EP-3754791-B1 - ELECTRICAL CONNECTOR WITH WATERPROOF STRUCTURE AND THE MANUFACTURING METHOD

Inventors

• CHANG, CHUN FENG

Dates

Publication Date

20260506

Application Date

20191010

Claims (4)

1. An electrical connector (100) with waterproof structure comprising: a base (101) to support components, wherein said base (101) includes a connecting groove (105) located on said base (101) with open slot shape, in a way that said base (101) can be penetrated from an upper end and a lower end; a connecting unit (107) mounted on said connecting groove (105) and exposed out of said base (101), a housing (103) configured to enclose said components, said base (101) and said connecting groove (105); and an upper lid (117) configured to seal said base (101) to prevent moisture and particles from entering said electrical connector (100), characterised in that the connector further comprises at least one electrical cable (123) on said connecting unit (107) which penetrates an inner side of said base (101) through a pore disposed on said base (101) and is coupled to said connecting unit (107) through said connecting groove (105) in a longitudinal direction, wherein the connector further comprises a plurality of retaining blocks (109, 111) located on said base (101), configured to enclose said connecting unit (107); and disposed between said connecting groove (105) and the outer wall of said housing (103), wherein a space enclosed by said plurality of retaining blocks (109, 111) forms waterproof compartments (113), wherein said waterproof compartments (113) are filled with a waterproof glue (115).
2. The electrical connector (100) of claim 1, further characterized by comprising a circuit board (125) mounted inside said base (101), coupling said connecting unit (107) through said at least one electrical cable (123).
3. The electrical connector (100) of claim 1, characterized in that said waterproof glue (115) includes Silicone, Epoxy, Polyurethane, Butyl Rubber, Hypalon Polyethylene Rubber, Natural Rubber, Polyacrylate Rubber, Neoprene Rubber, or the combination thereof.
4. The electrical connector (100) of claim 1, characterized in that said connecting groove (105) is disposed on a top end of said upper lid (117).

Description

TECHNICAL FIELD The present invention relates to an electrical connector with waterproof structure, more particularly, said electrical connector is injected with rubber material into inner space for increasing airtightness, preventing the moisture or suspended particles infiltrate into the electrical connector. BACKGROUND Since the wide applications of electrical power to the human civilization, various functional appliances have begun to enter people's lives. Among them, the connectors are installed in various types of electronic devices, which are placed inside the housing of electronic devices for connecting with appliances. The functions of the connectors comprise transmitting the electrical power or electrical signals, for instance, computers, mobile phones, tablet, wearable devices, and detecting instruments commonly used in the business market are equipped with connectors, which specification might be USB, RS 232, DVI, or HDMI, mounting in the socket corresponding to the size and shape of the connectors for coupling to the two electronic devices or electrical power. In the prior art, the airtightness between the connector and the connecting wire is not enough, resulting to the moisture or suspended particles easily infiltrate or accumulate in the electrical connector. In addition, the existence of the gap at the surface between the male connector and female connector cause the poor effect of water resist, making the connector could only be used in the drying environment, once the connector is exposed to the environment with relatively high humidity, moisture or liquid could easily infiltrate from the gap of the surface to the electrode located inside the connector, causing the short circuit damage or electrical leakage, raising the risk of electric shock. Further, the electrode corrosion resulting from the moisture may lead to the voltage rise instantaneously of the connector, lowering down the lifetime of the connector, even the fire hazard. Therefore, at present, some manufacturers have introduced a kind of electrical connector such as Taiwan Patent M551776, the prior art '776 discloses an electrical connector with waterproof pad, including insulation body (namely, the housing), conductive structure (including electrode and conductive sheet); waterproof pad (the moisture or liquid could not infiltrate inside because the conductive structure is sealed through the deformation of waterproof pad while it is extruded). The waterproof structure of the prior art '776 mainly relies on the waterproof pad to be deposited on the bottom portion of the electrical connector, therefore, the possible disadvantage is that if the waterproof pad has a large tolerance with the insulation body during the production process, the shape of the waterproof pad may not seal as well as expected; furthermore, if the variation of the ambient temperature is large, or the use time is long, it may gradually lose the elasticity of the waterproof pad, so that the infiltration probability of moisture or suspended particles would be larger, causing the corrosion of the electrode. Take the WO2019/092749 as another example, the '749 proposes an electrical connector, on which the preamble of claim 1 is based, with a structure comprising: the cover, housing, connector receptacle, separator wall and cap, the sealing mechanism is to enclose the connector receptacle with the gasket and the separator wall, the waterproof glue is poured into the top space 98, middle space 34, bottom space 99 to prevent moisture from entering the connector. However, the waterproof glue fully disposes on said space and contact with the electronic elements may result in the large weight and difficult to have the maintenance or reparation of the electrical connector. Furthermore, the CN105449442 proposes a waterproof wiring device, comprises: housing, an interface bin, a wire outlet, a glue pouring pool, however, it is worth noting that the volume ratio of glue pouring pool is much more less than the entire waterproof wiring device, it may lead to insufficient performance of waterproof. Thus, at the current time, it is still demand to improve the waterproof structure for achieving higher performance of waterproof and dust-proof. SUMMARY OF THE INVENTION In view of the disadvantages of the prior art, the present invention provides an electrical connector with waterproof structure according to claim 1, comprising: a base, providing the support of components in the electrical connector, where the base includes a connecting groove located on the base with open slot shape, making the base been penetrated from an upper end and a lower end; a connecting unit mounted on the connecting groove and exposed out of the base, where at least one electrical cable on the connecting unit penetrates inner side of the base through a pore disposed on the base, and a connecting wire being coupled to the connecting unit through the connecting groove in longitudinal direction; a housing,