Patent Application
20210143573
The present invention relates to a plug, and more particularly to a plug that may improve the waterproof effects of the plug.
A conventional plug has a seat, a circuit board, two pins, and a terminal connector. The seat is hollow. The circuit board is disposed in the seat. The two pins are mounted on an end of the seat and are electrically connected to the circuit board. The terminal connector is mounted on another end of the seat, is electrically connected to the circuit board, and has a cover and two terminals. The cover is mounted on the seat. The two terminals are mounted on the cover at a spaced interval and are electrically connected to the circuit board. Each one of the two terminals has a tube portion and a connecting portion. The tube portion has a chamber, a first opening, and a second opening. The chamber of the tube portion is axially formed through the tube portion. The first opening and the second opening are respectively formed in two ends of the tube portion and both communicate with the chamber of the tube portion. The second opening is closed by the cover. The connecting portion is formed on the tube portion adjacent to the second opening, is inserted into the seat, and is electrically connected to the circuit board.
The second opening of each one of the two terminals is closed by the overmolding of the cover. Materials of the cover and the two terminals are different. The cover and the two terminals are assembled together by the overmolding means. The cover cannot completely abut an inner surface of the tube portion, thereby the second opening of each one of the two terminals is not completely sealed. Water vapor easily enters the seat via the terminal connector, such that the waterproof effect of t the conventional plug is not sufficient.
To overcome the shortcomings, the present invention provides a plug to mitigate or obviate the aforementioned problems.
The objective of the invention is to provide a plug that can solve the shortcoming that the waterproof effect of the conventional plug is insufficient.
The plug has a seat, a circuit board, and the waterproof terminal connector. The seat has two end surfaces, two pins, and a connecting opening. The two pins are disposed on one of the two end surfaces of the seat. The connecting opening is formed through the other one of the two end surfaces of the seat. The circuit board is disposed in the seat and is electrically connected to the two pins.
The waterproof terminal connector has two terminals and a cover. The two terminals are disposed at a spaced interval.
Each one of the two terminals has a tube portion, a division plate, and a connecting portion. The tube portion has an inner surface, two end surfaces, a first opening, a second opening, and a chamber. The first opening is formed through one of the two end surfaces of the tube portion. The second opening is formed through the other one of the two end surfaces of the tube portion. The chamber is formed in the tube portion and communicates with the first opening and the second opening. The division plate is formed in the tube portion and has an outer surface connected to the inner surface of the tube portion completely for dividing the chamber of the tube portion into a first space and a second space. The first space communicates with the first opening. The second space communicates with the second opening. The connecting portion is formed on the tube portion adjacent to the second opening of the tube portion. In the waterproof terminal connector, the connecting portions of the two terminals are inserted into the seat.
The cover is formed by an overmolding process, is connected to the two terminals and fills the second space of the two terminals. The connecting portions of the two terminals protrude out of the cover.
In each one of the two terminals, the chamber of the tube portion is separated into the first space and the second space by the division plate, thereby the first space is not in communication with the second space. The second space is filled with a part of the cover. Water vapor flowing into the second space via the second opening can be stopped by the part of the cover filling the second space, and further can be stopped by the division plate to keep the water vapor from flowing into the first space and the seat. The division plate and the part of the cover filling the second space can provide the double protection for improving the waterproof effect.
Other objectives, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
With reference to
The seat 2 has two end surfaces, two pins 4, and a connecting opening 5. The two pins 4 are disposed on one of the two end surfaces of the seat 2. The circuit board 3 is disposed in the seat 2 and is electrically connected to the two pins 4. The waterproof terminal connector 1 is disposed on the seat 2 and seals the connecting opening 5 of the seat 2.
With reference to
With reference to
With reference to
Furthermore, the cover 20 has a body 21 and a flange 22. The body 21 is connected around the two terminals 10. The connecting portions 13 of the two terminals 10 protrude out of the body 21 of the cover 20. The flange 22 is formed on and laterally extends from the body 21 of the cover 20.
In each one of the two terminals 10, the tube portion 11 has a through hole 18. The through hole 18 is formed through the tube portion 11 and communicates with the second space 162. The cover 20 extends through the through hole 18 when the cover 20 fills the second space 162 for increasing the assembling stability between the cover 20 and the terminal 10. The tube portion 11 has a notch 19. The notch 19 is formed in the tube portion 11, communicates with the first space 161, and extends to the first opening 14. The tube portion 11 has an inclined surface 17. The inclined surface 17 is formed on the tube portion 11 adjacent to the second opening 15.
In each one of the two terminals 10 of the waterproof terminal connector 1, the part of the cover 20 fills the second space 162 of the terminal 10 to form a first waterproof protection. Water vapor can hardly flow into the second space 162 of the terminal 10. The division plate 12 is disposed in the tube portion 11 of the terminal 10, and the outer surface of the division plate 12 is completely connected to the inner surface of the tube portion 11. The first space 161 is not in communication with the second space 162 due to the division plate 12. The division plate 12 can stop the water vapor to form a second waterproof protection. After the waterproof terminal connector 1 is disposed on the seat 2, the water vapor is prevented from flowing into the seat 2 by the filled second space 162 and the division plate 12.
Accordingly, the waterproof terminal connector 1 provides the first waterproof protection and the second waterproof protection. The second waterproof protection formed by the division plate 12 can provide a good waterproof effect. The waterproof effect of the plug is improved.
