CN200986465Y

CN200986465Y - Circuit board water-proof structure for electronic scales

Info

Publication number: CN200986465Y
Application number: CN 200620147416
Authority: CN
Inventors: 潘奇浩
Original assignee: YINGZHAN INDUSTRIAL Co Ltd
Current assignee: YINGZHAN INDUSTRIAL Co Ltd; Excell Precision Co Ltd
Priority date: 2006-11-10
Filing date: 2006-11-10
Publication date: 2007-12-05
Anticipated expiration: 2016-11-10

Abstract

The utility model provides a circuit board watertight structure for an electronic scale. Regarding the utility model, primarily, compartments to accommodate circuit boards are provided inside an enclosure of the electronic scale. A cover board is provided at the port of each of the compartments; and a hold-down strip is applied at the port for closing the port. A through hole is provided at a selected position on the cover board, and is communicated with outside. A breathing mould is filled in the through hole. As the breathing mold has the effects of breathing and water tightness, the air pressure inside the compartments is kept equal to ambient pressure all along, and moreover, the circuit boards in the compartments are not wetted.

Description

The circuit board waterproof construction of electronic scales

Technical field

The utility model refers to especially that relevant for a kind of circuit board waterproof construction of electronic scales a kind of circuit board of electronic scales that makes forms obstruct with extraneous, but and the moisture-proof construction of balance compartment inner and outer air pressure design.

Background technology

General electronic scales is to make its effect that can reach waterproof, can be applied with the compartment design that intercepts infiltration in the inside of scale body, and the pressure inductor or the circuit component that are arranged at compartment interior with order do not have the anxiety of making moist.

But, when electronic scales during in airtight this pressure inductor or circuit component, often the air pressure of environment of living in (being production plant) envelope is located in the compartment, so, when this electronic scales is in different air pressure environment following time, air pressure in this compartment then with ambient pressure difference to some extent, cause influencing the measuring accuracy of pressure inductor, more so the person has the obturation effect that destroys compartment, makes the waterproof effect impaired, for a long time it can make circuit component produce fault because of making moist or influences precision.For this reason, the road of inventor's active research improvement, and generation of the present utility model is arranged eventually.

Summary of the invention

The purpose of this utility model is to provide a kind of circuit board waterproof construction of electronic scales, make electronic scales be in different following times of air pressure environment, air pressure in this circuit board component waterproof insulating space of living in, must adjust at any time with the variation of external atmospheric pressure, also must keep the integrality of this insulating space water-proof sealing effect simultaneously.

Another purpose of the present utility model is to provide a kind of circuit board waterproof construction of electronic scales, should ventilative mould material be with metal materials such as bronze or stainless steels with the PM technique die cast, the ventilative mould material of order meets the waterproof test of international standard (IEC standard 529 IPX6 grades).

For reaching above-mentioned purpose, the circuit board waterproof construction of electronic scales of the present utility model, its mainly be in the casing inner area of electronic scales every be provided with can ccontaining circuit board compartment, make the port of compartment apply press strip and give closure with a cover plate, and offer a through hole in the cover plate chosen place and be in communication with the outside, and in through hole filling one ventilative mould material.

From the above mentioned, the circuit board waterproof construction of electronic scales of the present utility model has the only ventilative effect that must not seep water by ventilative mould material, and the permanent maintenance of air pressure in the compartment is equated with ambient pressure, simultaneously also make compartment possess the effect of water-proof sealing, the anxiety that its inner circuit board is not made moist.

Description of drawings

Figure 1 shows that the stereoscopic synoptic diagram of the utility model electronic scales.

Figure 2 shows that exploded perspective synoptic diagram of the present utility model.

Figure 3 shows that combination schematic perspective view of the present utility model.

Figure 4 shows that the combination diagrammatic cross-section of the utility model electronic scales.

Figure 5 shows that the local combination diagrammatic cross-section of amplifying of the utility model.

Drawing reference numeral:

10------electronic scales 1------casings

11------compartment 111---ports

112------groove 2------circuit boards

21------lead 3------cover plates

31------through hole 32------perforation

33------conduit 4------press strips

5------the mould material of breathing freely

Embodiment

As shown in Figures 1 to 4, the circuit board waterproof construction of electronic scales of the present utility model, mainly be casing 1 inner area that makes electronic scales 10 every be provided with can ccontaining circuit board 2 compartment 11, make the port one 11 of compartment 11 cooperate a rubber-like press strip 4 and give closure with a cover plate 3, and offering a through hole 31 in cover plate 3 chosen places is in communication with the outside, and in through hole 31 fillings one ventilative mould material 5, air permeable waterproof effect by ventilative mould material 5, make the permanent maintenance of air pressure in the compartment 11 equate the anxiety that also makes the circuit boards 2 in the compartment 11 not make moist simultaneously with ambient pressure.

Aforementioned cover plate 3 is made with a rubber-like colloidal materials, make cover plate 3 except that offer a through hole 31 in chosen place, must offer in addition a plurality of perforation 32 passes through with the lead 21 of power circuit board 2, then around forming a conduit 33 of diving concavity, it is wide to make the groove width of conduit 33 be slightly less than the footpath of press strip 4 in the periphery of cover plate 3; The formation of above-mentioned again port one 11, be around compartment 11 ora terminalis with a groove 112, make conduit 33 back of the body end of cover plate 3 plant embedding with groove 112 is adaptive mutually, so, after port one 11 places that cover plate 3 is covered in compartment 11 make that conduit 33 is heavy and are located in the groove 112, pressure bar 4 is given as security in the conduit 33, force conduit 33 outer walls and groove 112 inwalls to be a fit-state (as shown in Figure 5) closely, make the environment in the compartment 11 present absolute air-tight state in the rim place of cover plate 3 with the external worlds.

In addition, pass through back (as shown in Figure 3) as the perforation 32 that above-mentioned cover plate 3 is provided with in the lead 21 of

circuit board

2,32 the orifice part of boring a hole in season imposes gummed (as with the sharp health glue perfusion of silicon filling), so can under the sealing state that does not influence cover plate 3, make lead 21 pass compartment 11 and reach the effect that the signal transmission connects.

Moreover, owing to should ventilative mould material 5 be with the PM technique die cast with metal materials such as bronze or stainless steels, the ventilative mould material 5 of order must meet the waterproof test of international standard (IEC standard 529 IPX6 grades), and its characteristic is ventilative must not the infiltration only, so when ventilative mould material 5 is glued at through hole 31 places, make the inside and outside gas permeable of compartment 11 should breathe freely mould material 5 and form the conducting shape.So, when electronic scales 10 is in different following times of air pressure environment, can make air pressure and the extraneous mutual adjustment of air pressure in the compartment 11, make cover plate 3 can not be out of shape the effectiveness that loses waterproof because of uneven the causing of air pressure in the compartment 11 and extraneous air pressure, so, when guaranteeing that circuit board 2 does not have the damage facts that causes short circuit etc. of making moist and takes place in compartment 11.

In sum, the circuit board waterproof construction of visible electronic scales of the present utility model really makes the air pressure in the compartment can reach and the adjustment of ambient pressure self-poise, and also reaches the expection waterproof effect.

Though the utility model discloses with specific embodiment; but it is not in order to limit the utility model; any those skilled in the art; the displacement of the equivalent assemblies of under the prerequisite that does not break away from design of the present utility model and scope, having done; or, all should still belong to the category that this patent is contained according to equivalent variations and modification that the utility model scope of patent protection is done.

Claims

1. the circuit board waterproof construction of an electronic scales, it is characterized in that: the casing inner area of electronic scales is every the compartment that is provided with ccontaining circuit board, the port of compartment cooperates a rubber-like press strip to give the gland closure with a cover plate, cover plate is offered a through hole in chosen place and is in communication with the outside, in through hole filling one ventilative mould material.

2. the circuit board waterproof construction of electronic scales as claimed in claim 1, it is characterized in that: this cover plate is made with the rubber-like colloidal materials.

3. the circuit board waterproof construction of electronic scales as claimed in claim 1 is characterized in that: around forming a conduit of diving concavity, it is wide that the groove width of conduit is slightly less than the footpath of press strip in the periphery ring of cover plate.

4. the circuit board waterproof construction of electronic scales as claimed in claim 1 is characterized in that: the port part of this compartment is around being provided with a groove.