CN201718141U

CN201718141U - Printed circuit board plug-free waterproof sealing device

Info

Publication number: CN201718141U
Application number: CN2010202633256U
Authority: CN
Inventors: 时维铎; 燕元超; 孟琪
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-16
Filing date: 2010-07-16
Publication date: 2011-01-19
Anticipated expiration: 2020-07-16

Abstract

The utility model relates to a printed circuit board plug-free waterproof sealing device. The structure of the device is that both ends of the printed circuit board are sealed in the PVC flexible pipe, a signal line is led from the sealed part between the PVC flexible pipe and the both ends of the printed circuit board. The utility model solves the defects of the methods in the prior art of coating moistureproof insulation gel and electronic filling-sealing gel to waterproof the electric appliance in the environment where has water or is moisture. The circuit board is completely sealed in a plastic bag with both ends welded, so the device is suitable for being used in moisture environment of certain acid and alkaline, such as toilet etc. The PVC flexible pipe is a commonly used insulating material and has enough dielectric strength. The device is free of conventional structures such as specially-produced housing, sealing ring, or connector etc., so the shape size is smaller.

Description

Printed circuit board (PCB) does not have the plug waterproof seal

Technical field

The utility model relates to a kind of water-tight device, and particularly a kind of printed circuit board (PCB) does not have the plug waterproof seal.

Background technology

Use electric device in the place that water is arranged, just need waterproof, protection against the tide especially, the electric device that electric heating is used as water closet just needs waterproof sealing.The waterproof measure of printed circuit board (PCB) generally adopts spraying damp proof insulation glue or circuit board is put in the plastic casing and seals with electron pouring sealant.Spraying damp proof insulation glue is to form thin film on the surface of circuit board and device, has certain waterproof ability, but is unable to undergo long-time high humility and has the invasion and attack of certain Acidity of Aikalinity solution.Electron pouring sealant is with special transparent colloid, and perfusion covers whole printed circuit board (PCB) and all elements up to colloid in vacuum tank, at high temperature solidifies then.Obviously, this method needs higher cost, and complex process.

Summary of the invention

The purpose of this utility model just is to overcome the defective of above-mentioned prior art, develops a kind of succinct printed circuit board (PCB) water-tight device.

The technical solution of the utility model is:

Printed circuit board (PCB) does not have the plug waterproof seal, and its major technique is characterised in that printed circuit board (PCB) is sealed at both ends in the PVC flexible pipe, and holding wire is by extracting with sealed at both ends sealing place of printed circuit board (PCB) in the PVC flexible pipe.

Advantage of the present utility model and effect are that the cost of PVC flexible pipe is very low, and welding only needs several seconds, the efficient height.Yet welding back circuit board similarly is to be put into two ends to be welded in the dead plastic bag, sealing fully.Be fit to very much to be applied to toilet etc. and have certain Acidity of Aikalinity and moist environment.The PVC flexible pipe is the insulating material of using always, has enough dielectric strengths.Owing to need not traditional structures such as special shell, sealing ring, connector, so overall dimension is smaller.

Description of drawings

Fig. 1---printed circuit board (PCB) profile schematic diagram.

Fig. 2---the circuit board PVC flexible pipe schematic diagram of packing into

Fig. 3---the circuit board PVC flexible pipe end view of packing into

Fig. 4---circuit board sealing schematic diagram

Embodiment

As shown in Figure 1:

At first printed circuit board (PCB) 2 is designed to be fit to the tall and thin shape of PVC flexible pipe of packing into, be convenient to pack in the flexible pipe, next is the anti-pulling eye 4 of lead-in wire that is provided with respective numbers at the two ends of printed circuit board (PCB) 2, power line, holding wire (lead-in wire) 3 that needs are drawn pass and draw from the anti-pulling eye 4 at circuit board 2 two ends, if not anti-pulling eye 4 is even holding wire 3 also is easy to come off in assembling process after the sealing; The S shape that anti-pulling eye 4 utilizes lead-in wire to form when passing the hole can effectively be improved electronics line tensile strength; Anti-pulling eye 4 is simple in structure, and effect is remarkable, and it does not need fixtures such as special wire clamp, screw.

As shown in Figure 2:

Printed circuit board (PCB) 2 is put into PVC flexible pipe 1, and holding wire 3 is drawn from the two ends of PVC flexible pipe 1.Utilize high-frequency welder with the tight pressing in PVC flexible pipe 1 two ends.

As shown in Figure 3, Figure 4:

Because printed circuit board (PCB) 2 is isolated fully with the external world, if can not ignite on every side object or pollute surrounding air of faults such as smog, burning appears in inner circuit.

As everyone knows, the PVC flexible pipe issues muon polarization phenomenon estranged in the effect of high-frequency electric field, and press direction of an electric field and arrange, because of high-frequency electric field, change direction at a terrific speed, PVC flexible pipe then, will generate heat because of dielectric loss, even fusing, utilize this principle and the equipment closed at both ends with the PVC flexible pipe, wherein the material because of wire insulation also is PVC usually, so the insulating barrier of PVC flexible pipe and lead is melted simultaneously under the effect of high-frequency electric field, apply certain pressure this moment, lead and PVC flexible pipe merged in the lump and the mouth of pipe of PVC flexible pipe is sealed.Sealing that can printed circuit board (PCB) 2 is complete after the pressing is communicated with printed circuit board (PCB) 2 in the sealed tube by lead.

This is a kind of sealed-for-life, cannot open maintenance and then reinstatement.So needn't consider how to dismantle, as long as how more firm consideration is, sealing effectiveness is better.This waterproof type is more flexible, not only can the potted circuit plate, also can seal some individual devices, as electric capacity, fuse etc.It can seal as the parts that sausage will need to seal one by one, and a live wire connects between the parts.Do not need special waterproof cabinet, waterproof plug etc.PVC has high temperature performance preferably, longer service life under the normal temperature, as long as the not perforation of the tube wall of flexible pipe, its sealing property is considerably beyond forms such as spraying and encapsulatings.This makes water resistance be greatly improved, and simultaneously, the waterproof cost reduces significantly.

The utility model is applicable to the electronic device that needs waterproof, as the electrical equipment waterproof sealing in the electric heating toilet lid.

Claims

1. printed circuit board (PCB) does not have the plug waterproof seal, it is characterized in that printed circuit board (PCB) is sealed at both ends in the PVC flexible pipe, and holding wire is by extracting with sealed at both ends sealing place of printed circuit board (PCB) in the PVC flexible pipe.

2. printed circuit board (PCB) according to claim 1 does not have the plug waterproof seal, it is characterized in that printed circuit board (PCB) is provided with anti-pulling eye, holding wire above printed circuit board (PCB) or below pass anti-pulling eye to printed circuit board (PCB) or above by extracting with sealed at both ends sealing place of printed circuit board (PCB) in the PVC flexible pipe.