POGO PIN design and manufacturing process
How to choose a suitable POGO PIN
1. A good POGO PIN needs to meet the following three points:
①Reliable quality
②Stable performance
③Meet the requirements.
The timely delivery of orders is also very important. It is best to go to the POGO PIN connector manufacturer to investigate. The scale of the factory, successful solutions, processing equipment, production capacity, and R&D capacity, all directly affect product quality, delivery capacity, and technical support. Zhongzhengtian has advantages in the design scheme, mass production cost, and delivery capacity of goods in the industry. Welcome friends to come to the factory for communication.
POGO PIN follows three, three, and four principles
1.40% of the problems originate from a design
The design of the front end is unreasonable, and the rear end is useless (for example, the thimble nozzle is higher than the plastic plane, the PIN needle spacing is irregular, etc.).
2.30% of problems stem from communication
In the early stage, the communication of various technical requirements was not clear, and the actual use of the product was not clear, which was also one of the main reasons for frequent problems (for example RF thimble is used as the thimble of the charging box, the actual working height does not match the drawing, the center distance is not confirmed, etc.). Understand the customer's functional requirements and application scope, and can more reasonably recommend the specifications and parameters of Pogo pin;
3.30% of the problems originate from the process
The assembly of the product has multiple procedures, and the POGO PIN is irreversibly damaged due to improper operation in the manufacturing process (for example the nozzle is damaged, foreign objects in the pipe, SMT throwing, etc.).
Basic introduction of POGO PIN
Why does POGO PIN have a beveled structure: The bottom of the Plunger of the Pogo Pin is usually a beveled structure. The function of the beveled structure is to ensure that the Pogo Pin keeps the needle (Plunger) in contact with the inner wall of the needle (Tube) when it is working so that the current mainly passes through. Gold-plated needle (Plunger) and needle (Tube) to ensure the stability and low impedance of Pogo Pin.
Why does POGO PIN use a round head structure? Because Pogo Pin is usually relatively small, the elasticity required is not so strong. If it is used on a power bank or lighting, the elasticity is four or five hundred grams or even one or two kilograms. Naturally, it is better to make it flat. , The flat head has a large contact area, and its force is enough to break the oxide layer on the contact surface to make it fully contact. Most of the round heads are used on TWS Bluetooth headsets and smart bracelet watches. The maximum elastic force does not exceed 150 grams (the elastic force of the thimble of the charging box is between 20-35gf), and the elastic force of the contact between the surface and the surface will be dispersed, and the copper column at the headphone end will not be broken. The oxide layer is not enough, resulting in insufficient contact and poor contact. At this time, if a round head structure is used to make point-to-surface contact, the elastic force gathers on one point, and the contact will naturally be much more sufficient.
Performance parameter/performance parameter
key performance parameters
A. Working voltage: Less than 12 Volts DC
B. Rated current: 1.0 Amperes /Pin
C. Working temperature: -40°C to 85°C.
D. Storage temperature: 25℃+/-3℃.
E. Working environment humidity: 10%R.H. to 90% R.H.
F. Durability (life): 10,000 cycles.
G. Contact Impedance: 200 mOhm Max. @working stroke
(During working stroke: 200mOhm/Max)
Manufacturing process/制造工艺
Product assembly method
Electroplating process flow
What parameters need to be confirmed in front-end design
① Confirm the distance from the PCB board to the contact surface of the copper column on the earphone end (that is, the working height of the POGO PIN).
② Confirm the distance from the PCB board to the plastic surface of the charging box (that is, the maximum height of the POGO PIN needle tube, the needle tube must not exceed this height).
③ Confirm the distance between the center of the PIN needle and the center of the circle
(Confirm the size of the hat when taping later, to prevent interference during SMT patching).
④ Confirm the size of the PCB board and the space under the board
(Optimized and improved for POGO PIN).
PS: The diameter of the PCB board is recommended to be 1.6mm, and the thimble is recommended to be made into a through-board structure so that the effect is better and has the following advantages: ① The patch is firmer; ② The needle tube space is increased, the needle is pre-pressed more, and the contact is more sufficient.
Why should the bottom of the needle be beveled: If it is made flat, the current will be conducted by the spring, which has high requirements on the spring, and the spring is so thin that it is easy to burn out.