CN213847345U

CN213847345U - Waterproof circuit board

Info

Publication number: CN213847345U
Application number: CN202022786339.2U
Authority: CN
Inventors: 马文雄
Original assignee: Jiangmen Xinshan Electronic Technology Co ltd
Current assignee: Jiangmen Xinshan Electronic Technology Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-07-30
Anticipated expiration: 2030-11-26

Abstract

The utility model relates to the technical field of circuit boards, and discloses a waterproof circuit board, wherein a circuit board body is arranged at the bottom of a mounting groove, the mounting groove is provided with a placing groove, a heat conducting plate, a drying plate and a cover plate are sequentially arranged on the placing groove from the bottom to a notch, the cover plate is detachably connected with a mounting seat, the groove wall of the placing groove is provided with an exhaust hole, a one-way ventilation component is arranged in the exhaust hole, the exhaust hole comprises a large cylindrical hole, a first conical hole and a small cylindrical hole which are sequentially arranged from outside to inside and are mutually communicated, the one-way ventilation component comprises a hollow adjusting nut and a plug, the plug is made of water-absorbing resin, the hollow adjusting nut is connected with the large cylindrical hole, the plug is movably arranged in the first conical hole, a compression spring is arranged between the plug and the hollow adjusting nut, the plug is in sealing fit with the inner wall of the first conical hole under the action of the compression spring, the groove wall of the mounting groove is provided with a line-passing hole, the water absorbing assembly is arranged in the wire passing hole. The utility model has the advantages of good heat dispersion, good sealing performance and long service life.

Description

Waterproof circuit board

Technical Field

The utility model relates to a circuit board technical field especially relates to a waterproof circuit board.

Background

The circuit board is electronic components's supporter, be electronic components electrical connection's carrier, by extensive application in various electronic products, the biggest natural enemy of circuit board is exactly moisture and rainwater, electronic equipment intakes or makes the circuit board appear corroding easily by the tide, may cause the electronic device short circuit even, cause the loss that can't retrieve, current waterproof circuit board majority realizes waterproofly through encapsulating resin and scribble three proofings lacquer, but encapsulating resin can cause the big problem of the later stage difficulty of reprocessing, the waterproof effect of two scribbling three proofings lacquer is relatively poor, and environmental protection not enough.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: the waterproof circuit board is good in heat dissipation performance, sealing performance and service life.

In order to solve the technical problem, the utility model provides a waterproof circuit board, which comprises a circuit board body and a mounting seat, wherein the mounting seat is provided with a mounting groove, the circuit board body is arranged at the groove bottom of the mounting groove, the mounting groove is provided with a placing groove, the placing groove is sequentially provided with a heat conducting plate, a drying plate and a cover plate from the groove bottom to a groove opening, the cover plate and the mounting seat are detachably connected, the groove wall of the placing groove is provided with an exhaust hole communicated with the outside, the exhaust hole is opposite to the drying plate, the exhaust hole is internally provided with a one-way ventilation component capable of discharging hot air in the waterproof circuit board to the outside, the exhaust hole comprises a large cylindrical hole, a first conical hole and a small cylindrical hole which are sequentially arranged from the outside to the inside and are mutually communicated, the one-way ventilation component comprises a hollow adjusting nut and a plug, and the plug is made of water-absorbing resin, the hollow adjusting nut is in threaded connection with the large cylindrical hole, the plug is movably arranged in the first conical hole, a compression spring is arranged between the plug and the hollow adjusting nut, the plug is in sealing fit with the inner wall of the first conical hole under the action of the compression spring, a line passing hole communicated with the outside is formed in the groove wall of the mounting groove, and a water absorbing assembly for preventing water from permeating is arranged in the line passing hole.

As the utility model discloses preferred scheme, cross the line hole and include cylinder hole and the second taper hole that sets gradually and communicate each other from outer to interior, the subassembly that absorbs water includes interconnect's elastic sealing circle and shrouding, the middle part of shrouding and elastic sealing circle all is equipped with the electric wire hole that the available power supply line passed, the shrouding with cylinder hole threaded connection, elastic sealing circle sets up second taper hole.

As the utility model discloses preferred scheme, be equipped with the pad that absorbs water between elastic seal circle and the shrouding, the material of pad that absorbs water is water-absorbent resin.

As the preferred scheme of the utility model, the drying plate includes flexible water permeable bag and fills the drier in flexible water permeable bag.

As the utility model discloses preferred scheme, the material of mount pad is transparent material.

As the utility model discloses preferred scheme, the material of flexible permeable bag is transparent material, flexible permeable bag all fills there is allochroic silica gel in the bag.

As the utility model discloses preferred scheme, the exhaust hole sets up a plurality ofly and evenly sets up along the circumferencial direction interval on the mount pad.

As the utility model discloses preferred scheme, the mount pad upper cover is equipped with the protection casing, the upper surface of protection casing is middle outstanding arcwall face that makes progress.

As the utility model discloses preferred scheme, be equipped with the recess on the protection casing, the mount pad sets up in the recess.

As the utility model discloses preferred scheme, the protection casing with mount pad threaded connection.

The embodiment of the utility model provides a waterproof circuit board compares with prior art, and its beneficial effect lies in:

1. when the circuit board body works, the temperature in the mounting seat is continuously raised, the pressure in the mounting seat is gradually increased until the elastic force of the compression spring can be overcome to push the plug away outwards, so that the plug leaves the taper hole, the heat in the mounting seat can be discharged to the outside, the temperature in the mounting seat is reduced, and the heat dissipation performance is improved; when the circuit board body is closed, the pressure in the mounting seat is gradually reduced, at the moment, the external pressure is greater than the pressure in the mounting seat, the plug is reset under the action of the spring, the orifice of the small cylindrical hole is plugged, so that the external heat is prevented from entering the mounting seat, the sealing performance is improved, and the service life of the waterproof circuit board is prolonged;

2. the plug is made of water-absorbent resin, the water-absorbent resin has the characteristic of water absorption expansion, so that the water-absorbent resin is more tightly connected with the first conical hole when absorbing water, rainwater is further prevented from permeating, and the water-absorbent resin has the characteristic of being difficult to separate water even if pressurized, so that when the plug is extruded outwards by hot air in the cavity, the water in the plug can be effectively prevented from flowing into the mounting seat under the action of extrusion force;

3. the utility model can absorb the water flow flowing in when the plug moves and the water vapor in the mounting seat through the arrangement of the drying agent, thereby preventing the phenomenon that the water vapor in the mounting seat causes the fault of the circuit board body and prolonging the service life of the waterproof circuit board;

4. the utility model can take away the heat of the heat conducting plate through the arrangement of the vent holes, accelerate the cooling speed of the heat conducting plate, and simultaneously dry the plug, so that the plug has partial water absorption again;

5. the utility model discloses a setting of heat-conducting plate makes the partial heat transfer in the mount pad to the apron on, the heat of apron transmits the external world again to make the temperature in the mount pad descend, improve heat dispersion, and can also accelerate the stoving of end cap and drying plate.

Drawings

Fig. 1 is a schematic structural diagram of a waterproof circuit board according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the structure of region I in FIG. 1;

in the figure, 1, a circuit board body; 2. a mounting seat; 21. mounting grooves; 22. a placement groove; 23. an exhaust hole; 231. a large cylindrical hole; 232. a first taper hole; 233. a small cylindrical hole; 24. a wire passing hole; 241. a cylindrical bore; 242. a second taper hole; 3. a cover plate; 4. a heat conducting plate; 5. drying the plate; 6. a one-way vent assembly; 61. a hollow adjusting nut; 62. a plug; 63. a compression spring; 7. a water absorbing assembly; 71. an elastic sealing ring; 72. closing the plate; 73. a water absorbent pad; 8. a protective cover; 81. a groove; 9. an electric wire.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, which indicate the orientation or positional relationship, are used in the present invention as being based on the orientation or positional relationship shown in the drawings, and are used only for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be understood that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are used in a generic sense, e.g., fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 and fig. 2, a preferred embodiment of a waterproof circuit board according to a preferred embodiment of the present invention includes a circuit board body 1 and a mounting seat 2, the mounting seat 2 is provided with a mounting groove 21, the circuit board body 1 is mounted on the bottom of the mounting groove 21, the mounting groove 21 is provided with a placement groove 22, the placement groove 22 is provided with a heat conduction plate 4, a drying plate 5 and a cover plate 3 in sequence from the bottom to the opening, the cover plate 3 and the mounting seat 2 are detachably connected, the wall of the placement groove 22 is provided with an exhaust hole 23 communicated with the outside, the exhaust hole 23 is opposite to the drying plate 5, the exhaust hole 23 is provided with a one-way ventilation component 6 capable of exhausting hot air inside the waterproof circuit board to the outside, the exhaust hole 23 includes a large cylindrical hole, a first conical hole 232 and a small cylindrical hole 231 which are sequentially arranged from the outside to the inside and are communicated with each other, the one-way ventilation assembly 6 comprises a hollow adjusting nut 61 and a plug 62, the plug 62 is made of water-absorbent resin, the hollow adjusting nut 61 is in threaded connection with the large cylindrical hole 231, the plug 62 is movably arranged in the first conical hole 232, a compression spring 63 is arranged between the plug 62 and the hollow adjusting nut 61, the plug 62 is in sealing fit with the inner wall of the first conical hole 232 under the action of the compression spring 63, a line passing hole 24 communicated with the outside is arranged on the wall of the mounting groove 21, and a water absorption assembly 7 for preventing water flow from permeating is arranged in the line passing hole 24.

When the circuit board body 1 works, the temperature in the mounting seat 2 is continuously increased, the pressure in the mounting seat 2 is gradually increased until the elastic force of the compression spring 63 can be overcome to push the plug 62 outwards, so that the plug 62 leaves the taper hole, the heat in the mounting seat 2 can be discharged to the outside, the temperature in the mounting seat 2 is reduced, the heat dissipation performance is improved, and the service life of the waterproof circuit board is prolonged; when the circuit board body 1 is closed, the pressure in the mounting seat 2 is gradually reduced, at the moment, the external pressure is greater than the pressure in the mounting seat 2, the plug 62 is reset under the action of the spring, the orifice of the small cylindrical hole 233 is plugged, so that the external heat is prevented from entering the mounting seat 2, the sealing performance is improved, and the service life of the waterproof circuit board is prolonged; the plug 62 is made of water-absorbent resin, the water-absorbent resin has the characteristic of water absorption expansion, so that the connection between the water-absorbent resin and the first tapered hole is tighter when the water-absorbent resin absorbs water, rainwater is further prevented from permeating, and the water-absorbent resin has the characteristic of being difficult to separate water even if the water-absorbent resin is pressurized, so that when the plug 62 is extruded outwards by hot air in the cavity, the water in the plug 62 can be effectively prevented from flowing into the mounting seat 2 under the action of extrusion force; through the arrangement of the drying agent, the water flow flowing into the plug 62 during movement can be absorbed, and the water vapor in the mounting seat 2 can be absorbed, so that the phenomenon that the circuit board body 1 fails due to excessive water vapor in the mounting seat 2 is prevented, and the service life of the waterproof circuit board is prolonged; the arrangement of the exhaust holes 23 can take away the heat of the heat conducting plate 4, accelerate the cooling speed of the heat conducting plate 4, and dry the plug 62 at the same time, so that the plug 62 has partial water absorption again; through the setting of heat-conducting plate 4, make partial heat transfer in mount pad 2 to apron 3 on, the heat of apron 3 transmits to the external world again to make the temperature in mount pad 2 descend, improve heat dispersion, and can also accelerate the stoving of end cap 62 and drying plate 5.

Illustratively, the line through hole 24 comprises a cylindrical hole 241 and a second tapered hole 242 which are arranged in sequence from outside to inside and are communicated with each other, the water absorbing component 7 comprises an elastic sealing ring 71 and a sealing plate 72 which are connected with each other, the sealing plate 72 and the elastic sealing ring 71 are provided with a wire 9 hole for allowing a wire 9 to pass through in the middle, the sealing plate 72 is in threaded connection with the cylindrical hole 241, and the elastic sealing ring 71 is arranged in the second tapered hole 242; therefore, through the sealing connection of the elastic sealing ring 71 and the electric wire 9, rainwater can be prevented from flowing into the electric wire 9 hole, the circuit board short circuit caused by rainwater is prevented, the sealing performance is good, the sealing plate 72 can block part of rainwater, and the rainwater flowing into the electric wire 9 from the sealing plate 72 is reduced.

Illustratively, a water absorption pad 73 is arranged between the elastic sealing ring 71 and the sealing plate 72, and the water absorption pad 73 is made of water-absorbent resin; therefore, the water-absorbent resin has the characteristic of water swelling, so that when the water-absorbent resin absorbs water, the elastic sealing ring 71 is pushed into the mounting groove 21, the connection between the elastic sealing ring 71 and the second taper hole is tighter, rainwater is further prevented from permeating, and the water-absorbent resin has the characteristic of being difficult to separate water even if pressurized, so that when the plug 62 is extruded outwards by hot air in the cavity, the water in the plug 62 can be effectively prevented from flowing into the mounting seat 2 under the action of the extrusion force.

Illustratively, the drying plate 5 comprises a flexible water-permeable bag and a desiccant filled in the flexible water-permeable bag, and particularly, the desiccant is a silica gel desiccant, so that the desiccant can be reused, has a long service life, and reduces the replacement frequency.

For example, the mounting base 2 and the flexible water permeable bag are made of transparent materials, and color-changing silica gel is filled in the flexible water permeable bag; from this, because allochroic silica gel has the characteristic of meeting water and discolouing for allochroic silica gel utilizes transparent mount pad 2 to realize that the dry layer is visual as the indicator of dry layer state, thereby can directly judge whether dry plate 5 still has the ability of absorbing water through observing, and the timely processing of being convenient for is prevented suffering from in the bud.

Illustratively, in order to increase the speed of heat in the mounting seat 2 to be exhausted to the outside, the exhaust holes 23 are provided in plurality and uniformly spaced on the mounting seat 2 along the circumferential direction.

Illustratively, a protective cover 8 is covered on the mounting seat 2, and the upper surface of the protective cover 8 is an arc-shaped surface with an upward protruding middle part; from this, the protection casing 8 is not equipped with during the circuit board transportation, convenient vanning and transportation, and the circuit board is idle or cover protection casing 8 when using for rain water can flow around to its upper surface, reduces the rainwater that is detained on apron 3, can prevent simultaneously that the rainwater from permeating mount pad 2 on apron 3.

Illustratively, a groove 81 is formed in the protective cover 8, and the mounting seat 2 is arranged in the groove 81; due to the design, rainwater cannot flow along the outer wall of the mounting seat 2, and rainwater seeping from the drain holes and the electric wire 9 holes is reduced.

Illustratively, the protective cover 8 is screwed with the mounting base 2 for facilitating assembly and disassembly.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A waterproof circuit board is characterized by comprising a circuit board body and a mounting seat, wherein the mounting seat is provided with a mounting groove, the circuit board body is mounted at the groove bottom of the mounting groove, the mounting groove is provided with a placing groove, a heat-conducting plate, a drying plate and a cover plate are sequentially arranged on the placing groove from the groove bottom to a groove opening, the cover plate and the mounting seat are detachably connected, the groove wall of the placing groove is provided with an exhaust hole communicated with the outside, the exhaust hole is opposite to the drying plate, a one-way ventilation component capable of exhausting hot air in the waterproof circuit board to the outside is arranged in the exhaust hole, the exhaust hole comprises a large cylindrical hole, a first conical hole and a small cylindrical hole which are sequentially arranged from the outside to the inside and are communicated with each other, the one-way ventilation component comprises a hollow adjusting nut and a plug, the plug is made of water-absorbent resin, and the hollow adjusting nut is in threaded connection with the large cylindrical hole, the plug is movably arranged in the first taper hole, a compression spring is arranged between the plug and the hollow adjusting nut, the plug is in sealing fit with the inner wall of the first taper hole under the action of the compression spring, a line passing hole communicated with the outside is formed in the groove wall of the mounting groove, and a water absorbing assembly for preventing water from permeating is arranged in the line passing hole.

2. The waterproof circuit board according to claim 1, wherein the wire through hole comprises a cylindrical hole and a second tapered hole which are sequentially arranged from outside to inside and are communicated with each other, the water absorbing assembly comprises an elastic sealing ring and a sealing plate which are connected with each other, a wire hole through which a power supply wire can pass is arranged in the middle of each of the sealing plate and the elastic sealing ring, the sealing plate is in threaded connection with the cylindrical hole, and the elastic sealing ring is arranged in the second tapered hole.

3. The waterproof circuit board of claim 2, wherein a water absorption pad is disposed between the elastic sealing ring and the sealing plate, and the water absorption pad is made of water-absorbent resin.

4. The waterproof circuit board according to claim 1, wherein the dry plate includes a flexible water-permeable bag and a desiccant filled in the flexible water-permeable bag.

5. The waterproof circuit board of claim 4, wherein the mounting seat is made of a transparent material.

6. The waterproof circuit board according to claim 5, wherein the flexible water-permeable bag is made of a transparent material, and the flexible water-permeable bag is filled with allochroic silica gel.

7. The waterproof circuit board according to claim 1, wherein the exhaust holes are provided in plurality and uniformly spaced in a circumferential direction on the mount base.

8. The waterproof circuit board according to any one of claims 1 to 7, wherein the mounting seat upper cover is provided with a protective cover, and an upper surface of the protective cover is an arc-shaped surface protruding upward from the middle.

9. The waterproof circuit board of claim 8, wherein said protective cover has a recess therein, said mounting seat being disposed in said recess.

10. The waterproof circuit board of claim 8, wherein said protective cover is threadably connected to said mounting base.