The type-C connector provides higher design flexibility for the engineering design of the new generation of electronic products. What are the attractive advantages of type-C connectors?

Speed open, two-way transmission

Speaking of the advantages of the new interface, the transmission speed "fast to open and close" is undoubtedly one of the most striking features. The USB Type-C interface solution provided by TE has the fastest data transmission rate up to 10 Gbps, while the data transmission rate of traditional USB 3.0 is only half of that. Imagine transmitting a 1.2G HD video through the USB Type-C interface. It takes only one second to complete the transmission, which becomes the real "second transmission".

USB Type-C interface can support up to 100W power in power transmission, which is 10 times as much as the traditional USB interface. Moreover, in transmission, the power of the old USB port can only be transmitted in one direction, and the power transmission of the USB C port is bidirectional, which means that it can have two transmission power modes. Therefore, users can not only use laptops to charge mobile devices, but also use other devices or mobile power supply to charge laptops.

Flexible and versatile, downward compatible

In addition, the USB C connector provided by TE has the advantages of flexibility and versatility, which can be called "omnipotent interface". This connector supports a variety of protocols. With the help of adapters, it can also be downward compatible with HDMI, VGA, DisplayPort and more interface types through a single USB C port. Whether it's power, data, audio or video, the same USB Type-C interface can be done. It can be said that "everything is safe with one hand".

It is believed that many consumers will be worried when they see the new USB Type-C debut: in the future, all the consumer electronic devices launched by various manufacturers will use the new USB Type-C, so I use the old USB interface mouse, U disk, mobile hard disk and other peripherals will not be used?

It doesn't matter. Manufacturers who use the USB C connector provided by TE don't have to worry about causing such problems to their customers, because USB Type-C can be flexibly downward compatible. Even if the devices in consumers'hands still use various previous USB interfaces, such as USB 2.0, USB 3.1 Gen 1 and USB 3.1 Gen 2, they can be used correctly on the new USB Type-C interface.

Of course, we will not forget the "anti-human design" of the old-fashioned USB "no plug-in is right". In the new type of USB Type-C interface, we have really realized "plug-in for both sides". It is not too much to call it a "double-sided swordsman" in the connector industry.

Anti electromagnetic interference, strong and durable

In addition, TE has provided the leading industry design for USB Type-C in some detail. For example, TE uses anti-electromagnetic interference (EMI) design behind the socket housing. This TE proprietary design can help eliminate redundant EMI leakage and provide better performance for users than traditional products of the same type.

Such details are also reflected in the fact that TE products are equipped with additional design to enhance the maintainability of connectors on board compared with other standard pin packaging products, which greatly increases the durability of products and makes electronic devices using its USB Type-C interface more resilient to harsh environments.

Compact shape and wide application

Finally, the fine shape also makes USB Type-C more adaptable to the trend of electronic products becoming thinner and thinner. Compared with the traditional USB interface, the 24-pin USB Type-C interface provided by TE can reach the size of 3 mm high and 8 mm wide, which is nearly half shorter in length and only one third to one half wider. As you can imagine, with USB Type-C, today's already thin "super-books" will almost certainly start a wave of "super-thin" war in the future.

These advantages make TE's USB Type-C interface dare to "go all over the world", whether in the most familiar consumer electronics field, or in the harsh environment of the home-owned industry and other fields, can be easily competent. At present, TE's USB Type-C interface can be widely used in factory automation, industrial machinery, data centers, medical devices, A/V digital switching, battery packs and chargers, automotive information entertainment, commercial equipment, lighting, tablet computers, personal computers and portable computers, wearable devices and smart phones.

The mobile phone data line is the function of intermediate transmission of information and picture. Generally speaking, each mobile phone will have a special corresponding mobile phone data line, but with the universality of mobile phones, the data line also has a universal function.

In our daily applications, many consumers generally find that mobile phone data lines often have some problems:

(1) What should we do if the cell phone can't dial after using the data line? If the cell phone can't dial correctly, we should first check whether the setting parameters of the cell phone are correct, such as checking whether the network settings are selected correctly, and if the cell phone can't dial correctly under the current network settings, we can try another network. Then check whether the current location is within the scope of mobile network operation. If you are not in the area covered by the network, of course, you can not dial correctly. In addition, check the details of other aspects carefully, such as whether the mobile phone has set restrictions on calls, whether the call fee has reached the upper limit, and whether the SIM card has been inserted correctly. If the phone is still not dialed correctly after checking, and then check whether the keys of the mobile phone are in good condition, it is really impossible to send the phone. Professional maintenance station to allow professionals to repair.

(2) What protective measures should we take if the mobile phone should be wet by water? In the daily use of the mobile phone, the phenomenon that the mobile phone is wet by water is still very common, such as when washing hands, accidentally splashing the water on the mobile phone, or when using the mobile phone in rainy days, not paying attention to the protection to wet the mobile phone by rainwater. Once this phenomenon occurs, we must give first aid quickly, because the inside of the mobile phone is made up of some circuit boards. If water penetrates into the mobile phone panel, it may corrode the circuit or battery, resulting in the mobile phone can not work properly, or even damage the mobile phone. For this reason, we should first remove the battery and never turn on the power of the mobile phone. After removing the battery, it should be sent to the repair professionals immediately for disassembly and water treatment, so as to avoid the corrosion of the circuit board, which can not be repaired.


(3) What's the problem that mobile phones can't connect to transmit data? I wonder if you have ever encountered the phenomenon that mobile phones can't be answered in the process of using mobile phones. There are many reasons why cell phones can't be answered. We should conduct a careful examination of this phenomenon. First of all, we should check whether the antenna is fully extended, because in some areas the reception effect is not very good, we must use the antenna to receive normally; then we should check the signal intensity meter signal on the display screen, if the signal is weak, move to the open position, if in the building, move to the near window. . If the above measures still can not guarantee the normal answering of the mobile phone, we should check whether the mobile phone has set the call transfer and call ban, or set the shutdown ringing and vibration call, if it is only reset, it can be answered

Yachuang Electronics Co., Ltd. is a company specializing in the development, design, manufacture and sale of USB 2.0 data lines, USB 3.0 data lines, Type C data lines, network lines, data lines and other connection lines. It has a complete and scientific quality management system, which has passed the certification of ISO9001 international quality management system; National Consulting Hotline: 86-755-88 210101-3, http://www.achlink.com.cn/

The successful development of Type-C interface technology can be said to be a major breakthrough in the field of electronics, USB Type-C interface from the birth to today's hot degree. There are many types of smartphones and notebook computers that use USB Type-C interfaces for data transmission and charging connections. Nowadays, with the exhaustion of energy on the earth, new energy electronic products usher in the spring, such as new energy vehicles are widely used. At present, USB Type-C interface is still less used in car-mounted charging electronic products, usually set up as a backup interface.

Why is the demand for vehicle electronics so high that it has not been designed with the USB Type-C interface standard? Even though many smartphones are designed and manufactured with Type-C interfaces, they are still not fully popular in so many electronic products, and USB Type-C interfaces have not yet reached a unified interface standard. This also limits the application of USB Type-C interface in vehicle electronic products to a certain extent, so many vehicle electronic charging products still use USB-A to USB Type-C data line interface standard design to apply.

Why do we need to design and support the USB Type-C interface standard for vehicle charging products? Today's USB Type-C interface connector adapters have become a standard trend in interface design, and the use of USB Type-C interface in vehicle electronics has the following three advantages:

1. Because the USB Type-C base is much smaller than the current USB-A base, we can make the size of the car electronic products very small. By measuring and calculating, the size of USB Type-C base is less than a quarter of the size of conventional USB-A base, in the case of the same power product design, the use of USB Type-C output interface to design vehicle charging products will be more delicate and compact in appearance.

2. With the same volume of electronic products, the on-board charging products designed with USB Type-C interface will save more internal space, facilitate the arrangement and connection of internal circuits and electronic components, thereby improving the output power of on-board electronic charging products, and realize the pressure-free USB PD devices such as mobile phones and notebook computers. Charging and data transmission.

3. Nowadays, the electronic products of USB Type-C interface connectors are becoming popular, but the market of on-board electronic products of USB Type-C interface is still in a blank stage, so the market prospect of on-board charging products of USB Type-C interface connectors is very promising. Nowadays, the rise of new energy vehicles and on-board electronic products are very promising. Products also need USB Type-C interface to realize their potential application advantages.

With the popularity and popularity of mobile phones, data lines have become an essential part of people's lives. But no one can use a data line forever, so there will be a case of buying a data line, but for these constellations in the twelve constellations, buying a data line is really a big problem, you can buy crazy.

ARIES: dazzling

Aries rarely pays attention to electronic products, especially this kind of minor products. So they are not familiar with all kinds of functions and data, they are not easy to buy one can rest assured of people, so in a lot of data lines to pick out, dazzled, their temper is so big, in the end, will definitely be driven to madness.

VIRGO: it's hard to please.

Virgo is not only buying data lines, but also buying things. No matter how well people say it, a thing is by no means perfect in their eyes. If this thing is not perfect, it will not satisfy him completely. The same is true for data lines. So when they buy data lines, they will definitely get crazy.

LIBRA: difficult to choose

When Libra buys data lines, the biggest reason to get mad is that there are so many different kinds of data lines that you don't know which one to choose. This would make them wonder whether it's best to have the same data line for all phones of the same type, so they don't have to choose. Is it white or black? Is it fast charging or normal charging? Is it original or casual?

Aquarius; personality

When Aquarius buys data lines, it's also easy to get caught up in a frantic situation. This is largely because they attach great importance to the display of personality, that is, do not want to use the same style with others, so always pick and choose, can not decide. They want their data lines to be unique, preferably with their names engraved, so that they have the most personality.

Yachuang Electronics Co., Ltd. is a professional development, design, manufacture and sales of USB 2.0 data line, USB 3.0 data line, Type C data line, network line, data line and other connection lines of the company, has a complete and scientific quality management system, through the ISO9001 international quality management system certification; National Consulting Hotline: 86-755-88 210101-3,

Usually we use the mobile phone data line to charge, can also be used to transfer data files and so on. Pictures, music, videos and other files can be transmitted between the phone and the computer, but some mobile data lines can't transmit data. Why can mobile data lines transmit data, and others can not transmit data?

Mobile phone data lines can transmit data, because there are four cores in the data line, two for charging, two for transmitting data. General green and white two wire cores represent data lines, which are data lines consisting of D+ and D-. Some USB cables do not have these two, that is, the charging line, the difference is to use the computer and mobile phone link together, see whether there is a computer driver installation, or the phone prompted USB data storage. This proves to be a mobile phone data line, there is another way to distinguish is to cut the line to see, generally charged wire core than the data line core more, transmission data line diameter is relatively thin, so check which core number is less, that is the data line.

General data lines can transmit data, and there are many reasons why data can not be transmitted. For example, if you use a charging line instead of a data line, or if the plug of the data line is out of contact, or if you use a bad data line, it is possible that the core inside is too thin and too small to break. If you can't transmit data, you can find a normal data line and compare it with two. If a connection between the phone and the computer is in any case that means the data line is okay, if the connection to the computer does not respond, that is the data line is out of order, that is bad, the best solution is to buy a new data line bar.

Yachuang Electronics Co., Ltd. is a professional development, design, manufacture and sales of USB 2.0 data line, USB 3.0 data line, Type C data line, network line, data line and other connection lines of the company, has a complete and scientific quality management system, through the ISO9001 international quality management system certification; National Consulting Hotline: 86-755-88 210101-3, http://www.achlink.com.cn/

The data line we use is from the factory. In general, data line manufacturers are mainly customized data line, most factories do not have too much spot storage, this is mainly related to factory operations. Customers need to customize, there is a need for spot, which needs to be purchased in the data line factory wholesale, then the data line manufacturers of mobile phone data line wholesale price is how much, data line quotation and provide that information?




Customers looking for data line factory purchasing data line, must first determine whether it is a factory, the most effective way is whether to see the factory, if the data line factory is basically can see the factory. After determining the factory, consult and communicate with the customer service, sales person or person in charge of the factory. For example, customized data lines, customers in the proposed customized data line requirements, is not aware of the mobile phone data line customized wholesale price, we have to consult the data line quotation. What are the quotations for customized data lines? I want to know that the quoted price of customized data line is required to provide the following information.

1. Data line samples or engineering drawings, this is mainly to confirm with the data line manufacturers can do.
2. The quantity of customized data lines is one of the keys to decide the quotation. Generally, factories have layers and prices. The larger the quantity, the more favorable the price will be.
3. Detailed specifications of customized data line. The main specifications of this data line are product type (Apple/Android/type-c), length, color, outer cover material (forming/braiding/metal), shell (forming/alloy/ABS shell), core material (copper wire/tin-plated copper), OD size, number of cores, current size, several cores and so on. And so on, these are also the key factors of data line quotation.
4. Determine whether it is customized or off-the-shelf. If the customer's data line factory has not done it before, it is necessary for the factory to open the mold for the new product, because no mold has been done before can not provide production processing. If the data line manufacturer just has the customer demand sample, is the mold has done the product, you can proofing, not spot to confirm the sample after the order production, confirmed the sample and spot can be directly ordered shipment.
5. Whether or not the packaging is needed, many customers need the factory to provide the packaging in order to customize or purchase to sell directly.

Customers, whether they are customized data lines or purchasing wholesaler data lines, provide this information after the factory according to the type of data lines, specifications, material costs, labor costs and so on to calculate the specific product prices. So the wholesale price and the specific quotation of the data line manufacturer's mobile phone data line come from this. Specifically, if you need to customize the purchasing data line, and can not find a good supplier of the data line factory, then choose our Yachuang Electronics Limited Factory, strict and standardized production management, mainly high-end data line products, Standard Test and inspection, reliable quality, safety and environmental protection, complete after-sales service guarantee It's worth your trust.

Yachuang Electronics Co., Ltd. is a professional development, design, manufacture and sales of USB 2.0 data line, USB 3.0 data line, Type C data line, network line, data line and other connection lines of the company, has a complete and scientific quality management system, through the ISO9001 international quality management system certification; National Consulting Hotline: 86-755-88 210101-3, http://www.achlink.com.cn/

Imagine what would happen if there were no connectors. In this case, the circuit must be permanently connected with a continuous conductor, for example, the electronic device to connect to the power supply, the two ends of the connecting wire, and the electronic device and power through a certain method (e.g. welding) fixed connection. In this way, both production and use have brought a lot of inconvenience. Take automobile batteries as an example. Assuming that the battery cables are fixed and welded to the battery, the car manufacturer increases the workload, production time and cost of installing the battery. Battery damage needs to be replaced, but also to send the car to the maintenance station, dismantle the old welding, and then weld a new, to pay more labor costs. With a connector, you can get rid of a lot of trouble. Buy a new battery from the store, disconnect the connector, remove the old battery, install the new battery, and reconnect the connector. This simple example illustrates the benefits of connectors. It makes the design and production process more convenient and flexible, and reduces the cost of production and maintenance.


Shenzhen Yachuang Electronics is a professional development, design, manufacture and sales of USB 2.0 data line, USB 3.0 data line, Type C data line, network line, data line and other connecting lines company, has a complete and scientific quality management system, through the ISO9001 international quality management system certification; National Consulting Hotline: 86-755-88210 101-3, you can also click on the online enquiry details:

Needle arranging connector is a kind of precise and fine electronic component, its contact pin is usually very fine, so not only in production need to pay attention to a lot of operational details, but also the production of needle arranging connector in packaging is exquisite, no one wants to see the production of needle arranging connector because of packaging. Improper use of pin connector products will result in adverse effects. Needle row connector according to the production of different materials of raw materials, or according to the special requirements of customers, will use different ways to pack the needle row connector shipment. Nowadays, there are four most common packing methods for needle arranging connectors: bag packing, box packing, pipe packing and tape packing.

Pin connector

1. Pin position small straight insert row needle, or 90 degrees row needle, contact pin shorter row needle connector will generally choose the bag packing method.

Bag packing method for pin connector

2. For small pin position 180 degrees, or pin hole pin position pin arrangement connector usually choose to use box packaging.

Box packaging method for pin connector

3. In order to protect the smooth and intact surface of the pin-length sticker, the tube packing method must be used.

Pipe packing method for pin connector

4. The use of tape-wrapping for needle-arranging connectors is usually based on the special requirements of customers. The advantages of this kind of packaging are machine mounting, high efficiency, high yield, good protection measures for needle-arranging connectors, but the production cost will be much higher.

Connector is like the function interface of the program, the design is reasonable, the future product maintenance, upgrade, transplant will be twice the result with half the effort, so that the product maintains lasting vitality; unreasonable design, resulting in future maintenance, upgrade difficulties, pull the whole body, and ultimately make the product lose competitiveness, the importance of the connector goes without saying And metaphorical.


Connector, also known as the engineer's plug-in, is used to connect two circuit boards or electronic devices to achieve power or signal transmission. Through the connector, the circuit can be modularized, the assembly process of electronic products can be simplified, and the products can be easily maintained and upgraded.


There are many kinds of connectors, such as communication interface terminals, wiring terminals, line-to-board connectors, board-to-board connectors and so on. Each category can be subdivided into several classes, such as:


The board to board connector includes pin header, female header, PC104, plate to plate connector, etc.
Pin connector connector

The wire to plate connector includes FPC connector, IDC socket, simple ox horn seat, etc.


For modular circuits, connector selection plays a decisive role, so when choosing connectors, what should we consider suitable for hardware connectors?


1, pin, spacing


Pin number and pin spacing are the basic basis for connector selection. The number of pins you choose depends on the number of signals you need to connect. For some patch connectors, such as the patch pin, the number of pins should not be excessive. Because in the process of SMT welding, due to the high temperature effect, the plastic connector will be heated deformation, the middle bulge, resulting in virtual welding pins. Our P800 Flash programmer used this row of needles and row bushes as inter-board connections in the early years of research and development. As a result, the lead pins of the row needles of the prototype were welded in large areas. After replacing the pin with half the number of 2 pins, there is no virtual welding.


Nowadays, electronic equipment is developing towards miniaturization and precision. The lead spacing of connectors is from 2.54 mm to 1.27 mm and then to 0.5 mm. The smaller the pin spacing, the higher the production process requirements. Lead spacing should be determined according to the company's production technology level, blind pursuit of small spacing, will cause difficulties in production and maintenance.


2, electrical properties


The electrical properties of the connector mainly include: limiting current, contact resistance, insulation resistance and resistance strength. When connecting high-power power supply, pay attention to the limit current of connector; when transmitting high-frequency signals such as LVDS, PCIe and other signals, pay attention to contact resistance. Connectors should have low and constant contact resistance, usually from tens m to hundreds of M ohms.


3. Environmental performance


The connector's environmental performance mainly includes temperature resistance, moisture resistance, salt fog resistance, vibration, impact and so on. Choose according to the specific application environment. If the application environment is relatively humid, the requirements for wet and salt spray resistance of connectors are high, to avoid the metal contact of connectors to be rusted. In the field of industrial control, the anti-vibration and impact performance of the connector is required to avoid the connector falling off during the vibration process.


4. Mechanical properties


Mechanical properties of connectors include plug and force, mechanical, etc.  Mechanical stall is very important to connectors. Once inserted, it is likely to cause irreversible damage to the circuit.


The insertion force is divided into insertion force and separation force. The maximum insertion force and the minimum separation force are stipulated in the relevant standards. From the point of view of use, the insertion force should be small and the separation force should be large. Too little separation force will reduce the reliability of contact. However, for connectors which often need to be plugged and pulled, too much separation force will increase the difficulty of pulling out and reduce the mechanical life.


P800 Flash programmer used the horn connector as the connector between the programmer and adapter board in the early development process. This connector has tight contact and low cost. The drawback is that mechanical isolation is not obvious and the separation force is too large. In the process of replacing the adapter board of the programmer, the couple of connectors can be separated by means of tools such as tweezers, which affects the user experience.


In order to solve the problem of excessive separating force of connector, we designed a complicated auxiliary puller, which increased the cost, but the pull-out effect was not obvious.


After that, we designed a sheet metal cover plate, fixed the adapter plate to the cover plate, and realized the purpose of separating the connector by pulling the cover plate. The actual test result is not ideal, even the phenomenon of connector plastic cracking and pin skew appears.


In order to reduce the splitting force of the board-to-board connector and facilitate the user to plug in and pull out the adapter board, we made a lot of attempts, and finally found a light on the road of exploration. Finally, we chose the connector shown in the following figure, and modified the PCB and the product shell structure.


The actual test shows that the connector has a unique orientation, obvious anti-staleness effect, small insertion force, moderate separation force, good insertion and pull-out feel, greatly improving the convenience of the use of plug-in and pull-out parts.

FPC connector is one of many connectors, which is often used on the PCB board of electronic products. While on different PCB boards, FPC connector should choose the FPC connector of the corresponding size according to the requirements of the corresponding electronic products and equipment. Generally speaking, the size of FPC connectors and the available space of electronic devices are important considerations, because generally the smaller the size of FPC connector products, the smaller the contact spacing of FPC connectors, and the higher the density of contact parts. This tight FPC connector contact design generally means less insulation and less force, so when you choose or use FPC connectors, the following five FPC connector product knowledge you should know;
1. When choosing FPC connectors, the first thing to consider is whether the selected FPC connectors can meet the voltage and current requirements of electronic products PCB board, according to the understanding of electronic engineers connector products for low-level circuits or power circuits. Because the FPC connector can not be operated without current, so in the case of low current and low voltage, because it can not penetrate the oxide layer, it is necessary to choose the contact coating is not easy to oxidize the FPC connector.

2. General enterprises in the production of electronic products need to purchase FPC connectors, are advised to choose high-temperature FPC connectors, because electronic products in operation will produce operating temperature, if the production of electronic products in the selection of high-temperature FPC connectors, you can reduce the high-temperature state of bad. Effect. If the use of some ordinary high-temperature FPC connectors will not be able to bear when the working temperature is too high, it may cause burning connectors or electronic PCB board, affecting the use of electronic products.

3. If the production of electronic equipment products using FPC connectors when the number of insertion and separation is very small, can consider the use of low-cost ordinary contact parts of FPC connectors. Because the contact pressure in FPC connector is an important indicator, if the larger contact pressure means greater insertion force and pull-out force, it is a direct impact on the size of contact resistance and contact wear.
Fourthly, when using FPC connector, do not frequently plug and unplug FPC connector which has been fixed on the PCB board, because if the connector terminals and other components of FPC connector are subject to certain wear, when the wear reaches a certain wear-resistant value, it will lead to the mechanical life of FPC connector reduced, thus shadowing. Ring FPC connector life.
5. Do not insert the FPC connector tilted when using the electronic equipment, because this may cause the pin connection of the FPC connector is not fully in place with the electronic equipment, and other connections or lines on the electronic equipment should not be arbitrarily unplugged or unplugged phenomenon, whether or not it may lead to the FPC connector in use to build. Some data abnormity or connection loss.

Connector wear has a significant impact on the performance of the connector because the wear process eliminates the surface layer of the connection that provides corrosion protection for the contact material. The most commonly used contact material is copper alloys, all of which are vulnerable to corrosion in typical connector working environments.

There are two main reasons for connector wear. The most obvious one is that when the contact surfaces of the plug and socket slide against each other, wear and tear occur during each occlusal process. The second is the wear caused by fretting during the use of connectors. Fretting is a small-scale motion caused by mechanical disturbance or thermal expansion mismatch, ranging from several microns to tens of microns.


First, the wear mechanism can be very complex, so this article is limited to a few simple observations of the wear process of the connector. Wear can be described by a simple equation, although the meaning of the parameters in the equation may be quite complex. The formula is as follows:


V = k F L/H


V is the wear volume (the volume of metal removed from the interface in a single wear body), K is the wear coefficient, F is the applied load (the normal contact force of the connector), L is the displacement length of the wear body, and H is the hardness of the contact metal.


The explanation for F, L and H is relatively simple. The contact force F is the connector design parameter. The length of the worn body is the length of the engagement or the length of the fretting displacement. Contact length is the design parameter of connector, but the length of fretting displacement is related to many parameters. In the equation, H is the hardness that contacts the metal. For such materials, the hardness is determined. For two different metals, it is composite hardness. In a connector, the two contact surfaces generally have the same finish, such as gold, but the thickness of the nickel substrate and the hardness of the contact material may be different, so the composite hardness is appropriate. However, for a given connector, F, L and H can be considered "known".


Wear volume V needs some explanation. The parameter of the connector wear is the loss of the surface thickness of each worn body. V=at, where A is the area of the contact interface, and t is the thickness of the material being removed. A depends on geometric design. Wear is due to needle contact with a surface, not a centimeter diameter ball bearing; it is important for geometric design. Similarly, for a given connector, this association can also be considered "known".


But K is a variable factor of many parameters. The most important parameters are contact force F, hardness H, contact geometry, surface roughness and lubrication state of the contact surface. Again, F, H, contact geometry design, and surface roughness are "known" for a given connector. The lubrication state depends on the environment of the connector. In my opinion, in fact, contact force is the most important parameter in the K of connectors, for the following reasons.

As shown in Fig. 1, two contact surfaces are shown. It should be noted that all surfaces are rough at the micro scale of the contact interface. For simplicity, two contact points or bump points are given. In the following discussion, assume that the first contact point creates an interface (a in Figure 1) and that the interface (b) starts to work as the load increases and the surface becomes tighter.

Under these conditions, the interface (a) experiences more deformation than the interface (b). Because the uneven contact is very small, the deformation will be plastic, and the uneven radial flow will occur with the uneven top smoothing each other. This radial flow destroys the surface film and surface contaminants, and helps to create the required metal contact interface. The metal interface created will experience a certain degree of "cold welding". Simply put, "cold welding" means that metal surfaces are interconnected through rough interfaces, just as metal bonds are formed inside the metal. The uneven metal is also hardened due to uneven deformation. The same process occurs when creating an interface (b), but to a lesser degree. This means that the interface (a) will be stronger than the interface (b), because larger deformation creates greater contact area for "cold welding" and it also undergoes greater hardening.


Taking into account these interface features, what happens when shear stress is applied to the system. Since (a) is a strong interface, the applied stress must be sufficient to destroy the interface at (a), and the weaker interface at (b) then appears. From the point of view of wear, interfacial fracture is the key. Consider the state of the interface (a). After "cold welding" and hardening. In fact, due to interfacial hardening, (a) may have higher cohesion than the original metal itself, uneven separation may occur within the original metal, as shown in Figure 1, rather than directly at the interface. The resulting wear particles are the wear volume V in the equation. At B, the weaker interface may break near or near the original interface, and wear rarely occurs. The wear process at (a) is usually referred to as adhesive wear, and the wear process at (b) is called polishing wear. If the wear trajectory produced during the occlusion of the connector is observed under a magnifying glass, the adhesive wear trajectory will show signs of wear particles at 30-50 magnification, and appear a little rough, while the polishing wear trajectory will appear smooth and bright. If the abrasive particles produced in the adhesive wear process are deformed enough to harden, they act as abrasive on the contact interface, i.e. the so-called three-body abrasive wear, and an additional wear occurs.


Back to k, it is obvious that the change of wear mechanism from polishing to adhesive wear will be reflected in the significant increase of wear coefficient K. In the process of polishing wear, K increases with the increase of contact force. However, when the contact force increases to the extent that the adhesive wear becomes active, K increases significantly discontinuously and potentially. The discontinuous change of K will mainly depend on the lubrication state of the connector. For clean surfaces, the transition range will be several to dozens of grams, while for well-lubricated surfaces, the transition may not occur until the contact force increases to hundreds of grams.

Consider connector performance comprehensively. In applications where low contact forces are acceptable/required, such as low current, high pin number, low bite force and high durability applications, the expected wear mechanism is polishing wear, and the wear rate will be very low. In general, power applications require higher contact forces to meet higher requirements for contact interfaces in terms of resistance and stability. In this case, the adhesive and abrasive wear mechanisms may be more active. This is one of the reasons why many power connections are designed to take advantage of multiple contact beams. These systems reduce connector resistance because multiple beams are electrically parallel, and they can also be designed to have lower contact forces to reduce the likelihood of adhesive and abrasive wear.


Of course, in the design and manufacture of connector system, the wear problem needs the best solution. Because the wear rate is inversely proportional to the hardness, the wear rate of the tin connector will be higher than that of the gold connector. This relationship also explains why the so-called hard gold is usually used. Another design parameter that affects the wear of gold finished connector is nickel plate. The degree of finish affects the number of wear that the connector can withstand without wear. In this regard, thin gold or Flash gold should be considered. If the wear performance of the connector system is found to be inadequate, the contact lubricant can fully improve the performance to meet the application requirements. The wear and tear problem should be fully considered in the design of the connector, otherwise the performance of the connector will be fatal.

As a 13-year-old professional data line manufacturer, we have a thorough understanding of the new USB TYPE C interface in the constantly updated market.
1. transmission speed: maximum data transmission speed to 10Gbit/ seconds, USB 3.1 is also the standard.
2. Positive and Reverse Interpolation: Supports the "Positive and Reverse Interpolation" function which can be inserted from both sides, and can withstand 10,000 times of repeated insertion.
3. Standard Type C data lines equipped with Type C connectors can operate over 3A current and also support "USB PD" with USB power supply capability, providing up to 100W of power.

4. support three segment voltage output: 5V, 12V, 20V.

5. Fast charging: Through USB Power Delivery technology, the data line part supports 3A, the interface supports 5A current, can be used for digital products fast charging.
6. ultra thin: Port length 0.83 cm, 0.26 cm wide. The old USB port is 1.4 centimeters long and 0.65 centimeters wide. This also means that the end of the Type C data line will be 1/3 of the standard USB-A data line plug size.
7. Two-way power transfer: the old USB port, power can only be one-way transmission, USB-C port power transfer is two-way, which means it can have two power transmission mode. Therefore, users can not only use the laptop to charge mobile devices, but also other devices or mobile power supply to charge the laptop.
Yachuang Electronics Co., Ltd. is a USB3.0 data line manufacturer, Android data line factory, the main mobile phone fast charging data line, luminous data line, USB3.0 data line, can be customized creative data line, Type C data line ODM, has a complete and scientific quality management system, through the ISO9001 international quality management system certification; National Consulting Hotline: 86-755-88 210101-3