HK1167750B - A short-circuit-free mains extension board in case of water seepage - Google Patents

Description

Power expansion board capable of preventing short circuit in water seepage

Technical Field

The invention relates to a power supply expansion board, in particular to a power supply expansion board which can not be short-circuited when water seepage occurs.

Background

The power supply expansion board is an electric appliance product which is used for realizing electric connection through the insertion of an external plug in daily life, and people often touch the environment with water or water is splashed onto the power supply expansion board carelessly in the using process, so that accidents are caused. Therefore, technicians have developed waterproof power expansion boards, which have waterproof covers outside the sockets to prevent water from penetrating into the socket holes, and some of the waterproof power expansion boards have sealing rings outside the socket holes to seal the plugs and the sockets when the plugs are inserted into the socket holes. In the prior art, the waterproof effect cannot be really achieved, if a waterproof cover is not covered, or the contact surface between the plug and the socket is not tight, and the sealing ring cannot play a waterproof role, all parts in the socket can be wet, and when a power supply is switched on, short circuit is easily generated to cause fire or electric shock accidents.

Disclosure of Invention

The invention aims to provide a power supply expansion board which has a simple structure and can not cause short circuit after water seeps into a socket hole aiming at the defects.

The technical scheme adopted by the invention for solving the technical problems is as follows: a power expansion board capable of preventing short circuit when water seepage occurs comprises an upper shell, a lower shell and a jack seat, wherein the upper shell is provided with at least one set of jack seat units integrated with the upper shell in an injection molding mode, the lower shell is provided with a wire holder matched with the jack seat of the upper shell, an electrode conducting strip is arranged in a groove of the wire holder and is electrically connected with an external lead, an elastic contact piece is tightly clamped between the lower end face of the jack seat and the upper end face of the wire holder, a space is reserved between the elastic contact piece and the electrode conducting strip, a drain hole is formed in the jack side wall of the jack seat close to the upper end face of the elastic contact piece and connected with a water outlet hole in the side wall of the upper shell through a hose, a convex protruding piece is arranged on the side wall of the top end.

The upper shell is provided with two jack seat units consisting of jack seats of a group of live wire jacks and jack seats of zero wire jacks, or three jack seat units consisting of jack seats of a group of live wire jacks, jack seats of zero wire jacks and jack seats of ground wire jacks, or jack seat units consisting of a plurality of groups of two jack seat units and three jack seat units.

The wire holder and the lower shell are integrally formed in an injection molding mode.

The electrode conducting strip is fixed in the groove of the wire holder through a screw, and one end of the electrode conducting strip extends out of the wire holder and is connected with a lead.

The elastic contact piece is formed by injecting and combining a metal piece and an elastic material, and the elastic material is made of a high-temperature-resistant elastic material.

The peripheral plane of the metal sheet of the elastic contact piece is provided with insections, two central surfaces of the metal sheet slightly bulge outwards, the bulged parts are exposed out of the elastic material, and the periphery of the metal sheet is injected into the elastic material.

The joint end of the upper shell and the lower shell is lined with a sealing washer and fixed by a screw, the screw is provided with a waterproof sealing gasket, and a waterproof plug is arranged outside the screw hole.

And a sealing ring is arranged at the joint of the external lead and the shell.

According to the invention, the sealing ring is arranged at the joint between the upper shell and the lower shell, the elastic contact piece is arranged in the jack of the jack seat, so that the permeation of external water into the power expansion board is isolated, the water entering the jack is discharged out of the shell from the water discharge hole in the jack, the water condensation condition does not exist in the jack, the occurrence of power supply short-circuit accidents caused by the water immersion is avoided, and the waterproof effect is achieved. A certain space is reserved between the elastic contact piece and the electrode conducting strip in the jack, so that the elastic contact piece is not contacted with the electrode conducting strip, the elastic contact piece is uncharged in the jack, electric shock cannot be caused even if foreign matters enter the jack, only when the plug is forcibly inserted, the two electrodes of the plug tightly press the metal sheet in the elastic contact piece to be contacted with the electrode conducting strip, current conduction is conducted, when the plug is pulled out, the elastic contact piece is separated from the electrode conducting strip under the action of elastic force, and the purpose of preventing electric shock for peaceful life is achieved. The invention has the advantages that: simple structure, low manufacturing cost and good safety and waterproof performance.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic structural view of the section A-A in FIG. 1 according to the present invention.

Fig. 3 is a schematic perspective exploded view of the upper and lower housings of the present invention.

Fig. 4 is a schematic cross-sectional view of the B-B resilient contact of fig. 3 according to the present invention.

Fig. 5 is a schematic perspective view of the present invention.

In the figure: 1. the waterproof socket comprises an upper shell, 101 water outlet holes, 2 lower shell, 3 jack seats, 301 drain holes, 302 protruding pieces, 303 jacks, 304 jack seat lower end faces, 4 elastic contact pieces, 401 elastic materials, 402 metal sheets, 403 insections, 404 metal sheet bulging parts, 5 wire holders, 501 wire holder upper end faces, 6 electrode conducting pieces, 601 screws, 602 electrode conducting pieces, 7 sealing gaskets, 8 sealing gaskets, 9 conducting wires, 10 hoses, 11 screws, 1101 sealing gaskets, 1102 waterproof leather plugs, 12 second jack seat units and 13 third jack seat units.

The invention is described in further detail below with reference to the figures and examples.

Detailed Description

As shown in fig. 1-5, a power expansion board that infiltration can not short circuit, includes casing 1, casing 2, jack seat 3 down, it is equipped with 3 units of a set of jack seat at least rather than the integrative one-tenth of injection moulding to go up casing 1, and casing 1 is equipped with two jack seat units 12 and three jack seat units 13 that the jack seat of two sets of live wire jacks, the jack seat of zero line jack and the jack seat of ground wire jack of jack seat constitution rather than the integrative jack seat of a set of live wire jack and zero line jack of injection moulding on this embodiment. The lower shell 2 is provided with a wire holder 5 matched with each unit jack seat of the upper shell, the wire holder 5 and the lower shell 2 are molded into a whole by injection, an electrode conducting strip 6 is arranged in a groove of the wire holder and is fixed in the groove of the wire holder by a screw 601, one end 602 of the electrode conducting strip extends out of the wire holder 5 and is electrically connected with an external lead 9, the lower end face 304 of the jack seat and the upper end face 501 of the wire holder tightly clamp an elastic contact piece 4, so that the elastic contact piece seals the jack seat jack 303, water seeps into the jack seat and cannot flow inwards, the elastic contact piece 4 is made of high-temperature resistant elastic material, a metal sheet 402 and an elastic material 401 are injected together, the metal sheet is formed by stamping a copper material with good electric conductivity, the peripheral plane of the metal sheet is provided with insections 403, the insections enable the elastic material and the metal sheet to be better injected together, the centers of the two sides of the metal sheet slightly bulge outwards, and the, the exposed part can be contacted with two electrodes of the plug and the electrode conducting strip 6, the metal sheet is injected in the elastic material around, a space is reserved between the lower end of the elastic contact piece 4 and the electrode conducting strip 6, the elastic contact piece is not contacted with the electrode conducting strip, the elastic contact piece is uncharged in the jack, even if foreign matters enter the jack, electric shock cannot be caused, only when the plug is forcibly inserted, the two electrodes of the plug press the metal sheet bulging part 404 in the elastic contact piece to be contacted with the electrode conducting strip 6, current conduction is realized, and when the plug is pulled out, the elastic contact piece 4 is separated from the electrode conducting strip 6 under the action of elastic force, so that the safety protection effect is realized. The side wall of the jack 303 of the jack seat close to the upper end face of the elastic contact piece is provided with a drain hole 301, the drain holes of the jack seats with the same poles are connected through a hose 10, the hose is connected with a water outlet hole 101 formed in the two side walls of the upper shell, if water seeps into the jack, the water flows out of the shell from the drain hole, no water accumulation exists in the jack 303, and no water enters the shell. The side wall of the top end of the jack seat is provided with a convex protruding piece 302, so that the electrode plate of the plug is tightly supported when the plug is inserted, and the electrode plate of the plug is not loosened. The joint of the upper shell 1 and the lower shell 2 is provided with a sealing gasket 7, the upper shell and the lower shell are fixed through a screw 11, the screw is provided with a waterproof sealing gasket 1101, a waterproof leather plug 1102 is arranged outside the screw hole, and the joint of the external lead and the shell is provided with a sealing gasket 8. The invention isolates the infiltration of external moisture into the power supply expansion board, and the power supply expansion board can not cause short circuit if immersed into water, thereby achieving the purpose of safety and water resistance.

Claims (8)

1. The utility model provides a power expansion board that infiltration can not short circuit, includes casing, lower casing, jack seat, its characterized in that: the improved socket comprises an upper shell, a lower shell, a wire holder, an electrode conducting strip, a flexible contact piece, a water outlet hole, a convex protruding piece and a sealing washer, wherein the upper shell is provided with at least one group of socket units integrated with the upper shell in an injection molding mode, the lower shell is provided with the wire holder matched with the socket of the upper shell, the groove of the wire holder is internally provided with the electrode conducting strip, the electrode conducting strip is electrically connected with an external lead, the lower end face of the socket and the upper end face of the wire holder tightly clamp the flexible contact piece, a space is reserved between the flexible contact piece and the electrode conducting strip, the side wall of the socket jack is provided with the water outlet hole close to the upper.

2. The power expansion board of claim 1, wherein the power expansion board is water permeable and free of short circuit, and comprises: the upper shell is provided with two jack seat units consisting of jack seats of a group of live wire jacks and jack seats of zero wire jacks, or three jack seat units consisting of jack seats of a group of live wire jacks, jack seats of zero wire jacks and jack seats of ground wire jacks, or jack seat units consisting of a plurality of groups of two jack seat units and three jack seat units.

3. The power expansion board of claim 1, wherein the power expansion board is water permeable and free of short circuit, and comprises: the wire holder and the lower shell are integrally formed in an injection molding mode.

4. The power expansion board of claim 1, wherein the power expansion board is water permeable and free of short circuit, and comprises: the electrode conducting strip is fixed in the groove of the wire holder through a screw, and one end of the electrode conducting strip extends out of the wire holder and is connected with a lead.

5. The power expansion board of claim 1, wherein the power expansion board is water permeable and free of short circuit, and comprises: the elastic contact piece is formed by injecting a metal sheet and an elastic material, and the elastic material is made of a high-temperature-resistant elastic material.

6. The power expansion board of claim 5, wherein the power expansion board is water permeable and free of short circuit, and comprises: the peripheral plane of the metal sheet of the elastic contact piece is provided with insections, two central surfaces of the metal sheet slightly bulge outwards, the bulged parts are exposed out of the elastic material, and the periphery of the metal sheet is injected into the elastic material.

7. The power expansion board of claim 1, wherein the power expansion board is water permeable and free of short circuit, and comprises: the joint end of the upper shell and the lower shell is lined with a sealing washer and fixed by a screw, the screw is provided with a waterproof sealing gasket, and a waterproof plug is arranged outside the screw hole.

8. The power expansion board of claim 1, wherein the power expansion board is water permeable and free of short circuit, and comprises: and a sealing ring is arranged at the joint of the external lead and the shell.