of waterproof connector can be said to be a great blessing for us,It is widely used,We use waterproof rf coaxial connectors in many areas.Like in an industrial environment,LED lighting, urban outdoor lighting project, lighthouse, cruise ship, aviation, industrial equipment, cable, sprinkler and so on.which are all use waterproof connectors.Military field due to the application of strict requirements,Many waterproof connector are used, such as submarine connector, submarine-launched missile connector and so on.

For a simple reason : the products are getting smaller. Nowadays, countless electronic devices, such as smartphones, tablets, blood sugar detectors, require stricter sizes and tighter internals, leaving less room for connectors. This trend is also found in the field of national defense and aerospace, such as satellites, guided missiles and Avionics systems, where the compactness requirements can only be met by “miniature” connectors.

As the demand for smaller connectors continues to rise, design engineers face a new set of challenges. They can no longer put the design of the connector into the final stage of the project. Micro connectors need to be farsighted. It requires designers to anticipate various factors such as packaging, durability, current load capability, and interchangeability.

Designers should consider the ease of replacement, especially in closed shells. Below are some design recommendations from micro connector vendors. Consider the connector early in the design, understand the limitations of the space, understand the current load capacity, consider the stability of the small/micro connection, consider the easy replacement, understand the functional requirements of the connector, and consider the mechanical stress.

Sheath refers to the connector made by injection molding and stamping of engineering plastics, PVC materials or metal materials,To protect the connection point and connect all kinds of electrical appliances,Support and protect terminals for firm contact,Accurate positioning, dust, pollution, moisture, insulation and other protection.Commonly used sheath materials mainly include PA6, PA66, ABS, PBT,PP, PVC and so on,Different materials can be selected according to different requirements when designing plug-ins,Also may according to the actual situation in the plastic to add flame retardant or reinforced materials, in order to achieve the purpose of strengthening or flame retardant, such as adding glass fiber reinforcement.

Terminals play an important role in connecting wires and devices, transmitting current and electrical signals,The materials and performance of the commonly used terminals are referred to below,Brass (copper-zinc alloy) has the characteristics of low cost, good elasticity and good forming quality.But it is easy to crack under stress and corrosion.Phosphorus bronze (copper tin alloy) has good elasticity,Stronger, but lower conductivity than brass, higher price,Beryllium copper (copper-coated alloy) has excellent conductivity, strength, elasticity, corrosion resistance and abrasion resistance.The price and hardness are very high.Refer to QC/T417 standards for vehicle harness connectors for material code and performance.Terminals commonly used coating tin, tin lead alloy, silver, gold.The terminals of tin and tin lead alloy have corrosion resistance and good weld ability,Gold-plated terminals have excellent corrosion resistance and electrical conductivity,Nickel-plated terminals also have excellent corrosion resistance,Electroplating is to improve electrical conductivity, corrosion resistance and wear resistance, weld ability,The terminals such as air bag and wheel speed should be gold-plated, and the hole joint should be equipped with fixed hook to prevent rotation.

What is the advantage and disadvantages if nickle plating?And how about the gold plating?When post the pcb mount.Why the nickle plated is more convenient to solder the tin?There are many false solder in the nickle plating,But few in the gold plating,That’s why?

Answer 1: We know only the weld ability and conductivity of gold, its stability is the best among metals,It is widely used in PCB board.Nickel, good stability, but poor weld ability,But the temperature is better,It is rare to hear of nickel plating on the gold fingers of PCB boards,

Answer 2:Connector plating a single coating is very few, generally after nickel plating and then a layer of gold. Gold electroplates better conductivity and weld ability than nickel, but costs more. The cost of nickel is low, used in the ground coating on the substrate play a filling role, and subsequent coating capacity.

Answer 3: the electroplating physical properties are relatively stable, electrical conductivity is better, but the material is more expensive, general electroplating in the contact layer of the terminal.

Answer 4: the nickel itself electroplating is not good, generally will not be directly plated nickel for welding, is now the so-called solderable nickel, but it is a layer of flux after nickel plating.

The structure of waterproof connector is generally divided into metal contact conductor and shell metal.

The different between Metal and plastic (nylon TA66) shell :

Mechanical life: The mechanical life of waterproof connector refers to the number of times of plug and pull, and the industry standard is usually 500 to 1000 times.The contact resistance, insulation resistance and withstand voltage of the waterproof connector should not exceed the specified standard value when the mechanical life of the waterproof connector is reached. There is little difference between the metal waterproof connector and the plastic connector.

Behaviour of electricity: Rated voltage, rated current, contact impedance, insulation resistance, etc., according to the required standard value, this metal is the same as the plastic shell.

Enviromental parameter : The main environmental parameters are ambient temperature, humidity, rapid temperature change, atmospheric pressure and corrosion environment. In the use and storage of waterproof connectors, the environment in the process of transportation has a significant impact on its performance, so it is necessary to choose the corresponding metal shell according to the actual environmental conditions will be better than plastic.

Termination Method: Termination method refers to the connection between the hardware contact and the wire and cable of the waterproof connector male and female connector. The metal as same as plastic shell, it is divided into solder, crimp, clamp, pierce and screw.

Comprehensive analysis shows that there is little difference between metal and nylon TA66 plastic shell except for shielding function of connector. The cost of plastic is lower than that of metal shell, and the structure is more reasonable.

When the connector is connected, the pin will be expanded with a certain force, but it is easier to separate. Therefore, it is judged that the coupling force of the electronic connector is larger than the separation force.

Therefore, the interaction between the two forces is easy to cause the connector to wear out. If you want to reduce wear and tear, look at the following good ways: Improve the strength of the gold plating layer on the contact surface which can effectively reduce friction; the contact surface can be nickel plated and then gold plated, which is a little less frictional than gold plated directly on copper.

The thicker the nickel layer, the stronger the wear resistance of the gold plating layer.

The smoother the surface of the connector is, that is, the lower the roughness, so the friction is very small.

In the daily use of connectors, we should pay attention to the maintenance of electronic connectors to reduce human damage.